[skip-ci] Update artifacts

Bump golang.org/x/net from 0.5.0 to 0.7.0

.github/dependabot.yml

@@ -0,0 +1,6 @@
+version: 2
+updates:
+  - package-ecosystem: "gomod"
+    directory: "/"
+    schedule:
+      interval: "weekly"

.github/workflows/pull_request.yaml

@@ -7,9 +7,9 @@ on:
 
 env:
   DOCKER_FILE_PATH: Dockerfile
-  GOLANG_VERSION: 1.15.2
+  GOLANG_VERSION: 1.20.0
   KUBERNETES_VERSION: "1.18.0"
-  KIND_VERSION: "0.7.0"
+  KIND_VERSION: "0.10.0"
 
 jobs:
   build:
@@ -18,17 +18,17 @@ jobs:
     if: "! contains(toJSON(github.event.commits.*.message), '[skip-ci]')"    
     steps:
     - name: Check out code
-      uses: actions/checkout@v2
+      uses: actions/checkout@v3
       with:
         ref: ${{github.event.pull_request.head.sha}}
         
     # Setting up helm binary
     - name: Set up Helm
-      uses: azure/setup-helm@v1
+      uses: azure/setup-helm@v3.4
 
     - name: Set up Go
       id: go
-      uses: actions/setup-go@v2
+      uses: actions/setup-go@v3
       with:
         go-version: ${{ env.GOLANG_VERSION }}
 
@@ -36,16 +36,21 @@ jobs:
       run: |
         make install
 
-    - name: Lint
-      run: |
-        curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.26.0
-        golangci-lint run --timeout=10m ./...
+    - name: Run golangci-lint
+      uses: golangci/golangci-lint-action@v3
+      with:
+        version: v1.51.1
+        only-new-issues: false
+        args: --timeout 10m
 
     - name: Helm Lint
       run: |
         cd deployments/kubernetes/chart/reloader
         helm lint
 
+    - name: Link check
+      uses: gaurav-nelson/github-action-markdown-link-check@v1
+
     - name: Install kubectl
       run: |
         curl -LO "https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl"
@@ -113,7 +118,7 @@ jobs:
       env:
        GITHUB_TOKEN: ${{ secrets.STAKATER_GITHUB_TOKEN }}
       with:
-        message: '@${{ github.actor }} Image is available for testing. `docker pull ${{ github.repository }}:${{ steps.generate_tag.outputs.GIT_TAG }}`'
+        message: '@${{ github.actor }} Image is available for testing. `docker pull ${{ env.IMAGE_REPOSITORY }}:${{ steps.generate_tag.outputs.GIT_TAG }}`'
         allow-repeats: false
 
     - name: Notify Failure

.github/workflows/push.yaml

@@ -7,9 +7,9 @@ on:
 
 env:
   DOCKER_FILE_PATH: Dockerfile
-  GOLANG_VERSION: 1.15.2
+  GOLANG_VERSION: 1.20.0
   KUBERNETES_VERSION: "1.18.0"
-  KIND_VERSION: "0.7.0"
+  KIND_VERSION: "0.10.0"
   HELM_REGISTRY_URL: "https://stakater.github.io/stakater-charts"
 
 jobs:
@@ -20,18 +20,18 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           persist-credentials: false # otherwise, the token used is the GITHUB_TOKEN, instead of your personal token
           fetch-depth: 0 # otherwise, you will fail to push refs to dest repo
 
       # Setting up helm binary
       - name: Set up Helm
-        uses: azure/setup-helm@v1
+        uses: azure/setup-helm@v3.4
 
       - name: Set up Go
         id: go
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ env.GOLANG_VERSION }}
 
@@ -39,11 +39,13 @@ jobs:
         run: |
           make install
 
-      - name: Lint
-        run: |
-          curl -sSfL https://raw.githubusercontent.com/golangci/golangci-lint/master/install.sh | sh -s -- -b $(go env GOPATH)/bin v1.26.0
-          golangci-lint run --timeout=10m ./...
-
+      - name: Run golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: v1.51.1
+          only-new-issues: false
+          args: --timeout 10m
+          
       - name: Install kubectl
         run: |
           curl -LO "https://storage.googleapis.com/kubernetes-release/release/v${KUBERNETES_VERSION}/bin/linux/amd64/kubectl"
@@ -68,7 +70,7 @@ jobs:
 
       - name: Generate Tag
         id: generate_tag
-        uses: anothrNick/github-tag-action@1.26.0
+        uses: anothrNick/github-tag-action@1.36.0
         env:
           GITHUB_TOKEN: ${{ secrets.STAKATER_GITHUB_TOKEN }}
           WITH_V: true
@@ -114,7 +116,7 @@ jobs:
       # Generate tag for operator without "v"
       - name: Generate Operator Tag
         id: generate_operator_tag
-        uses: anothrNick/github-tag-action@1.26.0
+        uses: anothrNick/github-tag-action@1.36.0
         env:
           GITHUB_TOKEN: ${{ secrets.STAKATER_GITHUB_TOKEN }}
           WITH_V: false
@@ -127,6 +129,11 @@ jobs:
           VERSION: ${{ steps.generate_operator_tag.outputs.new_tag }}
         run: make bump-chart
 
+      - name: Helm Template
+        run: |
+          helm template reloader deployments/kubernetes/chart/reloader/ > deployments/kubernetes/reloader.yaml
+          helm template reloader deployments/kubernetes/chart/reloader/ --output-dir deployments/kubernetes/manifests && mv deployments/kubernetes/manifests/reloader/templates/* deployments/kubernetes/manifests/ && rm -r deployments/kubernetes/manifests/reloader
+
       # Publish helm chart
       - name: Publish Helm chart
         uses: stefanprodan/helm-gh-pages@master
@@ -158,7 +165,7 @@ jobs:
           branch: ${{ github.ref }}
 
       - name: Push Latest Tag
-        uses: anothrNick/github-tag-action@1.26.0
+        uses: anothrNick/github-tag-action@1.36.0
         env:
           GITHUB_TOKEN: ${{ secrets.STAKATER_GITHUB_TOKEN }}
           WITH_V: true

.github/workflows/release.yaml

@@ -6,7 +6,7 @@ on:
       - "v*"
 
 env:
-  GOLANG_VERSION: 1.15.2
+  GOLANG_VERSION: 1.20.0
 
 jobs:
   build:
@@ -15,12 +15,12 @@ jobs:
 
     steps:
       - name: Check out code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3
         with:
           fetch-depth: 0 # See: https://goreleaser.com/ci/actions/
 
       - name: Set up Go 1.x
-        uses: actions/setup-go@v2
+        uses: actions/setup-go@v3
         with:
           go-version: ${{ env.GOLANG_VERSION }}
         id: go

.gitignore

@@ -8,4 +8,5 @@ _gopath/
 .DS_Store
 .vscode
 vendor
-dist
+dist
+Reloader

Dockerfile

@@ -1,8 +1,13 @@
+ARG BUILDER_IMAGE
+ARG BASE_IMAGE
+
 # Build the manager binary
-FROM --platform=${BUILDPLATFORM} golang:1.15.2 as builder
+FROM --platform=${BUILDPLATFORM} ${BUILDER_IMAGE:-golang:1.20.0} as builder
 
 ARG TARGETOS
 ARG TARGETARCH
+ARG GOPROXY
+ARG GOPRIVATE
 
 WORKDIR /workspace
 
@@ -19,14 +24,20 @@ COPY internal/ internal/
 COPY pkg/ pkg/
 
 # Build
-RUN CGO_ENABLED=0 GOOS=${TARGETOS} GOARCH=${TARGETARCH} GO111MODULE=on go build  -mod=mod -a -o manager main.go
+RUN CGO_ENABLED=0 \
+    GOOS=${TARGETOS} \
+    GOARCH=${TARGETARCH} \
+    GOPROXY=${GOPROXY} \
+    GOPRIVATE=${GOPRIVATE} \
+    GO111MODULE=on \
+    go build -mod=mod -a -o manager main.go
 
 # Use distroless as minimal base image to package the manager binary
 # Refer to https://github.com/GoogleContainerTools/distroless for more details
-FROM gcr.io/distroless/static:nonroot
+FROM ${BASE_IMAGE:-gcr.io/distroless/static:nonroot}
 WORKDIR /
 COPY --from=builder /workspace/manager .
-USER nonroot:nonroot
+USER 65532:65532
 
 # Port for metrics and probes
 EXPOSE 9090

Makefile

@@ -1,48 +1,57 @@
 # note: call scripts from /scripts
 
-.PHONY: default build builder-image binary-image test stop clean-images clean push apply deploy release release-all manifest push clean-image
+.PHONY: default build build-image test stop push apply deploy release release-all manifest push
 
 OS ?= linux
 ARCH ?= ???
 ALL_ARCH ?= arm64 arm amd64
 
-BUILDER ?= reloader-builder-${ARCH}
+BUILDER_IMAGE ?=
+BASE_IMAGE    ?=
 BINARY ?= Reloader
 DOCKER_IMAGE ?= stakater/reloader
-# Default value "dev"
-TAG ?= v0.0.75.0
-REPOSITORY_GENERIC = ${DOCKER_IMAGE}:${TAG}
-REPOSITORY_ARCH = ${DOCKER_IMAGE}:${TAG}-${ARCH}
 
+# Default value "dev"
 VERSION ?= 0.0.1
+
+REPOSITORY_GENERIC = ${DOCKER_IMAGE}:${VERSION}
+REPOSITORY_ARCH = ${DOCKER_IMAGE}:v${VERSION}-${ARCH}
 BUILD=
 
 GOCMD = go
 GOFLAGS ?= $(GOFLAGS:)
 LDFLAGS =
+GOPROXY   ?=
+GOPRIVATE ?=
 
 default: build test
 
 install:
 	"$(GOCMD)" mod download
 
+run:
+	go run ./main.go
+
 build:
 	"$(GOCMD)" build ${GOFLAGS} ${LDFLAGS} -o "${BINARY}"
 
-builder-image:
-	docker buildx build --platform ${OS}/${ARCH} --build-arg GOARCH=$(ARCH) -t "${BUILDER}" --load -f build/package/Dockerfile.build .
-
-reloader-${ARCH}.tar:
-	docker buildx build --platform ${OS}/${ARCH} --build-arg GOARCH=$(ARCH) -t "${BUILDER}" --load -f build/package/Dockerfile.build .
-	docker run --platform ${OS}/${ARCH} --rm "${BUILDER}" > reloader-${ARCH}.tar
-
-binary-image: builder-image
-	cat reloader-${ARCH}.tar | docker buildx build --platform ${OS}/${ARCH} -t "${REPOSITORY_ARCH}"  --load -f Dockerfile.run -
+build-image:
+	docker buildx build \
+		--platform ${OS}/${ARCH} \
+		--build-arg GOARCH=$(ARCH) \
+		--build-arg BUILDER_IMAGE=$(BUILDER_IMAGE) \
+		--build-arg BASE_IMAGE=${BASE_IMAGE} \
+		--build-arg GOPROXY=${GOPROXY} \
+		--build-arg GOPRIVATE=${GOPRIVATE} \
+		-t "${REPOSITORY_ARCH}" \
+		--load \
+		-f Dockerfile \
+		.
 
 push:
 	docker push ${REPOSITORY_ARCH}
 
-release:  binary-image push manifest
+release: build-image push manifest
 
 release-all:
 	-rm -rf ~/.docker/manifests/*
@@ -66,23 +75,6 @@ test:
 stop:
 	@docker stop "${BINARY}"
 
-clean-images: stop
-	-docker rmi "${BINARY}"
-	@for arch in $(ALL_ARCH) ; do \
-		echo Clean image: $$arch ; \
-		make clean-image ARCH=$$arch ; \
-	done
-	-docker rmi "${REPOSITORY_GENERIC}"
-
-clean-image:
-	-docker rmi "${BUILDER}"
-	-docker rmi "${REPOSITORY_ARCH}"
-	-rm -rf ~/.docker/manifests/*
-
-clean:
-	"$(GOCMD)" clean -i
-	-rm -rf reloader-*.tar
-
 apply:
 	kubectl apply -f deployments/manifests/ -n temp-reloader
 
@@ -93,3 +85,4 @@ bump-chart:
 	sed -i "s/^version:.*/version: v$(VERSION)/" deployments/kubernetes/chart/reloader/Chart.yaml
 	sed -i "s/^appVersion:.*/appVersion: v$(VERSION)/" deployments/kubernetes/chart/reloader/Chart.yaml
 	sed -i "s/tag:.*/tag: v$(VERSION)/" deployments/kubernetes/chart/reloader/values.yaml
+	sed -i "s/version:.*/version: v$(VERSION)/" deployments/kubernetes/chart/reloader/values.yaml

README.md

@@ -6,8 +6,6 @@
 [![GitHub tag](https://img.shields.io/github/tag/stakater/reloader.svg?style=flat-square)](https://github.com/stakater/reloader/releases/latest)
 [![Docker Pulls](https://img.shields.io/docker/pulls/stakater/reloader.svg?style=flat-square)](https://hub.docker.com/r/stakater/reloader/)
 [![Docker Stars](https://img.shields.io/docker/stars/stakater/reloader.svg?style=flat-square)](https://hub.docker.com/r/stakater/reloader/)
-[![MicroBadger Size](https://img.shields.io/microbadger/image-size/stakater/reloader.svg?style=flat-square)](https://microbadger.com/images/stakater/reloader)
-[![MicroBadger Layers](https://img.shields.io/microbadger/layers/stakater/reloader.svg?style=flat-square)](https://microbadger.com/images/stakater/reloader)
 [![license](https://img.shields.io/github/license/stakater/reloader.svg?style=flat-square)](LICENSE)
 [![Get started with Stakater](https://stakater.github.io/README/stakater-github-banner.png)](http://stakater.com/?utm_source=Reloader&utm_medium=github)
 
@@ -33,7 +31,8 @@ metadata:
   annotations:
     reloader.stakater.com/auto: "true"
 spec:
-  template: metadata:
+  template:
+    metadata:
 ```
 
 This will discover deploymentconfigs/deployments/daemonsets/statefulset/rollouts automatically where `foo-configmap` or `foo-secret` is being used either via environment variable or from volume mount. And it will perform rolling upgrade on related pods when `foo-configmap` or `foo-secret`are updated.
@@ -88,7 +87,8 @@ metadata:
   annotations:
     configmap.reloader.stakater.com/reload: "foo-configmap"
 spec:
-  template: metadata:
+  template:
+    metadata:
 ```
 
 Use comma separated list to define multiple configmaps.
@@ -99,7 +99,8 @@ metadata:
   annotations:
     configmap.reloader.stakater.com/reload: "foo-configmap,bar-configmap,baz-configmap"
 spec:
-  template: metadata:
+  template: 
+    metadata:
 ```
 
 ### Secret
@@ -114,7 +115,8 @@ metadata:
   annotations:
     secret.reloader.stakater.com/reload: "foo-secret"
 spec:
-  template: metadata:
+  template: 
+    metadata:
 ```
 
 Use comma separated list to define multiple secrets.
@@ -125,7 +127,8 @@ metadata:
   annotations:
     secret.reloader.stakater.com/reload: "foo-secret,bar-secret,baz-secret"
 spec:
-  template: metadata:
+  template: 
+    metadata:
 ```
 
 ### NOTES
@@ -140,8 +143,22 @@ spec:
 - you may override the configmap annotation with the `--configmap-annotation` flag
 - you may override the secret annotation with the `--secret-annotation` flag
 - you may want to prevent watching certain namespaces with the `--namespaces-to-ignore` flag
+- you may want to watch only a set of namespaces with certain labels by using the `--namespace-selector` flag
 - you may want to prevent watching certain resources with the `--resources-to-ignore` flag
 - you can configure logging in JSON format with the `--log-format=json` option
+- you can configure the "reload strategy" with the `--reload-strategy=<strategy-name>` option (details below)
+
+## Reload Strategies
+Reloader supports multiple "reload" strategies for performing rolling upgrades to resources. The following list describes them:
+- **env-vars**: When a tracked `configMap`/`secret` is updated, this strategy attaches a Reloader specific environment variable to any containers 
+  referencing the changed `configMap` or `secret` on the owning resource (e.g., `Deployment`, `StatefulSet`, etc.).
+  This strategy can be specified with the `--reload-strategy=env-vars` argument. Note: This is the default reload strategy.
+- **annotations**: When a tracked `configMap`/`secret` is updated, this strategy attaches a `reloader.stakater.com/last-reloaded-from` pod template annotation
+  on the owning resource (e.g., `Deployment`, `StatefulSet`, etc.). This strategy is useful when using resource syncing tools like ArgoCD, since it will not cause these tools
+  to detect configuration drift after a resource is reloaded. Note: Since the attached pod template annotation only tracks the last reload source, this strategy will reload any tracked resource should its 
+  `configMap` or `secret` be deleted and recreated.
+  This strategy can be specified with the `--reload-strategy=annotations` argument.
+  
 
 ## Deploying to Kubernetes
 
@@ -166,6 +183,25 @@ Reloader can be configured to ignore the resources `secrets` and `configmaps` by
 
 `Note`: At one time only one of these resource can be ignored, trying to do it will cause error in Reloader. Workaround for ignoring both resources is by scaling down the reloader pods to `0`.
 
+Reloader can be configured to watch only namespaces labeled with (one or more) labels of your choosing by using the `--namespace-selector` parameter, for example:
+```
+--namespace-selector=reloder:enabled,test:true
+```
+
+Only namespaces labeled like the following namespace YAML will be watched:
+```yaml
+kind: Namespace
+apiVersion: v1
+metadata:
+  ...
+  labels:
+    reloder: enabled
+    test: true
+  ...
+```
+If you want to select namespace only by the key of the label use ```*``` as the value.
+For example, for ```--namespace-selector=select-this:*``` all namespaces with label-key "select-this" will be selected regardless of the labels value
+
 ### Vanilla kustomize
 
 You can also apply the vanilla manifests by running the following command
@@ -217,9 +253,31 @@ Reloader can be configured to ignore the resources `secrets` and `configmaps` by
 
 `Note`: At one time only one of these resource can be ignored, trying to do it will cause error in helm template compilation.
 
+Reloader can be configured to watch only namespaces labeled with (one or more) labels of your choosing by using the `namespaceSelector` parameter
+
+| Parameter            | Description                                                    | Type    |
+| ----------------     | -------------------------------------------------------------- | ------- |
+| namespaceSelector    | list of comma separated key:value namespace                    | string  |
+
 You can also set the log format of Reloader to json by setting `logFormat` to `json` in values.yaml and apply the chart
 
-You can enable to scrape Reloader's Prometheus metrics by setting `serviceMonitor.enabled`  to `true` in values.yaml file.
+You can enable to scrape Reloader's Prometheus metrics by setting `serviceMonitor.enabled` or `podMonitor.enabled`  to `true` in values.yaml file. Service monitor will be removed in future releases of reloader in favour of Pod monitor.
+
+**Note:** Reloading of OpenShift (DeploymentConfig) and/or Argo Rollouts has to be enabled explicitly because it might not be always possible to use it on a cluster with restricted permissions. This can be done by changing the following parameters:
+
+| Parameter        | Description                                                                  | Type    |
+| ---------------- |------------------------------------------------------------------------------| ------- |
+| isOpenshift      | Enable OpenShift DeploymentConfigs. Valid value are either `true` or `false` | boolean |
+| isArgoRollouts   | Enable Argo Rollouts. Valid value are either `true` or `false`               | boolean |
+| reloadOnCreate   | Enable reload on create events. Valid value are either `true` or `false`     | boolean |
+
+**ReloadOnCreate** reloadOnCreate controls how Reloader handles secrets being added to the cache for the first time. If reloadOnCreate is set to true:
+* Configmaps/secrets being added to the cache will cause Reloader to perform a rolling update of the associated workload. 
+* When applications are deployed for the first time, Reloader will perform a rolling update of the associated workload. 
+* If you are running Reloader in HA mode all workloads will have a rolling update performed when a new leader is elected. 
+
+If ReloadOnCreate is set to false: 
+* Updates to configMaps/Secrets that occur while there is no leader will not be picked up by the new leader until a subsequent update of the configmap/secret occurs. In the worst case the window in which there can be no leader is 15s as this is the LeaseDuration.
 
 ## Help
 

build/package/Dockerfile.build

@@ -1,26 +0,0 @@
-FROM golang:1.15.2-alpine
-LABEL maintainer "Stakater Team"
-
-ARG GOARCH=amd64
-
-RUN apk -v --update \
-    --no-cache \
-    add git build-base
-
-WORKDIR "$GOPATH/src/github.com/stakater/Reloader"
-
-COPY go.mod go.sum ./
-
-RUN go mod download
-
-COPY . .
-
-ENV CGO_ENABLED=0 GOOS=linux GOARCH=$GOARCH
-
-RUN go build -a --installsuffix cgo --ldflags="-s" -o /Reloader
-
-COPY build/package/Dockerfile.run /
-
-# Running this image produces a tarball suitable to be piped into another
-# Docker build command.
-CMD tar -cf - -C / Dockerfile.run Reloader

build/package/Dockerfile.run

@@ -1,14 +0,0 @@
-FROM alpine:3.11
-LABEL maintainer "Stakater Team"
-
-RUN apk add --update --no-cache ca-certificates
-
-COPY Reloader /bin/Reloader
-
-# On alpine 'nobody' has uid 65534
-USER 65534
-
-# Port for metrics and probes
-EXPOSE 9090
-
-ENTRYPOINT ["/bin/Reloader"]

deployments/kubernetes/chart/reloader/Chart.yaml

@@ -3,29 +3,19 @@
 apiVersion: v1
 name: reloader
 description: Reloader chart that runs on kubernetes
-version: v0.0.87
-appVersion: v0.0.87
+version: v1.0.8
+appVersion: v1.0.8
 keywords:
   - Reloader
   - kubernetes
 home: https://github.com/stakater/Reloader
 sources:
-  - https://github.com/stakater/IngressMonitorController
+  - https://github.com/stakater/Reloader
 icon: https://raw.githubusercontent.com/stakater/Reloader/master/assets/web/reloader-round-100px.png
 maintainers:
   - name: Stakater
     email: hello@stakater.com
   - name: rasheedamir
-    email: rasheed@aurorasolutions.io
-  - name: waseem-h
-    email: waseemhassan@stakater.com
+    email: rasheed@stakater.com
   - name: faizanahmad055
     email: faizan.ahmad55@outlook.com
-  - name: kahootali
-    email: ali.kahoot@aurorasolutions.io
-  - name: ahmadiq
-    email: ahmad@aurorasolutions.io
-  - name: ahsan-storm
-    email: ahsanmuhammad1@outlook.com
-  - name: ahmedwaleedmalik
-    email: waleed@stakater.com

deployments/kubernetes/chart/reloader/templates/NOTES.txt

@@ -1,7 +1,7 @@
 - For a `Deployment` called `foo` have a `ConfigMap` called `foo-configmap`. Then add this annotation to main metadata of your `Deployment`
-  configmap.reloader.stakater.com/reload: "foo-configmap"
+  {{ .Values.reloader.custom_annotations.configmap | default "configmap.reloader.stakater.com/reload" }}: "foo-configmap"
 
-- For a `Deployment` called `foo` have a `Secret` called `foo-secret`. Then add this annotation to main metadata of  your `Deployment`
-  secret.reloader.stakater.com/reload: "foo-secret"
+- For a `Deployment` called `foo` have a `Secret` called `foo-secret`. Then add this annotation to main metadata of your `Deployment`
+  {{ .Values.reloader.custom_annotations.secret | default "secret.reloader.stakater.com/reload" }}: "foo-secret"
 
 - After successful installation, your pods will get rolling updates when a change in data of configmap or secret will happen.

deployments/kubernetes/chart/reloader/templates/_helpers.tpl

@@ -28,6 +28,23 @@ heritage: {{ .Release.Service | quote }}
 app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
 {{- end -}}
 
+{{/*
+Create pod anti affinity labels
+*/}}
+{{- define "reloader-podAntiAffinity" -}}
+podAntiAffinity:
+  preferredDuringSchedulingIgnoredDuringExecution:
+  - weight: 100
+    podAffinityTerm:
+      labelSelector:
+        matchExpressions:
+        - key: app
+          operator: In
+          values:
+          - {{ template "reloader-fullname" . }}
+      topologyKey: "kubernetes.io/hostname"
+{{- end -}}
+
 {{/*
 Create the name of the service account to use
 */}}
@@ -45,4 +62,4 @@ Create the annotations to support helm3
 {{- define "reloader-helm3.annotations" -}}
 meta.helm.sh/release-namespace: {{ .Release.Namespace | quote }}
 meta.helm.sh/release-name: {{ .Release.Name | quote }}
-{{- end -}}
+{{- end -}}

deployments/kubernetes/chart/reloader/templates/clusterrole.yaml

@@ -17,7 +17,7 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}-role
-  namespace: {{ .Release.Namespace }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 rules:
   - apiGroups:
       - ""
@@ -32,7 +32,15 @@ rules:
       - list
       - get
       - watch
-{{- if or (.Capabilities.APIVersions.Has "apps.openshift.io/v1") (.Values.reloader.isOpenshift) }}
+{{- if .Values.reloader.namespaceSelector }}
+  - apiGroups:
+      - ""
+    resources:
+      - namespaces
+    verbs:
+      - get         
+{{- end }}      
+{{- if and (.Capabilities.APIVersions.Has "apps.openshift.io/v1") (.Values.reloader.isOpenshift) }}
   - apiGroups:
       - "apps.openshift.io"
       - ""
@@ -44,7 +52,7 @@ rules:
       - update
       - patch
 {{- end }}
-{{- if or (.Capabilities.APIVersions.Has "argoproj.io/v1alpha1") (.Values.reloader.isArgoRollouts) }}
+{{- if and (.Capabilities.APIVersions.Has "argoproj.io/v1alpha1") (.Values.reloader.isArgoRollouts) }}
   - apiGroups:
       - "argoproj.io"
       - ""
@@ -77,4 +85,21 @@ rules:
       - get
       - update
       - patch
+{{- if .Values.reloader.enableHA }}
+  - apiGroups:
+      - "coordination.k8s.io"
+    resources:
+      - leases
+    verbs:
+      - create
+      - get
+      - update
+{{- end}}
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch
 {{- end }}

deployments/kubernetes/chart/reloader/templates/clusterrolebinding.yaml

@@ -17,7 +17,7 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}-role-binding
-  namespace: {{ .Release.Namespace }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: ClusterRole
@@ -25,5 +25,5 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: {{ template "reloader-serviceAccountName" . }}
-    namespace: {{ .Release.Namespace }}
+    namespace: {{ .Values.namespace | default .Release.Namespace }}
 {{- end }}

deployments/kubernetes/chart/reloader/templates/deployment.yaml

@@ -15,8 +15,13 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 spec:
+{{- if not (.Values.reloader.enableHA) }}
   replicas: 1
+{{- else }}
+  replicas: {{ .Values.reloader.deployment.replicas }}
+{{- end}}
   revisionHistoryLimit: 2
   selector:
     matchLabels:
@@ -40,23 +45,33 @@ spec:
 {{ toYaml .Values.reloader.matchLabels | indent 8 }}
 {{- end }}
     spec:
+      {{- with .Values.reloader.deployment.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
       {{- if .Values.reloader.deployment.nodeSelector }}
       nodeSelector:
 {{ toYaml .Values.reloader.deployment.nodeSelector | indent 8 }}
       {{- end }}
-      {{- if .Values.reloader.deployment.affinity }}
+      {{- if or (.Values.reloader.deployment.affinity) (.Values.reloader.enableHA) }}
       affinity:
+      {{- if .Values.reloader.deployment.affinity }}
 {{ toYaml .Values.reloader.deployment.affinity | indent 8 }}
+      {{- end}}
+{{ include "reloader-podAntiAffinity" . | indent 8 }}
       {{- end }}
       {{- if .Values.reloader.deployment.tolerations }}
       tolerations:
 {{ toYaml .Values.reloader.deployment.tolerations | indent 8 }}
+      {{- end }}
+      {{- if .Values.reloader.deployment.priorityClassName }}
+      priorityClassName: {{ .Values.reloader.deployment.priorityClassName }}
       {{- end }}
       containers:
       - image: "{{ .Values.reloader.deployment.image.name }}:{{ .Values.reloader.deployment.image.tag }}"
         imagePullPolicy: {{ .Values.reloader.deployment.image.pullPolicy }}
         name: {{ template "reloader-fullname" . }}
-      {{- if or (.Values.reloader.deployment.env.open) (.Values.reloader.deployment.env.secret) (.Values.reloader.deployment.env.field) (eq .Values.reloader.watchGlobally false) }}
+      {{- if or (.Values.reloader.deployment.env.open) (.Values.reloader.deployment.env.secret) (.Values.reloader.deployment.env.field) (.Values.reloader.deployment.env.existing) (eq .Values.reloader.watchGlobally false) (.Values.reloader.enableHA)}}
         env:
       {{- range $name, $value := .Values.reloader.deployment.env.open }}
       {{- if not (empty $value) }}
@@ -74,6 +89,17 @@ spec:
               key: {{ $name | quote }}
       {{- end }}
       {{- end }}
+      {{- range $secret, $values := .Values.reloader.deployment.env.existing }}
+      {{- range $name, $key := $values }}
+      {{- if not ( empty $name) }}
+        - name: {{ $name | quote }}
+          valueFrom:
+            secretKeyRef:
+              name: {{ $secret | quote }}
+              key: {{ $key | quote }}
+      {{- end }}
+      {{- end }}
+      {{- end }}
       {{- range $name, $value := .Values.reloader.deployment.env.field }}
       {{- if not ( empty $value) }}
         - name: {{ $name | quote }}
@@ -88,6 +114,16 @@ spec:
             fieldRef:
               fieldPath: metadata.namespace
       {{- end }}
+      {{- if .Values.reloader.enableHA }}
+        - name: POD_NAME
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.name
+        - name: POD_NAMESPACE
+          valueFrom:
+            fieldRef:
+              fieldPath: metadata.namespace
+      {{- end }}
       {{- end }}
 
         ports:
@@ -95,19 +131,35 @@ spec:
           containerPort: 9090
         livenessProbe:
           httpGet:
-            path: /metrics
+            path: /live
             port: http
+          timeoutSeconds: {{ .Values.reloader.deployment.livenessProbe.timeoutSeconds | default "5" }}
+          failureThreshold: {{ .Values.reloader.deployment.livenessProbe.failureThreshold | default "5" }}
+          periodSeconds: {{ .Values.reloader.deployment.livenessProbe.periodSeconds | default "10" }}
+          successThreshold: {{ .Values.reloader.deployment.livenessProbe.successThreshold | default "1" }}
         readinessProbe:
           httpGet:
             path: /metrics
             port: http
+          timeoutSeconds: {{ .Values.reloader.deployment.readinessProbe.timeoutSeconds | default "5" }}
+          failureThreshold: {{ .Values.reloader.deployment.readinessProbe.failureThreshold | default "5" }}
+          periodSeconds: {{ .Values.reloader.deployment.readinessProbe.periodSeconds | default "10" }}
+          successThreshold: {{ .Values.reloader.deployment.readinessProbe.successThreshold | default "1" }}
+
+        {{- $containerSecurityContext := .Values.reloader.deployment.containerSecurityContext | default dict }}
+        {{- if .Values.reloader.readOnlyRootFileSystem }}
+          {{- $_ := set $containerSecurityContext "readOnlyRootFilesystem" true }}
+        {{- end }}
+
+        securityContext:
+          {{- toYaml $containerSecurityContext | nindent 10 }}
 
       {{- if eq .Values.reloader.readOnlyRootFileSystem true }}
         volumeMounts:
           - mountPath: /tmp/
             name: tmp-volume
       {{- end }}
-      {{- if or (.Values.reloader.logFormat) (.Values.reloader.ignoreSecrets) (.Values.reloader.ignoreNamespaces) (.Values.reloader.ignoreConfigMaps) (.Values.reloader.custom_annotations) (eq .Values.reloader.isArgoRollouts true) }}
+      {{- if or (.Values.reloader.logFormat) (.Values.reloader.ignoreSecrets) (.Values.reloader.ignoreNamespaces) (.Values.reloader.namespaceSelector) (.Values.reloader.ignoreConfigMaps) (.Values.reloader.custom_annotations) (eq .Values.reloader.isArgoRollouts true) (eq .Values.reloader.reloadOnCreate true) (ne .Values.reloader.reloadStrategy "default") (.Values.reloader.enableHA)}}
         args:
           {{- if .Values.reloader.logFormat }}
           - "--log-format={{ .Values.reloader.logFormat }}"
@@ -121,7 +173,9 @@ spec:
           {{- if .Values.reloader.ignoreNamespaces }}
           - "--namespaces-to-ignore={{ .Values.reloader.ignoreNamespaces }}"
           {{- end }}
-
+          {{- if .Values.reloader.namespaceSelector }}
+          - "--namespace-selector={{ .Values.reloader.namespaceSelector }}"
+          {{- end }}          
           {{- if .Values.reloader.custom_annotations }}
             {{- if .Values.reloader.custom_annotations.configmap }}
           - "--configmap-annotation"
@@ -147,6 +201,15 @@ spec:
           {{- if eq .Values.reloader.isArgoRollouts true }}
           - "--is-Argo-Rollouts={{ .Values.reloader.isArgoRollouts }}"
           {{- end }}
+          {{- if eq .Values.reloader.reloadOnCreate true }}
+          - "--reload-on-create={{ .Values.reloader.reloadOnCreate }}"
+          {{- end }}
+          {{- if ne .Values.reloader.reloadStrategy "default" }}
+          - "--reload-strategy={{ .Values.reloader.reloadStrategy }}"
+          {{- end }}
+          {{- if or (gt .Values.reloader.deployment.replicas 1.0) (.Values.reloader.enableHA) }}
+          - "--enable-ha=true"
+          {{- end}}
       {{- end }}
       {{- if .Values.reloader.deployment.resources }}
         resources:
@@ -156,6 +219,9 @@ spec:
       securityContext: {{ toYaml .Values.reloader.deployment.securityContext | nindent 8 }}
 {{- end }}
       serviceAccountName: {{ template "reloader-serviceAccountName" . }}
+{{- if hasKey .Values.reloader.deployment "automountServiceAccountToken" }}
+      automountServiceAccountToken: {{ .Values.reloader.deployment.automountServiceAccountToken }}
+{{- end }}
     {{- if eq .Values.reloader.readOnlyRootFileSystem true }}
       volumes:
         - emptyDir: {}

deployments/kubernetes/chart/reloader/templates/poddisruptionbudget.yaml

@@ -0,0 +1,11 @@
+{{- if .Values.reloader.podDisruptionBudget.enabled }}
+apiVersion: policy/v1
+kind: PodDisruptionBudget
+metadata:
+  name: {{ template "reloader-fullname" . }}
+spec:
+  minAvailable: {{ .Values.reloader.podDisruptionBudget.minAvailable }}
+  selector:
+    matchLabels:
+      app: {{ template "reloader-fullname" . }}
+{{- end }}

deployments/kubernetes/chart/reloader/templates/podmonitor.yaml

@@ -0,0 +1,58 @@
+{{- if ( .Values.reloader.podMonitor.enabled ) }}
+apiVersion: monitoring.coreos.com/v1
+kind: PodMonitor
+metadata:
+{{- if .Values.reloader.podMonitor.annotations }}
+  annotations:
+{{ tpl (toYaml .Values.reloader.podMonitor.annotations) . | indent 4 }}
+{{- end }}
+  labels:
+{{ include "reloader-labels.chart" . | indent 4 }}
+{{- if .Values.reloader.podMonitor.labels }}
+{{ tpl (toYaml .Values.reloader.podMonitor.labels) . | indent 4 }}
+{{- end }}
+  name: {{ template "reloader-fullname" . }}
+{{- if .Values.reloader.podMonitor.namespace }}
+  namespace: {{ tpl .Values.reloader.podMonitor.namespace . }}
+{{- end }}
+spec:
+  podMetricsEndpoints:
+  - port: http
+    path: "/metrics"
+    {{- with .Values.reloader.podMonitor.interval }}
+    interval: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.podMonitor.scheme }}
+    scheme: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.podMonitor.bearerTokenSecret }}
+    bearerTokenSecret: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.podMonitor.tlsConfig }}
+    tlsConfig:
+      {{- toYaml .| nindent 6 }}
+    {{- end }}
+    {{- with .Values.reloader.podMonitor.timeout }}
+    scrapeTimeout: {{ . }}
+    {{- end }}
+    honorLabels: {{ .Values.reloader.podMonitor.honorLabels }}
+    {{- with .Values.reloader.podMonitor.metricRelabelings }}
+    metricRelabelings:
+      {{- tpl (toYaml . | nindent 6) $ }}
+    {{- end }}
+    {{- with .Values.reloader.podMonitor.relabelings }}
+    relabelings:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+  {{- with .Values.reloader.podMonitor.podTargetLabels }}
+  podTargetLabels:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+  jobLabel: {{ template "reloader-fullname" . }}
+  namespaceSelector:
+    matchNames:
+    - {{ .Release.Namespace }}
+  selector:
+    matchLabels:
+      {{ include "reloader-labels.chart" . | nindent 6 }}
+{{- end }}

deployments/kubernetes/chart/reloader/templates/role.yaml

@@ -17,7 +17,7 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}-role
-  namespace: {{ .Release.Namespace }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 rules:
   - apiGroups:
       - ""
@@ -32,7 +32,7 @@ rules:
       - list
       - get
       - watch
-{{- if or (.Capabilities.APIVersions.Has "apps.openshift.io/v1") (.Values.reloader.isOpenshift) }}
+{{- if and (.Capabilities.APIVersions.Has "apps.openshift.io/v1") (.Values.reloader.isOpenshift) }}
   - apiGroups:
       - "apps.openshift.io"
       - ""
@@ -44,7 +44,7 @@ rules:
       - update
       - patch
 {{- end }}
-{{- if or (.Capabilities.APIVersions.Has "argoproj.io/v1alpha1") (.Values.reloader.isArgoRollouts) }}
+{{- if and (.Capabilities.APIVersions.Has "argoproj.io/v1alpha1") (.Values.reloader.isArgoRollouts) }}
   - apiGroups:
       - "argoproj.io"
       - ""
@@ -77,4 +77,21 @@ rules:
       - get
       - update
       - patch
+{{- if .Values.reloader.enableHA }}
+  - apiGroups:
+      - "coordination.k8s.io"
+    resources:
+      - leases
+    verbs:
+      - create
+      - get
+      - update
+{{- end}}
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch
 {{- end }}

deployments/kubernetes/chart/reloader/templates/rolebinding.yaml

@@ -17,7 +17,7 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}-role-binding
-  namespace: {{ .Release.Namespace }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 roleRef:
   apiGroup: rbac.authorization.k8s.io
   kind: Role
@@ -25,5 +25,5 @@ roleRef:
 subjects:
   - kind: ServiceAccount
     name: {{ template "reloader-serviceAccountName" . }}
-    namespace: {{ .Release.Namespace }}
+    namespace: {{ .Values.namespace | default .Release.Namespace }}
 {{- end }}

deployments/kubernetes/chart/reloader/templates/secret.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.reloader.deployment.env.secret -}}
+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ template "reloader-fullname" . }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
+type: Opaque
+data:
+  {{ if .Values.reloader.deployment.env.secret.ALERT_ON_RELOAD -}}
+  ALERT_ON_RELOAD: {{ .Values.reloader.deployment.env.secret.ALERT_ON_RELOAD | b64enc | quote }}
+  {{ end }}
+  {{- if .Values.reloader.deployment.env.secret.ALERT_SINK -}}
+  ALERT_SINK: {{ .Values.reloader.deployment.env.secret.ALERT_SINK | b64enc | quote }}
+  {{ end }}
+  {{- if .Values.reloader.deployment.env.secret.ALERT_WEBHOOK_URL -}}
+  ALERT_WEBHOOK_URL: {{ .Values.reloader.deployment.env.secret.ALERT_WEBHOOK_URL | b64enc | quote }}
+  {{ end }}
+  {{- if .Values.reloader.deployment.env.secret.ALERT_ADDITIONAL_INFO -}}
+  ALERT_ADDITIONAL_INFO: {{ .Values.reloader.deployment.env.secret.ALERT_ADDITIONAL_INFO | b64enc | quote }}
+  {{ end }}
+{{ end }}

deployments/kubernetes/chart/reloader/templates/service.yaml

@@ -13,6 +13,7 @@ metadata:
 {{ toYaml .Values.reloader.service.labels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 spec:
   selector:
 {{- if .Values.reloader.deployment.labels }}

deployments/kubernetes/chart/reloader/templates/serviceaccount.yaml

@@ -4,6 +4,9 @@ kind: ServiceAccount
 {{- if .Values.global.imagePullSecrets }}
 imagePullSecrets: {{ toYaml .Values.global.imagePullSecrets | nindent 2 }}
 {{- end }}
+{{- if hasKey .Values.reloader.serviceAccount "automountServiceAccountToken" }}
+automountServiceAccountToken: {{ .Values.reloader.serviceAccount.automountServiceAccountToken }}
+{{- end }}
 metadata:
   annotations:
 {{ include "reloader-helm3.annotations" . | indent 4 }}
@@ -19,4 +22,5 @@ metadata:
 {{ toYaml .Values.reloader.matchLabels | indent 4 }}
 {{- end }}
   name: {{ template "reloader-serviceAccountName" . }}
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 {{- end }}

deployments/kubernetes/chart/reloader/templates/servicemonitor.yaml

@@ -2,25 +2,52 @@
 apiVersion: monitoring.coreos.com/v1
 kind: ServiceMonitor
 metadata:
+{{- if .Values.reloader.serviceMonitor.annotations }}
+  annotations:
+{{ tpl (toYaml .Values.reloader.serviceMonitor.annotations) . | indent 4 }}
+{{- end }}
   labels:
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.serviceMonitor.labels }}
-{{ toYaml .Values.reloader.serviceMonitor.labels | indent 4}}
+{{ tpl (toYaml .Values.reloader.serviceMonitor.labels) . | indent 4 }}
 {{- end }}
   name: {{ template "reloader-fullname" . }}
 {{- if .Values.reloader.serviceMonitor.namespace }}
-  namespace: {{ .Values.reloader.serviceMonitor.namespace }}
+  namespace: {{ tpl .Values.reloader.serviceMonitor.namespace . }}
 {{- end }}
 spec:
   endpoints:
   - targetPort: http
     path: "/metrics"
-{{- if .Values.reloader.serviceMonitor.interval }}
-    interval: {{ .Values.reloader.serviceMonitor.interval }}
-{{- end }}
-{{- if .Values.reloader.serviceMonitor.timeout }}
-    scrapeTimeout: {{ .Values.reloader.serviceMonitor.timeout }}
-{{- end }}
+    {{- with .Values.reloader.serviceMonitor.interval }}
+    interval: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.serviceMonitor.scheme }}
+    scheme: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.serviceMonitor.bearerTokenFile }}
+    bearerTokenFile: {{ . }}
+    {{- end }}
+    {{- with .Values.reloader.serviceMonitor.tlsConfig }}
+    tlsConfig:
+      {{- toYaml .| nindent 6 }}
+    {{- end }}
+    {{- with .Values.reloader.serviceMonitor.timeout }}
+    scrapeTimeout: {{ . }}
+    {{- end }}
+    honorLabels: {{ .Values.reloader.serviceMonitor.honorLabels }}
+    {{- with .Values.reloader.serviceMonitor.metricRelabelings }}
+    metricRelabelings:
+      {{- tpl (toYaml . | nindent 6) $ }}
+    {{- end }}
+    {{- with .Values.reloader.serviceMonitor.relabelings }}
+    relabelings:
+      {{- toYaml . | nindent 6 }}
+    {{- end }}
+  {{- with .Values.reloader.serviceMonitor.targetLabels }}
+  targetLabels:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
   jobLabel: {{ template "reloader-fullname" . }}
   namespaceSelector:
     matchNames:

deployments/kubernetes/chart/reloader/tests/deployment_test.yaml

@@ -0,0 +1,50 @@
+suite: Deployment
+
+templates:
+  - deployment.yaml
+
+tests:
+  - it: sets readOnlyRootFilesystem in container securityContext when reloader.readOnlyRootFileSystem is true
+    set:
+      reloader:
+        readOnlyRootFileSystem: true
+        deployment:
+          containerSecurityContext:
+            readOnlyRootFilesystem: false
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].securityContext.readOnlyRootFilesystem
+          value: true
+
+  - it: sets readOnlyRootFilesystem in container securityContext even if reloader.deployment.containerSecurityContext is null
+    set:
+      reloader:
+        readOnlyRootFileSystem: true
+        deployment:
+          containerSecurityContext: null
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].securityContext.readOnlyRootFilesystem
+          value: true
+
+  - it: does not override readOnlyRootFilesystem in container securityContext based on reloader.readOnlyRootFileSystem
+    set:
+      reloader:
+        readOnlyRootFileSystem: false
+        deployment:
+          containerSecurityContext:
+            readOnlyRootFilesystem: true
+    asserts:
+      - equal:
+          path: spec.template.spec.containers[0].securityContext.readOnlyRootFilesystem
+          value: true
+
+  - it: template is still valid with no defined containerSecurityContext
+    set:
+      reloader:
+        readOnlyRootFileSystem: false
+        deployment:
+          containerSecurityContext: null
+    asserts:
+      - isEmpty:
+          path: spec.template.spec.containers[0].securityContext

deployments/kubernetes/chart/reloader/values.schema.json

@@ -0,0 +1,19 @@
+{
+  "$schema": "http://json-schema.org/schema#",
+  "type": "object",
+  "properties": {
+    "reloader": {
+      "type": "object",
+      "properties": {
+        "reloadStrategy": {
+          "type": "string",
+          "enum": [
+            "default",
+            "env-vars",
+            "annotations"
+          ]
+        }
+      }
+    }
+  }
+}

deployments/kubernetes/chart/reloader/values.yaml

@@ -13,15 +13,22 @@ reloader:
   isOpenshift: false
   ignoreSecrets: false
   ignoreConfigMaps: false
+  reloadOnCreate: false
+  reloadStrategy: default # Set to default, env-vars or annotations
   ignoreNamespaces: "" # Comma separated list of namespaces to ignore
+  namespaceSelector: "" # Comma separated list of 'key:value' labels for namespaces selection
   logFormat: "" #json
   watchGlobally: true
+  # Set to true to enable leadership election allowing you to run multiple replicas
+  enableHA: false
   # Set to true if you have a pod security policy that enforces readOnlyRootFilesystem
   readOnlyRootFileSystem: false
   legacy:
     rbac: false
   matchLabels: {}
   deployment:
+    # If you wish to run multiple replicas set reloader.enableHA = true
+    replicas: 1
     nodeSelector:
     # cloud.google.com/gke-nodepool: default-pool
 
@@ -40,6 +47,13 @@ reloader:
       runAsNonRoot: true
       runAsUser: 65534
 
+    containerSecurityContext: {}
+      # capabilities:
+      #   drop:
+      #     - ALL
+      # allowPrivilegeEscalation: false
+      # readOnlyRootFilesystem: true
+
     # A list of tolerations to be applied to the Deployment.
     # Example:
     #   tolerations:
@@ -52,10 +66,10 @@ reloader:
     labels:
       provider: stakater
       group: com.stakater.platform
-      version: v0.0.77
+      version: v1.0.8
     image:
       name: stakater/reloader
-      tag: v0.0.87
+      tag: v1.0.8
       pullPolicy: IfNotPresent
     # Support for extra environment variables.
     env:
@@ -63,8 +77,33 @@ reloader:
       open:
       # secret supports Key value pair as environment variables. It gets the values based on keys from default reloader secret if any.
       secret:
+      #  ALERT_ON_RELOAD: <"true"|"false">
+      #  ALERT_SINK: <"slack"> # By default it will be a raw text based webhook
+      #  ALERT_WEBHOOK_URL: <"webhook_url">
+      #  ALERT_ADDITIONAL_INFO: <"Additional Info like Cluster Name if needed">
       # field supports Key value pair as environment variables. It gets the values from other fields of pod.
       field:
+      # existing secret, you can specify multiple existing secrets, for each
+      # specify the env var name followed by the key in existing secret that
+      # will be used to populate the env var
+      existing:
+      #  existing_secret_name:
+      #    ALERT_ON_RELOAD: alert_on_reload_key
+      #    ALERT_SINK: alert_sink_key
+      #    ALERT_WEBHOOK_URL: alert_webhook_key
+      #    ALERT_ADDITIONAL_INFO: alert_additional_info_key
+
+    # Liveness and readiness probe timeout values.
+    livenessProbe: {}
+    #  timeoutSeconds: 5
+    #  failureThreshold: 5
+    #  periodSeconds: 10
+    #  successThreshold: 1
+    readinessProbe: {}
+    #  timeoutSeconds: 15
+    #  failureThreshold: 5
+    #  periodSeconds: 10
+    #  successThreshold: 1
 
     # Specify resource requests/limits for the deployment.
     # Example:
@@ -78,6 +117,9 @@ reloader:
     resources: {}
     pod:
       annotations: {}
+    priorityClassName: ""
+    # imagePullSecrets:
+    #   - name: myregistrykey
 
   service: {}
     # labels: {}
@@ -95,22 +137,117 @@ reloader:
     annotations: {}
     # The name of the ServiceAccount to use.
     # If not set and create is true, a name is generated using the fullname template
-    name: 
+    name:
   # Optional flags to pass to the Reloader entrypoint
   # Example:
   #   custom_annotations:
   #     configmap: "my.company.com/configmap"
   #     secret: "my.company.com/secret"
   custom_annotations: {}
+
   serviceMonitor:
-    # enabling this requires service to be enabled as well, or no endpoints will be found
+    # Deprecated: Service monitor will be removed in future releases of reloader in favour of Pod monitor
+    # Enabling this requires service to be enabled as well, or no endpoints will be found
     enabled: false
     # Set the namespace the ServiceMonitor should be deployed
     # namespace: monitoring
-    # Set how frequently Prometheus should scrape
-    # interval: 30s
-    # Set labels for the ServiceMonitor, use this to define your scrape label for Prometheus Operator
-    # labels:
-    # Set timeout for scrape
-    # timeout: 10s
-  
+
+    # Fallback to the prometheus default unless specified
+    # interval: 10s
+
+    ## scheme: HTTP scheme to use for scraping. Can be used with `tlsConfig` for example if using istio mTLS.
+    # scheme: ""
+
+    ## tlsConfig: TLS configuration to use when scraping the endpoint. For example if using istio mTLS.
+    ## Of type: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#tlsconfig
+    # tlsConfig: {}
+
+    # bearerTokenFile:
+    # Fallback to the prometheus default unless specified
+    # timeout: 30s
+
+    ## Used to pass Labels that are used by the Prometheus installed in your cluster to select Service Monitors to work with
+    ## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#prometheusspec
+    labels: {}
+
+    ## Used to pass annotations that are used by the Prometheus installed in your cluster to select Service Monitors to work with
+    ## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#prometheusspec
+    annotations: {}
+
+    # Retain the job and instance labels of the metrics pushed to the Pushgateway
+    # [Scraping Pushgateway](https://github.com/prometheus/pushgateway#configure-the-pushgateway-as-a-target-to-scrape)
+    honorLabels: true
+
+    ## Metric relabel configs to apply to samples before ingestion.
+    ## [Metric Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs)
+    metricRelabelings: []
+    # - action: keep
+    #   regex: 'kube_(daemonset|deployment|pod|namespace|node|statefulset).+'
+    #   sourceLabels: [__name__]
+
+    ## Relabel configs to apply to samples before ingestion.
+    ## [Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config)
+    relabelings: []
+    # - sourceLabels: [__meta_kubernetes_pod_node_name]
+    #   separator: ;
+    #   regex: ^(.*)$
+    #   targetLabel: nodename
+    #   replacement: $1
+    #   action: replace
+
+    targetLabels: []
+
+  podMonitor:
+    enabled: false
+    # Set the namespace the podMonitor should be deployed
+    # namespace: monitoring
+
+    # Fallback to the prometheus default unless specified
+    # interval: 10s
+
+    ## scheme: HTTP scheme to use for scraping. Can be used with `tlsConfig` for example if using istio mTLS.
+    # scheme: ""
+
+    ## tlsConfig: TLS configuration to use when scraping the endpoint. For example if using istio mTLS.
+    ## Of type: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#tlsconfig
+    # tlsConfig: {}
+
+    # bearerTokenSecret:
+    # Fallback to the prometheus default unless specified
+    # timeout: 30s
+
+    ## Used to pass Labels that are used by the Prometheus installed in your cluster to select Service Monitors to work with
+    ## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#prometheusspec
+    labels: {}
+
+    ## Used to pass annotations that are used by the Prometheus installed in your cluster to select Service Monitors to work with
+    ## ref: https://github.com/coreos/prometheus-operator/blob/master/Documentation/api.md#prometheusspec
+    annotations: {}
+
+    # Retain the job and instance labels of the metrics pushed to the Pushgateway
+    # [Scraping Pushgateway](https://github.com/prometheus/pushgateway#configure-the-pushgateway-as-a-target-to-scrape)
+    honorLabels: true
+
+    ## Metric relabel configs to apply to samples before ingestion.
+    ## [Metric Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#metric_relabel_configs)
+    metricRelabelings: []
+    # - action: keep
+    #   regex: 'kube_(daemonset|deployment|pod|namespace|node|statefulset).+'
+    #   sourceLabels: [__name__]
+
+    ## Relabel configs to apply to samples before ingestion.
+    ## [Relabeling](https://prometheus.io/docs/prometheus/latest/configuration/configuration/#relabel_config)
+    relabelings: []
+    # - sourceLabels: [__meta_kubernetes_pod_node_name]
+    #   separator: ;
+    #   regex: ^(.*)$
+    #   targetLabel: nodename
+    #   replacement: $1
+    #   action: replace
+
+    podTargetLabels: []
+
+  podDisruptionBudget:
+    enabled: false
+    # Set the minimum available replicas
+    # minAvailable: 1

deployments/kubernetes/manifests/clusterrole.yaml

@@ -1,7 +1,7 @@
 ---
 # Source: reloader/templates/clusterrole.yaml
+apiVersion: rbac.authorization.k8s.io/v1
 
-apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: ClusterRole
 metadata:
   annotations:
@@ -9,10 +9,10 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
   name: reloader-reloader-role
   namespace: default
 rules:
@@ -46,4 +46,10 @@ rules:
       - get
       - update
       - patch
-
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch

deployments/kubernetes/manifests/clusterrolebinding.yaml

@@ -1,7 +1,7 @@
 ---
 # Source: reloader/templates/clusterrolebinding.yaml
+apiVersion: rbac.authorization.k8s.io/v1
 
-apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: ClusterRoleBinding
 metadata:
   annotations:
@@ -9,10 +9,10 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
   name: reloader-reloader-role-binding
   namespace: default
 roleRef:
@@ -23,4 +23,3 @@ subjects:
   - kind: ServiceAccount
     name: reloader-reloader
     namespace: default
-

deployments/kubernetes/manifests/deployment.yaml

@@ -8,15 +8,15 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
     group: com.stakater.platform
     provider: stakater
-    version: v0.0.77
-    
+    version: v1.0.8
   name: reloader-reloader
+  namespace: default
 spec:
   replicas: 1
   revisionHistoryLimit: 2
@@ -28,17 +28,16 @@ spec:
     metadata:
       labels:
         app: reloader-reloader
-        chart: "reloader-v0.0.77"
+        chart: "reloader-v1.0.8"
         release: "reloader"
-        heritage: "Tiller"
-        app.kubernetes.io/managed-by: "Tiller"
+        heritage: "Helm"
+        app.kubernetes.io/managed-by: "Helm"
         group: com.stakater.platform
         provider: stakater
-        version: v0.0.77
-        
+        version: v1.0.8
     spec:
       containers:
-      - image: "stakater/reloader:v0.0.77"
+      - image: "stakater/reloader:v1.0.8"
         imagePullPolicy: IfNotPresent
         name: reloader-reloader
 
@@ -47,15 +46,24 @@ spec:
           containerPort: 9090
         livenessProbe:
           httpGet:
-            path: /metrics
+            path: /live
             port: http
+          timeoutSeconds: 5
+          failureThreshold: 5
+          periodSeconds: 10
+          successThreshold: 1
         readinessProbe:
           httpGet:
             path: /metrics
             port: http
+          timeoutSeconds: 5
+          failureThreshold: 5
+          periodSeconds: 10
+          successThreshold: 1
+
+        securityContext:
+          {}
       securityContext: 
         runAsNonRoot: true
         runAsUser: 65534
-        
       serviceAccountName: reloader-reloader
-

deployments/kubernetes/manifests/podmonitor.yaml

@@ -0,0 +1,3 @@
+---
+# Source: reloader/templates/podmonitor.yaml
+

deployments/kubernetes/manifests/serviceaccount.yaml

@@ -1,6 +1,5 @@
 ---
 # Source: reloader/templates/serviceaccount.yaml
-
 apiVersion: v1
 kind: ServiceAccount
 metadata:
@@ -9,9 +8,9 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
   name: reloader-reloader
-
+  namespace: default

deployments/kubernetes/reloader.yaml

@@ -1,7 +1,23 @@
 ---
+# Source: reloader/templates/serviceaccount.yaml
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  annotations:
+    meta.helm.sh/release-namespace: "default"
+    meta.helm.sh/release-name: "reloader"
+  labels:
+    app: reloader-reloader
+    chart: "reloader-v1.0.8"
+    release: "reloader"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
+  name: reloader-reloader
+  namespace: default
+---
 # Source: reloader/templates/clusterrole.yaml
+apiVersion: rbac.authorization.k8s.io/v1
 
-apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: ClusterRole
 metadata:
   annotations:
@@ -9,10 +25,10 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
   name: reloader-reloader-role
   namespace: default
 rules:
@@ -46,11 +62,17 @@ rules:
       - get
       - update
       - patch
-
+  - apiGroups:
+      - ""
+    resources:
+      - events
+    verbs:
+      - create
+      - patch
 ---
 # Source: reloader/templates/clusterrolebinding.yaml
+apiVersion: rbac.authorization.k8s.io/v1
 
-apiVersion: rbac.authorization.k8s.io/v1beta1
 kind: ClusterRoleBinding
 metadata:
   annotations:
@@ -58,10 +80,10 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
   name: reloader-reloader-role-binding
   namespace: default
 roleRef:
@@ -72,7 +94,6 @@ subjects:
   - kind: ServiceAccount
     name: reloader-reloader
     namespace: default
-
 ---
 # Source: reloader/templates/deployment.yaml
 apiVersion: apps/v1
@@ -83,15 +104,15 @@ metadata:
     meta.helm.sh/release-name: "reloader"
   labels:
     app: reloader-reloader
-    chart: "reloader-v0.0.77"
+    chart: "reloader-v1.0.8"
     release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
+    heritage: "Helm"
+    app.kubernetes.io/managed-by: "Helm"
     group: com.stakater.platform
     provider: stakater
-    version: v0.0.77
-    
+    version: v1.0.8
   name: reloader-reloader
+  namespace: default
 spec:
   replicas: 1
   revisionHistoryLimit: 2
@@ -103,17 +124,16 @@ spec:
     metadata:
       labels:
         app: reloader-reloader
-        chart: "reloader-v0.0.77"
+        chart: "reloader-v1.0.8"
         release: "reloader"
-        heritage: "Tiller"
-        app.kubernetes.io/managed-by: "Tiller"
+        heritage: "Helm"
+        app.kubernetes.io/managed-by: "Helm"
         group: com.stakater.platform
         provider: stakater
-        version: v0.0.77
-        
+        version: v1.0.8
     spec:
       containers:
-      - image: "stakater/reloader:v0.0.77"
+      - image: "stakater/reloader:v1.0.8"
         imagePullPolicy: IfNotPresent
         name: reloader-reloader
 
@@ -122,48 +142,24 @@ spec:
           containerPort: 9090
         livenessProbe:
           httpGet:
-            path: /metrics
+            path: /live
             port: http
+          timeoutSeconds: 5
+          failureThreshold: 5
+          periodSeconds: 10
+          successThreshold: 1
         readinessProbe:
           httpGet:
             path: /metrics
             port: http
+          timeoutSeconds: 5
+          failureThreshold: 5
+          periodSeconds: 10
+          successThreshold: 1
+
+        securityContext:
+          {}
       securityContext: 
         runAsNonRoot: true
         runAsUser: 65534
-        
       serviceAccountName: reloader-reloader
-
----
-# Source: reloader/templates/role.yaml
-
-
----
-# Source: reloader/templates/rolebinding.yaml
-
-
----
-# Source: reloader/templates/service.yaml
-
-
----
-# Source: reloader/templates/serviceaccount.yaml
-
-apiVersion: v1
-kind: ServiceAccount
-metadata:
-  annotations:
-    meta.helm.sh/release-namespace: "default"
-    meta.helm.sh/release-name: "reloader"
-  labels:
-    app: reloader-reloader
-    chart: "reloader-v0.0.77"
-    release: "reloader"
-    heritage: "Tiller"
-    app.kubernetes.io/managed-by: "Tiller"
-  name: reloader-reloader
-
----
-# Source: reloader/templates/servicemonitor.yaml
-
-

deployments/kubernetes/templates/chart/values.yaml.tmpl

@@ -13,6 +13,8 @@ reloader:
   isOpenshift: false
   ignoreSecrets: false
   ignoreConfigMaps: false
+  reloadOnCreate: false
+  reloadStrategy: default # Set to default, env-vars or annotations
   ignoreNamespaces: "" # Comma separated list of namespaces to ignore
   logFormat: "" #json
   watchGlobally: true
@@ -22,6 +24,7 @@ reloader:
     rbac: false
   matchLabels: {}
   deployment:
+    replicas: 1
     nodeSelector:
     # cloud.google.com/gke-nodepool: default-pool
 
@@ -40,6 +43,13 @@ reloader:
       runAsNonRoot: true
       runAsUser: 65534
 
+    containerSecurityContext: {}
+      # capabilities:
+      #   drop:
+      #     - ALL
+      # allowPrivilegeEscalation: false
+      # readOnlyRootFilesystem: true
+
     # A list of tolerations to be applied to the Deployment.
     # Example:
     #   tolerations:
@@ -114,3 +124,15 @@ reloader:
     # Set timeout for scrape
     # timeout: 10s
   
+
+  podMonitor:
+    # enabling this requires service to be enabled as well, or no endpoints will be found
+    enabled: false
+    # Set the namespace the podMonitor should be deployed
+    # namespace: monitoring
+    # Set how frequently Prometheus should scrape
+    # interval: 30s
+    # Set labels for the podMonitor, use this to define your scrape label for Prometheus Operator
+    # labels:
+    # Set timeout for scrape
+    # timeout: 10s

docs/Alerting.md

@@ -0,0 +1,12 @@
+# Alerting on Reload
+Reloader can alert when it triggers a rolling upgrade on Deployments or StatefulSets. Webhook notification alert would be sent to the configured webhook server with all the required information   
+
+#### Enabling the feature
+In-order to enable this feature, you need to update the reloader.env.secret section of values.yaml providing the information needed for alert. 
+<pre>      ALERT_ON_RELOAD: [ true/false ] Default: false 
+      ALERT_SINK: [ slack/webhook ] Default: webhook
+      ALERT_WEBHOOK_URL: Required if ALERT_ON_RELOAD is true
+      ALERT_ADDITIONAL_INFO: Any additional information to be added to alert
+
+#### Slack incoming-webhook creation docs
+https://api.slack.com/messaging/webhooks 

go.mod

@@ -1,26 +1,91 @@
 module github.com/stakater/Reloader
 
-go 1.15
+go 1.20
 
 require (
-	github.com/argoproj/argo-rollouts v0.7.2
-	github.com/golang/groupcache v0.0.0-20191002201903-404acd9df4cc // indirect
-	github.com/onsi/ginkgo v1.15.1 // indirect
-	github.com/onsi/gomega v1.11.0 // indirect
-	github.com/openshift/api v3.9.1-0.20190923092516-169848dd8137+incompatible
-	github.com/openshift/client-go v0.0.0-20190923092832-6afefc9bb372
-	github.com/prometheus/client_golang v1.9.0
-	github.com/sirupsen/logrus v1.6.0
-	github.com/spf13/cobra v1.1.3
-	k8s.io/api v0.0.0-20190918155943-95b840bb6a1f
-	k8s.io/apimachinery v0.0.0-20191004115801-a2eda9f80ab8
-	k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90
+	github.com/argoproj/argo-rollouts v1.4.0
+	github.com/openshift/api v0.0.0-20210527122704-efd9d5958e01
+	github.com/openshift/client-go v0.0.0-20210521082421-73d9475a9142
+	github.com/parnurzeal/gorequest v0.2.16
+	github.com/prometheus/client_golang v1.14.0
+	github.com/sirupsen/logrus v1.9.0
+	github.com/spf13/cobra v1.6.1
+	k8s.io/api v0.26.1
+	k8s.io/apimachinery v0.26.1
+	k8s.io/client-go v0.26.1
+	k8s.io/kubectl v0.26.1
 )
 
-replace (
-	github.com/openshift/api => github.com/openshift/api v3.9.1-0.20190923092516-169848dd8137+incompatible // prebase-1.16
-	github.com/openshift/client-go => github.com/openshift/client-go v0.0.0-20190923092832-6afefc9bb372 // prebase-1.16
-	k8s.io/api => k8s.io/api v0.0.0-20191004120104-195af9ec3521 // release-1.16
-	k8s.io/apimachinery => k8s.io/apimachinery v0.0.0-20191004115801-a2eda9f80ab8 // kubernetes-1.16.0
-	k8s.io/client-go => k8s.io/client-go v0.0.0-20190918160344-1fbdaa4c8d90 // kubernetes-1.16.0
+require (
+	github.com/beorn7/perks v1.0.1 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/davecgh/go-spew v1.1.1 // indirect
+	github.com/emicklei/go-restful/v3 v3.10.1 // indirect
+	github.com/evanphx/json-patch v5.6.0+incompatible // indirect
+	github.com/go-logr/logr v1.2.3 // indirect
+	github.com/go-openapi/jsonpointer v0.19.6 // indirect
+	github.com/go-openapi/jsonreference v0.20.2 // indirect
+	github.com/go-openapi/swag v0.22.3 // indirect
+	github.com/gogo/protobuf v1.3.2 // indirect
+	github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect
+	github.com/golang/protobuf v1.5.2 // indirect
+	github.com/google/gnostic v0.6.9 // indirect
+	github.com/google/go-cmp v0.5.9 // indirect
+	github.com/google/gofuzz v1.2.0 // indirect
+	github.com/imdario/mergo v0.3.13 // indirect
+	github.com/inconshreveable/mousetrap v1.1.0 // indirect
+	github.com/josharian/intern v1.0.0 // indirect
+	github.com/json-iterator/go v1.1.12 // indirect
+	github.com/mailru/easyjson v0.7.7 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/modern-go/concurrent v0.0.0-20180306012644-bacd9c7ef1dd // indirect
+	github.com/modern-go/reflect2 v1.0.2 // indirect
+	github.com/munnerz/goautoneg v0.0.0-20191010083416-a7dc8b61c822 // indirect
+	github.com/pkg/errors v0.9.1 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.39.0 // indirect
+	github.com/prometheus/procfs v0.9.0 // indirect
+	github.com/smartystreets/goconvey v1.7.2 // indirect
+	github.com/spf13/pflag v1.0.5 // indirect
+	golang.org/x/net v0.7.0 // indirect
+	golang.org/x/oauth2 v0.4.0 // indirect
+	golang.org/x/sys v0.5.0 // indirect
+	golang.org/x/term v0.5.0 // indirect
+	golang.org/x/text v0.7.0 // indirect
+	golang.org/x/time v0.3.0 // indirect
+	google.golang.org/appengine v1.6.7 // indirect
+	google.golang.org/protobuf v1.28.1 // indirect
+	gopkg.in/inf.v0 v0.9.1 // indirect
+	gopkg.in/yaml.v2 v2.4.0 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
+	k8s.io/klog/v2 v2.80.1 // indirect
+	k8s.io/kube-openapi v0.0.0-20230202010329-39b3636cbaa3 // indirect
+	k8s.io/utils v0.0.0-20230202215443-34013725500c // indirect
+	moul.io/http2curl v1.0.0 // indirect
+	sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd // indirect
+	sigs.k8s.io/structured-merge-diff/v4 v4.2.3 // indirect
+	sigs.k8s.io/yaml v1.3.0 // indirect
+)
+
+// Replacements for argo-rollouts
+replace (
+	github.com/go-check/check => github.com/go-check/check v0.0.0-20180628173108-788fd7840127
+	k8s.io/api v0.0.0 => k8s.io/api v0.26.1
+	k8s.io/apimachinery v0.0.0 => k8s.io/apimachinery v0.26.1
+	k8s.io/client-go v0.0.0 => k8s.io/client-go v0.26.1
+	k8s.io/cloud-provider v0.0.0 => k8s.io/cloud-provider v0.24.2
+	k8s.io/controller-manager v0.0.0 => k8s.io/controller-manager v0.24.2
+	k8s.io/cri-api v0.0.0 => k8s.io/cri-api v0.20.5-rc.0
+	k8s.io/csi-translation-lib v0.0.0 => k8s.io/csi-translation-lib v0.24.2
+	k8s.io/kube-aggregator v0.0.0 => k8s.io/kube-aggregator v0.24.2
+	k8s.io/kube-controller-manager v0.0.0 => k8s.io/kube-controller-manager v0.24.2
+	k8s.io/kube-proxy v0.0.0 => k8s.io/kube-proxy v0.24.2
+	k8s.io/kube-scheduler v0.0.0 => k8s.io/kube-scheduler v0.24.2
+	k8s.io/kubectl v0.0.0 => k8s.io/kubectl v0.26.1
+	k8s.io/kubelet v0.0.0 => k8s.io/kubelet v0.24.2
+	k8s.io/legacy-cloud-providers v0.0.0 => k8s.io/legacy-cloud-providers v0.24.2
+	k8s.io/mount-utils v0.0.0 => k8s.io/mount-utils v0.20.5-rc.0
+	k8s.io/sample-apiserver v0.0.0 => k8s.io/sample-apiserver v0.24.2
+	k8s.io/sample-cli-plugin v0.0.0 => k8s.io/sample-cli-plugin v0.24.2
+	k8s.io/sample-controller v0.0.0 => k8s.io/sample-controller v0.24.2
 )

go.sum

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+rsc.io/sampler v1.3.0/go.mod h1:T1hPZKmBbMNahiBKFy5HrXp6adAjACjK9JXDnKaTXpA=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd h1:EDPBXCAspyGV4jQlpZSudPeMmr1bNJefnuqLsRAsHZo=
+sigs.k8s.io/json v0.0.0-20221116044647-bc3834ca7abd/go.mod h1:B8JuhiUyNFVKdsE8h686QcCxMaH6HrOAZj4vswFpcB0=
+sigs.k8s.io/structured-merge-diff/v4 v4.0.2/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/structured-merge-diff/v4 v4.1.0/go.mod h1:bJZC9H9iH24zzfZ/41RGcq60oK1F7G282QMXDPYydCw=
+sigs.k8s.io/structured-merge-diff/v4 v4.2.3 h1:PRbqxJClWWYMNV1dhaG4NsibJbArud9kFxnAMREiWFE=
+sigs.k8s.io/structured-merge-diff/v4 v4.2.3/go.mod h1:qjx8mGObPmV2aSZepjQjbmb2ihdVs8cGKBraizNC69E=
+sigs.k8s.io/yaml v1.2.0/go.mod h1:yfXDCHCao9+ENCvLSE62v9VSji2MKu5jeNfTrofGhJc=
+sigs.k8s.io/yaml v1.3.0 h1:a2VclLzOGrwOHDiV8EfBGhvjHvP46CtW5j6POvhYGGo=
+sigs.k8s.io/yaml v1.3.0/go.mod h1:GeOyir5tyXNByN85N/dRIT9es5UQNerPYEKK56eTBm8=

internal/pkg/alerts/alert.go

@@ -0,0 +1,94 @@
+package alert
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/parnurzeal/gorequest"
+	"github.com/sirupsen/logrus"
+)
+
+// function to send alert msg to webhook service
+func SendWebhookAlert(msg string) {
+	webhook_url, ok := os.LookupEnv("ALERT_WEBHOOK_URL")
+	if !ok {
+		logrus.Error("ALERT_WEBHOOK_URL env variable not provided")
+		return
+	}
+	webhook_url = strings.TrimSpace(webhook_url)
+	alert_sink := os.Getenv("ALERT_SINK")
+	alert_sink = strings.ToLower(strings.TrimSpace(alert_sink))
+
+	// Provision to add Proxy to reach webhook server if required
+	webhook_proxy := os.Getenv("ALERT_WEBHOOK_PROXY")
+	webhook_proxy = strings.TrimSpace(webhook_proxy)
+
+	// Provision to add Additional information in the alert. e.g ClusterName
+	alert_additional_info, ok := os.LookupEnv("ALERT_ADDITIONAL_INFO")
+	if ok {
+		alert_additional_info = strings.TrimSpace(alert_additional_info)
+		msg = fmt.Sprintf("%s : %s", alert_additional_info, msg)
+	}
+
+	if alert_sink == "slack" {
+		sendSlackAlert(webhook_url, webhook_proxy, msg)
+	} else {
+		msg = strings.Replace(msg, "*", "", -1)
+		sendRawWebhookAlert(webhook_url, webhook_proxy, msg)
+	}
+}
+
+// function to handle server redirection
+func redirectPolicy(req gorequest.Request, via []gorequest.Request) error {
+	return fmt.Errorf("incorrect token (redirection)")
+}
+
+// function to send alert to slack
+func sendSlackAlert(webhookUrl string, proxy string, msg string) []error {
+	attachment := Attachment{
+		Text:       msg,
+		Color:      "good",
+		AuthorName: "Reloader",
+	}
+
+	payload := WebhookMessage{
+		Attachments: []Attachment{attachment},
+	}
+
+	request := gorequest.New().Proxy(proxy)
+	resp, _, err := request.
+		Post(webhookUrl).
+		RedirectPolicy(redirectPolicy).
+		Send(payload).
+		End()
+
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode >= 400 {
+		return []error{fmt.Errorf("error sending msg. status: %v", resp.Status)}
+	}
+
+	return nil
+}
+
+// function to send alert to webhook service as text
+func sendRawWebhookAlert(webhookUrl string, proxy string, msg string) []error {
+	request := gorequest.New().Proxy(proxy)
+	resp, _, err := request.
+		Post(webhookUrl).
+		Type("text").
+		RedirectPolicy(redirectPolicy).
+		Send(msg).
+		End()
+
+	if err != nil {
+		return err
+	}
+	if resp.StatusCode >= 400 {
+		return []error{fmt.Errorf("error sending msg. status: %v", resp.Status)}
+	}
+
+	return nil
+}

internal/pkg/alerts/slack_alert.go

@@ -0,0 +1,61 @@
+package alert
+
+type WebhookMessage struct {
+	Username        string       `json:"username,omitempty"`
+	IconEmoji       string       `json:"icon_emoji,omitempty"`
+	IconURL         string       `json:"icon_url,omitempty"`
+	Channel         string       `json:"channel,omitempty"`
+	ThreadTimestamp string       `json:"thread_ts,omitempty"`
+	Text            string       `json:"text,omitempty"`
+	Attachments     []Attachment `json:"attachments,omitempty"`
+	Parse           string       `json:"parse,omitempty"`
+	ResponseType    string       `json:"response_type,omitempty"`
+	ReplaceOriginal bool         `json:"replace_original,omitempty"`
+	DeleteOriginal  bool         `json:"delete_original,omitempty"`
+	ReplyBroadcast  bool         `json:"reply_broadcast,omitempty"`
+}
+
+type Attachment struct {
+	Color    string `json:"color,omitempty"`
+	Fallback string `json:"fallback,omitempty"`
+
+	CallbackID string `json:"callback_id,omitempty"`
+	ID         int    `json:"id,omitempty"`
+
+	AuthorID      string `json:"author_id,omitempty"`
+	AuthorName    string `json:"author_name,omitempty"`
+	AuthorSubname string `json:"author_subname,omitempty"`
+	AuthorLink    string `json:"author_link,omitempty"`
+	AuthorIcon    string `json:"author_icon,omitempty"`
+
+	Title     string `json:"title,omitempty"`
+	TitleLink string `json:"title_link,omitempty"`
+	Pretext   string `json:"pretext,omitempty"`
+	Text      string `json:"text,omitempty"`
+
+	ImageURL string `json:"image_url,omitempty"`
+	ThumbURL string `json:"thumb_url,omitempty"`
+
+	ServiceName string `json:"service_name,omitempty"`
+	ServiceIcon string `json:"service_icon,omitempty"`
+	FromURL     string `json:"from_url,omitempty"`
+	OriginalURL string `json:"original_url,omitempty"`
+
+	MarkdownIn []string `json:"mrkdwn_in,omitempty"`
+
+	Footer     string `json:"footer,omitempty"`
+	FooterIcon string `json:"footer_icon,omitempty"`
+}
+
+type Field struct {
+	Title string `json:"title"`
+	Value string `json:"value"`
+	Short bool   `json:"short"`
+}
+
+type Action struct {
+	Type  string `json:"type"`
+	Text  string `json:"text"`
+	Url   string `json:"url"`
+	Style string `json:"style"`
+}

internal/pkg/callbacks/rolling_upgrade.go

@@ -1,39 +1,41 @@
 package callbacks
 
 import (
+	"context"
+
 	"github.com/sirupsen/logrus"
-	"github.com/stakater/Reloader/internal/pkg/util"
 	"github.com/stakater/Reloader/pkg/kube"
 	appsv1 "k8s.io/api/apps/v1"
 	v1 "k8s.io/api/core/v1"
 	meta_v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime"
 
 	argorolloutv1alpha1 "github.com/argoproj/argo-rollouts/pkg/apis/rollouts/v1alpha1"
 	openshiftv1 "github.com/openshift/api/apps/v1"
 )
 
-//ItemsFunc is a generic function to return a specific resource array in given namespace
-type ItemsFunc func(kube.Clients, string) []interface{}
+// ItemsFunc is a generic function to return a specific resource array in given namespace
+type ItemsFunc func(kube.Clients, string) []runtime.Object
 
-//ContainersFunc is a generic func to return containers
-type ContainersFunc func(interface{}) []v1.Container
+// ContainersFunc is a generic func to return containers
+type ContainersFunc func(runtime.Object) []v1.Container
 
-//InitContainersFunc is a generic func to return containers
-type InitContainersFunc func(interface{}) []v1.Container
+// InitContainersFunc is a generic func to return containers
+type InitContainersFunc func(runtime.Object) []v1.Container
 
-//VolumesFunc is a generic func to return volumes
-type VolumesFunc func(interface{}) []v1.Volume
+// VolumesFunc is a generic func to return volumes
+type VolumesFunc func(runtime.Object) []v1.Volume
 
-//UpdateFunc performs the resource update
-type UpdateFunc func(kube.Clients, string, interface{}) error
+// UpdateFunc performs the resource update
+type UpdateFunc func(kube.Clients, string, runtime.Object) error
 
-//AnnotationsFunc is a generic func to return annotations
-type AnnotationsFunc func(interface{}) map[string]string
+// AnnotationsFunc is a generic func to return annotations
+type AnnotationsFunc func(runtime.Object) map[string]string
 
-//PodAnnotationsFunc is a generic func to return annotations
-type PodAnnotationsFunc func(interface{}) map[string]string
+// PodAnnotationsFunc is a generic func to return annotations
+type PodAnnotationsFunc func(runtime.Object) map[string]string
 
-//RollingUpgradeFuncs contains generic functions to perform rolling upgrade
+// RollingUpgradeFuncs contains generic functions to perform rolling upgrade
 type RollingUpgradeFuncs struct {
 	ItemsFunc          ItemsFunc
 	AnnotationsFunc    AnnotationsFunc
@@ -46,209 +48,260 @@ type RollingUpgradeFuncs struct {
 }
 
 // GetDeploymentItems returns the deployments in given namespace
-func GetDeploymentItems(clients kube.Clients, namespace string) []interface{} {
-	deployments, err := clients.KubernetesClient.AppsV1().Deployments(namespace).List(meta_v1.ListOptions{})
+func GetDeploymentItems(clients kube.Clients, namespace string) []runtime.Object {
+	deployments, err := clients.KubernetesClient.AppsV1().Deployments(namespace).List(context.TODO(), meta_v1.ListOptions{})
 	if err != nil {
 		logrus.Errorf("Failed to list deployments %v", err)
 	}
-	return util.InterfaceSlice(deployments.Items)
+
+	items := make([]runtime.Object, len(deployments.Items))
+	// Ensure we always have pod annotations to add to
+	for i, v := range deployments.Items {
+		if v.Spec.Template.ObjectMeta.Annotations == nil {
+			annotations := make(map[string]string)
+			deployments.Items[i].Spec.Template.ObjectMeta.Annotations = annotations
+		}
+		items[i] = &deployments.Items[i]
+	}
+
+	return items
 }
 
 // GetDaemonSetItems returns the daemonSets in given namespace
-func GetDaemonSetItems(clients kube.Clients, namespace string) []interface{} {
-	daemonSets, err := clients.KubernetesClient.AppsV1().DaemonSets(namespace).List(meta_v1.ListOptions{})
+func GetDaemonSetItems(clients kube.Clients, namespace string) []runtime.Object {
+	daemonSets, err := clients.KubernetesClient.AppsV1().DaemonSets(namespace).List(context.TODO(), meta_v1.ListOptions{})
 	if err != nil {
 		logrus.Errorf("Failed to list daemonSets %v", err)
 	}
-	return util.InterfaceSlice(daemonSets.Items)
+
+	items := make([]runtime.Object, len(daemonSets.Items))
+	// Ensure we always have pod annotations to add to
+	for i, v := range daemonSets.Items {
+		if v.Spec.Template.ObjectMeta.Annotations == nil {
+			daemonSets.Items[i].Spec.Template.ObjectMeta.Annotations = make(map[string]string)
+		}
+		items[i] = &daemonSets.Items[i]
+	}
+
+	return items
 }
 
 // GetStatefulSetItems returns the statefulSets in given namespace
-func GetStatefulSetItems(clients kube.Clients, namespace string) []interface{} {
-	statefulSets, err := clients.KubernetesClient.AppsV1().StatefulSets(namespace).List(meta_v1.ListOptions{})
+func GetStatefulSetItems(clients kube.Clients, namespace string) []runtime.Object {
+	statefulSets, err := clients.KubernetesClient.AppsV1().StatefulSets(namespace).List(context.TODO(), meta_v1.ListOptions{})
 	if err != nil {
 		logrus.Errorf("Failed to list statefulSets %v", err)
 	}
-	return util.InterfaceSlice(statefulSets.Items)
+
+	items := make([]runtime.Object, len(statefulSets.Items))
+	// Ensure we always have pod annotations to add to
+	for i, v := range statefulSets.Items {
+		if v.Spec.Template.ObjectMeta.Annotations == nil {
+			statefulSets.Items[i].Spec.Template.ObjectMeta.Annotations = make(map[string]string)
+		}
+		items[i] = &statefulSets.Items[i]
+	}
+
+	return items
 }
 
 // GetDeploymentConfigItems returns the deploymentConfigs in given namespace
-func GetDeploymentConfigItems(clients kube.Clients, namespace string) []interface{} {
-	deploymentConfigs, err := clients.OpenshiftAppsClient.AppsV1().DeploymentConfigs(namespace).List(meta_v1.ListOptions{})
+func GetDeploymentConfigItems(clients kube.Clients, namespace string) []runtime.Object {
+	deploymentConfigs, err := clients.OpenshiftAppsClient.AppsV1().DeploymentConfigs(namespace).List(context.TODO(), meta_v1.ListOptions{})
 	if err != nil {
 		logrus.Errorf("Failed to list deploymentConfigs %v", err)
 	}
-	return util.InterfaceSlice(deploymentConfigs.Items)
+
+	items := make([]runtime.Object, len(deploymentConfigs.Items))
+	// Ensure we always have pod annotations to add to
+	for i, v := range deploymentConfigs.Items {
+		if v.Spec.Template.ObjectMeta.Annotations == nil {
+			deploymentConfigs.Items[i].Spec.Template.ObjectMeta.Annotations = make(map[string]string)
+		}
+		items[i] = &deploymentConfigs.Items[i]
+	}
+
+	return items
 }
 
 // GetRolloutItems returns the rollouts in given namespace
-func GetRolloutItems(clients kube.Clients, namespace string) []interface{} {
-	rollouts, err := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).List(meta_v1.ListOptions{})
+func GetRolloutItems(clients kube.Clients, namespace string) []runtime.Object {
+	rollouts, err := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).List(context.TODO(), meta_v1.ListOptions{})
 	if err != nil {
 		logrus.Errorf("Failed to list Rollouts %v", err)
 	}
-	return util.InterfaceSlice(rollouts.Items)
+
+	items := make([]runtime.Object, len(rollouts.Items))
+	// Ensure we always have pod annotations to add to
+	for i, v := range rollouts.Items {
+		if v.Spec.Template.ObjectMeta.Annotations == nil {
+			rollouts.Items[i].Spec.Template.ObjectMeta.Annotations = make(map[string]string)
+		}
+		items[i] = &rollouts.Items[i]
+	}
+
+	return items
 }
 
 // GetDeploymentAnnotations returns the annotations of given deployment
-func GetDeploymentAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.Deployment).ObjectMeta.Annotations
+func GetDeploymentAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.Deployment).ObjectMeta.Annotations
 }
 
 // GetDaemonSetAnnotations returns the annotations of given daemonSet
-func GetDaemonSetAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.DaemonSet).ObjectMeta.Annotations
+func GetDaemonSetAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.DaemonSet).ObjectMeta.Annotations
 }
 
 // GetStatefulSetAnnotations returns the annotations of given statefulSet
-func GetStatefulSetAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.StatefulSet).ObjectMeta.Annotations
+func GetStatefulSetAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.StatefulSet).ObjectMeta.Annotations
 }
 
 // GetDeploymentConfigAnnotations returns the annotations of given deploymentConfig
-func GetDeploymentConfigAnnotations(item interface{}) map[string]string {
-	return item.(openshiftv1.DeploymentConfig).ObjectMeta.Annotations
+func GetDeploymentConfigAnnotations(item runtime.Object) map[string]string {
+	return item.(*openshiftv1.DeploymentConfig).ObjectMeta.Annotations
 }
 
 // GetRolloutAnnotations returns the annotations of given rollout
-func GetRolloutAnnotations(item interface{}) map[string]string {
-	return item.(argorolloutv1alpha1.Rollout).ObjectMeta.Annotations
+func GetRolloutAnnotations(item runtime.Object) map[string]string {
+	return item.(*argorolloutv1alpha1.Rollout).ObjectMeta.Annotations
 }
 
 // GetDeploymentPodAnnotations returns the pod's annotations of given deployment
-func GetDeploymentPodAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.Deployment).Spec.Template.ObjectMeta.Annotations
+func GetDeploymentPodAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.Deployment).Spec.Template.ObjectMeta.Annotations
 }
 
 // GetDaemonSetPodAnnotations returns the pod's annotations of given daemonSet
-func GetDaemonSetPodAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.DaemonSet).Spec.Template.ObjectMeta.Annotations
+func GetDaemonSetPodAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.DaemonSet).Spec.Template.ObjectMeta.Annotations
 }
 
 // GetStatefulSetPodAnnotations returns the pod's annotations of given statefulSet
-func GetStatefulSetPodAnnotations(item interface{}) map[string]string {
-	return item.(appsv1.StatefulSet).Spec.Template.ObjectMeta.Annotations
+func GetStatefulSetPodAnnotations(item runtime.Object) map[string]string {
+	return item.(*appsv1.StatefulSet).Spec.Template.ObjectMeta.Annotations
 }
 
 // GetDeploymentConfigPodAnnotations returns the pod's annotations of given deploymentConfig
-func GetDeploymentConfigPodAnnotations(item interface{}) map[string]string {
-	return item.(openshiftv1.DeploymentConfig).Spec.Template.ObjectMeta.Annotations
+func GetDeploymentConfigPodAnnotations(item runtime.Object) map[string]string {
+	return item.(*openshiftv1.DeploymentConfig).Spec.Template.ObjectMeta.Annotations
 }
 
 // GetRolloutPodAnnotations returns the pod's annotations of given rollout
-func GetRolloutPodAnnotations(item interface{}) map[string]string {
-	return item.(argorolloutv1alpha1.Rollout).Spec.Template.ObjectMeta.Annotations
+func GetRolloutPodAnnotations(item runtime.Object) map[string]string {
+	return item.(*argorolloutv1alpha1.Rollout).Spec.Template.ObjectMeta.Annotations
 }
 
 // GetDeploymentContainers returns the containers of given deployment
-func GetDeploymentContainers(item interface{}) []v1.Container {
-	return item.(appsv1.Deployment).Spec.Template.Spec.Containers
+func GetDeploymentContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.Deployment).Spec.Template.Spec.Containers
 }
 
 // GetDaemonSetContainers returns the containers of given daemonSet
-func GetDaemonSetContainers(item interface{}) []v1.Container {
-	return item.(appsv1.DaemonSet).Spec.Template.Spec.Containers
+func GetDaemonSetContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.DaemonSet).Spec.Template.Spec.Containers
 }
 
 // GetStatefulSetContainers returns the containers of given statefulSet
-func GetStatefulSetContainers(item interface{}) []v1.Container {
-	return item.(appsv1.StatefulSet).Spec.Template.Spec.Containers
+func GetStatefulSetContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.StatefulSet).Spec.Template.Spec.Containers
 }
 
 // GetDeploymentConfigContainers returns the containers of given deploymentConfig
-func GetDeploymentConfigContainers(item interface{}) []v1.Container {
-	return item.(openshiftv1.DeploymentConfig).Spec.Template.Spec.Containers
+func GetDeploymentConfigContainers(item runtime.Object) []v1.Container {
+	return item.(*openshiftv1.DeploymentConfig).Spec.Template.Spec.Containers
 }
 
 // GetRolloutContainers returns the containers of given rollout
-func GetRolloutContainers(item interface{}) []v1.Container {
-	return item.(argorolloutv1alpha1.Rollout).Spec.Template.Spec.Containers
+func GetRolloutContainers(item runtime.Object) []v1.Container {
+	return item.(*argorolloutv1alpha1.Rollout).Spec.Template.Spec.Containers
 }
 
 // GetDeploymentInitContainers returns the containers of given deployment
-func GetDeploymentInitContainers(item interface{}) []v1.Container {
-	return item.(appsv1.Deployment).Spec.Template.Spec.InitContainers
+func GetDeploymentInitContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.Deployment).Spec.Template.Spec.InitContainers
 }
 
 // GetDaemonSetInitContainers returns the containers of given daemonSet
-func GetDaemonSetInitContainers(item interface{}) []v1.Container {
-	return item.(appsv1.DaemonSet).Spec.Template.Spec.InitContainers
+func GetDaemonSetInitContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.DaemonSet).Spec.Template.Spec.InitContainers
 }
 
 // GetStatefulSetInitContainers returns the containers of given statefulSet
-func GetStatefulSetInitContainers(item interface{}) []v1.Container {
-	return item.(appsv1.StatefulSet).Spec.Template.Spec.InitContainers
+func GetStatefulSetInitContainers(item runtime.Object) []v1.Container {
+	return item.(*appsv1.StatefulSet).Spec.Template.Spec.InitContainers
 }
 
 // GetDeploymentConfigInitContainers returns the containers of given deploymentConfig
-func GetDeploymentConfigInitContainers(item interface{}) []v1.Container {
-	return item.(openshiftv1.DeploymentConfig).Spec.Template.Spec.InitContainers
+func GetDeploymentConfigInitContainers(item runtime.Object) []v1.Container {
+	return item.(*openshiftv1.DeploymentConfig).Spec.Template.Spec.InitContainers
 }
 
 // GetRolloutInitContainers returns the containers of given rollout
-func GetRolloutInitContainers(item interface{}) []v1.Container {
-	return item.(argorolloutv1alpha1.Rollout).Spec.Template.Spec.InitContainers
+func GetRolloutInitContainers(item runtime.Object) []v1.Container {
+	return item.(*argorolloutv1alpha1.Rollout).Spec.Template.Spec.InitContainers
 }
 
 // UpdateDeployment performs rolling upgrade on deployment
-func UpdateDeployment(clients kube.Clients, namespace string, resource interface{}) error {
-	deployment := resource.(appsv1.Deployment)
-	_, err := clients.KubernetesClient.AppsV1().Deployments(namespace).Update(&deployment)
+func UpdateDeployment(clients kube.Clients, namespace string, resource runtime.Object) error {
+	deployment := resource.(*appsv1.Deployment)
+	_, err := clients.KubernetesClient.AppsV1().Deployments(namespace).Update(context.TODO(), deployment, meta_v1.UpdateOptions{FieldManager: "Reloader"})
 	return err
 }
 
 // UpdateDaemonSet performs rolling upgrade on daemonSet
-func UpdateDaemonSet(clients kube.Clients, namespace string, resource interface{}) error {
-	daemonSet := resource.(appsv1.DaemonSet)
-	_, err := clients.KubernetesClient.AppsV1().DaemonSets(namespace).Update(&daemonSet)
+func UpdateDaemonSet(clients kube.Clients, namespace string, resource runtime.Object) error {
+	daemonSet := resource.(*appsv1.DaemonSet)
+	_, err := clients.KubernetesClient.AppsV1().DaemonSets(namespace).Update(context.TODO(), daemonSet, meta_v1.UpdateOptions{FieldManager: "Reloader"})
 	return err
 }
 
 // UpdateStatefulSet performs rolling upgrade on statefulSet
-func UpdateStatefulSet(clients kube.Clients, namespace string, resource interface{}) error {
-	statefulSet := resource.(appsv1.StatefulSet)
-	_, err := clients.KubernetesClient.AppsV1().StatefulSets(namespace).Update(&statefulSet)
+func UpdateStatefulSet(clients kube.Clients, namespace string, resource runtime.Object) error {
+	statefulSet := resource.(*appsv1.StatefulSet)
+	_, err := clients.KubernetesClient.AppsV1().StatefulSets(namespace).Update(context.TODO(), statefulSet, meta_v1.UpdateOptions{FieldManager: "Reloader"})
 	return err
 }
 
 // UpdateDeploymentConfig performs rolling upgrade on deploymentConfig
-func UpdateDeploymentConfig(clients kube.Clients, namespace string, resource interface{}) error {
-	deploymentConfig := resource.(openshiftv1.DeploymentConfig)
-	_, err := clients.OpenshiftAppsClient.AppsV1().DeploymentConfigs(namespace).Update(&deploymentConfig)
+func UpdateDeploymentConfig(clients kube.Clients, namespace string, resource runtime.Object) error {
+	deploymentConfig := resource.(*openshiftv1.DeploymentConfig)
+	_, err := clients.OpenshiftAppsClient.AppsV1().DeploymentConfigs(namespace).Update(context.TODO(), deploymentConfig, meta_v1.UpdateOptions{FieldManager: "Reloader"})
 	return err
 }
 
 // UpdateRollout performs rolling upgrade on rollout
-func UpdateRollout(clients kube.Clients, namespace string, resource interface{}) error {
-	rollout := resource.(argorolloutv1alpha1.Rollout)
-	rolloutBefore, _ := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).Get(rollout.Name, meta_v1.GetOptions{})
+func UpdateRollout(clients kube.Clients, namespace string, resource runtime.Object) error {
+	rollout := resource.(*argorolloutv1alpha1.Rollout)
+	rolloutBefore, _ := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).Get(context.TODO(), rollout.Name, meta_v1.GetOptions{})
 	logrus.Warnf("Before: %+v", rolloutBefore.Spec.Template.Spec.Containers[0].Env)
 	logrus.Warnf("After: %+v", rollout.Spec.Template.Spec.Containers[0].Env)
-	_, err := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).Update(&rollout)
+	_, err := clients.ArgoRolloutClient.ArgoprojV1alpha1().Rollouts(namespace).Update(context.TODO(), rollout, meta_v1.UpdateOptions{FieldManager: "Reloader"})
 	return err
 }
 
 // GetDeploymentVolumes returns the Volumes of given deployment
-func GetDeploymentVolumes(item interface{}) []v1.Volume {
-	return item.(appsv1.Deployment).Spec.Template.Spec.Volumes
+func GetDeploymentVolumes(item runtime.Object) []v1.Volume {
+	return item.(*appsv1.Deployment).Spec.Template.Spec.Volumes
 }
 
 // GetDaemonSetVolumes returns the Volumes of given daemonSet
-func GetDaemonSetVolumes(item interface{}) []v1.Volume {
-	return item.(appsv1.DaemonSet).Spec.Template.Spec.Volumes
+func GetDaemonSetVolumes(item runtime.Object) []v1.Volume {
+	return item.(*appsv1.DaemonSet).Spec.Template.Spec.Volumes
 }
 
 // GetStatefulSetVolumes returns the Volumes of given statefulSet
-func GetStatefulSetVolumes(item interface{}) []v1.Volume {
-	return item.(appsv1.StatefulSet).Spec.Template.Spec.Volumes
+func GetStatefulSetVolumes(item runtime.Object) []v1.Volume {
+	return item.(*appsv1.StatefulSet).Spec.Template.Spec.Volumes
 }
 
 // GetDeploymentConfigVolumes returns the Volumes of given deploymentConfig
-func GetDeploymentConfigVolumes(item interface{}) []v1.Volume {
-	return item.(openshiftv1.DeploymentConfig).Spec.Template.Spec.Volumes
+func GetDeploymentConfigVolumes(item runtime.Object) []v1.Volume {
+	return item.(*openshiftv1.DeploymentConfig).Spec.Template.Spec.Volumes
 }
 
 // GetRolloutVolumes returns the Volumes of given rollout
-func GetRolloutVolumes(item interface{}) []v1.Volume {
-	return item.(argorolloutv1alpha1.Rollout).Spec.Template.Spec.Volumes
+func GetRolloutVolumes(item runtime.Object) []v1.Volume {
+	return item.(*argorolloutv1alpha1.Rollout).Spec.Template.Spec.Volumes
 }

internal/pkg/cmd/reloader.go

@@ -1,9 +1,15 @@
 package cmd
 
 import (
+	"context"
 	"errors"
 	"fmt"
+	"net/http"
 	"os"
+	"strings"
+
+	"github.com/stakater/Reloader/internal/pkg/constants"
+	"github.com/stakater/Reloader/internal/pkg/leadership"
 
 	"github.com/sirupsen/logrus"
 	"github.com/spf13/cobra"
@@ -18,9 +24,10 @@ import (
 // NewReloaderCommand starts the reloader controller
 func NewReloaderCommand() *cobra.Command {
 	cmd := &cobra.Command{
-		Use:   "reloader",
-		Short: "A watcher for your Kubernetes cluster",
-		Run:   startReloader,
+		Use:     "reloader",
+		Short:   "A watcher for your Kubernetes cluster",
+		PreRunE: validateFlags,
+		Run:     startReloader,
 	}
 
 	// options
@@ -32,10 +39,40 @@ func NewReloaderCommand() *cobra.Command {
 	cmd.PersistentFlags().StringVar(&options.LogFormat, "log-format", "", "Log format to use (empty string for text, or JSON")
 	cmd.PersistentFlags().StringSlice("resources-to-ignore", []string{}, "list of resources to ignore (valid options 'configMaps' or 'secrets')")
 	cmd.PersistentFlags().StringSlice("namespaces-to-ignore", []string{}, "list of namespaces to ignore")
+	cmd.PersistentFlags().StringSlice("namespace-selector", []string{}, "list of key:vaule namespace labels to include")
 	cmd.PersistentFlags().StringVar(&options.IsArgoRollouts, "is-Argo-Rollouts", "false", "Add support for argo rollouts")
+	cmd.PersistentFlags().StringVar(&options.ReloadStrategy, constants.ReloadStrategyFlag, constants.EnvVarsReloadStrategy, "Specifies the desired reload strategy")
+	cmd.PersistentFlags().StringVar(&options.ReloadOnCreate, "reload-on-create", "false", "Add support to watch create events")
+	cmd.PersistentFlags().BoolVar(&options.EnableHA, "enable-ha", false, "Adds support for running multiple replicas via leadership election")
+
 	return cmd
 }
 
+func validateFlags(*cobra.Command, []string) error {
+	// Ensure the reload strategy is one of the following...
+	var validReloadStrategy bool
+	valid := []string{constants.EnvVarsReloadStrategy, constants.AnnotationsReloadStrategy}
+	for _, s := range valid {
+		if s == options.ReloadStrategy {
+			validReloadStrategy = true
+		}
+	}
+
+	if !validReloadStrategy {
+		err := fmt.Sprintf("%s must be one of: %s", constants.ReloadStrategyFlag, strings.Join(valid, ", "))
+		return errors.New(err)
+	}
+
+	// Validate that HA options are correct
+	if options.EnableHA {
+		if err := validateHAEnvs(); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
 func configureLogging(logFormat string) error {
 	switch logFormat {
 	case "json":
@@ -49,6 +86,25 @@ func configureLogging(logFormat string) error {
 	return nil
 }
 
+func validateHAEnvs() error {
+	podName, podNamespace := getHAEnvs()
+
+	if podName == "" {
+		return fmt.Errorf("%s not set, cannot run in HA mode without %s set", constants.PodNameEnv, constants.PodNameEnv)
+	}
+	if podNamespace == "" {
+		return fmt.Errorf("%s not set, cannot run in HA mode without %s set", constants.PodNamespaceEnv, constants.PodNamespaceEnv)
+	}
+	return nil
+}
+
+func getHAEnvs() (string, string) {
+	podName := os.Getenv(constants.PodNameEnv)
+	podNamespace := os.Getenv(constants.PodNamespaceEnv)
+
+	return podName, podNamespace
+}
+
 func startReloader(cmd *cobra.Command, args []string) {
 	err := configureLogging(options.LogFormat)
 	if err != nil {
@@ -78,18 +134,34 @@ func startReloader(cmd *cobra.Command, args []string) {
 		logrus.Fatal(err)
 	}
 
+	namespaceLabelSelector, err := getNamespaceLabelSelector(cmd)
+	if err != nil {
+		logrus.Fatal(err)
+	}
+
+	if len(namespaceLabelSelector) > 0 {
+		logrus.Warnf("namespace-selector is set, will detect changes in namespaces with these labels: %s.", namespaceLabelSelector)
+	}
+
 	collectors := metrics.SetupPrometheusEndpoint()
 
+	var controllers []*controller.Controller
 	for k := range kube.ResourceMap {
 		if ignoredResourcesList.Contains(k) {
 			continue
 		}
 
-		c, err := controller.NewController(clientset, k, currentNamespace, ignoredNamespacesList, collectors)
+		c, err := controller.NewController(clientset, k, currentNamespace, ignoredNamespacesList, namespaceLabelSelector, collectors)
 		if err != nil {
 			logrus.Fatalf("%s", err)
 		}
 
+		controllers = append(controllers, c)
+
+		// If HA is enabled we only run the controller when
+		if options.EnableHA {
+			continue
+		}
 		// Now let's start the controller
 		stop := make(chan struct{})
 		defer close(stop)
@@ -97,14 +169,38 @@ func startReloader(cmd *cobra.Command, args []string) {
 		go c.Run(1, stop)
 	}
 
-	// Wait forever
-	select {}
+	// Run leadership election
+	if options.EnableHA {
+		podName, podNamespace := getHAEnvs()
+		lock := leadership.GetNewLock(clientset.CoordinationV1(), constants.LockName, podName, podNamespace)
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+		go leadership.RunLeaderElection(lock, ctx, cancel, podName, controllers)
+	}
+
+	leadership.SetupLivenessEndpoint()
+	logrus.Fatal(http.ListenAndServe(constants.DefaultHttpListenAddr, nil))
 }
 
 func getIgnoredNamespacesList(cmd *cobra.Command) (util.List, error) {
 	return getStringSliceFromFlags(cmd, "namespaces-to-ignore")
 }
 
+func getNamespaceLabelSelector(cmd *cobra.Command) (util.Map, error) {
+	slice, err := getStringSliceFromFlags(cmd, "namespace-selector")
+	if err != nil {
+		logrus.Fatal(err)
+	}
+
+	var namespaceSelectorMap util.Map = make(util.Map)
+	for _, kv := range slice {
+		split := strings.Split(kv, ":")
+		namespaceSelectorMap[split[0]] = split[1]
+	}
+
+	return namespaceSelectorMap, nil
+}
+
 func getStringSliceFromFlags(cmd *cobra.Command, flag string) ([]string, error) {
 	slice, err := cmd.Flags().GetStringSlice(flag)
 	if err != nil {

internal/pkg/constants/constants.go

@@ -1,10 +1,32 @@
 package constants
 
 const (
+	// DefaultHttpListenAddr is the default listening address for global http server
+	DefaultHttpListenAddr = ":9090"
+
 	// ConfigmapEnvVarPostfix is a postfix for configmap envVar
 	ConfigmapEnvVarPostfix = "CONFIGMAP"
 	// SecretEnvVarPostfix is a postfix for secret envVar
 	SecretEnvVarPostfix = "SECRET"
 	// EnvVarPrefix is a Prefix for environment variable
 	EnvVarPrefix = "STAKATER_"
+
+	// ReloaderAnnotationPrefix is a Prefix for all reloader annotations
+	ReloaderAnnotationPrefix = "reloader.stakater.com"
+	// LastReloadedFromAnnotation is an annotation used to describe the last resource that triggered a reload
+	LastReloadedFromAnnotation = "last-reloaded-from"
+
+	// 	ReloadStrategyFlag The reload strategy flag name
+	ReloadStrategyFlag = "reload-strategy"
+	// EnvVarsReloadStrategy instructs Reloader to add container environment variables to facilitate a restart
+	EnvVarsReloadStrategy = "env-vars"
+	// AnnotationsReloadStrategy instructs Reloader to add pod template annotations to facilitate a restart
+	AnnotationsReloadStrategy = "annotations"
+)
+
+// Leadership election related consts
+const (
+	LockName        string = "stakater-reloader-lock"
+	PodNameEnv      string = "POD_NAME"
+	PodNamespaceEnv string = "POD_NAMESPACE"
 )

internal/pkg/controller/controller.go

@@ -1,22 +1,27 @@
 package controller
 
 import (
+	"context"
 	"fmt"
 	"time"
 
 	"github.com/sirupsen/logrus"
 	"github.com/stakater/Reloader/internal/pkg/handler"
 	"github.com/stakater/Reloader/internal/pkg/metrics"
+	"github.com/stakater/Reloader/internal/pkg/options"
 	"github.com/stakater/Reloader/internal/pkg/util"
 	"github.com/stakater/Reloader/pkg/kube"
+	v1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/fields"
 	"k8s.io/apimachinery/pkg/util/runtime"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/client-go/kubernetes"
+	typedcorev1 "k8s.io/client-go/kubernetes/typed/core/v1"
 	"k8s.io/client-go/tools/cache"
+	"k8s.io/client-go/tools/record"
 	"k8s.io/client-go/util/workqueue"
-
-	v1 "k8s.io/api/core/v1"
+	"k8s.io/kubectl/pkg/scheme"
 )
 
 // Controller for checking events
@@ -28,17 +33,28 @@ type Controller struct {
 	namespace         string
 	ignoredNamespaces util.List
 	collectors        metrics.Collectors
+	recorder          record.EventRecorder
+	namespaceSelector map[string]string
 }
 
+// controllerInitialized flag determines whether controlled is being initialized
+var controllerInitialized bool = false
+
 // NewController for initializing a Controller
 func NewController(
-	client kubernetes.Interface, resource string, namespace string, ignoredNamespaces []string, collectors metrics.Collectors) (*Controller, error) {
+	client kubernetes.Interface, resource string, namespace string, ignoredNamespaces []string, namespaceLabelSelector map[string]string, collectors metrics.Collectors) (*Controller, error) {
 
 	c := Controller{
 		client:            client,
 		namespace:         namespace,
 		ignoredNamespaces: ignoredNamespaces,
+		namespaceSelector: namespaceLabelSelector,
 	}
+	eventBroadcaster := record.NewBroadcaster()
+	eventBroadcaster.StartRecordingToSink(&typedcorev1.EventSinkImpl{
+		Interface: client.CoreV1().Events(""),
+	})
+	recorder := eventBroadcaster.NewRecorder(scheme.Scheme, v1.EventSource{Component: fmt.Sprintf("reloader-%s", resource)})
 
 	queue := workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter())
 	listWatcher := cache.NewListWatchFromClient(client.CoreV1().RESTClient(), resource, namespace, fields.Everything())
@@ -52,13 +68,23 @@ func NewController(
 	c.informer = informer
 	c.queue = queue
 	c.collectors = collectors
+	c.recorder = recorder
+
+	logrus.Infof("created controller for: %s", resource)
 	return &c, nil
 }
 
 // Add function to add a new object to the queue in case of creating a resource
 func (c *Controller) Add(obj interface{}) {
-	// Not required as reloader should update the resource in the event of any change and not in the event of any resource creation.
-	// This causes the issue where reloader reloads the pods when reloader itself gets restarted as it's queue is filled with all the k8s objects as new resources.
+	if options.ReloadOnCreate == "true" {
+		if !c.resourceInIgnoredNamespace(obj) && c.resourceInNamespaceSelector(obj) && controllerInitialized {
+			c.queue.Add(handler.ResourceCreatedHandler{
+				Resource:   obj,
+				Collectors: c.collectors,
+				Recorder:   c.recorder,
+			})
+		}
+	}
 }
 
 func (c *Controller) resourceInIgnoredNamespace(raw interface{}) bool {
@@ -71,13 +97,50 @@ func (c *Controller) resourceInIgnoredNamespace(raw interface{}) bool {
 	return false
 }
 
+func (c *Controller) resourceInNamespaceSelector(raw interface{}) bool {
+	if len(c.namespaceSelector) == 0 {
+		return true
+	}
+
+	switch object := raw.(type) {
+	case *v1.ConfigMap:
+		return c.matchLabels(object.ObjectMeta.Namespace)
+	case *v1.Secret:
+		return c.matchLabels(object.ObjectMeta.Namespace)
+	}
+	return true
+}
+
+func (c *Controller) matchLabels(resourceNamespace string) bool {
+	namespace, err := c.client.CoreV1().Namespaces().Get(context.Background(), resourceNamespace, metav1.GetOptions{})
+	if err != nil {
+		logrus.Warn(err)
+		return false
+	}
+
+	for selectorKey, selectorVal := range c.namespaceSelector {
+
+		namespaceLabelVal, namespaceLabelKeyExists := namespace.ObjectMeta.Labels[selectorKey]
+
+		if namespaceLabelKeyExists && selectorVal == "*" {
+			continue
+		}
+
+		if !namespaceLabelKeyExists || selectorVal != namespaceLabelVal {
+			return false
+		}
+	}
+	return true
+}
+
 // Update function to add an old object and a new object to the queue in case of updating a resource
 func (c *Controller) Update(old interface{}, new interface{}) {
-	if !c.resourceInIgnoredNamespace(new) {
+	if !c.resourceInIgnoredNamespace(new) && c.resourceInNamespaceSelector(new) {
 		c.queue.Add(handler.ResourceUpdatedHandler{
 			Resource:    new,
 			OldResource: old,
 			Collectors:  c.collectors,
+			Recorder:    c.recorder,
 		})
 	}
 }
@@ -87,7 +150,7 @@ func (c *Controller) Delete(old interface{}) {
 	// Todo: Any future delete event can be handled here
 }
 
-//Run function for controller which handles the queue
+// Run function for controller which handles the queue
 func (c *Controller) Run(threadiness int, stopCh chan struct{}) {
 	defer runtime.HandleCrash()
 
@@ -111,6 +174,9 @@ func (c *Controller) Run(threadiness int, stopCh chan struct{}) {
 }
 
 func (c *Controller) runWorker() {
+	// At this point the controller is fully initialized and we can start processing the resources
+	controllerInitialized = true
+
 	for c.processNextItem() {
 	}
 }
@@ -145,7 +211,7 @@ func (c *Controller) handleErr(err error, key interface{}) {
 
 	// This controller retries 5 times if something goes wrong. After that, it stops trying.
 	if c.queue.NumRequeues(key) < 5 {
-		logrus.Errorf("Error syncing events %v: %v", key, err)
+		logrus.Errorf("Error syncing events: %v", err)
 
 		// Re-enqueue the key rate limited. Based on the rate limiter on the
 		// queue and the re-enqueue history, the key will be processed later again.
@@ -156,5 +222,6 @@ func (c *Controller) handleErr(err error, key interface{}) {
 	c.queue.Forget(key)
 	// Report to an external entity that, even after several retries, we could not successfully process this key
 	runtime.HandleError(err)
-	logrus.Infof("Dropping the key %q out of the queue: %v", key, err)
+	logrus.Errorf("Dropping key out of the queue: %v", err)
+	logrus.Debugf("Dropping the key %q out of the queue: %v", key, err)
 }

internal/pkg/handler/create.go

@@ -5,12 +5,14 @@ import (
 	"github.com/stakater/Reloader/internal/pkg/metrics"
 	"github.com/stakater/Reloader/internal/pkg/util"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/tools/record"
 )
 
 // ResourceCreatedHandler contains new objects
 type ResourceCreatedHandler struct {
 	Resource   interface{}
 	Collectors metrics.Collectors
+	Recorder   record.EventRecorder
 }
 
 // Handle processes the newly created resource
@@ -20,7 +22,7 @@ func (r ResourceCreatedHandler) Handle() error {
 	} else {
 		config, _ := r.GetConfig()
 		// process resource based on its type
-		doRollingUpgrade(config, r.Collectors)
+		return doRollingUpgrade(config, r.Collectors, r.Recorder)
 	}
 	return nil
 }

internal/pkg/handler/update.go

@@ -5,6 +5,7 @@ import (
 	"github.com/stakater/Reloader/internal/pkg/metrics"
 	"github.com/stakater/Reloader/internal/pkg/util"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/client-go/tools/record"
 )
 
 // ResourceUpdatedHandler contains updated objects
@@ -12,6 +13,7 @@ type ResourceUpdatedHandler struct {
 	Resource    interface{}
 	OldResource interface{}
 	Collectors  metrics.Collectors
+	Recorder    record.EventRecorder
 }
 
 // Handle processes the updated resource
@@ -22,7 +24,7 @@ func (r ResourceUpdatedHandler) Handle() error {
 		config, oldSHAData := r.GetConfig()
 		if config.SHAValue != oldSHAData {
 			// process resource based on its type
-			doRollingUpgrade(config, r.Collectors)
+			return doRollingUpgrade(config, r.Collectors, r.Recorder)
 		}
 	}
 	return nil

internal/pkg/handler/upgrade.go

@@ -1,11 +1,17 @@
 package handler
 
 import (
+	"encoding/json"
+	"errors"
+	"fmt"
+	"os"
+	"regexp"
 	"strconv"
 	"strings"
 
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/sirupsen/logrus"
+	alert "github.com/stakater/Reloader/internal/pkg/alerts"
 	"github.com/stakater/Reloader/internal/pkg/callbacks"
 	"github.com/stakater/Reloader/internal/pkg/constants"
 	"github.com/stakater/Reloader/internal/pkg/metrics"
@@ -13,6 +19,9 @@ import (
 	"github.com/stakater/Reloader/internal/pkg/util"
 	"github.com/stakater/Reloader/pkg/kube"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/meta"
+	"k8s.io/apimachinery/pkg/runtime"
+	"k8s.io/client-go/tools/record"
 )
 
 // GetDeploymentRollingUpgradeFuncs returns all callback funcs for a deployment
@@ -85,34 +94,52 @@ func GetArgoRolloutRollingUpgradeFuncs() callbacks.RollingUpgradeFuncs {
 	}
 }
 
-func doRollingUpgrade(config util.Config, collectors metrics.Collectors) {
+func doRollingUpgrade(config util.Config, collectors metrics.Collectors, recorder record.EventRecorder) error {
 	clients := kube.GetClients()
 
-	rollingUpgrade(clients, config, GetDeploymentRollingUpgradeFuncs(), collectors)
-	rollingUpgrade(clients, config, GetDaemonSetRollingUpgradeFuncs(), collectors)
-	rollingUpgrade(clients, config, GetStatefulSetRollingUpgradeFuncs(), collectors)
+	err := rollingUpgrade(clients, config, GetDeploymentRollingUpgradeFuncs(), collectors, recorder)
+	if err != nil {
+		return err
+	}
+	err = rollingUpgrade(clients, config, GetDaemonSetRollingUpgradeFuncs(), collectors, recorder)
+	if err != nil {
+		return err
+	}
+	err = rollingUpgrade(clients, config, GetStatefulSetRollingUpgradeFuncs(), collectors, recorder)
+	if err != nil {
+		return err
+	}
 
 	if kube.IsOpenshift {
-		rollingUpgrade(clients, config, GetDeploymentConfigRollingUpgradeFuncs(), collectors)
+		err = rollingUpgrade(clients, config, GetDeploymentConfigRollingUpgradeFuncs(), collectors, recorder)
+		if err != nil {
+			return err
+		}
 	}
 
 	if options.IsArgoRollouts == "true" {
-		rollingUpgrade(clients, config, GetArgoRolloutRollingUpgradeFuncs(), collectors)
+		err = rollingUpgrade(clients, config, GetArgoRolloutRollingUpgradeFuncs(), collectors, recorder)
+		if err != nil {
+			return err
+		}
 	}
+
+	return nil
 }
 
-func rollingUpgrade(clients kube.Clients, config util.Config, upgradeFuncs callbacks.RollingUpgradeFuncs, collectors metrics.Collectors) {
+func rollingUpgrade(clients kube.Clients, config util.Config, upgradeFuncs callbacks.RollingUpgradeFuncs, collectors metrics.Collectors, recorder record.EventRecorder) error {
 
-	err := PerformRollingUpgrade(clients, config, upgradeFuncs, collectors)
+	err := PerformRollingUpgrade(clients, config, upgradeFuncs, collectors, recorder)
 	if err != nil {
 		logrus.Errorf("Rolling upgrade for '%s' failed with error = %v", config.ResourceName, err)
 	}
+	return err
 }
 
 // PerformRollingUpgrade upgrades the deployment if there is any change in configmap or secret data
-func PerformRollingUpgrade(clients kube.Clients, config util.Config, upgradeFuncs callbacks.RollingUpgradeFuncs, collectors metrics.Collectors) error {
+func PerformRollingUpgrade(clients kube.Clients, config util.Config, upgradeFuncs callbacks.RollingUpgradeFuncs, collectors metrics.Collectors, recorder record.EventRecorder) error {
 	items := upgradeFuncs.ItemsFunc(clients, config.Namespace)
-	var err error
+
 	for _, i := range items {
 		// find correct annotation and update the resource
 		annotations := upgradeFuncs.AnnotationsFunc(i)
@@ -128,15 +155,16 @@ func PerformRollingUpgrade(clients kube.Clients, config util.Config, upgradeFunc
 		result := constants.NotUpdated
 		reloaderEnabled, err := strconv.ParseBool(reloaderEnabledValue)
 		if err == nil && reloaderEnabled {
-			result = updateContainers(upgradeFuncs, i, config, true)
+			result = invokeReloadStrategy(upgradeFuncs, i, config, true)
 		}
 
 		if result != constants.Updated && annotationValue != "" {
 			values := strings.Split(annotationValue, ",")
 			for _, value := range values {
-				value = strings.Trim(value, " ")
-				if value == config.ResourceName {
-					result = updateContainers(upgradeFuncs, i, config, false)
+				value = strings.TrimSpace(value)
+				re := regexp.MustCompile("^" + value + "$")
+				if re.Match([]byte(config.ResourceName)) {
+					result = invokeReloadStrategy(upgradeFuncs, i, config, false)
 					if result == constants.Updated {
 						break
 					}
@@ -147,24 +175,44 @@ func PerformRollingUpgrade(clients kube.Clients, config util.Config, upgradeFunc
 		if result != constants.Updated && searchAnnotationValue == "true" {
 			matchAnnotationValue := config.ResourceAnnotations[options.SearchMatchAnnotation]
 			if matchAnnotationValue == "true" {
-				result = updateContainers(upgradeFuncs, i, config, true)
+				result = invokeReloadStrategy(upgradeFuncs, i, config, true)
 			}
 		}
 
 		if result == constants.Updated {
-			err = upgradeFuncs.UpdateFunc(clients, config.Namespace, i)
-			resourceName := util.ToObjectMeta(i).Name
+			accessor, err := meta.Accessor(i)
 			if err != nil {
-				logrus.Errorf("Update for '%s' of type '%s' in namespace '%s' failed with error %v", resourceName, upgradeFuncs.ResourceType, config.Namespace, err)
+				return err
+			}
+			resourceName := accessor.GetName()
+			err = upgradeFuncs.UpdateFunc(clients, config.Namespace, i)
+			if err != nil {
+				message := fmt.Sprintf("Update for '%s' of type '%s' in namespace '%s' failed with error %v", resourceName, upgradeFuncs.ResourceType, config.Namespace, err)
+				logrus.Errorf(message)
 				collectors.Reloaded.With(prometheus.Labels{"success": "false"}).Inc()
+				if recorder != nil {
+					recorder.Event(i, v1.EventTypeWarning, "ReloadFail", message)
+				}
+				return err
 			} else {
-				logrus.Infof("Changes detected in '%s' of type '%s' in namespace '%s'", config.ResourceName, config.Type, config.Namespace)
-				logrus.Infof("Updated '%s' of type '%s' in namespace '%s'", resourceName, upgradeFuncs.ResourceType, config.Namespace)
+				message := fmt.Sprintf("Changes detected in '%s' of type '%s' in namespace '%s'", config.ResourceName, config.Type, config.Namespace)
+				message += fmt.Sprintf(", Updated '%s' of type '%s' in namespace '%s'", resourceName, upgradeFuncs.ResourceType, config.Namespace)
+				logrus.Infof(message)
 				collectors.Reloaded.With(prometheus.Labels{"success": "true"}).Inc()
+				alert_on_reload, ok := os.LookupEnv("ALERT_ON_RELOAD")
+				if recorder != nil {
+					recorder.Event(i, v1.EventTypeNormal, "Reloaded", message)
+				}
+				if ok && alert_on_reload == "true" {
+					msg := fmt.Sprintf(
+						"Reloader detected changes in *%s* of type *%s* in namespace *%s*. Hence reloaded *%s* of type *%s* in namespace *%s*",
+						config.ResourceName, config.Type, config.Namespace, resourceName, upgradeFuncs.ResourceType, config.Namespace)
+					alert.SendWebhookAlert(msg)
+				}
 			}
 		}
 	}
-	return err
+	return nil
 }
 
 func getVolumeMountName(volumes []v1.Volume, mountType string, volumeName string) string {
@@ -238,7 +286,7 @@ func getContainerWithEnvReference(containers []v1.Container, resourceName string
 	return nil
 }
 
-func getContainerToUpdate(upgradeFuncs callbacks.RollingUpgradeFuncs, item interface{}, config util.Config, autoReload bool) *v1.Container {
+func getContainerUsingResource(upgradeFuncs callbacks.RollingUpgradeFuncs, item runtime.Object, config util.Config, autoReload bool) *v1.Container {
 	volumes := upgradeFuncs.VolumesFunc(item)
 	containers := upgradeFuncs.ContainersFunc(item)
 	initContainers := upgradeFuncs.InitContainersFunc(item)
@@ -277,10 +325,70 @@ func getContainerToUpdate(upgradeFuncs callbacks.RollingUpgradeFuncs, item inter
 	return container
 }
 
-func updateContainers(upgradeFuncs callbacks.RollingUpgradeFuncs, item interface{}, config util.Config, autoReload bool) constants.Result {
+func invokeReloadStrategy(upgradeFuncs callbacks.RollingUpgradeFuncs, item runtime.Object, config util.Config, autoReload bool) constants.Result {
+	if options.ReloadStrategy == constants.AnnotationsReloadStrategy {
+		return updatePodAnnotations(upgradeFuncs, item, config, autoReload)
+	}
+
+	return updateContainerEnvVars(upgradeFuncs, item, config, autoReload)
+}
+
+func updatePodAnnotations(upgradeFuncs callbacks.RollingUpgradeFuncs, item runtime.Object, config util.Config, autoReload bool) constants.Result {
+	container := getContainerUsingResource(upgradeFuncs, item, config, autoReload)
+	if container == nil {
+		return constants.NoContainerFound
+	}
+
+	// Generate reloaded annotations. Attaching this to the item's annotation will trigger a rollout
+	// Note: the data on this struct is purely informational and is not used for future updates
+	reloadSource := util.NewReloadSourceFromConfig(config, []string{container.Name})
+	annotations, err := createReloadedAnnotations(&reloadSource)
+	if err != nil {
+		logrus.Errorf("Failed to create reloaded annotations for %s! error = %v", config.ResourceName, err)
+		return constants.NotUpdated
+	}
+
+	// Copy the all annotations to the item's annotations
+	pa := upgradeFuncs.PodAnnotationsFunc(item)
+	if pa == nil {
+		return constants.NotUpdated
+	}
+
+	for k, v := range annotations {
+		pa[k] = v
+	}
+
+	return constants.Updated
+}
+
+func createReloadedAnnotations(target *util.ReloadSource) (map[string]string, error) {
+	if target == nil {
+		return nil, errors.New("target is required")
+	}
+
+	// Create a single "last-invokeReloadStrategy-from" annotation that stores metadata about the
+	// resource that caused the last invokeReloadStrategy.
+	// Intentionally only storing the last item in order to keep
+	// the generated annotations as small as possible.
+	annotations := make(map[string]string)
+	lastReloadedResourceName := fmt.Sprintf("%s/%s",
+		constants.ReloaderAnnotationPrefix,
+		constants.LastReloadedFromAnnotation,
+	)
+
+	lastReloadedResource, err := json.Marshal(target)
+	if err != nil {
+		return nil, err
+	}
+
+	annotations[lastReloadedResourceName] = string(lastReloadedResource)
+	return annotations, nil
+}
+
+func updateContainerEnvVars(upgradeFuncs callbacks.RollingUpgradeFuncs, item runtime.Object, config util.Config, autoReload bool) constants.Result {
 	var result constants.Result
 	envVar := constants.EnvVarPrefix + util.ConvertToEnvVarName(config.ResourceName) + "_" + config.Type
-	container := getContainerToUpdate(upgradeFuncs, item, config, autoReload)
+	container := getContainerUsingResource(upgradeFuncs, item, config, autoReload)
 
 	if container == nil {
 		return constants.NoContainerFound

internal/pkg/leadership/leadership.go

@@ -0,0 +1,107 @@
+package leadership
+
+import (
+	"context"
+	"net/http"
+	"sync"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/stakater/Reloader/internal/pkg/controller"
+	v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/client-go/tools/leaderelection"
+	"k8s.io/client-go/tools/leaderelection/resourcelock"
+
+	coordinationv1 "k8s.io/client-go/kubernetes/typed/coordination/v1"
+)
+
+var (
+	// Used for liveness probe
+	m       sync.Mutex
+	healthy bool = true
+)
+
+func GetNewLock(client coordinationv1.CoordinationV1Interface, lockName, podname, namespace string) *resourcelock.LeaseLock {
+	return &resourcelock.LeaseLock{
+		LeaseMeta: v1.ObjectMeta{
+			Name:      lockName,
+			Namespace: namespace,
+		},
+		Client: client,
+		LockConfig: resourcelock.ResourceLockConfig{
+			Identity: podname,
+		},
+	}
+}
+
+// runLeaderElection runs leadership election. If an instance of the controller is the leader and stops leading it will shutdown.
+func RunLeaderElection(lock *resourcelock.LeaseLock, ctx context.Context, cancel context.CancelFunc, id string, controllers []*controller.Controller) {
+	// Construct channels for the controllers to use
+	var stopChannels []chan struct{}
+	for i := 0; i < len(controllers); i++ {
+		stop := make(chan struct{})
+		stopChannels = append(stopChannels, stop)
+	}
+
+	leaderelection.RunOrDie(ctx, leaderelection.LeaderElectionConfig{
+		Lock:            lock,
+		ReleaseOnCancel: true,
+		LeaseDuration:   15 * time.Second,
+		RenewDeadline:   10 * time.Second,
+		RetryPeriod:     2 * time.Second,
+		Callbacks: leaderelection.LeaderCallbacks{
+			OnStartedLeading: func(c context.Context) {
+				logrus.Info("became leader, starting controllers")
+				runControllers(controllers, stopChannels)
+			},
+			OnStoppedLeading: func() {
+				logrus.Info("no longer leader, shutting down")
+				stopControllers(stopChannels)
+				cancel()
+				m.Lock()
+				defer m.Unlock()
+				healthy = false
+			},
+			OnNewLeader: func(current_id string) {
+				if current_id == id {
+					logrus.Info("still the leader!")
+					return
+				}
+				logrus.Infof("new leader is %s", current_id)
+			},
+		},
+	})
+}
+
+func runControllers(controllers []*controller.Controller, stopChannels []chan struct{}) {
+	for i, c := range controllers {
+		c := c
+		go c.Run(1, stopChannels[i])
+	}
+}
+
+func stopControllers(stopChannels []chan struct{}) {
+	for _, c := range stopChannels {
+		close(c)
+	}
+}
+
+// Healthz sets up the liveness probe endpoint. If leadership election is
+// enabled and a replica stops leading the liveness probe will fail and the
+// kubelet will restart the container.
+func SetupLivenessEndpoint() {
+	http.HandleFunc("/live", healthz)
+}
+
+func healthz(w http.ResponseWriter, req *http.Request) {
+	m.Lock()
+	defer m.Unlock()
+	if healthy {
+		if i, err := w.Write([]byte("alive")); err != nil {
+			logrus.Infof("failed to write liveness response, wrote: %d bytes, got err: %s", i, err)
+		}
+		return
+	}
+
+	w.WriteHeader(http.StatusInternalServerError)
+}

internal/pkg/leadership/leadership_test.go

@@ -0,0 +1,213 @@
+package leadership
+
+import (
+	"context"
+	"fmt"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"testing"
+	"time"
+
+	"github.com/sirupsen/logrus"
+	"github.com/stakater/Reloader/internal/pkg/constants"
+	"github.com/stakater/Reloader/internal/pkg/controller"
+	"github.com/stakater/Reloader/internal/pkg/handler"
+	"github.com/stakater/Reloader/internal/pkg/metrics"
+	"github.com/stakater/Reloader/internal/pkg/options"
+	"github.com/stakater/Reloader/internal/pkg/testutil"
+	"github.com/stakater/Reloader/internal/pkg/util"
+	"github.com/stakater/Reloader/pkg/kube"
+)
+
+func TestMain(m *testing.M) {
+
+	testutil.CreateNamespace(testutil.Namespace, testutil.Clients.KubernetesClient)
+
+	logrus.Infof("Running Testcases")
+	retCode := m.Run()
+
+	testutil.DeleteNamespace(testutil.Namespace, testutil.Clients.KubernetesClient)
+
+	os.Exit(retCode)
+}
+
+func TestHealthz(t *testing.T) {
+	request, err := http.NewRequest(http.MethodGet, "/live", nil)
+	if err != nil {
+		t.Fatalf(("failed to create request"))
+	}
+
+	response := httptest.NewRecorder()
+
+	healthz(response, request)
+	got := response.Code
+	want := 200
+
+	if got != want {
+		t.Fatalf("got: %q, want: %q", got, want)
+	}
+
+	// Have the liveness probe serve a 500
+	healthy = false
+
+	request, err = http.NewRequest(http.MethodGet, "/live", nil)
+	if err != nil {
+		t.Fatalf(("failed to create request"))
+	}
+
+	response = httptest.NewRecorder()
+
+	healthz(response, request)
+	got = response.Code
+	want = 500
+
+	if got != want {
+		t.Fatalf("got: %q, want: %q", got, want)
+	}
+}
+
+// TestRunLeaderElection validates that the liveness endpoint serves 500 when
+// leadership election fails
+func TestRunLeaderElection(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.TODO())
+
+	lock := GetNewLock(testutil.Clients.KubernetesClient.CoordinationV1(), constants.LockName, testutil.Pod, testutil.Namespace)
+
+	go RunLeaderElection(lock, ctx, cancel, testutil.Pod, []*controller.Controller{})
+
+	// Liveness probe should be serving OK
+	request, err := http.NewRequest(http.MethodGet, "/live", nil)
+	if err != nil {
+		t.Fatalf(("failed to create request"))
+	}
+
+	response := httptest.NewRecorder()
+
+	healthz(response, request)
+	got := response.Code
+	want := 500
+
+	if got != want {
+		t.Fatalf("got: %q, want: %q", got, want)
+	}
+
+	// Cancel the leader election context, so leadership is released and
+	// live endpoint serves 500
+	cancel()
+
+	request, err = http.NewRequest(http.MethodGet, "/live", nil)
+	if err != nil {
+		t.Fatalf(("failed to create request"))
+	}
+
+	response = httptest.NewRecorder()
+
+	healthz(response, request)
+	got = response.Code
+	want = 500
+
+	if got != want {
+		t.Fatalf("got: %q, want: %q", got, want)
+	}
+}
+
+// TestRunLeaderElectionWithControllers tests that leadership election works
+// wiht real controllers and that on context cancellation the controllers stop
+// running.
+func TestRunLeaderElectionWithControllers(t *testing.T) {
+	t.Logf("Creating controller")
+	var controllers []*controller.Controller
+	for k := range kube.ResourceMap {
+		c, err := controller.NewController(testutil.Clients.KubernetesClient, k, testutil.Namespace, []string{}, map[string]string{}, metrics.NewCollectors())
+		if err != nil {
+			logrus.Fatalf("%s", err)
+		}
+
+		controllers = append(controllers, c)
+	}
+	time.Sleep(3 * time.Second)
+
+	lock := GetNewLock(testutil.Clients.KubernetesClient.CoordinationV1(), fmt.Sprintf("%s-%d", constants.LockName, 1), testutil.Pod, testutil.Namespace)
+
+	ctx, cancel := context.WithCancel(context.TODO())
+
+	// Start running leadership election, this also starts the controllers
+	go RunLeaderElection(lock, ctx, cancel, testutil.Pod, controllers)
+	time.Sleep(3 * time.Second)
+
+	// Create some stuff and do a thing
+	configmapName := testutil.ConfigmapNamePrefix + "-update-" + testutil.RandSeq(5)
+	configmapClient, err := testutil.CreateConfigMap(testutil.Clients.KubernetesClient, testutil.Namespace, configmapName, "www.google.com")
+	if err != nil {
+		t.Fatalf("Error while creating the configmap %v", err)
+	}
+
+	// Creating deployment
+	_, err = testutil.CreateDeployment(testutil.Clients.KubernetesClient, configmapName, testutil.Namespace, true)
+	if err != nil {
+		t.Fatalf("Error  in deployment creation: %v", err)
+	}
+
+	// Updating configmap for first time
+	updateErr := testutil.UpdateConfigMap(configmapClient, testutil.Namespace, configmapName, "", "www.stakater.com")
+	if updateErr != nil {
+		t.Fatalf("Configmap was not updated")
+	}
+	time.Sleep(3 * time.Second)
+
+	// Verifying deployment update
+	logrus.Infof("Verifying pod envvars has been created")
+	shaData := testutil.ConvertResourceToSHA(testutil.ConfigmapResourceType, testutil.Namespace, configmapName, "www.stakater.com")
+	config := util.Config{
+		Namespace:    testutil.Namespace,
+		ResourceName: configmapName,
+		SHAValue:     shaData,
+		Annotation:   options.ConfigmapUpdateOnChangeAnnotation,
+	}
+	deploymentFuncs := handler.GetDeploymentRollingUpgradeFuncs()
+	updated := testutil.VerifyResourceEnvVarUpdate(testutil.Clients, config, constants.ConfigmapEnvVarPostfix, deploymentFuncs)
+	if !updated {
+		t.Fatalf("Deployment was not updated")
+	}
+	time.Sleep(testutil.SleepDuration)
+
+	// Cancel the leader election context, so leadership is released
+	logrus.Info("shutting down controller from test")
+	cancel()
+	time.Sleep(5 * time.Second)
+
+	// Updating configmap again
+	updateErr = testutil.UpdateConfigMap(configmapClient, testutil.Namespace, configmapName, "", "www.stakater.com/new")
+	if updateErr != nil {
+		t.Fatalf("Configmap was not updated")
+	}
+
+	// Verifying that the deployment was not updated as leadership has been lost
+	logrus.Infof("Verifying pod envvars has not been updated")
+	shaData = testutil.ConvertResourceToSHA(testutil.ConfigmapResourceType, testutil.Namespace, configmapName, "www.stakater.com/new")
+	config = util.Config{
+		Namespace:    testutil.Namespace,
+		ResourceName: configmapName,
+		SHAValue:     shaData,
+		Annotation:   options.ConfigmapUpdateOnChangeAnnotation,
+	}
+	deploymentFuncs = handler.GetDeploymentRollingUpgradeFuncs()
+	updated = testutil.VerifyResourceEnvVarUpdate(testutil.Clients, config, constants.ConfigmapEnvVarPostfix, deploymentFuncs)
+	if updated {
+		t.Fatalf("Deployment was updated")
+	}
+
+	// Deleting deployment
+	err = testutil.DeleteDeployment(testutil.Clients.KubernetesClient, testutil.Namespace, configmapName)
+	if err != nil {
+		logrus.Errorf("Error while deleting the deployment %v", err)
+	}
+
+	// Deleting configmap
+	err = testutil.DeleteConfigMap(testutil.Clients.KubernetesClient, testutil.Namespace, configmapName)
+	if err != nil {
+		logrus.Errorf("Error while deleting the configmap %v", err)
+	}
+	time.Sleep(testutil.SleepDuration)
+}

internal/pkg/metrics/prometheus.go

@@ -3,7 +3,6 @@ package metrics
 import (
 	"github.com/prometheus/client_golang/prometheus"
 	"github.com/prometheus/client_golang/prometheus/promhttp"
-	"github.com/sirupsen/logrus"
 	"net/http"
 )
 
@@ -33,11 +32,7 @@ func NewCollectors() Collectors {
 func SetupPrometheusEndpoint() Collectors {
 	collectors := NewCollectors()
 	prometheus.MustRegister(collectors.Reloaded)
-
-	go func() {
-		http.Handle("/metrics", promhttp.Handler())
-		logrus.Fatal(http.ListenAndServe(":9090", nil))
-	}()
+	http.Handle("/metrics", promhttp.Handler())
 
 	return collectors
 }

internal/pkg/options/flags.go

@@ -1,5 +1,7 @@
 package options
 
+import "github.com/stakater/Reloader/internal/pkg/constants"
+
 var (
 	// ConfigmapUpdateOnChangeAnnotation is an annotation to detect changes in
 	// configmaps specified by name
@@ -17,6 +19,12 @@ var (
 	SearchMatchAnnotation = "reloader.stakater.com/match"
 	// LogFormat is the log format to use (json, or empty string for default)
 	LogFormat = ""
-	// Adds support for argo rollouts
+	// IsArgoRollouts Adds support for argo rollouts
 	IsArgoRollouts = "false"
+	// ReloadStrategy Specify the update strategy
+	ReloadStrategy = constants.EnvVarsReloadStrategy
+	// ReloadOnCreate Adds support to watch create events
+	ReloadOnCreate = "false"
+	// EnableHA adds support for running multiple replicas via leadership election
+	EnableHA = false
 )

internal/pkg/testutil/kube.go

@@ -1,6 +1,9 @@
 package testutil
 
 import (
+	"context"
+	"encoding/json"
+	"fmt"
 	"math/rand"
 	"sort"
 	"strconv"
@@ -13,11 +16,13 @@ import (
 	"github.com/stakater/Reloader/internal/pkg/callbacks"
 	"github.com/stakater/Reloader/internal/pkg/constants"
 	"github.com/stakater/Reloader/internal/pkg/crypto"
+	"github.com/stakater/Reloader/internal/pkg/metrics"
 	"github.com/stakater/Reloader/internal/pkg/options"
 	"github.com/stakater/Reloader/internal/pkg/util"
 	"github.com/stakater/Reloader/pkg/kube"
 	appsv1 "k8s.io/api/apps/v1"
 	v1 "k8s.io/api/core/v1"
+	"k8s.io/apimachinery/pkg/api/meta"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/client-go/kubernetes"
 	core_v1 "k8s.io/client-go/kubernetes/typed/core/v1"
@@ -31,9 +36,22 @@ var (
 	SecretResourceType = "secrets"
 )
 
+var (
+	Clients             = kube.GetClients()
+	Pod                 = "test-reloader-" + RandSeq(5)
+	Namespace           = "test-reloader-" + RandSeq(5)
+	ConfigmapNamePrefix = "testconfigmap-reloader"
+	SecretNamePrefix    = "testsecret-reloader"
+	Data                = "dGVzdFNlY3JldEVuY29kaW5nRm9yUmVsb2FkZXI="
+	NewData             = "dGVzdE5ld1NlY3JldEVuY29kaW5nRm9yUmVsb2FkZXI="
+	UpdatedData         = "dGVzdFVwZGF0ZWRTZWNyZXRFbmNvZGluZ0ZvclJlbG9hZGVy"
+	Collectors          = metrics.NewCollectors()
+	SleepDuration       = 3 * time.Second
+)
+
 // CreateNamespace creates namespace for testing
 func CreateNamespace(namespace string, client kubernetes.Interface) {
-	_, err := client.CoreV1().Namespaces().Create(&v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: namespace}})
+	_, err := client.CoreV1().Namespaces().Create(context.TODO(), &v1.Namespace{ObjectMeta: metav1.ObjectMeta{Name: namespace}}, metav1.CreateOptions{})
 	if err != nil {
 		logrus.Fatalf("Failed to create namespace for testing %v", err)
 	} else {
@@ -43,7 +61,7 @@ func CreateNamespace(namespace string, client kubernetes.Interface) {
 
 // DeleteNamespace deletes namespace for testing
 func DeleteNamespace(namespace string, client kubernetes.Interface) {
-	err := client.CoreV1().Namespaces().Delete(namespace, &metav1.DeleteOptions{})
+	err := client.CoreV1().Namespaces().Delete(context.TODO(), namespace, metav1.DeleteOptions{})
 	if err != nil {
 		logrus.Fatalf("Failed to delete namespace that was created for testing %v", err)
 	} else {
@@ -562,8 +580,8 @@ func GetSecretWithUpdatedLabel(namespace string, secretName string, label string
 	}
 }
 
-// GetResourceSHA returns the SHA value of given environment variable
-func GetResourceSHA(containers []v1.Container, envVar string) string {
+// GetResourceSHAFromEnvVar returns the SHA value of given environment variable
+func GetResourceSHAFromEnvVar(containers []v1.Container, envVar string) string {
 	for i := range containers {
 		envs := containers[i].Env
 		for j := range envs {
@@ -575,7 +593,29 @@ func GetResourceSHA(containers []v1.Container, envVar string) string {
 	return ""
 }
 
-//ConvertResourceToSHA generates SHA from secret or configmap data
+// GetResourceSHAFromAnnotation returns the SHA value of given environment variable
+func GetResourceSHAFromAnnotation(podAnnotations map[string]string) string {
+	lastReloadedResourceName := fmt.Sprintf("%s/%s",
+		constants.ReloaderAnnotationPrefix,
+		constants.LastReloadedFromAnnotation,
+	)
+
+	annotationJson, ok := podAnnotations[lastReloadedResourceName]
+	if !ok {
+		return ""
+	}
+
+	var last util.ReloadSource
+	bytes := []byte(annotationJson)
+	err := json.Unmarshal(bytes, &last)
+	if err != nil {
+		return ""
+	}
+
+	return last.Hash
+}
+
+// ConvertResourceToSHA generates SHA from secret or configmap data
 func ConvertResourceToSHA(resourceType string, namespace string, resourceName string, data string) string {
 	values := []string{}
 	if resourceType == SecretResourceType {
@@ -597,7 +637,7 @@ func ConvertResourceToSHA(resourceType string, namespace string, resourceName st
 func CreateConfigMap(client kubernetes.Interface, namespace string, configmapName string, data string) (core_v1.ConfigMapInterface, error) {
 	logrus.Infof("Creating configmap")
 	configmapClient := client.CoreV1().ConfigMaps(namespace)
-	_, err := configmapClient.Create(GetConfigmap(namespace, configmapName, data))
+	_, err := configmapClient.Create(context.TODO(), GetConfigmap(namespace, configmapName, data), metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return configmapClient, err
 }
@@ -606,7 +646,7 @@ func CreateConfigMap(client kubernetes.Interface, namespace string, configmapNam
 func CreateSecret(client kubernetes.Interface, namespace string, secretName string, data string) (core_v1.SecretInterface, error) {
 	logrus.Infof("Creating secret")
 	secretClient := client.CoreV1().Secrets(namespace)
-	_, err := secretClient.Create(GetSecret(namespace, secretName, data))
+	_, err := secretClient.Create(context.TODO(), GetSecret(namespace, secretName, data), metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return secretClient, err
 }
@@ -621,7 +661,7 @@ func CreateDeployment(client kubernetes.Interface, deploymentName string, namesp
 	} else {
 		deploymentObj = GetDeploymentWithEnvVars(namespace, deploymentName)
 	}
-	deployment, err := deploymentClient.Create(deploymentObj)
+	deployment, err := deploymentClient.Create(context.TODO(), deploymentObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return deployment, err
 }
@@ -636,7 +676,7 @@ func CreateDeploymentConfig(client appsclient.Interface, deploymentName string,
 	} else {
 		deploymentConfigObj = GetDeploymentConfigWithEnvVars(namespace, deploymentName)
 	}
-	deploymentConfig, err := deploymentConfigsClient.Create(deploymentConfigObj)
+	deploymentConfig, err := deploymentConfigsClient.Create(context.TODO(), deploymentConfigObj, metav1.CreateOptions{})
 	time.Sleep(5 * time.Second)
 	return deploymentConfig, err
 }
@@ -651,7 +691,7 @@ func CreateDeploymentWithInitContainer(client kubernetes.Interface, deploymentNa
 	} else {
 		deploymentObj = GetDeploymentWithInitContainerAndEnv(namespace, deploymentName)
 	}
-	deployment, err := deploymentClient.Create(deploymentObj)
+	deployment, err := deploymentClient.Create(context.TODO(), deploymentObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return deployment, err
 }
@@ -661,7 +701,7 @@ func CreateDeploymentWithEnvVarSource(client kubernetes.Interface, deploymentNam
 	logrus.Infof("Creating Deployment")
 	deploymentClient := client.AppsV1().Deployments(namespace)
 	deploymentObj := GetDeploymentWithEnvVarSources(namespace, deploymentName)
-	deployment, err := deploymentClient.Create(deploymentObj)
+	deployment, err := deploymentClient.Create(context.TODO(), deploymentObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return deployment, err
 
@@ -672,7 +712,7 @@ func CreateDeploymentWithPodAnnotations(client kubernetes.Interface, deploymentN
 	logrus.Infof("Creating Deployment")
 	deploymentClient := client.AppsV1().Deployments(namespace)
 	deploymentObj := GetDeploymentWithPodAnnotations(namespace, deploymentName, both)
-	deployment, err := deploymentClient.Create(deploymentObj)
+	deployment, err := deploymentClient.Create(context.TODO(), deploymentObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return deployment, err
 }
@@ -684,7 +724,7 @@ func CreateDeploymentWithEnvVarSourceAndAnnotations(client kubernetes.Interface,
 	deploymentClient := client.AppsV1().Deployments(namespace)
 	deploymentObj := GetDeploymentWithEnvVarSources(namespace, deploymentName)
 	deploymentObj.Annotations = annotations
-	deployment, err := deploymentClient.Create(deploymentObj)
+	deployment, err := deploymentClient.Create(context.TODO(), deploymentObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return deployment, err
 }
@@ -699,7 +739,7 @@ func CreateDaemonSet(client kubernetes.Interface, daemonsetName string, namespac
 	} else {
 		daemonsetObj = GetDaemonSetWithEnvVars(namespace, daemonsetName)
 	}
-	daemonset, err := daemonsetClient.Create(daemonsetObj)
+	daemonset, err := daemonsetClient.Create(context.TODO(), daemonsetObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return daemonset, err
 }
@@ -714,7 +754,7 @@ func CreateStatefulSet(client kubernetes.Interface, statefulsetName string, name
 	} else {
 		statefulsetObj = GetStatefulSetWithEnvVar(namespace, statefulsetName)
 	}
-	statefulset, err := statefulsetClient.Create(statefulsetObj)
+	statefulset, err := statefulsetClient.Create(context.TODO(), statefulsetObj, metav1.CreateOptions{})
 	time.Sleep(3 * time.Second)
 	return statefulset, err
 }
@@ -722,7 +762,7 @@ func CreateStatefulSet(client kubernetes.Interface, statefulsetName string, name
 // DeleteDeployment creates a deployment in given namespace and returns the error if any
 func DeleteDeployment(client kubernetes.Interface, namespace string, deploymentName string) error {
 	logrus.Infof("Deleting Deployment")
-	deploymentError := client.AppsV1().Deployments(namespace).Delete(deploymentName, &metav1.DeleteOptions{})
+	deploymentError := client.AppsV1().Deployments(namespace).Delete(context.TODO(), deploymentName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return deploymentError
 }
@@ -730,7 +770,7 @@ func DeleteDeployment(client kubernetes.Interface, namespace string, deploymentN
 // DeleteDeploymentConfig deletes a deploymentConfig in given namespace and returns the error if any
 func DeleteDeploymentConfig(client appsclient.Interface, namespace string, deploymentConfigName string) error {
 	logrus.Infof("Deleting DeploymentConfig")
-	deploymentConfigError := client.AppsV1().DeploymentConfigs(namespace).Delete(deploymentConfigName, &metav1.DeleteOptions{})
+	deploymentConfigError := client.AppsV1().DeploymentConfigs(namespace).Delete(context.TODO(), deploymentConfigName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return deploymentConfigError
 }
@@ -738,7 +778,7 @@ func DeleteDeploymentConfig(client appsclient.Interface, namespace string, deplo
 // DeleteDaemonSet creates a daemonset in given namespace and returns the error if any
 func DeleteDaemonSet(client kubernetes.Interface, namespace string, daemonsetName string) error {
 	logrus.Infof("Deleting DaemonSet %s", daemonsetName)
-	daemonsetError := client.AppsV1().DaemonSets(namespace).Delete(daemonsetName, &metav1.DeleteOptions{})
+	daemonsetError := client.AppsV1().DaemonSets(namespace).Delete(context.TODO(), daemonsetName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return daemonsetError
 }
@@ -746,7 +786,7 @@ func DeleteDaemonSet(client kubernetes.Interface, namespace string, daemonsetNam
 // DeleteStatefulSet creates a statefulset in given namespace and returns the error if any
 func DeleteStatefulSet(client kubernetes.Interface, namespace string, statefulsetName string) error {
 	logrus.Infof("Deleting StatefulSet %s", statefulsetName)
-	statefulsetError := client.AppsV1().StatefulSets(namespace).Delete(statefulsetName, &metav1.DeleteOptions{})
+	statefulsetError := client.AppsV1().StatefulSets(namespace).Delete(context.TODO(), statefulsetName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return statefulsetError
 }
@@ -760,7 +800,7 @@ func UpdateConfigMap(configmapClient core_v1.ConfigMapInterface, namespace strin
 	} else {
 		configmap = GetConfigmap(namespace, configmapName, data)
 	}
-	_, updateErr := configmapClient.Update(configmap)
+	_, updateErr := configmapClient.Update(context.TODO(), configmap, metav1.UpdateOptions{})
 	time.Sleep(3 * time.Second)
 	return updateErr
 }
@@ -774,7 +814,7 @@ func UpdateSecret(secretClient core_v1.SecretInterface, namespace string, secret
 	} else {
 		secret = GetSecret(namespace, secretName, data)
 	}
-	_, updateErr := secretClient.Update(secret)
+	_, updateErr := secretClient.Update(context.TODO(), secret, metav1.UpdateOptions{})
 	time.Sleep(3 * time.Second)
 	return updateErr
 }
@@ -782,7 +822,7 @@ func UpdateSecret(secretClient core_v1.SecretInterface, namespace string, secret
 // DeleteConfigMap deletes a configmap in given namespace and returns the error if any
 func DeleteConfigMap(client kubernetes.Interface, namespace string, configmapName string) error {
 	logrus.Infof("Deleting configmap %q.\n", configmapName)
-	err := client.CoreV1().ConfigMaps(namespace).Delete(configmapName, &metav1.DeleteOptions{})
+	err := client.CoreV1().ConfigMaps(namespace).Delete(context.TODO(), configmapName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return err
 }
@@ -790,14 +830,13 @@ func DeleteConfigMap(client kubernetes.Interface, namespace string, configmapNam
 // DeleteSecret deletes a secret in given namespace and returns the error if any
 func DeleteSecret(client kubernetes.Interface, namespace string, secretName string) error {
 	logrus.Infof("Deleting secret %q.\n", secretName)
-	err := client.CoreV1().Secrets(namespace).Delete(secretName, &metav1.DeleteOptions{})
+	err := client.CoreV1().Secrets(namespace).Delete(context.TODO(), secretName, metav1.DeleteOptions{})
 	time.Sleep(3 * time.Second)
 	return err
 }
 
 // RandSeq generates a random sequence
 func RandSeq(n int) string {
-	rand.Seed(time.Now().UnixNano())
 	b := make([]rune, n)
 	for i := range b {
 		b[i] = letters[rand.Intn(len(letters))]
@@ -805,15 +844,20 @@ func RandSeq(n int) string {
 	return string(b)
 }
 
-// VerifyResourceUpdate verifies whether the rolling upgrade happened or not
-func VerifyResourceUpdate(clients kube.Clients, config util.Config, envVarPostfix string, upgradeFuncs callbacks.RollingUpgradeFuncs) bool {
+// VerifyResourceEnvVarUpdate verifies whether the rolling upgrade happened or not
+func VerifyResourceEnvVarUpdate(clients kube.Clients, config util.Config, envVarPostfix string, upgradeFuncs callbacks.RollingUpgradeFuncs) bool {
 	items := upgradeFuncs.ItemsFunc(clients, config.Namespace)
 	for _, i := range items {
 		containers := upgradeFuncs.ContainersFunc(i)
+		accessor, err := meta.Accessor(i)
+		if err != nil {
+			return false
+		}
+		annotations := accessor.GetAnnotations()
 		// match statefulsets with the correct annotation
-		annotationValue := util.ToObjectMeta(i).Annotations[config.Annotation]
-		searchAnnotationValue := util.ToObjectMeta(i).Annotations[options.AutoSearchAnnotation]
-		reloaderEnabledValue := util.ToObjectMeta(i).Annotations[options.ReloaderAutoAnnotation]
+		annotationValue := annotations[config.Annotation]
+		searchAnnotationValue := annotations[options.AutoSearchAnnotation]
+		reloaderEnabledValue := annotations[options.ReloaderAutoAnnotation]
 		reloaderEnabled, err := strconv.ParseBool(reloaderEnabledValue)
 		matches := false
 		if err == nil && reloaderEnabled {
@@ -835,7 +879,50 @@ func VerifyResourceUpdate(clients kube.Clients, config util.Config, envVarPostfi
 
 		if matches {
 			envName := constants.EnvVarPrefix + util.ConvertToEnvVarName(config.ResourceName) + "_" + envVarPostfix
-			updated := GetResourceSHA(containers, envName)
+			updated := GetResourceSHAFromEnvVar(containers, envName)
+			if updated == config.SHAValue {
+				return true
+			}
+		}
+	}
+	return false
+}
+
+// VerifyResourceAnnotationUpdate verifies whether the rolling upgrade happened or not
+func VerifyResourceAnnotationUpdate(clients kube.Clients, config util.Config, upgradeFuncs callbacks.RollingUpgradeFuncs) bool {
+	items := upgradeFuncs.ItemsFunc(clients, config.Namespace)
+	for _, i := range items {
+		podAnnotations := upgradeFuncs.PodAnnotationsFunc(i)
+		accessor, err := meta.Accessor(i)
+		if err != nil {
+			return false
+		}
+		annotations := accessor.GetAnnotations()
+		// match statefulsets with the correct annotation
+		annotationValue := annotations[config.Annotation]
+		searchAnnotationValue := annotations[options.AutoSearchAnnotation]
+		reloaderEnabledValue := annotations[options.ReloaderAutoAnnotation]
+		reloaderEnabled, err := strconv.ParseBool(reloaderEnabledValue)
+		matches := false
+		if err == nil && reloaderEnabled {
+			matches = true
+		} else if annotationValue != "" {
+			values := strings.Split(annotationValue, ",")
+			for _, value := range values {
+				value = strings.Trim(value, " ")
+				if value == config.ResourceName {
+					matches = true
+					break
+				}
+			}
+		} else if searchAnnotationValue == "true" {
+			if config.ResourceAnnotations[options.SearchMatchAnnotation] == "true" {
+				matches = true
+			}
+		}
+
+		if matches {
+			updated := GetResourceSHAFromAnnotation(podAnnotations)
 			if updated == config.SHAValue {
 				return true
 			}

internal/pkg/util/reload_source.go

@@ -0,0 +1,39 @@
+package util
+
+import "time"
+
+type ReloadSource struct {
+	Type          string   `json:"type"`
+	Name          string   `json:"name"`
+	Namespace     string   `json:"namespace"`
+	Hash          string   `json:"hash"`
+	ContainerRefs []string `json:"containerRefs"`
+	ObservedAt    int64    `json:"observedAt"`
+}
+
+func NewReloadSource(
+	resourceName string,
+	resourceNamespace string,
+	resourceType string,
+	resourceHash string,
+	containerRefs []string,
+) ReloadSource {
+	return ReloadSource{
+		ObservedAt:    time.Now().Unix(),
+		Name:          resourceName,
+		Namespace:     resourceNamespace,
+		Type:          resourceType,
+		Hash:          resourceHash,
+		ContainerRefs: containerRefs,
+	}
+}
+
+func NewReloadSourceFromConfig(config Config, containerRefs []string) ReloadSource {
+	return NewReloadSource(
+		config.ResourceName,
+		config.Namespace,
+		config.Type,
+		config.SHAValue,
+		containerRefs,
+	)
+}

internal/pkg/util/util.go

@@ -54,6 +54,8 @@ func GetSHAfromSecret(data map[string][]byte) string {
 
 type List []string
 
+type Map map[string]string
+
 func (l *List) Contains(s string) bool {
 	for _, v := range *l {
 		if v == s {

okteto.yml

@@ -1,14 +1,17 @@
-name: reloader-reloader
-image: okteto/golang:1
-command: bash
-securityContext:
-  capabilities:
-    add:
-      - SYS_PTRACE
-volumes:
-  - /go/pkg/
-  - /root/.cache/go-build/
-sync:
-  - .:/app
-forward:
-  - 2345:2345
+dev:
+  reloader-reloader:
+    image: okteto/golang:1
+    command: bash
+    volumes:
+      - /go/pkg/
+      - /root/.cache/go-build/
+    sync:
+      - .:/app
+    forward:
+      - 2345:2345
+    workdir: /app
+    autocreate: true
+    securityContext:
+      capabilities:
+        add:
+          - SYS_PTRACE

pkg/kube/client.go

@@ -1,6 +1,7 @@
 package kube
 
 import (
+	"context"
 	"os"
 
 	"k8s.io/client-go/tools/clientcmd"
@@ -67,7 +68,7 @@ func isOpenshift() bool {
 	if err != nil {
 		logrus.Fatalf("Unable to create Kubernetes client error = %v", err)
 	}
-	_, err = client.RESTClient().Get().AbsPath("/apis/project.openshift.io").Do().Raw()
+	_, err = client.RESTClient().Get().AbsPath("/apis/project.openshift.io").Do(context.TODO()).Raw()
 	if err == nil {
 		logrus.Info("Environment: Openshift")
 		return true

stk.yaml

@@ -1,4 +0,0 @@
-issues:
-  kind: 1
-  url: https://aurorasolutions.atlassian.net
-  project: STK