Merge pull request #156 from stefanprodan/release-6.0.1

Release v6.0.1

.circleci/config.yml

@@ -1,5 +0,0 @@
-version: 2
-jobs:
-  build:
-    branches:
-      ignore: gh-pages

.github/actions/helm/action.yml

@@ -0,0 +1,33 @@
+name: Setup Helm CLI
+description: A GitHub Action for running Helm commands
+author: Stefan Prodan
+branding:
+  color: blue
+  icon: command
+inputs:
+  version:
+    description: "Helm version"
+    required: true
+runs:
+  using: composite
+  steps:
+    - name: "Download helm binary to tmp"
+      shell: bash
+      run: |
+        VERSION=${{ inputs.version }}
+        BIN_URL="https://get.helm.sh/helm-v${VERSION}-linux-amd64.tar.gz"
+        curl -sL ${BIN_URL} -o /tmp/helm.tar.gz
+        mkdir -p /tmp/helm
+        tar -C /tmp/helm/ -zxvf /tmp/helm.tar.gz
+    - name: "Add helm binary to /usr/local/bin"
+      shell: bash
+      run: |
+        sudo cp /tmp/helm/linux-amd64/helm /usr/local/bin
+    - name: "Cleanup tmp"
+      shell: bash
+      run: |
+        rm -rf /tmp/helm/ /tmp/helm.tar.gz
+    - name: "Verify correct installation of binary"
+      shell: bash
+      run: |
+        helm version

.github/actions/release-notes/Dockerfile

@@ -0,0 +1,6 @@
+FROM stefanprodan/alpine-base:latest
+
+COPY entrypoint.sh /entrypoint.sh
+RUN chmod +x /entrypoint.sh
+
+ENTRYPOINT ["/entrypoint.sh"]

.github/actions/release-notes/action.yml

@@ -0,0 +1,9 @@
+name: 'github-release-notes'
+description: 'A GitHub Action to run github-release-notes commands'
+author: 'Stefan Prodan'
+branding:
+  icon: 'command'
+  color: 'blue'
+runs:
+  using: 'docker'
+  image: 'Dockerfile'

.github/actions/release-notes/entrypoint.sh

@@ -0,0 +1,25 @@
+#!/usr/bin/env bash
+
+set -o errexit
+set -o pipefail
+
+VERSION=0.2.0
+BIN_DIR="$GITHUB_WORKSPACE/bin"
+
+main() {
+  mkdir -p ${BIN_DIR}
+  tmpDir=$(mktemp -d)
+
+  pushd $tmpDir >& /dev/null
+
+  curl -sSL https://github.com/buchanae/github-release-notes/releases/download/${VERSION}/github-release-notes-linux-amd64-${VERSION}.tar.gz | tar xz
+  cp github-release-notes ${BIN_DIR}/github-release-notes
+
+  popd >& /dev/null
+  rm -rf $tmpDir
+}
+
+main
+
+echo "$BIN_DIR" >> $GITHUB_PATH
+echo "$RUNNER_WORKSPACE/$(basename $GITHUB_REPOSITORY)/bin" >> $GITHUB_PATH

.github/policy/kubernetes.rego

@@ -0,0 +1,51 @@
+package kubernetes
+
+name = input.metadata.name
+
+kind = input.kind
+
+is_service {
+	input.kind = "Service"
+}
+
+is_deployment {
+	input.kind = "Deployment"
+}
+
+is_pod {
+	input.kind = "Pod"
+}
+
+split_image(image) = [image, "latest"] {
+	not contains(image, ":")
+}
+
+split_image(image) = [image_name, tag] {
+	[image_name, tag] = split(image, ":")
+}
+
+pod_containers(pod) = all_containers {
+	keys = {"containers", "initContainers"}
+	all_containers = [c | keys[k]; c = pod.spec[k][_]]
+}
+
+containers[container] {
+	pods[pod]
+	all_containers = pod_containers(pod)
+	container = all_containers[_]
+}
+
+containers[container] {
+	all_containers = pod_containers(input)
+	container = all_containers[_]
+}
+
+pods[pod] {
+	is_deployment
+	pod = input.spec.template
+}
+
+pods[pod] {
+	is_pod
+	pod = input
+}

.github/policy/rules.rego

@@ -0,0 +1,43 @@
+package main
+
+import data.kubernetes
+
+name = input.metadata.name
+
+# Deny containers with latest image tag
+deny[msg] {
+	kubernetes.containers[container]
+	[image_name, "latest"] = kubernetes.split_image(container.image)
+	msg = sprintf("%s in the %s %s has an image %s, using the latest tag", [container.name, kubernetes.kind, kubernetes.name, image_name])
+}
+
+# Deny services without app label selector
+service_labels {
+  input.spec.selector["app"]
+}
+deny[msg] {
+  kubernetes.is_service
+  not service_labels
+  msg = sprintf("Service %s should set app label selector", [name])
+}
+
+# Deny deployments without app label selector
+match_labels {
+  input.spec.selector.matchLabels["app"]
+}
+deny[msg] {
+  kubernetes.is_deployment
+  not match_labels
+  msg = sprintf("Service %s should set app label selector", [name])
+}
+
+# Warn if deployments have no prometheus pod annotations
+annotations {
+  input.spec.template.metadata.annotations["prometheus.io/scrape"]
+  input.spec.template.metadata.annotations["prometheus.io/port"]
+}
+warn[msg] {
+  kubernetes.is_deployment
+  not annotations
+  msg = sprintf("Deployment %s should set prometheus.io/scrape and prometheus.io/port pod annotations", [name])
+}

.github/workflows/cve-scan.yml

@@ -0,0 +1,23 @@
+name: cve-scan
+
+on:
+  push:
+    branches:
+      - 'master'
+
+jobs:
+  trivy:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Build image
+        id: build
+        run: |
+          IMAGE=test/podinfo:${GITHUB_SHA}
+          docker build -t ${IMAGE} .
+          echo "::set-output name=image::$IMAGE"
+      - name: Scan image
+        uses: docker://docker.io/aquasec/trivy:latest
+        with:
+          args: --cache-dir /var/lib/trivy --no-progress --exit-code 1 --severity MEDIUM,HIGH,CRITICAL ${{ steps.build.outputs.image }}

.github/workflows/e2e.yml

@@ -0,0 +1,38 @@
+name: e2e
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'master'
+
+jobs:
+  kind-helm:
+    strategy:
+      matrix:
+        helm-version:
+          - 3.6.0
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Setup Kubernetes
+        uses: engineerd/setup-kind@v0.5.0
+        with:
+          version: v0.11.1
+      - name: Build container image
+        run: |
+          ./test/build.sh
+          kind load docker-image test/podinfo:latest
+      - name: Setup Helm
+        uses: ./.github/actions/helm
+        with:
+          version: ${{ matrix.helm-version }}
+      - name: Deploy
+        run: ./test/deploy.sh
+      - name: Run integration tests
+        run: ./test/test.sh
+      - name: Debug failure
+        if: failure()
+        run: |
+          kubectl logs -l app=podinfo || true

.github/workflows/release.yml

@@ -0,0 +1,85 @@
+name: release
+
+on:
+  push:
+    tags: '*'
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - name: Setup QEMU
+        uses: docker/setup-qemu-action@v1
+        with:
+          platforms: all
+      - name: Setup Docker Buildx
+        id: buildx
+        uses: docker/setup-buildx-action@v1
+        with:
+          buildkitd-flags: "--debug"
+      - name: Login to GitHub Container Registry
+        uses: docker/login-action@v1
+        with:
+          registry: ghcr.io
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.GHCR_TOKEN }}
+      - name: Login to Docker Hub
+        uses: docker/login-action@v1
+        with:
+          username: ${{ secrets.DOCKER_USERNAME }}
+          password: ${{ secrets.DOCKER_PASSWORD }}
+      - name: Prepare
+        id: prep
+        run: |
+          VERSION=sha-${GITHUB_SHA::8}
+          if [[ $GITHUB_REF == refs/tags/* ]]; then
+            VERSION=${GITHUB_REF/refs\/tags\//}
+          fi
+          echo ::set-output name=BUILD_DATE::$(date -u +'%Y-%m-%dT%H:%M:%SZ')
+          echo ::set-output name=VERSION::${VERSION}
+      - name: Publish multi-arch image
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          file: ./Dockerfile
+          platforms: linux/amd64,linux/arm/v7,linux/arm64
+          tags: |
+            docker.io/stefanprodan/podinfo:${{ steps.prep.outputs.VERSION }}
+            docker.io/stefanprodan/podinfo:latest
+            ghcr.io/stefanprodan/podinfo:${{ steps.prep.outputs.VERSION }}
+          labels: |
+            org.opencontainers.image.title=${{ github.event.repository.name }}
+            org.opencontainers.image.description=${{ github.event.repository.description }}
+            org.opencontainers.image.source=${{ github.event.repository.html_url }}
+            org.opencontainers.image.url=${{ github.event.repository.html_url }}
+            org.opencontainers.image.revision=${{ github.sha }}
+            org.opencontainers.image.version=${{ steps.prep.outputs.VERSION }}
+            org.opencontainers.image.created=${{ steps.prep.outputs.BUILD_DATE }}
+      - name: Publish base image
+        uses: docker/build-push-action@v2
+        with:
+          push: true
+          builder: ${{ steps.buildx.outputs.name }}
+          context: .
+          platforms: linux/amd64
+          file: ./Dockerfile.base
+          tags: docker.io/stefanprodan/podinfo-base:latest
+      - name: Publish helm chart
+        uses: stefanprodan/helm-gh-pages@master
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}
+      - uses: ./.github/actions/release-notes
+      - name: Generate release notes
+        run: |
+          echo 'CHANGELOG' > /tmp/release.txt
+          github-release-notes -org stefanprodan -repo podinfo -since-latest-release >> /tmp/release.txt
+      - name: Publish release
+        uses: goreleaser/goreleaser-action@v1
+        with:
+          version: latest
+          args: release --release-notes=/tmp/release.txt
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/test.yml

@@ -0,0 +1,47 @@
+name: test
+
+on:
+  pull_request:
+  push:
+    branches:
+      - 'master'
+
+jobs:
+  test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+      - name: Restore Go cache
+        uses: actions/cache@v1
+        with:
+          path: ~/go/pkg/mod
+          key: ${{ runner.os }}-go-${{ hashFiles('**/go.sum') }}
+          restore-keys: ${{ runner.os }}-go-
+      - name: Setup Go
+        uses: actions/setup-go@v2
+        with:
+          go-version: 1.16.x
+      - name: Run unit tests
+        run: make test
+      - name: Check if working tree is dirty
+        run: |
+          if [[ $(git diff --stat) != '' ]]; then
+            echo 'run make test and commit changes'
+            exit 1
+          fi
+      - name: Validate Helm chart
+        uses: stefanprodan/kube-tools@v1
+        with:
+          kubectl: 1.19.11
+          helm: 2.17.0
+          helmv3: 3.6.0
+          command: |
+            helmv3 template ./charts/podinfo | kubeval --strict --kubernetes-version 1.19.11 --schema-location https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master
+      - name: Validate kustomization
+        uses: stefanprodan/kube-tools@v1
+        with:
+          kubectl: 1.19.11
+          command: |
+            kustomize build ./kustomize | kubeval --strict --kubernetes-version 1.19.11 --schema-location https://raw.githubusercontent.com/yannh/kubernetes-json-schema/master
+            kustomize build ./kustomize | conftest test -p .github/policy -

.gitignore

@@ -0,0 +1,22 @@
+# Binaries for programs and plugins
+*.exe
+*.dll
+*.so
+*.dylib
+
+# Test binary, build with `go test -c`
+*.test
+
+# Output of the go coverage tool, specifically when used with LiteIDE
+*.out
+
+.DS_Store
+
+# Project-local glide cache, RE: https://github.com/Masterminds/glide/issues/736
+.glide/
+.idea/
+release/
+build/
+gcloud/
+dist/
+bin/

.goreleaser.yml

@@ -0,0 +1,16 @@
+builds:
+  - main: ./cmd/podcli
+    binary: podcli
+    ldflags: -s -w -X github.com/stefanprodan/podinfo/pkg/version.REVISION={{.Commit}}
+    goos:
+      - windows
+      - darwin
+      - linux
+    goarch:
+      - amd64
+    env:
+      - CGO_ENABLED=0
+archives:
+  - name_template: "{{ .Binary }}_{{ .Version }}_{{ .Os }}_{{ .Arch }}"
+    files:
+      - none*

Dockerfile

@@ -0,0 +1,43 @@
+FROM golang:1.16-alpine as builder
+
+ARG REVISION
+
+RUN mkdir -p /podinfo/
+
+WORKDIR /podinfo
+
+COPY . .
+
+RUN go mod download
+
+RUN CGO_ENABLED=0 go build -ldflags "-s -w \
+    -X github.com/stefanprodan/podinfo/pkg/version.REVISION=${REVISION}" \
+    -a -o bin/podinfo cmd/podinfo/*
+
+RUN CGO_ENABLED=0 go build -ldflags "-s -w \
+    -X github.com/stefanprodan/podinfo/pkg/version.REVISION=${REVISION}" \
+    -a -o bin/podcli cmd/podcli/*
+
+FROM alpine:3.14
+
+ARG BUILD_DATE
+ARG VERSION
+ARG REVISION
+
+LABEL maintainer="stefanprodan"
+
+RUN addgroup -S app \
+    && adduser -S -G app app \
+    && apk --no-cache add \
+    ca-certificates curl netcat-openbsd
+
+WORKDIR /home/app
+
+COPY --from=builder /podinfo/bin/podinfo .
+COPY --from=builder /podinfo/bin/podcli /usr/local/bin/podcli
+COPY ./ui ./ui
+RUN chown -R app:app ./
+
+USER app
+
+CMD ["./podinfo"]

Dockerfile.base

@@ -0,0 +1,10 @@
+FROM golang:1.16
+
+WORKDIR /workspace
+
+# copy modules manifests
+COPY go.mod go.mod
+COPY go.sum go.sum
+
+# cache modules
+RUN go mod download

LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
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+      "You" (or "Your") shall mean an individual or Legal Entity
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+      any Contribution intentionally submitted for inclusion in the Work
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+      the terms of any separate license agreement you may have executed
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+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
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+      Work (including but not limited to damages for loss of goodwill,
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+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
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+   Copyright 2018 Stefan Prodan. All rights reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
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Makefile

@@ -0,0 +1,80 @@
+# Makefile for releasing podinfo
+#
+# The release version is controlled from pkg/version
+
+TAG?=latest
+NAME:=podinfo
+DOCKER_REPOSITORY:=stefanprodan
+DOCKER_IMAGE_NAME:=$(DOCKER_REPOSITORY)/$(NAME)
+GIT_COMMIT:=$(shell git describe --dirty --always)
+VERSION:=$(shell grep 'VERSION' pkg/version/version.go | awk '{ print $$4 }' | tr -d '"')
+EXTRA_RUN_ARGS?=
+
+run:
+	go run -ldflags "-s -w -X github.com/stefanprodan/podinfo/pkg/version.REVISION=$(GIT_COMMIT)" cmd/podinfo/* \
+	--level=debug --grpc-port=9999 --backend-url=https://httpbin.org/status/401 --backend-url=https://httpbin.org/status/500 \
+	--ui-logo=https://raw.githubusercontent.com/stefanprodan/podinfo/gh-pages/cuddle_clap.gif $(EXTRA_RUN_ARGS)
+
+.PHONY: test
+test:
+	go test ./... -coverprofile cover.out
+
+build:
+	GIT_COMMIT=$$(git rev-list -1 HEAD) && CGO_ENABLED=0 go build  -ldflags "-s -w -X github.com/stefanprodan/podinfo/pkg/version.REVISION=$(GIT_COMMIT)" -a -o ./bin/podinfo ./cmd/podinfo/*
+	GIT_COMMIT=$$(git rev-list -1 HEAD) && CGO_ENABLED=0 go build  -ldflags "-s -w -X github.com/stefanprodan/podinfo/pkg/version.REVISION=$(GIT_COMMIT)" -a -o ./bin/podcli ./cmd/podcli/*
+
+fmt:
+	gofmt -l -s -w ./
+	goimports -l -w ./
+
+build-charts:
+	helm lint charts/*
+	helm package charts/*
+
+build-container:
+	docker build -t $(DOCKER_IMAGE_NAME):$(VERSION) .
+
+build-base:
+	docker build -f Dockerfile.base -t $(DOCKER_REPOSITORY)/podinfo-base:latest .
+
+push-base: build-base
+	docker push $(DOCKER_REPOSITORY)/podinfo-base:latest
+
+test-container:
+	@docker rm -f podinfo || true
+	@docker run -dp 9898:9898 --name=podinfo $(DOCKER_IMAGE_NAME):$(VERSION)
+	@docker ps
+	@TOKEN=$$(curl -sd 'test' localhost:9898/token | jq -r .token) && \
+	curl -sH "Authorization: Bearer $${TOKEN}" localhost:9898/token/validate | grep test
+
+push-container:
+	docker tag $(DOCKER_IMAGE_NAME):$(VERSION) $(DOCKER_IMAGE_NAME):latest
+	docker push $(DOCKER_IMAGE_NAME):$(VERSION)
+	docker push $(DOCKER_IMAGE_NAME):latest
+	docker tag $(DOCKER_IMAGE_NAME):$(VERSION) quay.io/$(DOCKER_IMAGE_NAME):$(VERSION)
+	docker tag $(DOCKER_IMAGE_NAME):$(VERSION) quay.io/$(DOCKER_IMAGE_NAME):latest
+	docker push quay.io/$(DOCKER_IMAGE_NAME):$(VERSION)
+	docker push quay.io/$(DOCKER_IMAGE_NAME):latest
+
+version-set:
+	@next="$(TAG)" && \
+	current="$(VERSION)" && \
+	sed -i '' "s/$$current/$$next/g" pkg/version/version.go && \
+	sed -i '' "s/tag: $$current/tag: $$next/g" charts/podinfo/values.yaml && \
+	sed -i '' "s/tag: $$current/tag: $$next/g" charts/podinfo/values-prod.yaml && \
+	sed -i '' "s/appVersion: $$current/appVersion: $$next/g" charts/podinfo/Chart.yaml && \
+	sed -i '' "s/version: $$current/version: $$next/g" charts/podinfo/Chart.yaml && \
+	sed -i '' "s/podinfo:$$current/podinfo:$$next/g" kustomize/deployment.yaml && \
+	sed -i '' "s/podinfo:$$current/podinfo:$$next/g" deploy/webapp/frontend/deployment.yaml && \
+	sed -i '' "s/podinfo:$$current/podinfo:$$next/g" deploy/webapp/backend/deployment.yaml && \
+	sed -i '' "s/podinfo:$$current/podinfo:$$next/g" deploy/bases/frontend/deployment.yaml && \
+	sed -i '' "s/podinfo:$$current/podinfo:$$next/g" deploy/bases/backend/deployment.yaml && \
+	echo "Version $$next set in code, deployment, chart and kustomize"
+
+release:
+	git tag $(VERSION)
+	git push origin $(VERSION)
+
+swagger:
+	go get github.com/swaggo/swag/cmd/swag
+	cd pkg/api && $$(go env GOPATH)/bin/swag init -g server.go

README.md

@@ -0,0 +1,187 @@
+# podinfo
+
+[![e2e](https://github.com/stefanprodan/podinfo/workflows/e2e/badge.svg)](https://github.com/stefanprodan/podinfo/blob/master/.github/workflows/e2e.yml)
+[![test](https://github.com/stefanprodan/podinfo/workflows/test/badge.svg)](https://github.com/stefanprodan/podinfo/blob/master/.github/workflows/test.yml)
+[![cve-scan](https://github.com/stefanprodan/podinfo/workflows/cve-scan/badge.svg)](https://github.com/stefanprodan/podinfo/blob/master/.github/workflows/cve-scan.yml)
+[![Go Report Card](https://goreportcard.com/badge/github.com/stefanprodan/podinfo)](https://goreportcard.com/report/github.com/stefanprodan/podinfo)
+[![Docker Pulls](https://img.shields.io/docker/pulls/stefanprodan/podinfo)](https://hub.docker.com/r/stefanprodan/podinfo)
+
+Podinfo is a tiny web application made with Go that showcases best practices of running microservices in Kubernetes.
+Podinfo is used by CNCF projects like [Flux](https://github.com/fluxcd/flux2) and [Flagger](https://github.com/fluxcd/flagger)
+for end-to-end testing and workshops.
+
+Specifications:
+
+* Health checks (readiness and liveness)
+* Graceful shutdown on interrupt signals
+* File watcher for secrets and configmaps
+* Instrumented with Prometheus
+* Tracing with Istio and Jaeger
+* Linkerd service profile
+* Structured logging with zap 
+* 12-factor app with viper
+* Fault injection (random errors and latency)
+* Swagger docs
+* Helm and Kustomize installers
+* End-to-End testing with Kubernetes Kind and Helm
+* Kustomize testing with GitHub Actions and Open Policy Agent
+* Multi-arch container image with Docker buildx and Github Actions
+* CVE scanning with trivy
+
+Web API:
+
+* `GET /` prints runtime information
+* `GET /version` prints podinfo version and git commit hash 
+* `GET /metrics` return HTTP requests duration and Go runtime metrics
+* `GET /healthz` used by Kubernetes liveness probe
+* `GET /readyz` used by Kubernetes readiness probe
+* `POST /readyz/enable` signals the Kubernetes LB that this instance is ready to receive traffic
+* `POST /readyz/disable` signals the Kubernetes LB to stop sending requests to this instance
+* `GET /status/{code}` returns the status code
+* `GET /panic` crashes the process with exit code 255
+* `POST /echo` forwards the call to the backend service and echos the posted content 
+* `GET /env` returns the environment variables as a JSON array
+* `GET /headers` returns a JSON with the request HTTP headers
+* `GET /delay/{seconds}` waits for the specified period
+* `POST /token` issues a JWT token valid for one minute `JWT=$(curl -sd 'anon' podinfo:9898/token | jq -r .token)`
+* `GET /token/validate` validates the JWT token `curl -H "Authorization: Bearer $JWT" podinfo:9898/token/validate`
+* `GET /configs` returns a JSON with configmaps and/or secrets mounted in the `config` volume
+* `POST/PUT /cache/{key}` saves the posted content to Redis
+* `GET /cache/{key}` returns the content from Redis if the key exists
+* `DELETE /cache/{key}` deletes the key from Redis if exists
+* `POST /store` writes the posted content to disk at /data/hash and returns the SHA1 hash of the content
+* `GET /store/{hash}` returns the content of the file /data/hash if exists
+* `GET /ws/echo` echos content via websockets `podcli ws ws://localhost:9898/ws/echo`
+* `GET /chunked/{seconds}` uses `transfer-encoding` type `chunked` to give a partial response and then waits for the specified period
+* `GET /swagger.json` returns the API Swagger docs, used for Linkerd service profiling and Gloo routes discovery
+
+gRPC API:
+
+* `/grpc.health.v1.Health/Check` health checking
+
+Web UI:
+
+![podinfo-ui](https://raw.githubusercontent.com/stefanprodan/podinfo/gh-pages/screens/podinfo-ui-v3.png)
+
+To access the Swagger UI open `<podinfo-host>/swagger/index.html` in a browser.
+
+### Guides
+
+* [GitOps Progressive Deliver with Flagger, Helm v3 and Linkerd](https://helm.workshop.flagger.dev/intro/)
+* [GitOps Progressive Deliver on EKS with Flagger and AppMesh](https://eks.handson.flagger.dev/prerequisites/)
+* [Automated canary deployments with Flagger and Istio](https://medium.com/google-cloud/automated-canary-deployments-with-flagger-and-istio-ac747827f9d1)
+* [Kubernetes autoscaling with Istio metrics](https://medium.com/google-cloud/kubernetes-autoscaling-with-istio-metrics-76442253a45a)
+* [Autoscaling EKS on Fargate with custom metrics](https://aws.amazon.com/blogs/containers/autoscaling-eks-on-fargate-with-custom-metrics/)
+* [Managing Helm releases the GitOps way](https://medium.com/google-cloud/managing-helm-releases-the-gitops-way-207a6ac6ff0e)
+* [Securing EKS Ingress With Contour And Let’s Encrypt The GitOps Way](https://aws.amazon.com/blogs/containers/securing-eks-ingress-contour-lets-encrypt-gitops/)
+
+### Install
+
+Helm:
+
+```bash
+helm repo add podinfo https://stefanprodan.github.io/podinfo
+
+helm upgrade --install --wait frontend \
+--namespace test \
+--set replicaCount=2 \
+--set backend=http://backend-podinfo:9898/echo \
+podinfo/podinfo
+
+helm test frontend
+
+helm upgrade --install --wait backend \
+--namespace test \
+--set redis.enabled=true \
+podinfo/podinfo
+```
+
+Kustomize:
+
+```bash
+kubectl apply -k github.com/stefanprodan/podinfo//kustomize
+```
+
+Docker:
+
+```bash
+docker run -dp 9898:9898 stefanprodan/podinfo
+```
+
+### Continuous Delivery
+
+In order to install podinfo on a Kubernetes cluster and keep it up to date with the latest
+release in an automated manner, you can use [Flux](https://fluxcd.io).
+
+Install the Flux CLI on MacOS and Linux using Homebrew:
+
+```sh
+brew install fluxcd/tap/flux
+```
+
+Install the Flux controllers needed for Helm operations:
+
+```sh
+flux install \
+--namespace=flux-system \
+--network-policy=false \
+--components=source-controller,helm-controller
+```
+
+Add podinfo's Helm repository to your cluster and
+configure Flux to check for new chart releases every ten minutes:
+
+```sh
+flux create source helm podinfo \
+--namespace=default \
+--url=https://stefanprodan.github.io/podinfo \
+--interval=10m
+```
+
+Create a `podinfo-values.yaml` file locally:
+
+```sh
+cat > podinfo-values.yaml <<EOL
+replicaCount: 2
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    cpu: 100m
+    memory: 64Mi
+EOL
+```
+
+Create a Helm release for deploying podinfo in the default namespace:
+
+```sh
+flux create helmrelease podinfo \
+--namespace=default \
+--source=HelmRepository/podinfo \
+--release-name=podinfo \
+--chart=podinfo \
+--chart-version=">5.0.0" \
+--values=podinfo-values.yaml
+```
+
+Based on the above definition, Flux will upgrade the release automatically
+when a new version of podinfo is released. If the upgrade fails, Flux
+can [rollback](https://toolkit.fluxcd.io/components/helm/helmreleases/#configuring-failure-remediation)
+to the previous working version.
+
+You can check what version is currently deployed with:
+
+```sh
+flux get helmreleases -n default
+```
+
+To delete podinfo's Helm repository and release from your cluster run:
+
+```sh
+flux -n default delete source helm podinfo
+flux -n default delete helmrelease podinfo
+```
+
+If you wish to manage the lifecycle of your applications in a **GitOps** manner, check out
+this [workflow example](https://github.com/fluxcd/flux2-kustomize-helm-example)
+for multi-env deployments with Flux, Kustomize and Helm.

charts/podinfo/.helmignore

@@ -0,0 +1,21 @@
+# Patterns to ignore when building packages.
+# This supports shell glob matching, relative path matching, and
+# negation (prefixed with !). Only one pattern per line.
+.DS_Store
+# Common VCS dirs
+.git/
+.gitignore
+.bzr/
+.bzrignore
+.hg/
+.hgignore
+.svn/
+# Common backup files
+*.swp
+*.bak
+*.tmp
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

charts/podinfo/Chart.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+version: 6.0.1
+appVersion: 6.0.1
+name: podinfo
+engine: gotpl
+description: Podinfo Helm chart for Kubernetes
+home: https://github.com/stefanprodan/podinfo
+maintainers:
+- email: stefanprodan@users.noreply.github.com
+  name: stefanprodan
+sources:
+- https://github.com/stefanprodan/podinfo
+kubeVersion: ">=1.19.0-0"

charts/podinfo/LICENSE

@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+
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+      "Contributor" shall mean Licensor and any individual or Legal Entity
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+   2. Grant of Copyright License. Subject to the terms and conditions of
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+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
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+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2018 Stefan Prodan. All rights reserved.
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.

charts/podinfo/README.md

@@ -0,0 +1,123 @@
+# Podinfo
+
+Podinfo is a tiny web application made with Go
+that showcases best practices of running microservices in Kubernetes.
+
+Podinfo is used by CNCF projects like [Flux](https://github.com/fluxcd/flux2)
+and [Flagger](https://github.com/fluxcd/flagger)
+for end-to-end testing and workshops.
+
+## Installing the Chart
+
+To install the chart with the release name `my-release`:
+
+```console
+$ helm repo add podinfo https://stefanprodan.github.io/podinfo
+
+$ helm upgrade -i my-release podinfo/podinfo
+```
+
+The command deploys podinfo on the Kubernetes cluster in the default namespace.
+The [configuration](#configuration) section lists the parameters that can be configured during installation.
+
+## Uninstalling the Chart
+
+To uninstall/delete the `my-release` deployment:
+
+```console
+$ helm delete my-release
+```
+
+The command removes all the Kubernetes components associated with the chart and deletes the release.
+
+## Configuration
+
+The following tables lists the configurable parameters of the podinfo chart and their default values.
+
+Parameter | Default | Description
+--- | --- | ---
+`replicaCount` | `1` | Desired number of pods
+`logLevel` | `info` | Log level: `debug`, `info`, `warn`, `error`
+`backend` | `None` | Echo backend URL
+`backends` | `[]` | Array of echo backend URLs
+`cache` | `None` | Redis address in the format `<host>:<port>`
+`redis.enabled` | `false` | Create Redis deployment for caching purposes
+`ui.color` | `#34577c` |  UI color
+`ui.message` | `None` |  UI greetings message
+`ui.logo` | `None` |  UI logo
+`faults.delay` | `false` | Random HTTP response delays between 0 and 5 seconds
+`faults.error` | `false` | 1/3 chances of a random HTTP response error
+`faults.unhealthy` | `false` | When set, the healthy state is never reached
+`faults.unready` | `false` | When set, the ready state is never reached
+`faults.testFail` | `false` | When set, a helm test is included which always fails
+`faults.testTimeout` | `false` | When set, a helm test is included which always times out
+`image.repository` | `stefanprodan/podinfo` | Image repository
+`image.tag` | `<VERSION>` | Image tag
+`image.pullPolicy` | `IfNotPresent` | Image pull policy
+`service.enabled` | `true` | Create a Kubernetes Service, should be disabled when using [Flagger](https://flagger.app)
+`service.type` | `ClusterIP` | Type of the Kubernetes Service
+`service.metricsPort` | `9797` | Prometheus metrics endpoint port
+`service.httpPort` | `9898` | Container HTTP port
+`service.externalPort` | `9898` | ClusterIP HTTP port
+`service.grpcPort` | `9999` | ClusterIP gPRC port
+`service.grpcService` | `podinfo` | gPRC service name
+`service.nodePort` | `31198` | NodePort for the HTTP endpoint
+`h2c.enabled` | `false` | Allow upgrading to h2c (non-TLS version of HTTP/2)
+`hpa.enabled` | `false` | Enables the Kubernetes HPA
+`hpa.maxReplicas` | `10` | Maximum amount of pods
+`hpa.cpu` | `None` | Target CPU usage per pod
+`hpa.memory` | `None` | Target memory usage per pod
+`hpa.requests` | `None` | Target HTTP requests per second per pod
+`serviceAccount.enabled` | `false` | Whether a service account should be created
+`serviceAccount.name` | `None` | The name of the service account to use, if not set and create is true, a name is generated using the fullname template
+`securityContext` | `{}` | The security context to be set on the podinfo container
+`linkerd.profile.enabled` | `false` | Create Linkerd service profile
+`serviceMonitor.enabled` | `false` | Whether a Prometheus Operator service monitor should be created
+`serviceMonitor.interval` | `15s` | Prometheus scraping interval
+`serviceMonitor.additionalLabels` | `{}` | Add additional labels to the service monitor |
+`ingress.enabled` | `false` | Enables Ingress
+`ingress.className ` | `""` | Use ingressClassName
+`ingress.annotations` | `{}` | Ingress annotations
+`ingress.hosts` | `[]` | Ingress accepted hosts
+`ingress.tls` | `[]` | Ingress TLS configuration
+`resources.requests.cpu` | `1m` | Pod CPU request
+`resources.requests.memory` | `16Mi` | Pod memory request
+`resources.limits.cpu` | `None` | Pod CPU limit
+`resources.limits.memory` | `None` | Pod memory limit
+`nodeSelector` | `{}` | Node labels for pod assignment
+`tolerations` | `[]` | List of node taints to tolerate
+`affinity` | `None` | Node/pod affinities
+`podAnnotations` | `{}` | Pod annotations
+
+Specify each parameter using the `--set key=value[,key=value]` argument to `helm install`. For example,
+
+```console
+$ helm install my-release podinfo/podinfo \
+  --set=serviceMonitor.enabled=true,serviceMonitor.interval=5s
+```
+
+To add custom annotations you need to escape the annotation key string:
+
+```console
+$ helm upgrade -i my-release podinfo/podinfo \
+--set podAnnotations."appmesh\.k8s\.aws\/preview"=enabled
+```
+
+Alternatively, a YAML file that specifies the values for the above parameters can be provided while installing the chart. For example,
+
+```console
+$ helm install my-release podinfo/podinfo -f values.yaml
+```
+
+> **Tip**: You can use the default [values.yaml](values.yaml)
+
+## Upgrading the chart
+
+### To =< 5.0.0
+
+Version 5.0.0 is a major update.
+
+* The chart now follows the new Kubernetes label recommendations:
+<https://kubernetes.io/docs/concepts/overview/working-with-objects/common-labels/>
+
+The simplest way to update is to do a force upgrade, which recreates the resources by doing a delete and an install.

charts/podinfo/templates/NOTES.txt

@@ -0,0 +1,18 @@
+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range .Values.ingress.hosts }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ . }}{{ $.Values.ingress.path }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "podinfo.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "podinfo.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "podinfo.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.externalPort }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl -n {{ .Release.Namespace }} port-forward deploy/{{ template "podinfo.fullname" . }} 8080:{{ .Values.service.externalPort }}
+{{- end }}

charts/podinfo/templates/_helpers.tpl

@@ -0,0 +1,69 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "podinfo.name" -}}
+{{- default .Chart.Name .Values.nameOverride | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Create a default fully qualified app name.
+We truncate at 63 chars because some Kubernetes name fields are limited to this (by the DNS naming spec).
+If release name contains chart name it will be used as a full name.
+*/}}
+{{- define "podinfo.fullname" -}}
+{{- if .Values.fullnameOverride }}
+{{- .Values.fullnameOverride | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- $name := default .Chart.Name .Values.nameOverride }}
+{{- if contains $name .Release.Name }}
+{{- .Release.Name | trunc 63 | trimSuffix "-" }}
+{{- else }}
+{{- printf "%s-%s" .Release.Name $name | trunc 63 | trimSuffix "-" }}
+{{- end }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create chart name and version as used by the chart label.
+*/}}
+{{- define "podinfo.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "podinfo.labels" -}}
+helm.sh/chart: {{ include "podinfo.chart" . }}
+{{ include "podinfo.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "podinfo.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "podinfo.fullname" . }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "podinfo.serviceAccountName" -}}
+{{- if .Values.serviceAccount.enabled }}
+{{- default (include "podinfo.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+Create the name of the tls secret for secure port
+*/}}
+{{- define "podinfo.tlsSecretName" -}}
+{{- $fullname := include "podinfo.fullname" . -}}
+{{- default (printf "%s-tls" $fullname) .Values.tls.secretName }}
+{{- end }}

charts/podinfo/templates/certificate.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.certificate.create -}}
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: {{ template "podinfo.fullname" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+spec:
+  dnsNames:
+  {{- range .Values.certificate.dnsNames }}
+    - {{ . | quote }}
+  {{- end }}
+  secretName: {{ template "podinfo.tlsSecretName" . }}
+  issuerRef:
+  {{- .Values.certificate.issuerRef | toYaml | trimSuffix "\n" | nindent 4 }}
+{{- end }}

charts/podinfo/templates/deployment.yaml

@@ -0,0 +1,179 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "podinfo.fullname" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.hpa.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  strategy:
+    type: RollingUpdate
+    rollingUpdate:
+      maxUnavailable: 1
+  selector:
+    matchLabels:
+      {{- include "podinfo.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "podinfo.selectorLabels" . | nindent 8 }}
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "{{ .Values.service.httpPort }}"
+        {{- range $key, $value := .Values.podAnnotations }}
+        {{ $key }}: {{ $value | quote }}
+        {{- end }}
+    spec:
+      terminationGracePeriodSeconds: 30
+      {{- if .Values.serviceAccount.enabled }}
+      serviceAccountName: {{ template "podinfo.serviceAccountName" . }}
+      {{- end }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- if .Values.securityContext }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          {{- else if (or .Values.service.hostPort .Values.tls.hostPort) }}
+          securityContext:
+            allowPrivilegeEscalation: true
+            capabilities:
+              drop:
+                - ALL
+              add:
+                - NET_BIND_SERVICE
+          {{- end }}
+          command:
+            - ./podinfo
+            - --port={{ .Values.service.httpPort | default 9898 }}
+            {{- if .Values.host }}
+            - --host={{ .Values.host }}
+            {{- end }}
+            {{- if .Values.tls.enabled }}
+            - --secure-port={{ .Values.tls.port }}
+            {{- end }}
+            {{- if .Values.tls.certPath }}
+            - --cert-path={{ .Values.tls.certPath }}
+            {{- end }}
+            {{- if .Values.service.metricsPort }}
+            - --port-metrics={{ .Values.service.metricsPort }}
+            {{- end }}
+            {{- if .Values.service.grpcPort }}
+            - --grpc-port={{ .Values.service.grpcPort }}
+            {{- end }}
+            {{- if .Values.service.grpcService }}
+            - --grpc-service-name={{ .Values.service.grpcService }}
+            {{- end }}
+            {{- range .Values.backends }}
+            - --backend-url={{ . }}
+            {{- end }}
+            {{- if .Values.cache }}
+            - --cache-server={{ .Values.cache }}
+            {{- else if .Values.redis.enabled }}
+            - --cache-server={{ template "podinfo.fullname" . }}-redis:6379
+            {{- end }}
+            - --level={{ .Values.logLevel }}
+            - --random-delay={{ .Values.faults.delay }}
+            - --random-error={{ .Values.faults.error }}
+            {{- if .Values.faults.unhealthy }}
+            - --unhealthy
+            {{- end }}
+            {{- if .Values.faults.unready }}
+            - --unready
+            {{- end }}
+            {{- if .Values.h2c.enabled }}
+            - --h2c
+            {{- end }}
+          env:
+          {{- if .Values.ui.message }}
+          - name: PODINFO_UI_MESSAGE
+            value: {{ quote .Values.ui.message }}
+          {{- end }}
+          {{- if .Values.ui.logo }}
+          - name: PODINFO_UI_LOGO
+            value: {{ .Values.ui.logo }}
+          {{- end }}
+          {{- if .Values.ui.color }}
+          - name: PODINFO_UI_COLOR
+            value: {{ quote .Values.ui.color }}
+          {{- end }}
+          {{- if .Values.backend }}
+          - name: PODINFO_BACKEND_URL
+            value: {{ .Values.backend }}
+          {{- end }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.service.httpPort | default 9898 }}
+              protocol: TCP
+              {{- if .Values.service.hostPort }}
+              hostPort: {{ .Values.service.hostPort }}
+              {{- end }}
+            {{- if .Values.tls.enabled }}
+            - name: https
+              containerPort: {{ .Values.tls.port | default 9899 }}
+              protocol: TCP
+              {{- if .Values.tls.hostPort }}
+              hostPort: {{ .Values.tls.hostPort }}
+              {{- end }}
+            {{- end }}
+            {{- if .Values.service.metricsPort }}
+            - name: http-metrics
+              containerPort: {{ .Values.service.metricsPort }}
+              protocol: TCP
+            {{- end }}
+            {{- if .Values.service.grpcPort }}
+            - name: grpc
+              containerPort: {{ .Values.service.grpcPort }}
+              protocol: TCP
+            {{- end }}
+          livenessProbe:
+            exec:
+              command:
+              - podcli
+              - check
+              - http
+              - localhost:{{ .Values.service.httpPort | default 9898 }}/healthz
+            initialDelaySeconds: 1
+            timeoutSeconds: 5
+          readinessProbe:
+            exec:
+              command:
+              - podcli
+              - check
+              - http
+              - localhost:{{ .Values.service.httpPort | default 9898 }}/readyz
+            initialDelaySeconds: 1
+            timeoutSeconds: 5
+          volumeMounts:
+          - name: data
+            mountPath: /data
+          {{- if .Values.tls.enabled }}
+          - name: tls
+            mountPath: {{ .Values.tls.certPath | default "/data/cert" }}
+            readOnly: true
+          {{- end }}
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+      volumes:
+      - name: data
+        emptyDir: {}
+      {{- if .Values.tls.enabled }}
+      - name: tls
+        secret:
+          secretName: {{ template "podinfo.tlsSecretName" . }}
+      {{- end }}

charts/podinfo/templates/hpa.yaml

@@ -0,0 +1,41 @@
+{{- if .Values.hpa.enabled -}}
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ template "podinfo.fullname" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}  
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ template "podinfo.fullname" . }}
+  minReplicas: {{ .Values.replicaCount }}
+  maxReplicas: {{ .Values.hpa.maxReplicas }}
+  metrics:
+  {{- if .Values.hpa.cpu }}
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: {{ .Values.hpa.cpu }}
+  {{- end }}
+  {{- if .Values.hpa.memory }}
+  - type: Resource
+    resource:
+      name: memory
+      target:
+        type: AverageValue
+        averageValue: {{ .Values.hpa.memory }}
+  {{- end }}
+  {{- if .Values.hpa.requests }}
+  - type: Pods
+    pods:
+      metric:
+        name: http_requests
+      target:
+        type: AverageValue
+        averageValue: {{ .Values.hpa.requests }}
+  {{- end }}
+{{- end }}

charts/podinfo/templates/ingress.yaml

@@ -0,0 +1,41 @@
+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "podinfo.fullname" . -}}
+{{- $svcPort := .Values.service.externalPort -}}
+apiVersion: networking.k8s.io/v1
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  ingressClassName: {{ .Values.ingress.className }}
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            pathType: {{ .pathType }}
+            backend:
+              service:
+                name: {{ $fullName }}
+                port:
+                  number: {{ $svcPort }}
+          {{- end }}
+    {{- end }}
+{{- end }}

charts/podinfo/templates/linkerd.yaml

@@ -0,0 +1,98 @@
+{{- if .Values.linkerd.profile.enabled -}}
+apiVersion: linkerd.io/v1alpha2
+kind: ServiceProfile
+metadata:
+  name: {{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}.svc.cluster.local
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}  
+spec:
+  routes:
+    - condition:
+        method: GET
+        pathRegex: /
+      name: GET /
+    - condition:
+        method: POST
+        pathRegex: /api/echo
+      name: POST /api/echo
+    - condition:
+        method: GET
+        pathRegex: /api/info
+      name: GET /api/info
+    - condition:
+        method: GET
+        pathRegex: /chunked/[^/]*
+      name: GET /chunked/{seconds}
+    - condition:
+        method: GET
+        pathRegex: /delay/[^/]*
+      name: GET /delay/{seconds}
+    - condition:
+        method: GET
+        pathRegex: /env
+      name: GET /env
+    - condition:
+        method: GET
+        pathRegex: /headers
+      name: GET /headers
+    - condition:
+        method: GET
+        pathRegex: /healthz
+      name: GET /healthz
+    - condition:
+        method: GET
+        pathRegex: /metrics
+      name: GET /metrics
+    - condition:
+        method: GET
+        pathRegex: /panic
+      name: GET /panic
+    - condition:
+        method: GET
+        pathRegex: /readyz
+      name: GET /readyz
+    - condition:
+        method: POST
+        pathRegex: /readyz/disable
+      name: POST /readyz/disable
+    - condition:
+        method: POST
+        pathRegex: /readyz/enable
+      name: POST /readyz/enable
+    - condition:
+        method: GET
+        pathRegex: /status/[^/]*
+      name: GET /status/{code}
+    - condition:
+        method: POST
+        pathRegex: /cache
+      name: POST /cache
+    - condition:
+        method: GET
+        pathRegex: /cache/[^/]*
+      name: GET /cache/{hash}
+    - condition:
+        method: POST
+        pathRegex: /store
+      name: POST /store
+    - condition:
+        method: GET
+        pathRegex: /store/[^/]*
+      name: GET /store/{hash}
+    - condition:
+        method: POST
+        pathRegex: /token
+      name: POST /token
+    - condition:
+        method: POST
+        pathRegex: /token/validate
+      name: POST /token/validate
+    - condition:
+        method: GET
+        pathRegex: /version
+      name: GET /version
+    - condition:
+        method: POST
+        pathRegex: /ws/echo
+      name: POST /ws/echo
+{{- end }}

charts/podinfo/templates/redis/config.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.redis.enabled -}}
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ template "podinfo.fullname" . }}-redis
+data:
+  redis.conf: |
+    maxmemory 64mb
+    maxmemory-policy allkeys-lru
+    save ""
+    appendonly no
+{{- end }}

charts/podinfo/templates/redis/deployment.yaml

@@ -0,0 +1,68 @@
+{{- if .Values.redis.enabled -}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ template "podinfo.fullname" . }}-redis
+  labels:
+    app: {{ template "podinfo.fullname" . }}-redis
+spec:
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: {{ template "podinfo.fullname" . }}-redis
+  template:
+    metadata:
+      labels:
+        app: {{ template "podinfo.fullname" . }}-redis
+      annotations:
+        checksum/config: {{ include (print $.Template.BasePath "/redis/config.yaml") . | sha256sum | quote }}
+    spec:
+      {{- if .Values.serviceAccount.enabled }}
+      serviceAccountName: {{ template "podinfo.serviceAccountName" . }}
+      {{- end }}
+      containers:
+        - name: redis
+          image: "{{ .Values.redis.repository }}:{{ .Values.redis.tag }}"
+          imagePullPolicy: IfNotPresent
+          command:
+            - redis-server
+            - "/redis-master/redis.conf"
+          ports:
+            - name: redis
+              containerPort: 6379
+              protocol: TCP
+          livenessProbe:
+            tcpSocket:
+              port: redis
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          readinessProbe:
+            exec:
+              command:
+                - redis-cli
+                - ping
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          resources:
+            limits:
+              cpu: 1000m
+              memory: 128Mi
+            requests:
+              cpu: 100m
+              memory: 32Mi
+          volumeMounts:
+            - mountPath: /var/lib/redis
+              name: data
+            - mountPath: /redis-master
+              name: config
+      volumes:
+        - name: data
+          emptyDir: {}
+        - name: config
+          configMap:
+            name: {{ template "podinfo.fullname" . }}-redis
+            items:
+              - key: redis.conf
+                path: redis.conf
+{{- end }}

charts/podinfo/templates/redis/service.yaml

@@ -0,0 +1,17 @@
+{{- if .Values.redis.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "podinfo.fullname" . }}-redis
+  labels:
+    app: {{ template "podinfo.fullname" . }}-redis
+spec:
+  type: ClusterIP
+  selector:
+    app: {{ template "podinfo.fullname" . }}-redis
+  ports:
+    - name: redis
+      port: 6379
+      protocol: TCP
+      targetPort: redis
+{{- end }}

charts/podinfo/templates/service.yaml

@@ -0,0 +1,36 @@
+{{- if .Values.service.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "podinfo.fullname" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+{{- with .Values.service.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.externalPort }}
+      targetPort: http
+      protocol: TCP
+      name: http
+      {{- if (and (eq .Values.service.type "NodePort") (not (empty .Values.service.nodePort))) }}
+      nodePort: {{ .Values.service.nodePort }}
+      {{- end }}
+    {{- if .Values.tls.enabled }}
+    - port: {{ .Values.tls.port | default 9899 }}
+      targetPort: https
+      protocol: TCP
+      name: https
+    {{- end }}
+    {{- if .Values.service.grpcPort }}
+    - port: {{ .Values.service.grpcPort }}
+      targetPort: grpc
+      protocol: TCP
+      name: grpc
+    {{- end }}
+  selector:
+    {{- include "podinfo.selectorLabels" . | nindent 4 }}
+{{- end }}

charts/podinfo/templates/serviceaccount.yaml

@@ -0,0 +1,8 @@
+{{- if .Values.serviceAccount.enabled -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ template "podinfo.serviceAccountName" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+{{- end -}}

charts/podinfo/templates/servicemonitor.yaml

@@ -0,0 +1,22 @@
+{{- if .Values.serviceMonitor.enabled -}}
+apiVersion: monitoring.coreos.com/v1
+kind: ServiceMonitor
+metadata:
+  name: {{ template "podinfo.fullname" . }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+    {{- with .Values.serviceMonitor.additionalLabels }}
+    {{- toYaml . | nindent 4 }}
+    {{- end }}
+spec:
+  endpoints:
+    - path: /metrics
+      port: http
+      interval: {{ .Values.serviceMonitor.interval }}
+  namespaceSelector:
+    matchNames:
+      - {{ .Release.Namespace }}
+  selector:
+    matchLabels:
+      {{- include "podinfo.selectorLabels" . | nindent 6 }}
+{{- end }}

charts/podinfo/templates/tests/cache.yaml

@@ -0,0 +1,29 @@
+{{- if .Values.cache }}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-cache-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: curl
+      image: curlimages/curl:7.69.0
+      command:
+        - sh
+        - -c
+        - |
+          curl -sd 'data' ${PODINFO_SVC}/cache/test &&
+          curl -s ${PODINFO_SVC}/cache/test | grep data &&
+          curl -s -XDELETE ${PODINFO_SVC}/cache/test
+      env:
+      - name: PODINFO_SVC
+        value: "{{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}:{{ .Values.service.externalPort }}"
+  restartPolicy: Never
+{{- end }}

charts/podinfo/templates/tests/fail.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.faults.testFail }}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-fault-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: fault
+      image: alpine:3.11
+      command: ['/bin/sh']
+      args:  ['-c', 'exit 1']
+  restartPolicy: Never
+{{- end }}

charts/podinfo/templates/tests/grpc.yaml

@@ -0,0 +1,19 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-grpc-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: grpc-health-probe
+      image: stefanprodan/grpc_health_probe:v0.3.0
+      command: ['grpc_health_probe']
+      args:  ['-addr={{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}:{{ .Values.service.grpcPort }}']
+  restartPolicy: Never

charts/podinfo/templates/tests/jwt.yaml

@@ -0,0 +1,26 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-jwt-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: tools
+      image: giantswarm/tiny-tools
+      command:
+        - sh
+        - -c
+        - |
+          TOKEN=$(curl -sd 'test' ${PODINFO_SVC}/token | jq -r .token) &&
+          curl -sH "Authorization: Bearer ${TOKEN}" ${PODINFO_SVC}/token/validate | grep test
+      env:
+      - name: PODINFO_SVC
+        value: "{{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}:{{ .Values.service.externalPort }}"
+  restartPolicy: Never

charts/podinfo/templates/tests/service.yaml

@@ -0,0 +1,25 @@
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-service-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: curl
+      image: curlimages/curl:7.69.0
+      command:
+        - sh
+        - -c
+        - |
+          curl -s ${PODINFO_SVC}/api/info | grep version
+      env:
+        - name: PODINFO_SVC
+          value: "{{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}:{{ .Values.service.externalPort }}"
+  restartPolicy: Never

charts/podinfo/templates/tests/timeout.yaml

@@ -0,0 +1,21 @@
+{{- if .Values.faults.testTimeout }}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-fault-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: fault
+      image: alpine:3.11
+      command: ['/bin/sh']
+      args:  ['-c', 'while sleep 3600; do :; done']
+  restartPolicy: Never
+{{- end }}

charts/podinfo/templates/tests/tls.yaml

@@ -0,0 +1,27 @@
+{{- if .Values.tls.enabled -}}
+apiVersion: v1
+kind: Pod
+metadata:
+  name: {{ template "podinfo.fullname" . }}-tls-test-{{ randAlphaNum 5 | lower }}
+  labels:
+    {{- include "podinfo.labels" . | nindent 4 }}
+  annotations:
+    "helm.sh/hook": test-success
+    "helm.sh/hook-delete-policy": before-hook-creation,hook-succeeded
+    sidecar.istio.io/inject: "false"
+    linkerd.io/inject: disabled
+    appmesh.k8s.aws/sidecarInjectorWebhook: disabled
+spec:
+  containers:
+    - name: curl
+      image: curlimages/curl:7.69.0
+      command:
+        - sh
+        - -c
+        - |
+          curl -sk ${PODINFO_SVC}/api/info | grep version
+      env:
+        - name: PODINFO_SVC
+          value: "https://{{ template "podinfo.fullname" . }}.{{ .Release.Namespace }}:{{ .Values.tls.port }}"
+  restartPolicy: Never
+{{- end }}

charts/podinfo/values-prod.yaml

@@ -0,0 +1,137 @@
+# Production values for podinfo.
+# Includes Redis deployment and memory limits.
+
+replicaCount: 1
+logLevel: info
+backend: #http://backend-podinfo:9898/echo
+backends: []
+
+image:
+  repository: ghcr.io/stefanprodan/podinfo
+  tag: 6.0.1
+  pullPolicy: IfNotPresent
+
+ui:
+  color: "#34577c"
+  message: ""
+  logo: ""
+
+# failure conditions
+faults:
+  delay: false
+  error: false
+  unhealthy: false
+  unready: false
+  testFail: false
+  testTimeout: false
+
+# Kubernetes Service settings
+service:
+  enabled: true
+  annotations: {}
+  type: ClusterIP
+  metricsPort: 9797
+  httpPort: 9898
+  externalPort: 9898
+  grpcPort: 9999
+  grpcService: podinfo
+  nodePort: 31198
+
+# enable h2c protocol (non-TLS version of HTTP/2)
+h2c:
+  enabled: false
+
+# enable tls on the podinfo service
+tls:
+  enabled: false
+  # the name of the secret used to mount the certificate key pair
+  secretName:
+  # the path where the certificate key pair will be mounted
+  certPath: /data/cert
+  # the port used to host the tls endpoint on the service
+  port: 9899
+  # the port used to bind the tls port to the host
+  # NOTE: requires privileged container with NET_BIND_SERVICE capability -- this is useful for testing
+  # in local clusters such as kind without port forwarding
+  hostPort:
+
+# create a certificate manager certificate (cert-manager required)
+certificate:
+  create: false
+  # the issuer used to issue the certificate
+  issuerRef:
+    kind: ClusterIssuer
+    name: self-signed
+  # the hostname / subject alternative names for the certificate
+  dnsNames:
+    - podinfo
+
+# metrics-server add-on required
+hpa:
+  enabled: true
+  maxReplicas: 5
+  # average total CPU usage per pod (1-100)
+  cpu: 99
+  # average memory usage per pod (100Mi-1Gi)
+  memory:
+  # average http requests per second per pod (k8s-prometheus-adapter)
+  requests:
+
+# Redis address in the format <host>:<port>
+cache: ""
+# Redis deployment
+redis:
+  enabled: true
+  repository: redis
+  tag: 6.0.8
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  enabled: false
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name:
+
+# set container security context
+securityContext: {}
+
+ingress:
+  enabled: false
+  className: ""
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  hosts:
+    - host: podinfo.local
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+linkerd:
+  profile:
+    enabled: false
+
+# create Prometheus Operator monitor
+serviceMonitor:
+  enabled: false
+  interval: 15s
+  additionalLabels: {}
+
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    cpu: 100m
+    memory: 64Mi
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+
+podAnnotations: {}

charts/podinfo/values.yaml

@@ -0,0 +1,140 @@
+# Default values for podinfo.
+
+replicaCount: 1
+logLevel: info
+host: #0.0.0.0
+backend: #http://backend-podinfo:9898/echo
+backends: []
+
+image:
+  repository: ghcr.io/stefanprodan/podinfo
+  tag: 6.0.1
+  pullPolicy: IfNotPresent
+
+ui:
+  color: "#34577c"
+  message: ""
+  logo: ""
+
+# failure conditions
+faults:
+  delay: false
+  error: false
+  unhealthy: false
+  unready: false
+  testFail: false
+  testTimeout: false
+
+# Kubernetes Service settings
+service:
+  enabled: true
+  annotations: {}
+  type: ClusterIP
+  metricsPort: 9797
+  httpPort: 9898
+  externalPort: 9898
+  grpcPort: 9999
+  grpcService: podinfo
+  nodePort: 31198
+  # the port used to bind the http port to the host
+  # NOTE: requires privileged container with NET_BIND_SERVICE capability -- this is useful for testing
+  # in local clusters such as kind without port forwarding
+  hostPort:
+
+# enable h2c protocol (non-TLS version of HTTP/2)
+h2c:
+  enabled: false
+
+# enable tls on the podinfo service
+tls:
+  enabled: false
+  # the name of the secret used to mount the certificate key pair
+  secretName:
+  # the path where the certificate key pair will be mounted
+  certPath: /data/cert
+  # the port used to host the tls endpoint on the service
+  port: 9899
+  # the port used to bind the tls port to the host
+  # NOTE: requires privileged container with NET_BIND_SERVICE capability -- this is useful for testing
+  # in local clusters such as kind without port forwarding
+  hostPort:
+
+# create a certificate manager certificate (cert-manager required)
+certificate:
+  create: false
+  # the issuer used to issue the certificate
+  issuerRef:
+    kind: ClusterIssuer
+    name: self-signed
+  # the hostname / subject alternative names for the certificate
+  dnsNames:
+    - podinfo
+
+# metrics-server add-on required
+hpa:
+  enabled: false
+  maxReplicas: 10
+  # average total CPU usage per pod (1-100)
+  cpu:
+  # average memory usage per pod (100Mi-1Gi)
+  memory:
+  # average http requests per second per pod (k8s-prometheus-adapter)
+  requests:
+
+# Redis address in the format <host>:<port>
+cache: ""
+# Redis deployment
+redis:
+  enabled: false
+  repository: redis
+  tag: 6.0.8
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  enabled: false
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name:
+
+# set container security context
+securityContext: {}
+
+ingress:
+  enabled: false
+  className: ""
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  hosts:
+    - host: podinfo.local
+      paths:
+        - path: /
+          pathType: ImplementationSpecific
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+linkerd:
+  profile:
+    enabled: false
+
+# create Prometheus Operator monitor
+serviceMonitor:
+  enabled: false
+  interval: 15s
+  additionalLabels: {}
+
+resources:
+  limits:
+  requests:
+    cpu: 1m
+    memory: 16Mi
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+
+podAnnotations: {}

cloudbuild.yaml

@@ -0,0 +1,4 @@
+steps:
+- name: 'gcr.io/cloud-builders/docker'
+  args: ['build','-f' , 'Dockerfile', '-t', 'gcr.io/$PROJECT_ID/podinfo:$BRANCH_NAME-$SHORT_SHA', '.']
+images: ['gcr.io/$PROJECT_ID/podinfo:$BRANCH_NAME-$SHORT_SHA']

cmd/podcli/check.go

@@ -0,0 +1,313 @@
+package main
+
+import (
+	"bytes"
+	"context"
+	"crypto/tls"
+	"fmt"
+	"net"
+	"net/http"
+	"net/url"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+	"google.golang.org/grpc"
+	"google.golang.org/grpc/codes"
+	"google.golang.org/grpc/health/grpc_health_v1"
+	"google.golang.org/grpc/status"
+)
+
+var (
+	retryCount      int
+	retryDelay      time.Duration
+	method          string
+	body            string
+	timeout         time.Duration
+	grpcServiceName string
+)
+
+var checkCmd = &cobra.Command{
+	Use:   `check`,
+	Short: "Health check commands",
+	Long:  "Commands for running health checks",
+}
+
+var checkUrlCmd = &cobra.Command{
+	Use:     `http [address]`,
+	Short:   "HTTP(S) health check",
+	Example: `  check http https://httpbin.org/anything --method=POST --retry=2 --delay=2s --timeout=3s --body='{"test"=1}'`,
+	RunE:    runCheck,
+}
+
+var checkTcpCmd = &cobra.Command{
+	Use:     `tcp [address]`,
+	Short:   "TCP health check",
+	Example: `  check tcp httpbin.org:443 --retry=1 --delay=2s --timeout=2s`,
+	RunE:    runCheckTCP,
+}
+
+var checkCertCmd = &cobra.Command{
+	Use:     `cert [address]`,
+	Short:   "SSL/TLS certificate validity check",
+	Example: `  check cert httpbin.org`,
+	RunE:    runCheckCert,
+}
+
+var checkgRPCCmd = &cobra.Command{
+	Use:     `grpc [address]`,
+	Short:   "gRPC health check",
+	Example: `  check grpc localhost:8080 --service=podinfo --retry=1 --delay=2s --timeout=2s`,
+	RunE:    runCheckgPRC,
+}
+
+func init() {
+	checkUrlCmd.Flags().StringVar(&method, "method", "GET", "HTTP method")
+	checkUrlCmd.Flags().StringVar(&body, "body", "", "HTTP POST/PUT content")
+	checkUrlCmd.Flags().IntVar(&retryCount, "retry", 0, "times to retry the HTTP call")
+	checkUrlCmd.Flags().DurationVar(&retryDelay, "delay", 1*time.Second, "wait duration between retries")
+	checkUrlCmd.Flags().DurationVar(&timeout, "timeout", 5*time.Second, "timeout")
+	checkCmd.AddCommand(checkUrlCmd)
+
+	checkTcpCmd.Flags().IntVar(&retryCount, "retry", 0, "times to retry the TCP check")
+	checkTcpCmd.Flags().DurationVar(&retryDelay, "delay", 1*time.Second, "wait duration between retries")
+	checkTcpCmd.Flags().DurationVar(&timeout, "timeout", 5*time.Second, "timeout")
+	checkCmd.AddCommand(checkTcpCmd)
+
+	checkgRPCCmd.Flags().IntVar(&retryCount, "retry", 0, "times to retry the TCP check")
+	checkgRPCCmd.Flags().DurationVar(&retryDelay, "delay", 1*time.Second, "wait duration between retries")
+	checkgRPCCmd.Flags().DurationVar(&timeout, "timeout", 5*time.Second, "timeout")
+	checkgRPCCmd.Flags().StringVar(&grpcServiceName, "service", "", "gRPC service name")
+	checkCmd.AddCommand(checkgRPCCmd)
+
+	checkCmd.AddCommand(checkCertCmd)
+
+	rootCmd.AddCommand(checkCmd)
+}
+
+func runCheck(cmd *cobra.Command, args []string) error {
+	if retryCount < 0 {
+		return fmt.Errorf("--retry is required")
+	}
+	if len(args) < 1 {
+		return fmt.Errorf("address is required! example: check http https://httpbin.org")
+	}
+
+	address := args[0]
+	if !strings.HasPrefix(address, "http://") && !strings.HasPrefix(address, "https://") {
+		address = fmt.Sprintf("http://%s", address)
+	}
+
+	for n := 0; n <= retryCount; n++ {
+		if n != 1 {
+			time.Sleep(retryDelay)
+		}
+
+		req, err := http.NewRequest(method, address, bytes.NewBuffer([]byte(body)))
+		if err != nil {
+			logger.Info("check failed",
+				zap.String("address", address),
+				zap.Error(err))
+			os.Exit(1)
+		}
+
+		ctx, cancel := context.WithTimeout(req.Context(), timeout)
+		resp, err := http.DefaultClient.Do(req.WithContext(ctx))
+		cancel()
+		if err != nil {
+			logger.Info("check failed",
+				zap.String("address", address),
+				zap.Error(err))
+			continue
+		}
+
+		if resp.Body != nil {
+			resp.Body.Close()
+		}
+
+		if resp.StatusCode >= 200 && resp.StatusCode < 400 {
+			logger.Info("check succeed",
+				zap.String("address", address),
+				zap.Int("status code", resp.StatusCode),
+				zap.String("response size", fmtContentLength(resp.ContentLength)))
+			os.Exit(0)
+		} else {
+			logger.Info("check failed",
+				zap.String("address", address),
+				zap.Int("status code", resp.StatusCode))
+			continue
+		}
+	}
+
+	os.Exit(1)
+	return nil
+}
+
+func runCheckTCP(cmd *cobra.Command, args []string) error {
+	if retryCount < 0 {
+		return fmt.Errorf("--retry is required")
+	}
+	if len(args) < 1 {
+		return fmt.Errorf("address is required! example: check tcp httpbin.org:80")
+	}
+	address := args[0]
+
+	for n := 0; n <= retryCount; n++ {
+		if n != 1 {
+			time.Sleep(retryDelay)
+		}
+
+		conn, err := net.DialTimeout("tcp", address, timeout)
+
+		if err != nil {
+			logger.Info("check failed",
+				zap.String("address", address),
+				zap.Error(err))
+			continue
+		}
+
+		conn.Close()
+		logger.Info("check succeed", zap.String("address", address))
+		os.Exit(0)
+
+	}
+
+	os.Exit(1)
+	return nil
+}
+
+func runCheckCert(cmd *cobra.Command, args []string) error {
+	if len(args) < 1 {
+		return fmt.Errorf("address is required! example: check cert httpbin.org")
+	}
+	host := args[0]
+	if !strings.HasPrefix(host, "https://") {
+		host = "https://" + host
+	}
+
+	u, err := url.Parse(host)
+	if err != nil {
+		logger.Info("check failed",
+			zap.String("address", host),
+			zap.Error(err))
+		os.Exit(1)
+	}
+
+	address := u.Hostname() + ":443"
+	ipConn, err := net.DialTimeout("tcp", address, 5*time.Second)
+	if err != nil {
+		logger.Info("check failed",
+			zap.String("address", address),
+			zap.Error(err))
+		os.Exit(1)
+
+	}
+
+	defer ipConn.Close()
+	conn := tls.Client(ipConn, &tls.Config{
+		InsecureSkipVerify: true,
+		ServerName:         u.Hostname(),
+	})
+	if err = conn.Handshake(); err != nil {
+		logger.Info("check failed",
+			zap.String("address", address),
+			zap.Error(err))
+		os.Exit(1)
+	}
+
+	defer conn.Close()
+	addr := conn.RemoteAddr()
+	_, _, err = net.SplitHostPort(addr.String())
+	if err != nil {
+		logger.Info("check failed",
+			zap.String("address", address),
+			zap.Error(err))
+		os.Exit(1)
+	}
+
+	cert := conn.ConnectionState().PeerCertificates[0]
+
+	timeNow := time.Now()
+	if timeNow.After(cert.NotAfter) {
+		logger.Info("check failed",
+			zap.String("address", address),
+			zap.String("issuer", cert.Issuer.CommonName),
+			zap.String("subject", cert.Subject.CommonName),
+			zap.Time("expired", cert.NotAfter))
+		os.Exit(1)
+	}
+
+	logger.Info("check succeed",
+		zap.String("address", address),
+		zap.String("issuer", cert.Issuer.CommonName),
+		zap.String("subject", cert.Subject.CommonName),
+		zap.Time("notAfter", cert.NotAfter),
+		zap.Time("notBefore", cert.NotBefore))
+
+	return nil
+}
+
+func fmtContentLength(b int64) string {
+	const unit = 1000
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	}
+	div, exp := int64(unit), 0
+	for n := b / unit; n >= unit; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %cB", float64(b)/float64(div), "kMGTPE"[exp])
+}
+
+func runCheckgPRC(cmd *cobra.Command, args []string) error {
+	if retryCount < 0 {
+		return fmt.Errorf("--retry is required")
+	}
+	if len(args) < 1 {
+		return fmt.Errorf("address is required! example: check grpc localhost:8080")
+	}
+	address := args[0]
+
+	for n := 0; n <= retryCount; n++ {
+		if n != 1 {
+			time.Sleep(retryDelay)
+		}
+
+		conn, err := grpc.Dial(address, grpc.WithInsecure())
+		if err != nil {
+			logger.Info("check failed",
+				zap.String("address", address),
+				zap.Error(err))
+			continue
+		}
+		ctx, cancel := context.WithTimeout(context.Background(), timeout)
+		resp, err := grpc_health_v1.NewHealthClient(conn).Check(ctx, &grpc_health_v1.HealthCheckRequest{
+			Service: grpcServiceName,
+		})
+		cancel()
+
+		if err != nil {
+			if stat, ok := status.FromError(err); ok && stat.Code() == codes.Unimplemented {
+				logger.Info("gPRC health protocol not implemented")
+				os.Exit(1)
+			} else {
+				logger.Info("check failed",
+					zap.String("address", address),
+					zap.Error(err))
+			}
+			continue
+		}
+
+		conn.Close()
+		logger.Info("check succeed",
+			zap.String("status", resp.GetStatus().String()))
+		os.Exit(0)
+
+	}
+
+	os.Exit(1)
+	return nil
+}

cmd/podcli/main.go

@@ -0,0 +1,39 @@
+package main
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"strings"
+
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+)
+
+var rootCmd = &cobra.Command{
+	Use:   "podcli",
+	Short: "podinfo command line",
+	Long: `
+podinfo command line utilities`,
+}
+
+var (
+	logger *zap.Logger
+)
+
+func main() {
+
+	var err error
+	logger, err = zap.NewDevelopment()
+	if err != nil {
+		log.Fatalf("can't initialize zap logger: %v", err)
+	}
+	defer logger.Sync()
+
+	rootCmd.SetArgs(os.Args[1:])
+	if err := rootCmd.Execute(); err != nil {
+		e := err.Error()
+		fmt.Println(strings.ToUpper(e[:1]) + e[1:])
+		os.Exit(1)
+	}
+}

cmd/podcli/version.go

@@ -0,0 +1,21 @@
+package main
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+	"github.com/stefanprodan/podinfo/pkg/version"
+)
+
+func init() {
+	rootCmd.AddCommand(versionCmd)
+}
+
+var versionCmd = &cobra.Command{
+	Use:   `version`,
+	Short: "Prints podcli version",
+	RunE: func(cmd *cobra.Command, args []string) error {
+		fmt.Println(version.VERSION)
+		return nil
+	},
+}

cmd/podcli/ws.go

@@ -0,0 +1,143 @@
+package main
+
+import (
+	"encoding/hex"
+	"fmt"
+	"net/http"
+	"net/url"
+	"os"
+	"regexp"
+	"strings"
+
+	"github.com/chzyer/readline"
+	"github.com/fatih/color"
+	"github.com/gorilla/websocket"
+	"github.com/spf13/cobra"
+	"go.uber.org/zap"
+)
+
+var origin string
+
+func init() {
+	wsCmd.Flags().StringVarP(&origin, "origin", "o", "", "websocket origin")
+	rootCmd.AddCommand(wsCmd)
+}
+
+var wsCmd = &cobra.Command{
+	Use:     `ws [address]`,
+	Short:   "Websocket client",
+	Example: `  ws localhost:9898/ws/echo`,
+	RunE: func(cmd *cobra.Command, args []string) error {
+		if len(args) < 1 {
+			return fmt.Errorf("address is required")
+		}
+
+		address := args[0]
+		if !strings.HasPrefix(address, "ws://") && !strings.HasPrefix(address, "wss://") {
+			address = fmt.Sprintf("ws://%s", address)
+		}
+
+		dest, err := url.Parse(address)
+		if err != nil {
+			return err
+		}
+		if origin != "" {
+		} else {
+			originURL := *dest
+			if dest.Scheme == "wss" {
+				originURL.Scheme = "https"
+			} else {
+				originURL.Scheme = "http"
+			}
+			origin = originURL.String()
+		}
+
+		err = connect(dest.String(), origin, &readline.Config{
+			Prompt: "> ",
+		})
+		if err != nil {
+			logger.Info("websocket closed", zap.Error(err))
+		}
+		return nil
+	},
+}
+
+type session struct {
+	ws      *websocket.Conn
+	rl      *readline.Instance
+	errChan chan error
+}
+
+func connect(url, origin string, rlConf *readline.Config) error {
+	headers := make(http.Header)
+	headers.Add("Origin", origin)
+
+	ws, _, err := websocket.DefaultDialer.Dial(url, headers)
+	if err != nil {
+		return err
+	}
+
+	rl, err := readline.NewEx(rlConf)
+	if err != nil {
+		return err
+	}
+	defer rl.Close()
+
+	sess := &session{
+		ws:      ws,
+		rl:      rl,
+		errChan: make(chan error),
+	}
+
+	go sess.readConsole()
+	go sess.readWebsocket()
+
+	return <-sess.errChan
+}
+
+func (s *session) readConsole() {
+	for {
+		line, err := s.rl.Readline()
+		if err != nil {
+			s.errChan <- err
+			return
+		}
+
+		err = s.ws.WriteMessage(websocket.TextMessage, []byte(line))
+		if err != nil {
+			s.errChan <- err
+			return
+		}
+	}
+}
+
+func bytesToFormattedHex(bytes []byte) string {
+	text := hex.EncodeToString(bytes)
+	return regexp.MustCompile("(..)").ReplaceAllString(text, "$1 ")
+}
+
+func (s *session) readWebsocket() {
+	rxSprintf := color.New(color.FgGreen).SprintfFunc()
+
+	for {
+		msgType, buf, err := s.ws.ReadMessage()
+		if err != nil {
+			fmt.Fprint(s.rl.Stdout(), rxSprintf("< %s\n", err.Error()))
+			os.Exit(1)
+			return
+		}
+
+		var text string
+		switch msgType {
+		case websocket.TextMessage:
+			text = string(buf)
+		case websocket.BinaryMessage:
+			text = bytesToFormattedHex(buf)
+		default:
+			s.errChan <- fmt.Errorf("unknown websocket frame type: %d", msgType)
+			return
+		}
+
+		fmt.Fprint(s.rl.Stdout(), rxSprintf("< %s\n", text))
+	}
+}

cmd/podinfo/main.go

@@ -0,0 +1,248 @@
+package main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+	"path/filepath"
+	"strconv"
+	"strings"
+	"time"
+
+	"github.com/spf13/pflag"
+	"github.com/spf13/viper"
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+
+	"github.com/stefanprodan/podinfo/pkg/api"
+	"github.com/stefanprodan/podinfo/pkg/grpc"
+	"github.com/stefanprodan/podinfo/pkg/signals"
+	"github.com/stefanprodan/podinfo/pkg/version"
+)
+
+func main() {
+	// flags definition
+	fs := pflag.NewFlagSet("default", pflag.ContinueOnError)
+	fs.String("host", "", "Host to bind service to")
+	fs.Int("port", 9898, "HTTP port to bind service to")
+	fs.Int("secure-port", 0, "HTTPS port")
+	fs.Int("port-metrics", 0, "metrics port")
+	fs.Int("grpc-port", 0, "gRPC port")
+	fs.String("grpc-service-name", "podinfo", "gPRC service name")
+	fs.String("level", "info", "log level debug, info, warn, error, flat or panic")
+	fs.StringSlice("backend-url", []string{}, "backend service URL")
+	fs.Duration("http-client-timeout", 2*time.Minute, "client timeout duration")
+	fs.Duration("http-server-timeout", 30*time.Second, "server read and write timeout duration")
+	fs.Duration("http-server-shutdown-timeout", 5*time.Second, "server graceful shutdown timeout duration")
+	fs.String("data-path", "/data", "data local path")
+	fs.String("config-path", "", "config dir path")
+	fs.String("cert-path", "/data/cert", "certificate path for HTTPS port")
+	fs.String("config", "config.yaml", "config file name")
+	fs.String("ui-path", "./ui", "UI local path")
+	fs.String("ui-logo", "", "UI logo")
+	fs.String("ui-color", "#34577c", "UI color")
+	fs.String("ui-message", fmt.Sprintf("greetings from podinfo v%v", version.VERSION), "UI message")
+	fs.Bool("h2c", false, "allow upgrading to H2C")
+	fs.Bool("random-delay", false, "between 0 and 5 seconds random delay by default")
+	fs.String("random-delay-unit", "s", "either s(seconds) or ms(milliseconds")
+	fs.Int("random-delay-min", 0, "min for random delay: 0 by default")
+	fs.Int("random-delay-max", 5, "max for random delay: 5 by default")
+	fs.Bool("random-error", false, "1/3 chances of a random response error")
+	fs.Bool("unhealthy", false, "when set, healthy state is never reached")
+	fs.Bool("unready", false, "when set, ready state is never reached")
+	fs.Int("stress-cpu", 0, "number of CPU cores with 100 load")
+	fs.Int("stress-memory", 0, "MB of data to load into memory")
+	fs.String("cache-server", "", "Redis address in the format <host>:<port>")
+
+	versionFlag := fs.BoolP("version", "v", false, "get version number")
+
+	// parse flags
+	err := fs.Parse(os.Args[1:])
+	switch {
+	case err == pflag.ErrHelp:
+		os.Exit(0)
+	case err != nil:
+		fmt.Fprintf(os.Stderr, "Error: %s\n\n", err.Error())
+		fs.PrintDefaults()
+		os.Exit(2)
+	case *versionFlag:
+		fmt.Println(version.VERSION)
+		os.Exit(0)
+	}
+
+	// bind flags and environment variables
+	viper.BindPFlags(fs)
+	viper.RegisterAlias("backendUrl", "backend-url")
+	hostname, _ := os.Hostname()
+	viper.SetDefault("jwt-secret", "eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9")
+	viper.SetDefault("ui-logo", "https://raw.githubusercontent.com/stefanprodan/podinfo/gh-pages/cuddle_clap.gif")
+	viper.Set("hostname", hostname)
+	viper.Set("version", version.VERSION)
+	viper.Set("revision", version.REVISION)
+	viper.SetEnvPrefix("PODINFO")
+	viper.SetEnvKeyReplacer(strings.NewReplacer("-", "_"))
+	viper.AutomaticEnv()
+
+	// load config from file
+	if _, fileErr := os.Stat(filepath.Join(viper.GetString("config-path"), viper.GetString("config"))); fileErr == nil {
+		viper.SetConfigName(strings.Split(viper.GetString("config"), ".")[0])
+		viper.AddConfigPath(viper.GetString("config-path"))
+		if readErr := viper.ReadInConfig(); readErr != nil {
+			fmt.Printf("Error reading config file, %v\n", readErr)
+		}
+	}
+
+	// configure logging
+	logger, _ := initZap(viper.GetString("level"))
+	defer logger.Sync()
+	stdLog := zap.RedirectStdLog(logger)
+	defer stdLog()
+
+	// start stress tests if any
+	beginStressTest(viper.GetInt("stress-cpu"), viper.GetInt("stress-memory"), logger)
+
+	// validate port
+	if _, err := strconv.Atoi(viper.GetString("port")); err != nil {
+		port, _ := fs.GetInt("port")
+		viper.Set("port", strconv.Itoa(port))
+	}
+
+	// validate secure port
+	if _, err := strconv.Atoi(viper.GetString("secure-port")); err != nil {
+		securePort, _ := fs.GetInt("secure-port")
+		viper.Set("secure-port", strconv.Itoa(securePort))
+	}
+
+	// validate random delay options
+	if viper.GetInt("random-delay-max") < viper.GetInt("random-delay-min") {
+		logger.Panic("`--random-delay-max` should be greater than `--random-delay-min`")
+	}
+
+	switch delayUnit := viper.GetString("random-delay-unit"); delayUnit {
+	case
+		"s",
+		"ms":
+		break
+	default:
+		logger.Panic("`random-delay-unit` accepted values are: s|ms")
+	}
+
+	// load gRPC server config
+	var grpcCfg grpc.Config
+	if err := viper.Unmarshal(&grpcCfg); err != nil {
+		logger.Panic("config unmarshal failed", zap.Error(err))
+	}
+
+	// start gRPC server
+	if grpcCfg.Port > 0 {
+		grpcSrv, _ := grpc.NewServer(&grpcCfg, logger)
+		go grpcSrv.ListenAndServe()
+	}
+
+	// load HTTP server config
+	var srvCfg api.Config
+	if err := viper.Unmarshal(&srvCfg); err != nil {
+		logger.Panic("config unmarshal failed", zap.Error(err))
+	}
+
+	// log version and port
+	logger.Info("Starting podinfo",
+		zap.String("version", viper.GetString("version")),
+		zap.String("revision", viper.GetString("revision")),
+		zap.String("port", srvCfg.Port),
+	)
+
+	// start HTTP server
+	srv, _ := api.NewServer(&srvCfg, logger)
+	stopCh := signals.SetupSignalHandler()
+	srv.ListenAndServe(stopCh)
+}
+
+func initZap(logLevel string) (*zap.Logger, error) {
+	level := zap.NewAtomicLevelAt(zapcore.InfoLevel)
+	switch logLevel {
+	case "debug":
+		level = zap.NewAtomicLevelAt(zapcore.DebugLevel)
+	case "info":
+		level = zap.NewAtomicLevelAt(zapcore.InfoLevel)
+	case "warn":
+		level = zap.NewAtomicLevelAt(zapcore.WarnLevel)
+	case "error":
+		level = zap.NewAtomicLevelAt(zapcore.ErrorLevel)
+	case "fatal":
+		level = zap.NewAtomicLevelAt(zapcore.FatalLevel)
+	case "panic":
+		level = zap.NewAtomicLevelAt(zapcore.PanicLevel)
+	}
+
+	zapEncoderConfig := zapcore.EncoderConfig{
+		TimeKey:        "ts",
+		LevelKey:       "level",
+		NameKey:        "logger",
+		CallerKey:      "caller",
+		MessageKey:     "msg",
+		StacktraceKey:  "stacktrace",
+		LineEnding:     zapcore.DefaultLineEnding,
+		EncodeLevel:    zapcore.LowercaseLevelEncoder,
+		EncodeTime:     zapcore.ISO8601TimeEncoder,
+		EncodeDuration: zapcore.SecondsDurationEncoder,
+		EncodeCaller:   zapcore.ShortCallerEncoder,
+	}
+
+	zapConfig := zap.Config{
+		Level:       level,
+		Development: false,
+		Sampling: &zap.SamplingConfig{
+			Initial:    100,
+			Thereafter: 100,
+		},
+		Encoding:         "json",
+		EncoderConfig:    zapEncoderConfig,
+		OutputPaths:      []string{"stderr"},
+		ErrorOutputPaths: []string{"stderr"},
+	}
+
+	return zapConfig.Build()
+}
+
+var stressMemoryPayload []byte
+
+func beginStressTest(cpus int, mem int, logger *zap.Logger) {
+	done := make(chan int)
+	if cpus > 0 {
+		logger.Info("starting CPU stress", zap.Int("cores", cpus))
+		for i := 0; i < cpus; i++ {
+			go func() {
+				for {
+					select {
+					case <-done:
+						return
+					default:
+
+					}
+				}
+			}()
+		}
+	}
+
+	if mem > 0 {
+		path := "/tmp/podinfo.data"
+		f, err := os.Create(path)
+
+		if err != nil {
+			logger.Error("memory stress failed", zap.Error(err))
+		}
+
+		if err := f.Truncate(1000000 * int64(mem)); err != nil {
+			logger.Error("memory stress failed", zap.Error(err))
+		}
+
+		stressMemoryPayload, err = ioutil.ReadFile(path)
+		f.Close()
+		os.Remove(path)
+		if err != nil {
+			logger.Error("memory stress failed", zap.Error(err))
+		}
+		logger.Info("starting CPU stress", zap.Int("memory", len(stressMemoryPayload)))
+	}
+}

deploy/README.md

@@ -0,0 +1,45 @@
+# Deploy demo webapp
+
+Demo webapp manifests:
+
+- [common](webapp/common)
+- [frontend](webapp/frontend)
+- [backend](webapp/backend)
+
+Deploy the demo in `webapp` namespace:
+
+```bash
+kubectl apply -f ./webapp/common
+kubectl apply -f ./webapp/backend
+kubectl apply -f ./webapp/frontend
+```
+
+Deploy the demo in the `dev` namespace:
+
+```bash
+kustomize build ./overlays/dev | kubectl apply -f-
+```
+
+Deploy the demo in the `staging` namespace:
+
+```bash
+kustomize build ./overlays/staging | kubectl apply -f-
+```
+
+Deploy the demo in the `production` namespace:
+
+```bash
+kustomize build ./overlays/production | kubectl apply -f-
+```
+
+## Testing Locally Using Kind
+
+> NOTE: You can install [kind from here](https://kind.sigs.k8s.io/docs/user/quick-start/#installation)
+
+The following will create a new cluster called "podinfo" and configure host ports on 80 and 443. You can access the
+endpoints on localhost. The example also deploys cert-manager within the cluster along with a self-signed cluster issuer
+used to generate the certificate to validate the secure port.
+
+```sh
+./kind.sh
+```

deploy/bases/backend/deployment.yaml

@@ -0,0 +1,73 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: backend
+    spec:
+      containers:
+      - name: backend
+        image: ghcr.io/stefanprodan/podinfo:6.0.1
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --grpc-port=9999
+        - --grpc-service-name=backend
+        - --level=info
+        - --cache-server=cache:6379
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 2000m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/bases/backend/hpa.yaml

@@ -0,0 +1,18 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: backend
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: backend
+  minReplicas: 1
+  maxReplicas: 2
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/bases/backend/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - service.yaml
+  - deployment.yaml
+  - hpa.yaml
+

deploy/bases/backend/service.yaml

@@ -0,0 +1,17 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: backend
+spec:
+  type: ClusterIP
+  selector:
+    app: backend
+  ports:
+    - name: http
+      port: 9898
+      protocol: TCP
+      targetPort: http
+    - port: 9999
+      targetPort: grpc
+      protocol: TCP
+      name: grpc

deploy/bases/cache/deployment.yaml

@@ -0,0 +1,57 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: cache
+spec:
+  selector:
+    matchLabels:
+      app: cache
+  template:
+    metadata:
+      labels:
+        app: cache
+    spec:
+      containers:
+        - name: redis
+          image: redis:6.0.1
+          imagePullPolicy: IfNotPresent
+          command:
+            - redis-server
+            - "/redis-master/redis.conf"
+          ports:
+            - name: redis
+              containerPort: 6379
+              protocol: TCP
+          livenessProbe:
+            tcpSocket:
+              port: redis
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          readinessProbe:
+            exec:
+              command:
+                - redis-cli
+                - ping
+            initialDelaySeconds: 5
+            timeoutSeconds: 5
+          resources:
+            limits:
+              cpu: 1000m
+              memory: 128Mi
+            requests:
+              cpu: 100m
+              memory: 32Mi
+          volumeMounts:
+            - mountPath: /var/lib/redis
+              name: data
+            - mountPath: /redis-master
+              name: config
+      volumes:
+        - name: data
+          emptyDir: {}
+        - name: config
+          configMap:
+            name: redis-config
+            items:
+              - key: redis.conf
+                path: redis.conf

deploy/bases/cache/kustomization.yaml

@@ -0,0 +1,9 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - service.yaml
+  - deployment.yaml
+configMapGenerator:
+  - name: redis-config
+    files:
+      - redis.conf

deploy/bases/cache/redis.conf

@@ -0,0 +1,4 @@
+maxmemory 64mb
+maxmemory-policy allkeys-lru
+save ""
+appendonly no

deploy/bases/cache/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: cache
+spec:
+  type: ClusterIP
+  selector:
+    app: cache
+  ports:
+    - name: redis
+      port: 6379
+      protocol: TCP
+      targetPort: redis

deploy/bases/frontend/deployment.yaml

@@ -0,0 +1,72 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: frontend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: frontend
+    spec:
+      containers:
+      - name: frontend
+        image: ghcr.io/stefanprodan/podinfo:6.0.1
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --level=info
+        - --backend-url=http://backend:9898/echo
+        - --cache-server=cache:6379
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 1000m
+            memory: 128Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/bases/frontend/hpa.yaml

@@ -0,0 +1,18 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: frontend
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: frontend
+  minReplicas: 1
+  maxReplicas: 4
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/bases/frontend/kustomization.yaml

@@ -0,0 +1,7 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+resources:
+  - service.yaml
+  - deployment.yaml
+  - hpa.yaml
+

deploy/bases/frontend/service.yaml

@@ -0,0 +1,13 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+spec:
+  type: ClusterIP
+  selector:
+    app: frontend
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: http

deploy/kind.sh

@@ -0,0 +1,48 @@
+#! /usr/bin/env sh
+
+mkdir -p bin
+cat > ./bin/kind.yaml <<EOF
+apiVersion: kind.x-k8s.io/v1alpha4
+kind: Cluster
+nodes:
+- role: control-plane
+  extraPortMappings:
+  - containerPort: 80
+    hostPort: 80
+    protocol: TCP
+  - containerPort: 443
+    hostPort: 443
+    protocol: TCP
+EOF
+
+# create the kind cluster
+kind create cluster --config=kind.yaml
+
+# add certificate manager
+kubectl apply -f https://github.com/jetstack/cert-manager/releases/download/v1.0.4/cert-manager.yaml
+
+# wait for cert manager
+kubectl rollout status --namespace cert-manager deployment/cert-manager --timeout=2m
+kubectl rollout status --namespace cert-manager deployment/cert-manager-webhook --timeout=2m
+kubectl rollout status --namespace cert-manager deployment/cert-manager-cainjector --timeout=2m
+
+# # apply the secure webapp
+kubectl apply -f ./secure/common
+kubectl apply -f ./secure/backend
+kubectl apply -f ./secure/frontend
+
+# # wait for the podinfo frontend to come up
+kubectl rollout status --namespace secure deployment/frontend --timeout=1m
+
+# curl the endpoints (responds with info due to header regexp on route handler)
+echo
+echo "http enpdoint:"
+echo "curl http://localhost"
+echo
+curl http://localhost
+
+echo
+echo "https (secure) enpdoint:"
+echo "curl --insecure https://localhost"
+echo
+curl --insecure https://localhost

deploy/overlays/dev/kustomization.yaml

@@ -0,0 +1,10 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: dev
+resources:
+  - ../../bases/backend
+  - ../../bases/frontend
+  - ../../bases/cache
+  - namespace.yaml
+transformers:
+  - labels.yaml

deploy/overlays/dev/labels.yaml

@@ -0,0 +1,10 @@
+apiVersion: builtin
+kind: LabelTransformer
+metadata:
+  name: labels
+labels:
+  env: dev
+  instance: webapp
+fieldSpecs:
+  - path: metadata/labels
+    create: true

deploy/overlays/dev/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: dev

deploy/overlays/production/kustomization.yaml

@@ -0,0 +1,10 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: production
+resources:
+  - ../../bases/backend
+  - ../../bases/frontend
+  - ../../bases/cache
+  - namespace.yaml
+transformers:
+  - labels.yaml

deploy/overlays/production/labels.yaml

@@ -0,0 +1,10 @@
+apiVersion: builtin
+kind: LabelTransformer
+metadata:
+  name: labels
+labels:
+  env: production
+  instance: webapp
+fieldSpecs:
+  - path: metadata/labels
+    create: true

deploy/overlays/production/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: production

deploy/overlays/staging/kustomization.yaml

@@ -0,0 +1,10 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: staging
+resources:
+  - ../../bases/backend
+  - ../../bases/frontend
+  - ../../bases/cache
+  - namespace.yaml
+transformers:
+  - labels.yaml

deploy/overlays/staging/labels.yaml

@@ -0,0 +1,10 @@
+apiVersion: builtin
+kind: LabelTransformer
+metadata:
+  name: labels
+labels:
+  env: staging
+  instance: webapp
+fieldSpecs:
+  - path: metadata/labels
+    create: true

deploy/overlays/staging/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: staging

deploy/secure/backend/deployment.yaml

@@ -0,0 +1,74 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+  namespace: secure
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: backend
+    spec:
+      serviceAccountName: secure
+      containers:
+      - name: backend
+        image: ghcr.io/stefanprodan/podinfo:5.0.3
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --grpc-port=9999
+        - --grpc-service-name=backend
+        - --level=info
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 2000m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/secure/backend/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: backend
+  namespace: secure
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: backend
+  minReplicas: 1
+  maxReplicas: 2
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/secure/backend/service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: backend
+  namespace: secure
+spec:
+  type: ClusterIP
+  selector:
+    app: backend
+  ports:
+    - name: http
+      port: 9898
+      protocol: TCP
+      targetPort: http
+    - port: 9999
+      targetPort: grpc
+      protocol: TCP
+      name: grpc

deploy/secure/common/cluster-issuer.yaml

@@ -0,0 +1,6 @@
+apiVersion: cert-manager.io/v1
+kind: ClusterIssuer
+metadata:
+  name: self-signed
+spec:
+  selfSigned: {}

deploy/secure/common/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: secure

deploy/secure/common/reconciler-rbac.yaml

@@ -0,0 +1,29 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: reconciler
+  namespace: secure
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: reconciler
+  namespace: secure
+rules:
+  - apiGroups: ['*']
+    resources: ['*']
+    verbs: ['*']
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: reconciler
+  namespace: secure
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: reconciler
+subjects:
+  - kind: ServiceAccount
+    name: reconciler
+    namespace: secure

deploy/secure/common/service-account.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: secure
+  namespace: secure

deploy/secure/frontend/certificate.yaml

@@ -0,0 +1,15 @@
+apiVersion: cert-manager.io/v1
+kind: Certificate
+metadata:
+  name: podinfo-frontend
+  namespace: secure
+spec:
+  dnsNames:
+    - frontend
+    - frontend.secure
+    - frontend.secure.cluster.local
+    - localhost
+  secretName: podinfo-frontend-tls
+  issuerRef:
+    name: self-signed
+    kind: ClusterIssuer

deploy/secure/frontend/deployment.yaml

@@ -0,0 +1,95 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+  namespace: secure
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: frontend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: frontend
+    spec:
+      serviceAccountName: secure
+      volumes:
+      - name: tls
+        secret:
+          secretName: podinfo-frontend-tls
+      containers:
+      - name: frontend
+        image: deavon/podinfo:secure-port
+        imagePullPolicy: IfNotPresent
+        securityContext:
+          capabilities:
+            drop:
+              - ALL
+            add:
+              - NET_BIND_SERVICE
+          allowPrivilegeEscalation: true
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+          hostPort: 80
+        - name: https
+          containerPort: 9899
+          protocol: TCP
+          hostPort: 443
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        volumeMounts:
+        - name: tls
+          mountPath: /data/cert
+          readOnly: true
+        command:
+        - ./podinfo
+        - --port=9898
+        - --secure-port=9899
+        - --port-metrics=9797
+        - --level=info
+        - --cert-path=/data/cert
+        - --backend-url=http://backend:9898/echo
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 1000m
+            memory: 128Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/secure/frontend/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: frontend
+  namespace: secure
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: frontend
+  minReplicas: 1
+  maxReplicas: 4
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/secure/frontend/service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+  namespace: secure
+spec:
+  type: ClusterIP
+  selector:
+    app: frontend
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: http
+    - name: https
+      port: 443
+      protocol: TCP
+      targetPort: https

deploy/webapp/backend/deployment.yaml

@@ -0,0 +1,74 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: backend
+  namespace: webapp
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: backend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: backend
+    spec:
+      serviceAccountName: webapp
+      containers:
+      - name: backend
+        image: ghcr.io/stefanprodan/podinfo:6.0.1
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --grpc-port=9999
+        - --grpc-service-name=backend
+        - --level=info
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 2000m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/webapp/backend/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: backend
+  namespace: webapp
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: backend
+  minReplicas: 1
+  maxReplicas: 2
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/webapp/backend/service.yaml

@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: backend
+  namespace: webapp
+spec:
+  type: ClusterIP
+  selector:
+    app: backend
+  ports:
+    - name: http
+      port: 9898
+      protocol: TCP
+      targetPort: http
+    - port: 9999
+      targetPort: grpc
+      protocol: TCP
+      name: grpc

deploy/webapp/common/namespace.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: Namespace
+metadata:
+  name: webapp

deploy/webapp/common/reconciler-rbac.yaml

@@ -0,0 +1,29 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: reconciler
+  namespace: webapp
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: reconciler
+  namespace: webapp
+rules:
+  - apiGroups: ['*']
+    resources: ['*']
+    verbs: ['*']
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: reconciler
+  namespace: webapp
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: reconciler
+subjects:
+  - kind: ServiceAccount
+    name: reconciler
+    namespace: webapp

deploy/webapp/common/service-account.yaml

@@ -0,0 +1,5 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: webapp
+  namespace: webapp

deploy/webapp/frontend/deployment.yaml

@@ -0,0 +1,73 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: frontend
+  namespace: webapp
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: frontend
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: frontend
+    spec:
+      serviceAccountName: webapp
+      containers:
+      - name: frontend
+        image: ghcr.io/stefanprodan/podinfo:6.0.1
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --level=info
+        - --backend-url=http://backend:9898/echo
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 1000m
+            memory: 128Mi
+          requests:
+            cpu: 100m
+            memory: 32Mi

deploy/webapp/frontend/hpa.yaml

@@ -0,0 +1,19 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: frontend
+  namespace: webapp
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: backend
+  minReplicas: 1
+  maxReplicas: 4
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        averageUtilization: 99

deploy/webapp/frontend/service.yaml

@@ -0,0 +1,14 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: frontend
+  namespace: webapp
+spec:
+  type: ClusterIP
+  selector:
+    app: frontend
+  ports:
+    - name: http
+      port: 80
+      protocol: TCP
+      targetPort: http

go.mod

@@ -0,0 +1,24 @@
+module github.com/stefanprodan/podinfo
+
+go 1.16
+
+require (
+	github.com/alecthomas/template v0.0.0-20190718012654-fb15b899a751
+	github.com/chzyer/readline v0.0.0-20180603132655-2972be24d48e
+	github.com/dgrijalva/jwt-go/v4 v4.0.0-preview1
+	github.com/fatih/color v1.9.0
+	github.com/fsnotify/fsnotify v1.4.9
+	github.com/gomodule/redigo v1.8.4
+	github.com/gorilla/mux v1.8.0
+	github.com/gorilla/websocket v1.4.2
+	github.com/mattn/go-isatty v0.0.12 // indirect
+	github.com/prometheus/client_golang v1.11.0
+	github.com/spf13/cobra v1.2.1
+	github.com/spf13/pflag v1.0.5
+	github.com/spf13/viper v1.8.1
+	github.com/swaggo/http-swagger v1.0.0
+	github.com/swaggo/swag v1.7.0
+	go.uber.org/zap v1.19.1
+	golang.org/x/net v0.0.0-20210405180319-a5a99cb37ef4
+	google.golang.org/grpc v1.38.0
+)

go.sum

@@ -0,0 +1,751 @@
+cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
+cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
+cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
+cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
+cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
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kustomize/deployment.yaml

@@ -0,0 +1,74 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: podinfo
+spec:
+  minReadySeconds: 3
+  revisionHistoryLimit: 5
+  progressDeadlineSeconds: 60
+  strategy:
+    rollingUpdate:
+      maxUnavailable: 0
+    type: RollingUpdate
+  selector:
+    matchLabels:
+      app: podinfo
+  template:
+    metadata:
+      annotations:
+        prometheus.io/scrape: "true"
+        prometheus.io/port: "9797"
+      labels:
+        app: podinfo
+    spec:
+      containers:
+      - name: podinfod
+        image: ghcr.io/stefanprodan/podinfo:6.0.1
+        imagePullPolicy: IfNotPresent
+        ports:
+        - name: http
+          containerPort: 9898
+          protocol: TCP
+        - name: http-metrics
+          containerPort: 9797
+          protocol: TCP
+        - name: grpc
+          containerPort: 9999
+          protocol: TCP
+        command:
+        - ./podinfo
+        - --port=9898
+        - --port-metrics=9797
+        - --grpc-port=9999
+        - --grpc-service-name=podinfo
+        - --level=info
+        - --random-delay=false
+        - --random-error=false
+        env:
+        - name: PODINFO_UI_COLOR
+          value: "#34577c"
+        livenessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/healthz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        readinessProbe:
+          exec:
+            command:
+            - podcli
+            - check
+            - http
+            - localhost:9898/readyz
+          initialDelaySeconds: 5
+          timeoutSeconds: 5
+        resources:
+          limits:
+            cpu: 2000m
+            memory: 512Mi
+          requests:
+            cpu: 100m
+            memory: 64Mi

kustomize/hpa.yaml

@@ -0,0 +1,20 @@
+apiVersion: autoscaling/v2beta2
+kind: HorizontalPodAutoscaler
+metadata:
+  name: podinfo
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: podinfo
+  minReplicas: 2
+  maxReplicas: 4
+  metrics:
+  - type: Resource
+    resource:
+      name: cpu
+      target:
+        type: Utilization
+        # scale up if usage is above
+        # 99% of the requested CPU (100m)
+        averageUtilization: 99