Add annotations, labels and documenation to support helm3

Signed-off-by: faizanahmad055 <faizan.ahmad55@outlook.com>

README.md

@@ -192,26 +192,26 @@ namespace: reloader
 
 ### Helm Charts
 
-Alternatively if you have configured helm on your cluster, you can add reloader to helm from our public chart repository and deploy it via helm using below mentioned commands
+Alternatively if you have configured helm on your cluster, you can add reloader to helm from our public chart repository and deploy it via helm using below mentioned commands. Follow [this](docs/Helm2-to-Helm3.md) guide, in case you have trouble migrating reloader from Helm2 to Helm3
 
 ```bash
 helm repo add stakater https://stakater.github.io/stakater-charts
 
 helm repo update
 
-helm install stakater/reloader
+helm install stakater/reloader # For helm3 add --generate-name flag or set the release name
 ```
 
 **Note:** The latest verion of reloader is using `apiVersion: rbac.authorization.k8s.io/v1` for rbac. The `apiVersion: rbac.authorization.k8s.io/v1beta1` is depreciated since kubernetes = 1.17. To run it with older versions, please use below command.
 
 ```bash
-helm install stakater/reloader --set reloader.legacy.rbac=true
+helm install stakater/reloader --set reloader.legacy.rbac=true # For helm3 add --generate-name flag or set the release name
 ```
 
 **Note:** By default reloader watches in all namespaces. To watch in single namespace, please run following command. It will install reloader in `test` namespace which will only watch `Deployments`, `Daemonsets` and `Statefulsets` in `test` namespace.
 
 ```bash
-helm install stakater/reloader --set reloader.watchGlobally=false --namespace test
+helm install stakater/reloader --set reloader.watchGlobally=false --namespace test # For helm3 add --generate-name flag or set the release name
 ```
 
 Reloader can be configured to ignore the resources `secrets` and `configmaps` by using the following parameters of `values.yaml` file:

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

@@ -25,6 +25,7 @@ app: {{ template "reloader-fullname" . }}
 chart: "{{ .Chart.Name }}-{{ .Chart.Version }}"
 release: {{ .Release.Name | quote }}
 heritage: {{ .Release.Service | quote }}
+app.kubernetes.io/managed-by: {{ .Release.Service | quote }}
 {{- end -}}
 
 {{/*
@@ -37,3 +38,11 @@ Create the name of the service account to use
     {{ default "default" .Values.reloader.serviceAccount.name }}
 {{- end -}}
 {{- end -}}
+
+{{/*
+Create the annotations to support helm3
+*/}}
+{{- define "reloader-helm3.annotations" -}}
+meta.helm.sh/release-namespace: {{ .Release.Namespace | quote }}
+meta.helm.sh/release-name: {{ .Release.Name | quote }}
+{{- end -}}

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

@@ -6,6 +6,8 @@ apiVersion: rbac.authorization.k8s.io/v1
 {{- end }}
 kind: ClusterRole
 metadata:
+  annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
   labels:
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.rbac.labels }}

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

@@ -6,6 +6,8 @@ apiVersion: rbac.authorization.k8s.io/v1
 {{- end }}
 kind: ClusterRoleBinding
 metadata:
+  annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
   labels:
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.rbac.labels }}

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

@@ -1,8 +1,9 @@
 apiVersion: apps/v1
 kind: Deployment
 metadata:
-{{- if .Values.reloader.deployment.annotations }}
   annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
+{{- if .Values.reloader.deployment.annotations }}
 {{ toYaml .Values.reloader.deployment.annotations | indent 4 }}
 {{- end }}
   labels:

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

@@ -6,6 +6,8 @@ apiVersion: rbac.authorization.k8s.io/v1
 {{- end }}
 kind: Role
 metadata:
+  annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
   labels:
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.rbac.labels }}

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

@@ -6,6 +6,8 @@ apiVersion: rbac.authorization.k8s.io/v1
 {{- end }}
 kind: RoleBinding
 metadata:
+  annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
   labels: 
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.rbac.labels }}

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

@@ -2,8 +2,9 @@
 apiVersion: v1
 kind: Service
 metadata:
-{{- if .Values.reloader.service.annotations }}
   annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
+{{- if .Values.reloader.service.annotations }}
 {{ toYaml .Values.reloader.service.annotations | indent 4 }}
 {{- end }}
   labels:

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

@@ -5,6 +5,8 @@ kind: ServiceAccount
 imagePullSecrets: {{ toYaml .Values.global.imagePullSecrets | nindent 2 }}
 {{- end }}
 metadata:
+  annotations:
+{{ include "reloader-helm3.annotations" . | indent 4 }}
   labels:
 {{ include "reloader-labels.chart" . | indent 4 }}
 {{- if .Values.reloader.serviceAccount.labels }}