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adding bluegreen
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‎charts/bluegreen/.helmignore

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

‎charts/bluegreen/Chart.yaml

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apiVersion: v2
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name: bluegreen
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description: A Helm chart for Kubernetes
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# A chart can be either an 'application' or a 'library' chart.
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#
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# Application charts are a collection of templates that can be packaged into versioned archives
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# to be deployed.
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#
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# Library charts provide useful utilities or functions for the chart developer. They're included as
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# a dependency of application charts to inject those utilities and functions into the rendering
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# pipeline. Library charts do not define any templates and therefore cannot be deployed.
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type: application
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# This is the chart version. This version number should be incremented each time you make changes
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# to the chart and its templates, including the app version.
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# Versions are expected to follow Semantic Versioning (https://semver.org/)
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version: 0.1.0
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# This is the version number of the application being deployed. This version number should be
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# incremented each time you make changes to the application. Versions are not expected to
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# follow Semantic Versioning. They should reflect the version the application is using.
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# It is recommended to use it with quotes.
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appVersion: "1.16.0"

‎charts/bluegreen/templates/_helpers.tpl

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

‎charts/bluegreen/templates/rollout.yaml

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# This example demonstrates a Rollout using the blue-green update strategy, which contains a manual
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# gate before promoting the new stack.
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apiVersion: argoproj.io/v1alpha1
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kind: Rollout
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metadata:
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name: {{ include "bluegreen.name" . }}
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namespace: {{ include "bluegreen.name" . }}
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annotations:
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argocd.argoproj.io/sync-wave: "2"
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spec:
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replicas: {{ .Values.replicaCount }}
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revisionHistoryLimit: {{ .Values.revisionHistoryLimit }}
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selector:
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matchLabels:
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app: {{ include "bluegreen.name" . }}
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template:
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metadata:
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labels:
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app: {{ include "bluegreen.name" . }}
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spec:
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containers:
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- name: {{ .Values.containers.name }}
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image: {{ .Values.global.rollout.image }}
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imagePullPolicy: {{ .Values.image.pullPolicy }}
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ports:
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- containerPort: {{ .Values.containers.containerPort }}
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strategy:
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blueGreen:
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# activeService specifies the service to update with the new template hash at time of promotion.
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# This field is mandatory for the blueGreen update strategy.
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activeService: {{ include "bluegreen.name" . }}-active
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# previewService specifies the service to update with the new template hash before promotion.
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# This allows the preview stack to be reachable without serving production traffic.
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# This field is optional.
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previewService: {{ include "bluegreen.name" . }}-preview
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# autoPromotionEnabled disables automated promotion of the new stack by pausing the rollout
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# immediately before the promotion. If omitted, the default behavior is to promote the new
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# stack as soon as the ReplicaSet are completely ready/available.
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# Rollouts can be resumed using: `kubectl argo rollouts promote ROLLOUT`
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autoPromotionEnabled: {{ .Values.strategy.blueGreen.autoPromotionEnabled }}
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‎charts/bluegreen/templates/route.yaml

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{{- range .Values.bluegreen }}
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---
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apiVersion: route.openshift.io/v1
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kind: Route
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metadata:
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labels:
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app: {{ $.Chart.Name }}-{{ .name }}
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name: {{ $.Chart.Name }}-{{ .name }}
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annotations:
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argocd.argoproj.io/sync-wave: "3"
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spec:
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port:
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targetPort: {{ $.Values.route.targetPort }}
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to:
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kind: {{ $.Values.route.kind }}
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name: {{ $.Chart.Name }}-{{ .name }}
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weight: {{ $.Values.route.weight }}
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wildcardPolicy: {{ $.Values.route.wildcardPolicy | default "None" }}
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{{- end }}

‎charts/bluegreen/templates/service.yaml

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{{- range .Values.bluegreen }}
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---
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kind: Service
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apiVersion: v1
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metadata:
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name: {{ $.Chart.Name }}-{{ .name }}
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annotations:
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argocd.argoproj.io/sync-wave: "1"
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spec:
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selector:
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app: {{ $.Chart.Name }}
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ports:
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- protocol: {{ $.Values.service.protocol }}
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port: {{ $.Values.service.port }}
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targetPort: {{ $.Values.service.targetPort }}
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{{- end }}

‎charts/bluegreen/templates/tests/test-connection.yaml

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apiVersion: v1
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kind: Pod
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metadata:
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name: "{{ include "bluegreen.fullname" . }}-test-connection"
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labels:
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{{- include "bluegreen.labels" . | nindent 4 }}
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annotations:
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"helm.sh/hook": test
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spec:
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containers:
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- name: wget
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image: busybox
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command: ['wget']
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args: ['{{ include "bluegreen.fullname" . }}:{{ .Values.service.port }}']
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restartPolicy: Never

‎charts/bluegreen/values.yaml

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global:
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rollout:
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image: argoproj/rollouts-demo:blue
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replicaCount: 2
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revisionHistoryLimit: 2
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bluegreen:
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- name: active
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- name: preview
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image:
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pullPolicy: Always
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containers:
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name: bluegreen-demo
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containerPort: 8080
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strategy:
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blueGreen:
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autoPromotionEnabled: false
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service:
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protocol: TCP
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port: 80
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targetPort: 8080
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route:
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kind: Service
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weight: 100
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targetPort: 8080
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wildcardPolicy: None

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