feat: add helm chart

.github/workflows/release.yaml

@@ -62,3 +62,50 @@ jobs:
           dockerfile: Dockerfile
           tags: "latest,v${{ needs.semantic-release.outputs.release-version }}"
 
+
+  helm:
+    runs-on: ubuntu-latest
+    needs: [semantic-release, docker]
+    if: needs.semantic-release.outputs.new-release-published == 'true'
+    steps:
+      - uses: actions/checkout@ee0669bd1cc54295c223e0bb666b733df41de1c5 # v2.7.0
+      - name: Download yq
+        run: |
+          wget -nv -nc -O yq https://github.com/mikefarah/yq/releases/download/v4.20.2/yq_linux_amd64
+          chmod +x yq
+      - name: Set version
+        # Always use git tags as semantic release can fail due to rate limit
+        run: |
+          git fetch --prune --unshallow
+          echo "RELEASE_VERSION=$(git describe --abbrev=0 --tags | sed -e 's/^v//')" >> $GITHUB_ENV
+      - name: Update chart version
+        run: ./yq -i e '.version = "${{ env.RELEASE_VERSION }}"' chart/Chart.yaml
+      - name: Update app version
+        run: ./yq -i e '.appVersion = "${{ env.RELEASE_VERSION }}"' chart/Chart.yaml
+      - name: Update image tags
+        run: ./yq -i e '.image.tag = "v${{ env.RELEASE_VERSION }}"' chart/values.yaml
+      - name: Set up Helm
+        uses: azure/setup-helm@18bc76811624f360dbd7f18c2d4ecb32c7b87bab # v1.1
+        with:
+          version: v3.8.0
+      - name: Package Helm chart
+        run: |
+          helm package ./chart
+      - name: Clone charts repo
+        uses: actions/checkout@8e5e7e5ab8b370d6c329ec480221332ada57f0ab # v3.5.2
+        with:
+          repository: "${{ github.repository_owner }}/charts"
+          path: charts
+          token: "${{ secrets.FLANKBOT }}"
+      - name: Update chart repo
+        run: |
+          cd charts
+          cp ../batch-runner-*.tgz ./
+          helm repo index --merge index.yaml .
+      - name: Push changes to chart repo
+        uses: stefanzweifel/git-auto-commit-action@3ea6ae190baf489ba007f7c92608f33ce20ef04a # v4.16.0
+        with:
+          commit_message: "Release ${{ needs.semantic-release.outputs.release-version }} of ${{ github.repository }}"
+          branch: gh-pages
+          repository: ./charts
+

chart/Chart.yaml

@@ -0,0 +1,6 @@
+apiVersion: v2
+name: batch-runner
+description: A Helm chart for creating pods or jobs for every message in a queue
+type: application
+version: 0.1.0
+appVersion: "1.0.0"

chart/templates/_helpers.tpl

@@ -0,0 +1,62 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "batch-runner.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 "batch-runner.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 "batch-runner.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "batch-runner.labels" -}}
+helm.sh/chart: {{ include "batch-runner.chart" . }}
+{{ include "batch-runner.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "batch-runner.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "batch-runner.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "batch-runner.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "batch-runner.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}

chart/templates/deployment.yaml

@@ -0,0 +1,21 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "batch-runner.fullname" . }}
+  labels:
+    {{- include "batch-runner.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "batch-runner.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "batch-runner.selectorLabels" . | nindent 8 }}
+    spec:
+      serviceAccountName: {{ include "batch-runner.serviceAccountName" . }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}

chart/templates/serviceaccount.yaml

@@ -0,0 +1,37 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "batch-runner.serviceAccountName" . }}
+  labels:
+    {{- include "batch-runner.labels" . | nindent 4 }}
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: batch-runner-role
+  labels:
+    {{- include "batch-runner.labels" . | nindent 4 }}
+rules:
+- apiGroups: [""]
+  resources: ["pods"]
+  verbs: ["*"]
+- apiGroups: ["batch/v1"]
+  resources: ["jobs"]
+  verbs: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: batch-runner-binding
+  labels:
+    {{- include "batch-runner.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: batch-runner-role
+subjects:
+- kind: ServiceAccount
+  name: {{ include "batch-runner.serviceAccountName" . }}
+  namespace: {{ .Release.Namespace }}
+{{- end }}

chart/values.yaml

@@ -0,0 +1,9 @@
+replicaCount: 1
+image:
+  repository: flanksource/batch-runner
+  tag: latest
+  pullPolicy: IfNotPresent
+
+serviceAccount:
+  create: true
+  name: batch-runner-sa