Add helm chart

.github/workflows/lint-test-chart.yaml

@@ -0,0 +1,48 @@
+name: Lint and Test Chart
+
+on:
+  pull_request:
+    paths:
+      - "charts/external-dns/**"
+
+jobs:
+  lint-test:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Set up Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.6.3
+
+      - name: Set up Python
+        uses: actions/setup-python@v2
+        with:
+          python-version: 3.7
+
+      - name: Set up chart-testing
+        uses: helm/[email protected]
+
+      - name: Run chart-testing (list-changed)
+        id: list-changed
+        run: |
+          changed=$(ct list-changed)
+          if [[ -n "$changed" ]]; then
+            echo "::set-output name=changed::true"
+          fi
+
+      - name: Run chart-testing (lint)
+        run: ct lint
+
+      - name: Create Kind cluster
+        uses: helm/[email protected]
+        with:
+          wait: 120s
+        if: steps.list-changed.outputs.changed == 'true'
+
+      - name: Run chart-testing (install)
+        run: ct install

.github/workflows/release-chart.yaml

@@ -0,0 +1,33 @@
+name: Release Chart
+
+on:
+  push:
+    branches:
+      - master
+    paths:
+      - "charts/external-dns/**"
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v2
+        with:
+          fetch-depth: 0
+
+      - name: Configure Git
+        run: |
+          git config user.name "$GITHUB_ACTOR"
+          git config user.email "[email protected]"
+
+      - name: Install Helm
+        uses: azure/setup-helm@v1
+        with:
+          version: v3.6.3
+
+      - name: Run chart-releaser
+        uses: helm/[email protected]
+        env:
+          CR_TOKEN: "${{ secrets.GITHUB_TOKEN }}"
+          CR_RELEASE_NAME_TEMPLATE: "external-dns-helm-chart-{{ .Version }}"

.gitignore

@@ -50,4 +50,7 @@ vendor/
 profile.cov
 
 # github codespaces
-.venv/
+.venv/
+
+# Helm charts
+!/charts/external-dns/

charts/external-dns/.helmignore

@@ -0,0 +1,23 @@
+# 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
+*.orig
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj
+.vscode/

charts/external-dns/Chart.yaml

@@ -0,0 +1,21 @@
+apiVersion: v2
+name: external-dns
+description: ExternalDNS synchronizes exposed Kubernetes Services and Ingresses with DNS providers.
+type: application
+version: 1.2.0
+appVersion: 0.9.0
+keywords:
+  - kubernetes
+  - external-dns
+  - dns
+home: https://github.com/kubernetes-sigs/external-dns/
+icon: https://github.com/kubernetes-sigs/external-dns/raw/master/img/external-dns.png
+sources:
+  - https://github.com/kubernetes-sigs/external-dns/
+maintainers:
+  - name: stevehipwell
+    email: [email protected]
+annotations:
+  artifacthub.io/changes: |
+    - kind: added
+      description: Initial official release.

charts/external-dns/templates/NOTES.txt

@@ -0,0 +1,7 @@
+***********************************************************************
+* External DNS                                                        *
+***********************************************************************
+  Chart version: {{ .Chart.Version }}
+  App version:   {{ .Chart.AppVersion }}
+  Image tag:     {{ include "external-dns.image" . }}
+***********************************************************************

charts/external-dns/templates/_helpers.tpl

@@ -0,0 +1,69 @@
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "external-dns.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 "external-dns.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 "external-dns.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" }}
+{{- end }}
+
+{{/*
+Common labels
+*/}}
+{{- define "external-dns.labels" -}}
+helm.sh/chart: {{ include "external-dns.chart" . }}
+{{ include "external-dns.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end }}
+
+{{/*
+Selector labels
+*/}}
+{{- define "external-dns.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "external-dns.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end }}
+
+{{/*
+Create the name of the service account to use
+*/}}
+{{- define "external-dns.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create }}
+{{- default (include "external-dns.fullname" .) .Values.serviceAccount.name }}
+{{- else }}
+{{- default "default" .Values.serviceAccount.name }}
+{{- end }}
+{{- end }}
+
+{{/*
+The image to use
+*/}}
+{{- define "external-dns.image" -}}
+{{- printf "%s:%s" .Values.image.repository (default (printf "v%s" .Chart.AppVersion) .Values.image.tag) }}
+{{- end }}

charts/external-dns/templates/clusterrole.yaml

@@ -0,0 +1,18 @@
+{{- if .Values.rbac.create -}}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ template "external-dns.fullname" . }}
+  labels:
+    {{- include "external-dns.labels" . | nindent 4 }}
+rules:
+  - apiGroups: [""]
+    resources: ["services","endpoints","pods"]
+    verbs: ["get","watch","list"]
+  - apiGroups: ["extensions","networking.k8s.io"]
+    resources: ["ingresses"]
+    verbs: ["get","watch","list"]
+  - apiGroups: [""]
+    resources: ["nodes"]
+    verbs: ["list","watch"]
+{{- end }}

charts/external-dns/templates/clusterrolebinding.yaml

@@ -0,0 +1,16 @@
+{{- if .Values.rbac.create -}}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ printf "%s-viewer" (include "external-dns.fullname" .) }}
+  labels:
+    {{- include "external-dns.labels" . | nindent 4 }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: ClusterRole
+  name: {{ template "external-dns.fullname" . }}
+subjects:
+  - kind: ServiceAccount
+    name: {{ template "external-dns.serviceAccountName" . }}
+    namespace: {{ .Release.Namespace }}
+{{- end }}

charts/external-dns/templates/deployment.yaml

@@ -0,0 +1,108 @@
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "external-dns.fullname" . }}
+  labels:
+    {{- include "external-dns.labels" . | nindent 4 }}
+spec:
+  replicas: 1
+  selector:
+    matchLabels:
+      {{- include "external-dns.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "external-dns.selectorLabels" . | nindent 8 }}
+      {{- with .Values.podLabels }}
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "external-dns.serviceAccountName" . }}
+      {{- with .Values.podSecurityContext }}
+      securityContext:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.priorityClassName }}
+      priorityClassName: {{ . | quote }}
+      {{- end }}
+      {{- with .Values.terminationGracePeriodSeconds }}
+      terminationGracePeriodSeconds: {{ . }}
+      {{- end }}
+      containers:
+        - name: external-dns
+          {{- with .Values.securityContext }}
+          securityContext:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          image: {{ include "external-dns.image" . }}
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          {{- with .Values.env }}
+          env:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          args:
+            - --log-level={{ .Values.logLevel }}
+            - --log-format={{ .Values.logFormat }}
+            - --interval={{ .Values.interval }}
+            {{- if .Values.triggerLoopOnEvent }}
+            - --events
+            {{- end }}
+            {{- range .Values.sources }}
+            - --source={{ . }}
+            {{- end }}
+            - --policy={{ .Values.policy }}
+            {{- if eq .Values.registry "txt" }}
+            {{- if .Values.txtOwnerId }}
+            - --txt-owner-id={{ .Values.txtOwnerId }}
+            {{- end }}
+            {{- if .Values.txtPrefix }}
+            - --txt-prefix={{ .Values.txtPrefix }}
+            {{- end }}
+            {{- end }}
+            {{- range .Values.domainFilters }}
+            - --domain-filter={{ . }}
+            {{- end }}
+            - --provider={{ .Values.provider }}
+          {{- range .Values.extraArgs }}
+            - {{ . }}
+          {{- end }}
+          ports:
+            - name: http
+              protocol: TCP
+              containerPort: 7979
+          livenessProbe:
+            {{- toYaml .Values.livenessProbe | nindent 12 }}
+          readinessProbe:
+            {{- toYaml .Values.readinessProbe | nindent 12 }}
+          {{- with .Values.extraVolumeMounts }}
+          volumeMounts:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+          {{- with .Values.resources }}
+          resources:
+            {{- toYaml . | nindent 12 }}
+          {{- end }}
+      {{- with .Values.extraVolumes }}
+      volumes:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

charts/external-dns/templates/service.yaml

@@ -0,0 +1,15 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "external-dns.fullname" . }}
+  labels:
+    {{- include "external-dns.labels" . | nindent 4 }}
+spec:
+  type: ClusterIP
+  selector:
+    {{- include "external-dns.selectorLabels" . | nindent 4 }}
+  ports:
+    - name: http
+      port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP

charts/external-dns/templates/serviceaccount.yaml

@@ -0,0 +1,12 @@
+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "external-dns.serviceAccountName" . }}
+  labels:
+    {{- include "external-dns.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}