WIP helm chart

Signed-off-by: David Anderson <danderson@tailscale.com>

cmd/k8s-operator/chart/.helmignore

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+# 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/

cmd/k8s-operator/chart/Chart.yaml

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

cmd/k8s-operator/chart/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range $host := .Values.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $host.host }}{{ .path }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "chart.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "chart.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "chart.fullname" . }} --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}{{.}}{{ end }}"}}")
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- else if contains "ClusterIP" .Values.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace {{ .Release.Namespace }} -l "app.kubernetes.io/name={{ include "chart.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  export CONTAINER_PORT=$(kubectl get pod --namespace {{ .Release.Namespace }} $POD_NAME -o jsonpath="{.spec.containers[0].ports[0].containerPort}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:$CONTAINER_PORT
+{{- end }}

cmd/k8s-operator/chart/templates/_helpers.tpl

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

cmd/k8s-operator/chart/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "chart.fullname" . }}
+  namespace: {{ .Values.namespace }}
+  labels:
+    {{- include "chart.labels" . | nindent 4 }}
+spec:
+  replicas: 1 # Do not attempt to increase. It will not do what you want.
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      {{- include "chart.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "chart.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "chart.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      volumes:
+      - name: oauth
+        secret:
+          secretName: operator-oauth
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          resources:
+            {{- toYaml .Values.resources | nindent 12 }}
+      {{- with .Values.nodeSelector }}
+      nodeSelector:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.affinity }}
+      affinity:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      {{- with .Values.tolerations }}
+      tolerations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}

cmd/k8s-operator/chart/templates/namespace.yaml

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+apiVersion: v1
+kind: Namespace
+metadata:
+  name: {{ .Values.namespace }}

cmd/k8s-operator/chart/templates/rbac.yaml

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+
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: proxies
+  namespace: {{ .Values.namespace }}
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: proxies
+  namespace: {{ .Values.namespace }}
+subjects:
+- kind: ServiceAccount
+  name: proxies
+  namespace: {{ .Values.namespace }}
+roleRef:
+  kind: Role
+  name: proxies
+  apiGroup: rbac.authorization.k8s.io
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRole
+metadata:
+  name: {{ include "chart.fullname" . }}-operator
+rules:
+- apiGroups: [""]
+  resources: ["services", "services/status"]
+  verbs: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: ClusterRoleBinding
+metadata:
+  name: {{ include "chart.fullname" . }}-operator
+subjects:
+- kind: ServiceAccount
+  name: operator
+  namespace: {{ .Values.namespace }}
+roleRef:
+  kind: ClusterRole
+  name: {{ include "chart.fullname" . }}-operator
+  apiGroup: rbac.authorization.k8s.io
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+  name: operator
+  namespace: {{ .Values.namespace }}
+rules:
+- apiGroups: [""]
+  resources: ["secrets"]
+  verbs: ["*"]
+- apiGroups: ["apps"]
+  resources: ["statefulsets"]
+  verbs: ["*"]
+---
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: {{ include "chart.fullname" . }}-operator
+  namespace: {{ .Values.namespace }}
+subjects:
+- kind: ServiceAccount
+  name: {{ include "chart.fullname" . }}-operator
+  namespace: {{ .Values.namespace }}
+roleRef:
+  kind: Role
+  name: {{ include "chart.fullname" . }}-operator
+  apiGroup: rbac.authorization.k8s.io
+---
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: operator
+  namespace: tailscale
+spec:
+  replicas: 1
+  strategy:
+    type: Recreate
+  selector:
+    matchLabels:
+      app: operator
+  template:
+    metadata:
+      labels:
+        app: operator
+    spec:
+      serviceAccountName: operator
+      volumes:
+      - name: oauth
+        secret:
+          secretName: operator-oauth
+      containers:
+        - name: operator
+          image: tailscale/k8s-operator:latest
+          resources:
+            requests:
+              cpu: 500m
+              memory: 100Mi
+          env:
+            - name: OPERATOR_HOSTNAME
+              value: tailscale-operator
+            - name: OPERATOR_SECRET
+              value: operator
+            - name: OPERATOR_LOGGING
+              value: info
+            - name: OPERATOR_NAMESPACE
+              valueFrom:
+                fieldRef:
+                  fieldPath: metadata.namespace
+            - name: CLIENT_ID_FILE
+              value: /oauth/client_id
+            - name: CLIENT_SECRET_FILE
+              value: /oauth/client_secret
+            - name: PROXY_IMAGE
+              value: tailscale/tailscale:latest
+            - name: PROXY_TAGS
+              value: tag:k8s
+          volumeMounts:
+          - name: oauth
+            mountPath: /oauth
+            readOnly: true

cmd/k8s-operator/chart/templates/secret.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: operator-oauth
+  namespace: {{ .Values.namespace }}
+stringData:
+  client_id: # SET CLIENT ID HERE
+  client_secret: # SET CLIENT SECRET HERE

cmd/k8s-operator/chart/templates/serviceaccount.yaml

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+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: proxies
+  namespace: {{ .Values.namespace }}
+  labels:
+    {{- include "chart.labels" . | nindent 4 }}
+--
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: operator
+  namespace: {{ .Values.namespace }}
+  labels:
+    {{- include "chart.labels" . | nindent 4 }}

cmd/k8s-operator/chart/templates/tests/test-connection.yaml

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

cmd/k8s-operator/chart/values.yaml

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+# Default values for chart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+image:
+  repository: tailscale/k8s-operator
+  pullPolicy: IfNotPresent
+  tag: "v1.36.0"
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+namespace: "tailscale"
+
+tailscaleCredential:
+  clientID: "" # YOUR CLIENT ID MUST GO HERE
+  clientSecret: "" # YOUR CLIENT SECRET MUST GO HERE
+
+podAnnotations: {}
+
+podSecurityContext: {}
+
+securityContext: {}
+
+resources:
+  requests:
+    cpu: 500m
+    memory: 100Mi
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}