add chart and ci

.gitlab-ci.yml

+stages:
+  - build
+  - production
+
+include:
+  - ci/build.yaml
+  - ci/production.yaml
+
+.default-refs:
+  only:
+    refs:
+      - trunk
+      - merge_requests
+      - tags
+
+.deploy_helpers: &deploy_helpers |
+  function deploy() {
+    helm dependency update chart/
+
+    helm upgrade \
+        --install \
+        --atomic \
+        --set image.repository="$DEPLOY_IMAGE" \
+        --set image.tag="$DEPLOY_TAG" \
+        $HELM_ARGS \
+        --namespace="$KUBE_NAMESPACE" \
+        --create-namespace \
+        "$HELM_RELEASE_NAME" \
+        chart/
+  }
+
+  function delete_deployment() {
+    helm delete --namespace "$KUBE_NAMESPACE" "$HELM_RELEASE_NAME"
+  }
+
+.deploy:
+  image: dtzar/helm-kubectl:3.4.2
+  needs:
+    - build-app
+  variables:
+    DEPLOY_IMAGE: $CI_REGISTRY_IMAGE
+    DEPLOY_TAG: $CI_COMMIT_SHA
+  before_script:
+    - *deploy_helpers

Dockerfile

 FROM node:14-alpine
 
-RUN mkdir /data
-WORKDIR /data
+RUN mkdir -p /opt/thing
+WORKDIR /opt/thing
 
 COPY . .
 RUN npm i
 
-EXPOSE 3333
-
 CMD ["node", "main.js"]

chart/.helmignore

+# 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/

chart/Chart.yaml

+apiVersion: v2
+name: read-thing
+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"

chart/templates/NOTES.txt

+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 "read-thing.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "read-thing.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "read-thing.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 "read-thing.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 }}

chart/templates/_helpers.tpl

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

chart/templates/configmap-env.yaml

+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: {{ include "read-thing.fullname" . }}-env
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+data:
+  APP_ROOT: /opt/thing
+  CALLBACK: {{ .Values.readthing.callback }}
+  NODE_ENV: production
+  PORT: {{ .Values.readthing.port | quote }}

chart/templates/deployment.yaml

+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "read-thing.fullname" . }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+spec:
+  {{- if not .Values.autoscaling.enabled }}
+  replicas: {{ .Values.replicaCount }}
+  {{- end }}
+  selector:
+    matchLabels:
+      {{- include "read-thing.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      {{- with .Values.podAnnotations }}
+      annotations:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      labels:
+        {{- include "read-thing.selectorLabels" . | nindent 8 }}
+    spec:
+      {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+      {{- end }}
+      serviceAccountName: {{ include "read-thing.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      volumes:
+        - name: {{ template "read-thing.fullname" . }}-data
+          persistentVolumeClaim:
+            claimName: data
+      containers:
+        - name: {{ .Chart.Name }}
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag | default .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          envFrom:
+            - configMapRef:
+                name: {{ include "read-thing.fullname" . }}-env
+            - secretRef:
+                name: {{ template "read-thing.fullname" . }}
+          volumeMounts:
+            - name: data
+              mountPath: /opt/thing/shared/data
+          ports:
+            - name: http
+              containerPort: {{ .Values.readthing.port }}
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          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 }}

chart/templates/hpa.yaml

+{{- if .Values.autoscaling.enabled }}
+apiVersion: autoscaling/v2beta1
+kind: HorizontalPodAutoscaler
+metadata:
+  name: {{ include "read-thing.fullname" . }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+spec:
+  scaleTargetRef:
+    apiVersion: apps/v1
+    kind: Deployment
+    name: {{ include "read-thing.fullname" . }}
+  minReplicas: {{ .Values.autoscaling.minReplicas }}
+  maxReplicas: {{ .Values.autoscaling.maxReplicas }}
+  metrics:
+    {{- if .Values.autoscaling.targetCPUUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: cpu
+        targetAverageUtilization: {{ .Values.autoscaling.targetCPUUtilizationPercentage }}
+    {{- end }}
+    {{- if .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    - type: Resource
+      resource:
+        name: memory
+        targetAverageUtilization: {{ .Values.autoscaling.targetMemoryUtilizationPercentage }}
+    {{- end }}
+{{- end }}

chart/templates/ingress.yaml

+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "read-thing.fullname" . -}}
+{{- $svcPort := .Values.service.port -}}
+{{- if semverCompare ">=1.14-0" .Capabilities.KubeVersion.GitVersion -}}
+apiVersion: networking.k8s.io/v1beta1
+{{- else -}}
+apiVersion: extensions/v1beta1
+{{- end }}
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+  {{- with .Values.ingress.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+spec:
+  {{- if .Values.ingress.tls }}
+  tls:
+    {{- range .Values.ingress.tls }}
+    - hosts:
+        {{- range .hosts }}
+        - {{ . | quote }}
+        {{- end }}
+      secretName: {{ .secretName }}
+    {{- end }}
+  {{- end }}
+  rules:
+    {{- range .Values.ingress.hosts }}
+    - host: {{ .host | quote }}
+      http:
+        paths:
+          {{- range .paths }}
+          - path: {{ .path }}
+            backend:
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+          {{- end }}
+    {{- end }}
+  {{- end }}

chart/templates/pvc-data.yaml

+{{- if .Values.readthing.persistence.enabled }}
+apiVersion: v1
+kind: PersistentVolumeClaim
+metadata:
+  name: {{ template "read-thing.fullname" . }}-data
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+spec:
+  accessModes:
+    - {{ .Values.read-thing.persistence.data.accessMode }}
+  resources:
+    {{- toYaml .Values.read-thing.persistence.data.resources | nindent 4}}
+  storageClassName: {{ .Values.read-thing.persistence.data.storageClassName }}
+{{- end }}

chart/templates/secrets.yaml

+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ template "read-thing.fullname" . }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+type: Opaque
+data:
+  OAUTH_CLIENT_KEY: {{ .Values.oauth_client_key | b64enc }}
+  OAUTH_CLIENT_SEC: {{ .Values.oauth_client_sec | b64enc }}

chart/templates/service.yaml

+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "read-thing.fullname" . }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    {{- include "read-thing.selectorLabels" . | nindent 4 }}

chart/templates/serviceaccount.yaml

+{{- if .Values.serviceAccount.create -}}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ include "read-thing.serviceAccountName" . }}
+  labels:
+    {{- include "read-thing.labels" . | nindent 4 }}
+  {{- with .Values.serviceAccount.annotations }}
+  annotations:
+    {{- toYaml . | nindent 4 }}
+  {{- end }}
+{{- end }}

chart/templates/tests/test-connection.yaml

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

chart/values.yaml

+# Default values for read-thing.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 1
+
+image:
+  repository: registry.computer.crimes.consulting/cat/read-thing
+  pullPolicy: Always
+  # Overrides the image tag whose default is the chart appVersion.
+  tag: latest
+
+imagePullSecrets: []
+nameOverride: ""
+fullnameOverride: ""
+
+readthing:
+  callback: https://text.town/auth
+  oauth_client_key: ""
+  oauth_client_sec: ""
+  persistence:
+    enabled: true
+    data:
+      accessMode: ReadWriteOnce
+      resources:
+        requests:
+          storage: 10Gi
+      # if not set explicitly, this should be commented out
+      storageClassName: linode-block-storage-retain
+  port: 3333
+
+ingress:
+  enabled: true
+  annotations:
+    kubernetes.io/ingress.class: nginx
+    cert-manager.io/cluster-issuer: "letsencrypt-prod"
+  hosts:
+    - host: text.town
+      paths:
+        path: '/'
+  tls:
+   - secretName: tt-tls
+     hosts:
+       - text.town
+
+serviceAccount:
+  # Specifies whether a service account should be created
+  create: true
+  # Annotations to add to the service account
+  annotations: {}
+  # The name of the service account to use.
+  # If not set and create is true, a name is generated using the fullname template
+  name: ""
+
+podAnnotations: {}
+
+podSecurityContext: {}
+  # fsGroup: 2000
+
+securityContext: {}
+  # capabilities:
+  #   drop:
+  #   - ALL
+  # readOnlyRootFilesystem: true
+  # runAsNonRoot: true
+  # runAsUser: 1000
+
+service:
+  type: ClusterIP
+  port: 80
+
+resources: {}
+  # We usually recommend not to specify default resources and to leave this as a conscious
+  # choice for the user. This also increases chances charts run on environments with little
+  # resources, such as Minikube. If you do want to specify resources, uncomment the following
+  # lines, adjust them as necessary, and remove the curly braces after 'resources:'.
+  # limits:
+  #   cpu: 100m
+  #   memory: 128Mi
+  # requests:
+  #   cpu: 100m
+  #   memory: 128Mi
+
+autoscaling:
+  enabled: false
+  minReplicas: 1
+  maxReplicas: 100
+  targetCPUUtilizationPercentage: 80
+  # targetMemoryUtilizationPercentage: 80
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}

ci/build.yaml

+.build_script: &build_script |
+  set -x
+  build_image() {
+    destination="--destination $CI_REGISTRY_IMAGE:$CI_COMMIT_SHA"
+    if [ "$CI_COMMIT_BRANCH" = "trunk" ]; then
+      destination="$destination --destination $CI_REGISTRY_IMAGE:latest"
+    fi
+    /kaniko/executor --context "$CI_PROJECT_DIR" --cache=true --dockerfile "$CI_PROJECT_DIR"/docker/Dockerfile $destination
+  }
+
+.build:
+  stage: build
+  image:
+    name: gcr.io/kaniko-project/executor:debug
+    entrypoint: [""]
+  before_script:
+    - *build_script
+    - echo "{\"auths\":{\"$CI_REGISTRY\":{\"username\":\"$CI_REGISTRY_USER\",\"password\":\"$CI_REGISTRY_PASSWORD\"}}}" > /kaniko/.docker/config.json
+
+build-app:
+  extends:
+    - .build
+    - .default-refs
+  script:
+    - build_image

ci/production.yaml

+production:
+  extends:
+    - .deploy
+  stage: production
+  environment:
+    name: read-thing
+    url: https://text.town
+  variables:
+    KUBE_NAMESPACE: read-thing
+    HELM_RELEASE_NAME: read-thing
+    HELM_ARGS: >
+      --set oauth_client_key=$OAUTH_CLIENT_KEY
+      --set oauth_client_sec=$OAUTH_CLIENT_SEC
+  script:
+    - deploy
+  only:
+    refs:
+      - trunk