feat(cd): add Helm Chart with automated releases

charts/listory/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 }}://{{ $host.host }}{{ . }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ include "listory.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get --namespace {{ .Release.Namespace }} svc -w {{ include "listory.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ include "listory.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 "listory.name" . }},app.kubernetes.io/instance={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} port-forward $POD_NAME 8080:80
+{{- end }}

charts/listory/templates/_helpers.tpl

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

charts/listory/templates/deployment.yaml

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+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "listory.fullname" . }}
+  labels:
+    {{- include "listory.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      {{- include "listory.selectorLabels" . | nindent 6 }}
+  template:
+    metadata:
+      labels:
+        {{- include "listory.selectorLabels" . | nindent 8 }}
+    spec:
+    {{- with .Values.imagePullSecrets }}
+      imagePullSecrets:
+        {{- toYaml . | nindent 8 }}
+    {{- end }}
+      serviceAccountName: {{ include "listory.serviceAccountName" . }}
+      securityContext:
+        {{- toYaml .Values.podSecurityContext | nindent 8 }}
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Chart.AppVersion }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          env:
+            - name: DB_HOST
+              value: {{ .Values.externalDatabase.host }}
+            - name: DB_USERNAME
+              value: {{ .Values.externalDatabase.user }}
+            - name: DB_PASSWORD
+              valueFrom:  
+                secretKeyRef:
+                  name: {{ include "listory.fullname" . }}-external-db
+                  key: postgres-password
+            - name: DB_DATABASE
+              value: {{ .Values.externalDatabase.database }}
+            - name: JWT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "listory.fullname" . }}
+                  key: jwt-secret
+            - name: APP_URL
+              value: https://{{ .Values.ingress.host }}
+            - name: SPOTIFY_CLIENT_ID
+              value: {{ .Values.spotify.clientId }}
+            - name: SPOTIFY_CLIENT_SECRET
+              valueFrom:
+                secretKeyRef:
+                  name: {{ include "listory.fullname" . }}
+                  key: spotify-client-secret
+            - name: SPOTIFY_USER_FILTER
+              value: {{ .Values.spotify.userFilter }}
+
+          securityContext:
+            {{- toYaml .Values.securityContext | nindent 12 }}
+          ports:
+            - name: http
+              containerPort: 3000
+              protocol: TCP
+          readinessProbe:
+            httpGet:
+              path: /api/v1/health
+              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 }}

charts/listory/templates/ingress.yaml

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+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "listory.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 "listory.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:
+    - host: {{ .Values.ingress.host | quote }}
+      http:
+        paths:
+          - path: /
+            backend:
+              serviceName: {{ $fullName }}
+              servicePort: {{ $svcPort }}
+{{- end }}

charts/listory/templates/secrets-external-db.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "listory.fullname" . }}-external-db
+  labels:
+    {{- include "listory.labels" . | nindent 4 }}
+type: Opaque
+data:
+  {{- if .Values.externalDatabase.password }}
+  postgres-password: {{ .Values.externalDatabase.password | b64enc | quote }}
+  {{- end }}

charts/listory/templates/secrets.yaml

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+apiVersion: v1
+kind: Secret
+metadata:
+  name: {{ include "listory.fullname" . }}
+  labels:
+    {{- include "listory.labels" . | nindent 4 }}
+type: Opaque
+data:
+  spotify-client-secret: {{ .Values.spotify.clientSecret | b64enc | quote }}
+  jwt-secret: {{ .Values.auth.jwtSecret | b64enc | quote }}

charts/listory/templates/service.yaml

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

charts/listory/templates/serviceaccount.yaml

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