helm demo chart

helm/demo-chart/.gitignore

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+charts/*

helm/demo-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
+*~
+# Various IDEs
+.project
+.idea/
+*.tmproj

helm/demo-chart/Chart.yaml

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+apiVersion: v1
+appVersion: "1.0"
+description: A Helm chart for Kubernetes
+name: demo-chart
+version: 0.0.1

helm/demo-chart/README.md

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+# Node demo app Chart
+
+## Download dependencies
+```
+helm dependency update
+```
+
+## Install Chart
+```
+helm install .
+```
+
+## Upgrade Chart
+```
+helm upgrade --set image.tag=v0.0.2,mariadb.db.password=$DB_APP_PASS RELEASE .
+```

helm/demo-chart/requirements.lock

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+dependencies:
+- name: mariadb
+  repository: https://kubernetes-charts.storage.googleapis.com/
+  version: 4.3.1
+digest: sha256:e959527904c9c2cc7093cbfbb86a827a05e010c74b795535b7f806a10aefce6c
+generated: 2018-07-31T09:04:27.325312728Z

helm/demo-chart/requirements.yaml

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+dependencies:
+- name: mariadb
+  version: 4.x.x
+  repository: https://kubernetes-charts.storage.googleapis.com/
+  condition: mariadb.enabled
+  tags:
+    - node-app-database

helm/demo-chart/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+{{- range .Values.ingress.hosts }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ . }}{{ $.Values.ingress.path }}
+{{- end }}
+{{- else if contains "NodePort" .Values.service.type }}
+  export NODE_PORT=$(kubectl get --namespace {{ .Release.Namespace }} -o jsonpath="{.spec.ports[0].nodePort}" services {{ template "demo-chart.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace {{ .Release.Namespace }} -o jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.service.type }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "demo-chart.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "demo-chart.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  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={{ template "demo-chart.name" . }},release={{ .Release.Name }}" -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:8080 to use your application"
+  kubectl port-forward $POD_NAME 8080:80
+{{- end }}

helm/demo-chart/templates/_helpers.tpl

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+{{/* vim: set filetype=mustache: */}}
+{{/*
+Expand the name of the chart.
+*/}}
+{{- define "demo-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 "demo-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 "demo-chart.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | 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).
+*/}}
+{{- define "mariadb.fullname" -}}
+{{- printf "%s-%s" .Release.Name "mariadb" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}

helm/demo-chart/templates/deployment.yaml

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+apiVersion: apps/v1beta2
+kind: Deployment
+metadata:
+  name: {{ template "demo-chart.fullname" . }}
+  labels:
+    app: {{ template "demo-chart.name" . }}
+    chart: {{ template "demo-chart.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ template "demo-chart.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "demo-chart.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 3000
+              protocol: TCP
+          env:
+          - name: MYSQL_HOST
+          {{- if .Values.mariadb.enabled }}
+            value: {{ template "mariadb.fullname" . }}
+          {{- else }}
+            value: unknown
+          {{- end }}
+          - name: MYSQL_USER
+          {{- if .Values.mariadb.enabled }}
+            value: {{ .Values.mariadb.db.user | quote }}
+          {{- else }}
+            value: unknown
+          {{- end }}
+          - name: MYSQL_DATABASE
+          {{- if .Values.mariadb.enabled }}
+            value: {{ .Values.mariadb.db.name | quote }}
+          {{- else }}
+            value: unknown
+          {{- end }}
+          - name: MYSQL_PASSWORD
+            valueFrom:
+              secretKeyRef:
+              {{- if .Values.mariadb.enabled }}
+                name: {{ template "mariadb.fullname" . }}
+                key: mariadb-password
+              {{- else }}
+                name: unknown
+                key: db-password
+              {{- end }}
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}

helm/demo-chart/templates/ingress.yaml

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+{{- if .Values.ingress.enabled -}}
+{{- $fullName := include "demo-chart.fullname" . -}}
+{{- $ingressPath := .Values.ingress.path -}}
+apiVersion: extensions/v1beta1
+kind: Ingress
+metadata:
+  name: {{ $fullName }}
+  labels:
+    app: {{ template "demo-chart.name" . }}
+    chart: {{ template "demo-chart.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+{{- with .Values.ingress.annotations }}
+  annotations:
+{{ toYaml . | indent 4 }}
+{{- end }}
+spec:
+{{- if .Values.ingress.tls }}
+  tls:
+  {{- range .Values.ingress.tls }}
+    - hosts:
+      {{- range .hosts }}
+        - {{ . }}
+      {{- end }}
+      secretName: {{ .secretName }}
+  {{- end }}
+{{- end }}
+  rules:
+  {{- range .Values.ingress.hosts }}
+    - host: {{ . }}
+      http:
+        paths:
+          - path: {{ $ingressPath }}
+            backend:
+              serviceName: {{ $fullName }}
+              servicePort: http
+  {{- end }}
+{{- end }}

helm/demo-chart/templates/service.yaml

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+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ template "demo-chart.fullname" . }}
+  labels:
+    app: {{ template "demo-chart.name" . }}
+    chart: {{ template "demo-chart.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  type: {{ .Values.service.type }}
+  ports:
+    - port: {{ .Values.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app: {{ template "demo-chart.name" . }}
+    release: {{ .Release.Name }}

helm/demo-chart/values.yaml

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+# Default values for demo-chart.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+
+replicaCount: 3
+
+image:
+  repository: wardviaene/node-demo-app
+  tag: v0.0.1
+  pullPolicy: IfNotPresent
+
+service:
+  type: LoadBalancer
+  port: 80
+
+ingress:
+  enabled: false
+  annotations: {}
+    # kubernetes.io/ingress.class: nginx
+    # kubernetes.io/tls-acme: "true"
+  path: /
+  hosts:
+    - node-demo-app.newtech.academy
+  tls: []
+  #  - secretName: chart-example-tls
+  #    hosts:
+  #      - chart-example.local
+
+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
+
+nodeSelector: {}
+
+tolerations: []
+
+affinity: {}
+
+##
+## MariaDB chart configuration
+##
+mariadb:
+  enabled: true
+  replication:
+    enabled: false
+  db:
+    name: app
+    user: app-user
+  master:
+    persistence:
+      enabled: true
+      accessMode: ReadWriteOnce
+      size: 8Gi
+