add sample-demo

sample-demo/Chart.yaml

+apiVersion: v2
+name: simpleapp
+description: A very simple helloworld application
+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.
+version: 1.0.0
+# This is the version number of the application being deployed. 
+# This version number should be
+# incremented each time you make changes to the application.
+appVersion: 1.0.0
\ No newline at end of file

sample-demo/NOTES.txt

+{{- if .Values.frontend.enabled }}
+  Get the Frontend application URL by running these commands:
+{{- if .Values.frontend.ingress.enabled }}
+{{- range $host := .Values.frontend.ingress.hosts }}
+  {{- range .paths }}
+  http{{ if $.Values.frontend.ingress.tls }}s{{ end }}://
+  {{ $host.host }}{{ . }}
+  {{- end }}
+{{- end }}
+{{- else if contains "NodePort" .Values.frontend.service.type }}
+  export NODE_PORT=$(kubectl get 
+  --namespace {{ .Release.Namespace }} -o jsonpath="  
+  {.spec.ports[0].nodePort}" services 
+  {{ include "simplefrontend-service.fullname" . }})
+  export NODE_IP=$(kubectl get nodes --namespace 
+  {{ .Release.Namespace }} -o 
+  jsonpath="{.items[0].status.addresses[0].address}")
+  echo http://$NODE_IP:$NODE_PORT
+{{- else if contains "LoadBalancer" .Values.frontend.service.type }}
+  NOTE: It may take a few minutes for the LoadBalancer IP to be  
+  available.
+  You can watch the status of by running 
+  'kubectl get --namespace {{ .Release.Namespace }} svc -w 
+  {{ include "simplefrontend-service.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace 
+  {{ .Release.Namespace }} 
+  {{ include "simplefrontend-service.fullname" . }} 
+  --template "{{"{{ range (index .status.loadBalancer.ingress 0) }}
+  {{.}}{{ end }}"}}")
+  
+  echo http://$SERVICE_IP:{{ .Values.frontend.service.port }}
+{{- else if contains "ClusterIP" .Values.frontend.service.type }}
+  export POD_NAME=$(kubectl get pods --namespace 
+  {{ .Release.Namespace }} -l 
+  app={{ include "simplefrontend.fullname" . }} 
+  -o jsonpath="{.items[0].metadata.name}")
+  echo "Visit http://127.0.0.1:80 to use your application"
+  kubectl --namespace {{ .Release.Namespace }} 
+  port-forward $POD_NAME 80:80
+{{- end }}
+{{- end }}
+{{- if .Values.backend.enabled }}
+  Get the application Backend URL by running these commands:
+  export POD_NAME=$(kubectl get pods --namespace 
+  {{ .Release.Namespace }} 
+  -l app={{ include "simplebackend.fullname" . }} 
+  -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 80:8080
+{{- end }}
\ No newline at end of file

sample-demo/templates/_helpers.tpl

+{{/* vim: set filetype=mustache: */}}
+{{/* Expand the name of the chart. */}}
+{{/* 
+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 "simpleapp.name" -}}
+{{- default .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simpleapp.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 -}}
+{{- define "simplebackend.fullname" -}}
+{{- printf "%s-%s-backend" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simplefrontend.fullname" -}}
+{{- printf "%s-%s-frontend" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simplebackend-deployment.fullname" -}}
+{{- printf "%s-%s-backend-dpl" .Release.Name .Chart.Name|       trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simplebackend-service.url" -}}
+{{- if .Values.frontend.env.backend -}}
+{{- .Values.frontend.env.backend | trunc 63 | trimSuffix "-" -}}
+{{- else -}}
+{{- printf "http://%s-%s-backend-svc:8080" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- end -}}
+{{- define "simplefrontend-deployment.fullname" -}}
+{{- printf "%s-%s-frontend-dpl" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simplebackend-service.fullname" -}}
+{{- printf "%s-%s-backend-svc" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{- define "simplefrontend-service.fullname" -}}
+{{- printf "%s-%s-frontend-svc" .Release.Name .Chart.Name | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{/* Create chart name and version as used by the chart label. */}}
+{{- define "simpleapp.chart" -}}
+{{- printf "%s-%s" .Chart.Name .Chart.Version | replace "+" "_" | trunc 63 | trimSuffix "-" -}}
+{{- end -}}
+{{/* Common labels */}}
+{{- define "simpleapp.labels" -}}
+helm.sh/chart: {{ include "simpleapp.chart" . }}
+{{ include "simpleapp.selectorLabels" . }}
+{{- if .Chart.AppVersion }}
+app.kubernetes.io/version: {{ .Chart.AppVersion | quote }}
+{{- end }}
+app.kubernetes.io/managed-by: {{ .Release.Service }}
+{{- end -}}
+{{/* Selector labels */}}
+{{- define "simpleapp.selectorLabels" -}}
+app.kubernetes.io/name: {{ include "simpleapp.name" . }}
+app.kubernetes.io/instance: {{ .Release.Name }}
+{{- end -}}
+{{/* Create the name of the service account to use */}}
+{{- define "simpleapp.serviceAccountName" -}}
+{{- if .Values.serviceAccount.create -}}
+    {{ default (include "simpleapp.fullname" .) .Values.serviceAccount.name }}
+{{- else -}}
+{{ default "default" .Values.serviceAccount.name }}
+{{- end -}}
+{{- end -}}
\ No newline at end of file

sample-demo/templates/deployment.yaml

+{{- if .Values.backend.enabled -}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "simplebackend-deployment.fullname" . }}
+  labels:
+    app.kubernetes.io/stack: 
+      {{ include "simplebackend.fullname" . }}
+    {{- include "simpleapp.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.backend.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ include "simplebackend.fullname" . }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "simplebackend.fullname" . }}
+    spec:
+      containers:
+        - name: {{ include "simplebackend.fullname" . }}
+          image: "{{ .Values.backend.image.repository }}:{{ .Values.backend.image.tag | default "latest" }}"
+          imagePullPolicy: {{ .Values.backend.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: 8080
+              protocol: TCP
+          resources:
+            {{- toYaml .Values.backend.resources | nindent 12 }}
+{{- end }}
+---
+{{- if .Values.frontend.enabled -}}
+apiVersion: apps/v1
+kind: Deployment
+metadata:
+  name: {{ include "simplefrontend-deployment.fullname" . }}
+  labels:
+    app.kubernetes.io/stack: 
+      {{ include "simplefrontend.fullname" . }}
+    {{- include "simpleapp.labels" . | nindent 4 }}
+spec:
+  replicas: {{ .Values.frontend.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ include "simplefrontend.fullname" . }}
+  template:
+    metadata:
+      labels:
+        app: {{ include "simplefrontend.fullname" . }}
+    spec:
+      containers:
+        - name: {{ include "simplefrontend.fullname" . }}
+          image: 
+            "{{ .Values.frontend.image.repository }}:{{ .Values.frontend.image.tag | default "latest" }}"
+          imagePullPolicy: {{ .Values.frontend.image.pullPolicy }}
+          env:
+            - name: BACKEND_URL
+              value:  {{ include "simplebackend-service.url" .}}
+          ports:
+            - name: http
+              containerPort: 
+                {{ .Values.frontend.image.ports.containerPort }}
+              protocol: TCP
+          resources:
+            {{- toYaml .Values.frontend.resources | nindent 12 }}
+{{- end }}
\ No newline at end of file

sample-demo/templates/service.yaml

+{{- if .Values.backend.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "simplebackend-service.fullname" . }}
+  labels:
+    app.kubernetes.io/stack: 
+      {{ include "simplebackend.fullname" . }}
+    {{- include "simpleapp.labels" . | nindent 4 }}
+spec:
+  type: ClusterIP
+  ports:
+    - port: 8080
+      targetPort: http
+      protocol: TCP 
+      name: http
+  selector:
+    app: {{ include "simplebackend.fullname" . }}
+{{- end }}
+---
+{{- if .Values.frontend.enabled -}}
+apiVersion: v1
+kind: Service
+metadata:
+  name: {{ include "simplefrontend-service.fullname" . }}
+  labels:
+    app.kubernetes.io/stack: 
+      {{ include "simplefrontend.fullname" . }}
+    {{- include "simpleapp.labels" . | nindent 4 }}
+spec:
+  type: {{ .Values.frontend.service.type }}
+  ports:
+    - port: {{ .Values.frontend.service.port }}
+      targetPort: http
+      protocol: TCP
+      name: http
+  selector:
+    app: {{ include "simplefrontend.fullname" . }}
+{{- end }}

sample-demo/values.yaml

+# Default values for simpleapp.
+# This is a YAML-formatted file.
+# Declare variables to be passed into your templates.
+fullnameOverride: ""
+nameOverride: ""
+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:
+frontend:
+  enabled: true
+  replicaCount: 1
+  image:
+    repository: eu.gcr.io/sandbox-training-225413/simplefrontend
+    pullPolicy: Always
+    ports:
+      containerPort: 80
+  env:
+    backend: ""
+  service:
+    type: NodePort
+    port: 80
+  ingress:
+    enabled: false
+    annotations:
+      kubernetes.io/ingress.class: nginx
+    hosts:
+      - host: chart-example.local
+        paths:
+          - /
+    tls: []
+    #  - secretName: chart-example-tls
+    #    hosts:
+    #      - chart-example.local
+  resources: {}
+backend:
+  enabled: true
+  replicaCount: 1
+  image:
+    repository: lmnzr/simplebackend
+    pullPolicy: Always
+  resources: {}
\ No newline at end of file