Adding nodejs kubernetes flow-> Default and With DB (#265)

* Add php support, update tweet links on python

* Adding kubernetes flow for GitHub

* Add kubernetes with db flow

* Add plain node kubernetes flow

* Add new control for api version

* Add fix for api version in node plain kube

Author: suyash691

github/node/express/kubernetes/Application/.draftignore

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+*.swp
+*.tmp
+*.temp
+.git*

github/node/express/kubernetes/Application/Dockerfile

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+FROM node:8
+LABEL maintainer="Azure App Services Container Images <[email protected]>"
+
+ENV PORT 8080
+EXPOSE 8080
+
+# Create app directory
+WORKDIR /app
+COPY package.json .
+
+# Install app dependencies
+RUN npm install
+
+# Bundle app source
+COPY . .
+
+CMD ["npm", "start"]

github/node/express/kubernetes/Application/LICENSE

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+    MIT License
+
+    Copyright (c) Microsoft Corporation. All rights reserved.
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in all
+    copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+    SOFTWARE

github/node/express/kubernetes/Application/README.md

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+| Language | Framework | Platform | Author |
+| -------- | -------- |--------|--------|
+| Nodejs | Express | Azure Web App, Virtual Machine| |
+
+
+# Nodejs Express web application
+
+Sample Nodejs Express web application built using Visual Studio 2017.
+
+## License:
+
+See [LICENSE](LICENSE).
+
+## Contributing
+
+This project has adopted the [Microsoft Open Source Code of Conduct](https://opensource.microsoft.com/codeofconduct/). For more information see the [Code of Conduct FAQ](https://opensource.microsoft.com/codeofconduct/faq/) or contact [[email protected]](mailto:[email protected]) with any additional questions or comments.
+

github/node/express/kubernetes/Application/app.js

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+'use strict';
+var debug = require('debug');
+var express = require('express');
+var path = require('path');
+var favicon = require('serve-favicon');
+var logger = require('morgan');
+var cookieParser = require('cookie-parser');
+var bodyParser = require('body-parser');
+var routes = require('./routes/index');
+var users = require('./routes/users');
+var redis = require('ioredis');
+var redisServer = process.env.redis_server || 'redis-cache';
+
+var appInsights = require('applicationinsights');
+appInsights.setup();
+appInsights.start();
+
+var app = express();
+var client = redis.createClient(6379, redisServer);
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'pug');
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(__dirname + '/public/favicon.ico'));
+app.use(logger('dev'));
+app.use(bodyParser.json());
+app.use(bodyParser.urlencoded({ extended: false }));
+app.use(cookieParser());
+app.use(express.static(path.join(__dirname, 'public')));
+
+app.use('/', routes);
+app.use('/users', users);
+
+// catch 404 and forward to error handler
+app.use(function (req, res, next) {
+    var err = new Error('Not Found');
+    err.status = 404;
+    next(err);
+});
+
+// error handlers
+// development error handler
+// will print stacktrace
+if (app.get('env') === 'development') {
+    app.use(function (err, req, res, next) {
+        res.status(err.status || 500);
+        res.render('error', {
+            message: err.message,
+            error: err
+        });
+    });
+}
+
+// production error handler
+// no stacktraces leaked to user
+app.use(function (err, req, res, next) {
+    res.status(err.status || 500);
+    res.render('error', {
+        message: err.message,
+        error: {}
+    });
+});
+
+app.set('port', process.env.PORT || 8080);
+
+var server = app.listen(app.get('port'), function () {
+    client.exists('viewCount',function(err,reply) {
+        if(!err) {
+            if(reply === 1) {
+                debug("Key exists");
+            } else {
+                client.set('viewCount', 0)
+            }
+        }
+    });
+    debug('Express server listening on port ' + server.address().port);
+});

github/node/express/kubernetes/Application/charts/sampleapp/.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

github/node/express/kubernetes/Application/charts/sampleapp/Chart.yaml

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+apiVersion: v1
+description: A Helm chart for Kubernetes
+name: sampleapp
+version: v0.2.0

github/node/express/kubernetes/Application/charts/sampleapp/templates/NOTES.txt

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+1. Get the application URL by running these commands:
+{{- if .Values.ingress.enabled }}
+  http{{ if $.Values.ingress.tls }}s{{ end }}://{{ $.Values.ingress.hostname }}{{ $.Values.ingress.path }}
+{{- else }}
+     NOTE: It may take a few minutes for the LoadBalancer IP to be available.
+           You can watch the status of by running 'kubectl get svc -w {{ template "sampleapp.fullname" . }}'
+  export SERVICE_IP=$(kubectl get svc --namespace {{ .Release.Namespace }} {{ template "sampleapp.fullname" . }} -o jsonpath='{.status.loadBalancer.ingress[0].ip}')
+  echo http://$SERVICE_IP:{{ .Values.service.port }}
+{{- end }}

github/node/express/kubernetes/Application/charts/sampleapp/templates/_helpers.tpl

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

github/node/express/kubernetes/Application/charts/sampleapp/templates/deployment.yaml

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+apiVersion: {{ .Values.apiVersion }}
+kind: Deployment
+metadata:
+  name: {{ template "sampleapp.fullname" . }}
+  labels:
+    app: {{ template "sampleapp.name" . }}
+    chart: {{ template "sampleapp.chart" . }}
+    release: {{ .Release.Name }}
+    heritage: {{ .Release.Service }}
+spec:
+  replicas: {{ .Values.replicaCount }}
+  selector:
+    matchLabels:
+      app: {{ template "sampleapp.name" . }}
+      release: {{ .Release.Name }}
+  template:
+    metadata:
+      labels:
+        app: {{ template "sampleapp.name" . }}
+        release: {{ .Release.Name }}
+    spec:
+      containers:
+        - name: {{ .Chart.Name }}
+          image: "{{ .Values.image.repository }}:{{ .Values.image.tag }}"
+          imagePullPolicy: {{ .Values.image.pullPolicy }}
+          ports:
+            - name: http
+              containerPort: {{ .Values.service.port }}
+              protocol: TCP
+          livenessProbe:
+            httpGet:
+              path: /
+              port: http
+            initialDelaySeconds: 30
+          readinessProbe:
+            httpGet:
+              path: /
+              port: http
+            initialDelaySeconds: 30
+          env:
+            - name: APPINSIGHTS_INSTRUMENTATIONKEY
+              value: {{ .Values.applicationInsights.InstrumentationKey }}
+            {{- $root := . }}
+            {{- range $ref, $values := .Values.secrets }}
+            {{- range $key, $value := $values }}
+            - name: {{ $ref | upper }}_{{ $key | upper }}
+              valueFrom:
+                secretKeyRef:
+                  name: {{ template "sampleapp.fullname" $root }}-{{ $ref }}
+                  key: {{ $key }}
+            {{- end }}
+            {{- end }}
+          resources:
+{{ toYaml .Values.resources | indent 12 }}
+    {{- if .Values.imagePullSecrets }}
+      imagePullSecrets:
+      {{- range .Values.imagePullSecrets }}
+        - name: {{ . }}
+      {{- end}}
+    {{- end }}
+    {{- with .Values.nodeSelector }}
+      nodeSelector:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.affinity }}
+      affinity:
+{{ toYaml . | indent 8 }}
+    {{- end }}
+    {{- with .Values.tolerations }}
+      tolerations:
+{{ toYaml . | indent 8 }}
+    {{- end }}