more lecture apps

Dockerfile

@@ -0,0 +1,9 @@
+# showing a few improper ways to do things
+
+# order of things: package managers before adding code. high changes at bottom
+# too many run commands
+# not cleaning up after pkg installs and tmp files
+# installing multiple services per dockerfile
+
+# example of bad: http://pastebin.com/f6YhKmQ2
+# http://stackoverflow.com/questions/42079122/how-to-install-nvm-in-a-dockerfile#comment71332110_42079122

compose-file-sample/docker-compose.yml

@@ -0,0 +1,13 @@
+version: '3.1'
+
+services:
+  proxy:
+    image: nginx:1.11 # this will use the latest version of 1.11.x
+    ports:
+      - '80:80' # expose 80 on host and sent to 80 in container
+    volumes:
+      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
+  web:
+    image: httpd  # this will use httpd:latest
+    expose:
+      - '80' # on expose port 80 to other containers on it's bridge/overlay network

compose-file-sample/nginx.conf

@@ -0,0 +1,15 @@
+server {
+
+	listen 80;
+
+	location / {
+
+		proxy_pass         http://web;
+		proxy_redirect     off;
+		proxy_set_header   Host $host;
+		proxy_set_header   X-Real-IP $remote_addr;
+		proxy_set_header   X-Forwarded-For $proxy_add_x_forwarded_for;
+		proxy_set_header   X-Forwarded-Host $server_name;
+
+	}
+}

dockerfile-assignment-1/.gitignore

@@ -0,0 +1,30 @@
+# Logs
+logs
+*.log
+
+# Runtime data
+pids
+*.pid
+*.seed
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
+
+# node-waf configuration
+.lock-wscript
+
+# Compiled binary addons (http://nodejs.org/api/addons.html)
+build/Release
+
+# Dependency directory
+# https://docs.npmjs.com/cli/shrinkwrap#caveats
+node_modules
+
+# Debug log from npm
+npm-debug.log

dockerfile-assignment-1/.vscode/launch.json

@@ -0,0 +1,32 @@
+{
+    // Use IntelliSense to learn about possible Node.js debug attributes.
+    // Hover to view descriptions of existing attributes.
+    // For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+    "version": "0.2.0",
+    "configurations": [
+        {
+            "type": "node",
+            "request": "launch",
+            "name": "Launch on Host",
+            "program": "${workspaceRoot}/bin/www",
+            "cwd": "${workspaceRoot}"
+        },
+        {
+            "type": "node2",
+            "request": "attach",
+            "name": "Docker 9229",
+            "port": 9229
+        },
+        {
+            "name": "Docker 5858",
+            "type": "node",
+            "request": "attach",
+            "port": 5858,
+            "address": "localhost",
+            "restart": false,
+            "sourceMaps": false,
+            "localRoot": "${workspaceRoot}",
+            "remoteRoot": "/usr/src/app"
+        }
+    ]
+}

dockerfile-assignment-1/Dockerfile

@@ -0,0 +1,27 @@
+# use this empty Dockerfile to build your assignment
+
+# This dir contains a Node.js app, you need to get it running in a container
+# No modifications to the app should be necessary, only edit this Dockerfile
+
+# Goals of this assignment
+# - you should use the latest 6.x version of the official 'node' image on Docker Hub
+# - this app listens on port 3000, but the container should launch on port 80
+#   so it will respond to http://localhost:80 on your computer
+# - create nnew directory /usr/src/app for app source files with 'RUN mkdir -p /usr/src/app'
+# - then it needs to first copy in package.json file
+# - then it needs to run 'npm install' to install dependencies from that file
+# - to keep it clean and small, run 'npm cache clean' after above
+# - then it needs to copy in the rest of the files
+# - then it needs to start container with command 'node ./bin/www'
+# - in the end you should be using FROM, RUN, WORKDIR, COPY, EXPOSE, and CMD commands
+
+FROM node:6-alpine
+RUN mkdir -p /usr/src/app
+WORKDIR /usr/src/app
+COPY package.json package.json
+RUN npm install && npm cache clean
+COPY . .
+EXPOSE 3000
+CMD [ "node", "./bin/www" ]
+
+# docker build -t bretfisher/dockerfile-assignment-1 . && docker container run --rm -p 80:3000 -p 5858:5858 -p 9229:9229 bretfisher/dockerfile-assignment-1

dockerfile-assignment-1/app.js

@@ -0,0 +1,46 @@
+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 index = require('./routes/index');
+var users = require('./routes/users');
+
+var app = express();
+
+// view engine setup
+app.set('views', path.join(__dirname, 'views'));
+app.set('view engine', 'hbs');
+
+// uncomment after placing your favicon in /public
+//app.use(favicon(path.join(__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('/', index);
+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 handler
+app.use(function(err, req, res, next) {
+  // set locals, only providing error in development
+  res.locals.message = err.message;
+  res.locals.error = req.app.get('env') === 'development' ? err : {};
+
+  // render the error page
+  res.status(err.status || 500);
+  res.render('error');
+});
+
+module.exports = app;

dockerfile-assignment-1/bin/www

@@ -0,0 +1,126 @@
+#!/usr/bin/env node
+
+/**
+ * Module dependencies.
+ */
+
+var app = require('../app');
+var debug = require('debug')('dockerfile-assignment-1:server');
+var http = require('http');
+
+/**
+ * Get port from environment and store in Express.
+ */
+
+var port = normalizePort(process.env.PORT || '3000');
+app.set('port', port);
+
+/**
+ * Create HTTP server.
+ */
+
+var server = http.createServer(app);
+
+/**
+ * Listen on provided port, on all network interfaces.
+ */
+
+server.listen(port);
+server.on('error', onError);
+server.on('listening', onListening);
+
+/**
+ * Normalize a port into a number, string, or false.
+ */
+
+function normalizePort(val) {
+  var port = parseInt(val, 10);
+
+  if (isNaN(port)) {
+    // named pipe
+    return val;
+  }
+
+  if (port >= 0) {
+    // port number
+    return port;
+  }
+
+  return false;
+}
+
+/**
+ * Event listener for HTTP server "error" event.
+ */
+
+function onError(error) {
+  if (error.syscall !== 'listen') {
+    throw error;
+  }
+
+  var bind = typeof port === 'string'
+    ? 'Pipe ' + port
+    : 'Port ' + port;
+
+  // handle specific listen errors with friendly messages
+  switch (error.code) {
+    case 'EACCES':
+      console.error(bind + ' requires elevated privileges');
+      process.exit(1);
+      break;
+    case 'EADDRINUSE':
+      console.error(bind + ' is already in use');
+      process.exit(1);
+      break;
+    default:
+      throw error;
+  }
+}
+
+/**
+ * Event listener for HTTP server "listening" event.
+ */
+
+function onListening() {
+  var addr = server.address();
+  var bind = typeof addr === 'string'
+    ? 'pipe ' + addr
+    : 'port ' + addr.port;
+  debug('Listening on ' + bind);
+}
+
+//
+// need this in docker container to properly exit since node doesn't handle SIGINT/SIGTERM
+// this also won't work on using npm start since:
+// https://github.com/npm/npm/issues/4603
+// https://github.com/npm/npm/pull/10868
+// https://github.com/RisingStack/kubernetes-graceful-shutdown-example/blob/master/src/index.js
+// if you want to use npm then start with `docker run --init` to help, but I still don't think it's
+// a graceful shutdown of node process
+//
+
+// quit on ctrl-c when running docker in terminal
+process.on('SIGINT', function onSigint () {
+	console.info('Got SIGINT (aka ctrl-c in docker). Graceful shutdown ', new Date().toISOString());
+  shutdown();
+});
+
+// quit properly on docker stop
+process.on('SIGTERM', function onSigterm () {
+  console.info('Got SIGTERM (docker container stop). Graceful shutdown ', new Date().toISOString());
+  shutdown();
+})
+
+// shut down server
+function shutdown() {
+  server.close(function onServerClosed (err) {
+    if (err) {
+      console.error(err);
+      process.exitCode = 1;
+		}
+		process.exit();
+  })
+}
+//
+// need above in docker container to properly exit
+//

dockerfile-assignment-1/package.json

@@ -0,0 +1,17 @@
+{
+  "name": "dockerfile-assignment-1",
+  "version": "0.0.0",
+  "private": true,
+  "scripts": {
+    "start": "node ./bin/www"
+  },
+  "dependencies": {
+    "body-parser": "~1.16.0",
+    "cookie-parser": "~1.4.3",
+    "debug": "~2.6.0",
+    "express": "~4.14.1",
+    "hbs": "~4.0.1",
+    "morgan": "~1.7.0",
+    "serve-favicon": "~2.3.2"
+  }
+}

dockerfile-assignment-1/public/stylesheets/style.css

@@ -0,0 +1,8 @@
+body {
+  padding: 50px;
+  font: 14px "Lucida Grande", Helvetica, Arial, sans-serif;
+}
+
+a {
+  color: #00B7FF;
+}

dockerfile-assignment-1/routes/index.js

@@ -0,0 +1,9 @@
+var express = require('express');
+var router = express.Router();
+
+/* GET home page. */
+router.get('/', function(req, res, next) {
+  res.render('index', { title: 'Node.js Express App' });
+});
+
+module.exports = router;

dockerfile-assignment-1/routes/users.js

@@ -0,0 +1,9 @@
+var express = require('express');
+var router = express.Router();
+
+/* GET users listing. */
+router.get('/', function(req, res, next) {
+  res.send('respond with a resource');
+});
+
+module.exports = router;

dockerfile-assignment-1/views/error.hbs

@@ -0,0 +1,3 @@
+<h1>{{message}}</h1>
+<h2>{{error.status}}</h2>
+<pre>{{error.stack}}</pre>

dockerfile-assignment-1/views/index.hbs

@@ -0,0 +1,4 @@
+<h1>{{title}}</h1>
+<p>It Worked!  You Deserve The Captain's Applause</p>
+
+<img src="/images/picard.gif" />

dockerfile-assignment-1/views/layout.hbs

@@ -0,0 +1,10 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>{{title}}</title>
+    <link rel='stylesheet' href='/stylesheets/style.css' />
+  </head>
+  <body>
+    {{{body}}}
+  </body>
+</html>