setupping docker file assignment 1

Author: codershona

docker-2.md

@@ -145,7 +145,7 @@ docker image build -t customnginx .
 
 docker image ls
 
-vim Dockerfi le
+vim Dockerfile
 Or,
 nano Dockerfile
 
@@ -156,27 +156,61 @@ docker image build -t customnginx .
 ```
 cd dockerfile-sample-2
 
+Run: ll (LL small letter)
+
 vim Dockerfile
 
 docker container run -p 80:80 --rm nginx
+Or,
+docker container run -p 8080:80 --rm nginx
 
 docker image build -t nginx-with-html .
 
 docker container run -p 80:80 --rm nginx-with-html
+Or,
+docker container run -p 8080:80 --rm nginx-with-html
+
+If you run 8080:80 prt then go to http://localhost:8080/ because only localhost will not work and we will not see our inde html file updates.
 
 docker image ls
 
 docker image tag --help
 
-docker image tag nginx-with-html:latest bretfisher/nginx-with-html:latest
+docker image tag nginx-with-html:latest codersh/nginx-with-html:latest
 
 docker image ls
 
 docker push
 ```
+
+
+* Which of the following is an example of a container image that you can run?
+
+  Answer: nginx
+
+* Which flag would you pass to specify a docker build referencing a file other than the default 'Dockerfile'?
+
+ANSWER: -f
+
+ * Which Dockerfile stanza (Command) is best to use for changing the directory in a Dockerfile?
+
+ ANSWER: WORKDIR
+
+
 ## Build Your Own Dockerfile and Run Containers :
 
  * Building our own image is quite fun part of the container images.
+ * Docker file are part process workflow and part art.
+ * Take exisiting Node.js app and dockerize it.
+ * Make Dockerfile, build it, test it, push it, (rm it), Run it.
+ * Expect this to be iterative, rarely do I get it right the first time. 
+ * Details in dockerfile-assignment-1.Dockerfile.
+ * Use the Alphine version of the official 'node' 6.x image.
+ * Expected result is web site at http://localhost or, http://localhost:8080
+ * Tag and Push to your docker hub account.
+ * Remove the image from local cache, run again from hub.
+
+
 ```
 cd dockerfile-assignment-1
 

dockerfile-assignment-1/.dockerignore

@@ -0,0 +1,11 @@
+# add git-ignore syntax here of things you don't want copied into docker image
+
+# for all code you usually don't want .git history in image, just the current commit you have checked out
+.git
+
+# you usually don't want dockerfile and compose files in the image either
+*Dockerfile*
+*docker-compose*
+
+# for Node.js apps, you want to build the node_modules in the image, and not copy from host
+node_modules

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 +1,40 @@
+# 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
+
+# Overview of this assignment
+# use the instructions from developer below to create a working Dockerfile
+# feel free to add command inline below or use a new file, up to you (but must be named Dockerfile)
+# once Dockerfile builds correctly, start container locally to make sure it works on http://localhost
+# then ensure image is named properly for your Docker Hub account with a new repo name
+# push to Docker Hub, then go to https://hub.docker.com and verify
+# then remove local image from cache
+# then start a new container from your Hub image, and watch how it auto downloads and runs
+# test again that it works at http://localhost
+
+
+# Instructions from the app developer
+# - you should use the 'node' official image, with the alpine 6.x branch (node:6-alpine)
+  #  yes this is a 2-year old image of node, but all official images are always
+  #  available on Docker Hub forever, to ensure even old apps still work.
+  #  It is common to still need to deploy old app versions, even years later.
+# - 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
+# - then it should use alpine package manager to install tini: 'apk add --update tini'
+# - then it should create directory /usr/src/app for app files with 'mkdir -p /usr/src/app'
+# - Node uses a "package manager", so it needs to 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 --force' after above
+# - then it needs to copy in all files from current directory
+# - then it needs to start container with command '/sbin/tini -- node ./bin/www'
+# - in the end you should be using FROM, RUN, WORKDIR, COPY, EXPOSE, and CMD commands
+
+# Bonus Extra Credit
+# this will not have you setting up a complete image useful for local development, test, and prod
+# it's just meant to get you started with basic Dockerfile concepts and not focus too much on
+# proper Node.js use in a container. **If you happen to be a Node.js Developer**, then 
+# after you get through more of this course, you should come back and use my 
+# Node Docker Good Defaults sample project on GitHub to change this Dockerfile for 
+# better local development with more advanced topics
+# https://github.com/BretFisher/node-docker-good-defaults

dockerfile-assignment-1/answer/Dockerfile

@@ -0,0 +1,15 @@
+FROM node:6-alpine
+
+EXPOSE 3000
+
+RUN apk add --update tini
+
+WORKDIR /usr/src/app
+
+COPY package.json package.json
+
+RUN npm install && npm cache clean --force
+
+COPY . .
+
+CMD [ "/sbin/tini", "--", "node", "./bin/www" ]

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 +1,91 @@
+#!/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);
+}
+

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": "^1.18.3",
+    "cookie-parser": "~1.4.3",
+    "debug": "~2.6.0",
+    "express": "^4.16.4",
+    "hbs": "~4.0.1",
+    "morgan": "^1.9.1",
+    "serve-favicon": "^2.5.0"
+  }
+}

dockerfile-assignment-1/public/images/picard.gif

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

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

@@ -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/index.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/routes/users.js

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