├── .gitignore ├── LICENSE ├── Makefile ├── README.md ├── docker-compose.build.yml ├── docker-compose.yml ├── entrypoint ├── Dockerfile └── main.go ├── record-vote-task ├── Dockerfile ├── pom.xml └── src │ └── main │ └── java │ └── worker │ └── Worker.java ├── result ├── Dockerfile ├── app.pl └── public │ ├── app.js │ └── index.html └── vote ├── Dockerfile ├── app.py ├── requirements.txt └── templates └── index.html /.gitignore: -------------------------------------------------------------------------------- 1 | *.pyc 2 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | 2 | Apache License 3 | Version 2.0, January 2004 4 | http://www.apache.org/licenses/ 5 | 6 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 7 | 8 | 1. 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Read more in the [Serverless Docker repository](https://github.com/bfirsh/serverless-docker). 4 | 5 | ## Architecture 6 | 7 | It consists of a simple entrypoint server that listens for HTTP requests. All of the other functionality of the app is run on-demand as Docker containers for each HTTP request: 8 | 9 | - **vote**: The voting web app, as a CGI container that serves a single HTTP request. 10 | - **record-vote-task**: A container which processes a vote in the background, run by the vote app. 11 | - **result**: The result web app, as a CGI container. 12 | 13 | ## Running 14 | 15 | Run in this directory: 16 | 17 | $ make 18 | 19 | The app will be running at http://localhost/vote/ and http://localhost/result/ 20 | -------------------------------------------------------------------------------- /docker-compose.build.yml: -------------------------------------------------------------------------------- 1 | version: "2" 2 | 3 | services: 4 | vote: 5 | build: ./vote 6 | image: bfirsh/serverless-vote 7 | 8 | result: 9 | build: ./result 10 | image: bfirsh/serverless-result 11 | 12 | record-vote-task: 13 | build: ./record-vote-task 14 | image: bfirsh/serverless-record-vote-task 15 | -------------------------------------------------------------------------------- /docker-compose.yml: -------------------------------------------------------------------------------- 1 | version: "2" 2 | 3 | services: 4 | entrypoint: 5 | build: entrypoint 6 | ports: 7 | - 80:80 8 | volumes: 9 | - "/var/run/docker.sock:/var/run/docker.sock" 10 | 11 | db: 12 | image: postgres:9.4 13 | -------------------------------------------------------------------------------- /entrypoint/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM golang:1.7-onbuild 2 | -------------------------------------------------------------------------------- /entrypoint/main.go: -------------------------------------------------------------------------------- 1 | package main 2 | 3 | import ( 4 | "net/http" 5 | 6 | "github.com/bfirsh/go-dcgi" 7 | "github.com/docker/engine-api/client" 8 | "github.com/docker/engine-api/types/container" 9 | ) 10 | 11 | func main() { 12 | cli, err := client.NewClient("unix:///var/run/docker.sock", "v1.23", nil, nil) 13 | if err != nil { 14 | panic(err) 15 | } 16 | 17 | hostConfig := &container.HostConfig{ 18 | NetworkMode: "serverlessdockervotingapp_default", 19 | Binds: []string{"/var/run/docker.sock:/var/run/docker.sock"}, 20 | } 21 | 22 | http.Handle("/vote/", &dcgi.Handler{ 23 | Image: "bfirsh/serverless-vote", 24 | Client: cli, 25 | HostConfig: hostConfig, 26 | Root: "/vote", // strip /vote from all URLs 27 | }) 28 | http.Handle("/result/", &dcgi.Handler{ 29 | Image: "bfirsh/serverless-result", 30 | Client: cli, 31 | HostConfig: hostConfig, 32 | Root: "/result", 33 | }) 34 | http.ListenAndServe(":80", nil) 35 | } 36 | -------------------------------------------------------------------------------- /record-vote-task/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM java:openjdk-8-jdk-alpine 2 | 3 | RUN MAVEN_VERSION=3.3.3 \ 4 | && cd /usr/share \ 5 | && wget http://archive.apache.org/dist/maven/maven-3/$MAVEN_VERSION/binaries/apache-maven-$MAVEN_VERSION-bin.tar.gz -O - | tar xzf - \ 6 | && mv /usr/share/apache-maven-$MAVEN_VERSION /usr/share/maven \ 7 | && ln -s /usr/share/maven/bin/mvn /usr/bin/mvn 8 | 9 | WORKDIR /code 10 | 11 | ADD pom.xml /code/pom.xml 12 | RUN ["mvn", "dependency:resolve"] 13 | RUN ["mvn", "verify"] 14 | 15 | # Adding source, compile and package into a fat jar 16 | ADD src /code/src 17 | RUN ["mvn", "package"] 18 | 19 | ENTRYPOINT ["java", "-jar", "target/worker-jar-with-dependencies.jar"] 20 | -------------------------------------------------------------------------------- /record-vote-task/pom.xml: -------------------------------------------------------------------------------- 1 | 2 | 4 | 4.0.0 5 | 6 | worker 7 | worker 8 | 1.0-SNAPSHOT 9 | 10 | 11 | 12 | 13 | org.json 14 | json 15 | 20140107 16 | 17 | 18 | 19 | org.postgresql 20 | postgresql 21 | 9.4-1200-jdbc41 22 | 23 | 24 | 25 | 26 | 27 | 28 | org.apache.maven.plugins 29 | maven-jar-plugin 30 | 2.4 31 | 32 | worker 33 | 34 | 35 | true 36 | worker.Worker 37 | dependency-jars/ 38 | 39 | 40 | 41 | 42 | 43 | org.apache.maven.plugins 44 | maven-compiler-plugin 45 | 3.1 46 | 47 | 1.7 48 | 1.7 49 | 50 | 51 | 52 | org.apache.maven.plugins 53 | maven-assembly-plugin 54 | 55 | 56 | 57 | attached 58 | 59 | package 60 | 61 | worker 62 | 63 | jar-with-dependencies 64 | 65 | 66 | 67 | worker.Worker 68 | 69 | 70 | 71 | 72 | 73 | 74 | 75 | 76 | 77 | -------------------------------------------------------------------------------- /record-vote-task/src/main/java/worker/Worker.java: -------------------------------------------------------------------------------- 1 | package worker; 2 | 3 | import java.sql.*; 4 | 5 | class Worker { 6 | public static void main(String[] args) { 7 | try { 8 | Connection dbConn = connectToDB("db"); 9 | 10 | String voterID = args[0]; 11 | String vote = args[1]; 12 | 13 | System.err.printf("Processing vote for '%s' by '%s'\n", vote, voterID); 14 | updateVote(dbConn, voterID, vote); 15 | } catch (SQLException e) { 16 | e.printStackTrace(); 17 | System.exit(1); 18 | } 19 | } 20 | 21 | static void updateVote(Connection dbConn, String voterID, String vote) throws SQLException { 22 | PreparedStatement insert = dbConn.prepareStatement( 23 | "INSERT INTO votes (id, vote) VALUES (?, ?)"); 24 | insert.setString(1, voterID); 25 | insert.setString(2, vote); 26 | 27 | try { 28 | insert.executeUpdate(); 29 | } catch (SQLException e) { 30 | PreparedStatement update = dbConn.prepareStatement( 31 | "UPDATE votes SET vote = ? WHERE id = ?"); 32 | update.setString(1, vote); 33 | update.setString(2, voterID); 34 | update.executeUpdate(); 35 | } 36 | } 37 | 38 | static Connection connectToDB(String host) throws SQLException { 39 | Connection conn = null; 40 | 41 | try { 42 | 43 | Class.forName("org.postgresql.Driver"); 44 | String url = "jdbc:postgresql://" + host + "/postgres"; 45 | 46 | while (conn == null) { 47 | try { 48 | conn = DriverManager.getConnection(url, "postgres", ""); 49 | } catch (SQLException e) { 50 | System.err.println("Failed to connect to db - retrying"); 51 | sleep(1000); 52 | } 53 | } 54 | 55 | PreparedStatement st = conn.prepareStatement( 56 | "CREATE TABLE IF NOT EXISTS votes (id VARCHAR(255) NOT NULL UNIQUE, vote VARCHAR(255) NOT NULL)"); 57 | st.executeUpdate(); 58 | 59 | } catch (ClassNotFoundException e) { 60 | e.printStackTrace(); 61 | System.exit(1); 62 | } 63 | 64 | return conn; 65 | } 66 | 67 | static void sleep(long duration) { 68 | try { 69 | Thread.sleep(duration); 70 | } catch (InterruptedException e) { 71 | System.exit(1); 72 | } 73 | } 74 | } 75 | -------------------------------------------------------------------------------- /result/Dockerfile: -------------------------------------------------------------------------------- 1 | FROM perl:5 2 | RUN curl -L https://cpanmin.us | perl - -M https://cpan.metacpan.org -n Mojolicious Mojo::Pg 3 | COPY . /usr/src/myapp 4 | WORKDIR /usr/src/myapp 5 | CMD [ "perl", "./app.pl" , "cgi"] 6 | -------------------------------------------------------------------------------- /result/app.pl: -------------------------------------------------------------------------------- 1 | use Mojolicious::Lite; 2 | use Mojo::Pg; 3 | 4 | helper pg => sub { state $pg = Mojo::Pg->new('postgresql://postgres@db/postgres') }; 5 | 6 | get '/votes' => sub { 7 | my $c = shift; 8 | 9 | my %data; 10 | my $results = $c->pg->db->query("SELECT vote, COUNT(id) AS count FROM votes GROUP BY vote"); 11 | while (my $next = $results->hash) { 12 | $data{$next->{vote}} = $next->{count}; 13 | } 14 | $c->render(json => {%data}); 15 | }; 16 | 17 | get '/' => sub { 18 | my $c = shift; 19 | $c->app->static->serve($c, 'index.html'); 20 | }; 21 | 22 | app->start; 23 | -------------------------------------------------------------------------------- /result/public/app.js: -------------------------------------------------------------------------------- 1 | var app = angular.module('catsvsdogs', []); 2 | // var socket = io.connect({transports:['polling']}); 3 | 4 | var bg1 = document.getElementById('background-stats-1'); 5 | var bg2 = document.getElementById('background-stats-2'); 6 | 7 | app.controller('statsCtrl', function($scope, $http, $timeout){ 8 | var animateStats = function(a,b){ 9 | if(a+b>0){ 10 | var percentA = a/(a+b)*100; 11 | var percentB = 100-percentA; 12 | bg1.style.width= percentA+"%"; 13 | bg2.style.width = percentB+"%"; 14 | } 15 | }; 16 | 17 | $scope.aPercent = 50; 18 | $scope.bPercent = 50; 19 | 20 | var updateScores = function(data){ 21 | var a = parseInt(data.a || 0); 22 | var b = parseInt(data.b || 0); 23 | 24 | animateStats(a, b); 25 | 26 | if(a + b > 0){ 27 | $scope.aPercent = a/(a+b) * 100; 28 | $scope.bPercent = b/(a+b) * 100; 29 | $scope.total = a + b; 30 | } 31 | }; 32 | 33 | var getScores = function() { 34 | $http({ 35 | method: 'GET', 36 | url: '/result/votes' 37 | }).then(function successCallback(response) { 38 | updateScores(response.data); 39 | }, function errorCallback(response) { 40 | console.log(response); 41 | }); 42 | 43 | $timeout(getScores, 2000); 44 | }; 45 | 46 | var init = function(){ 47 | document.body.style.opacity=1; 48 | getScores(); 49 | }; 50 | init(); 51 | }); 52 | -------------------------------------------------------------------------------- /result/public/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | Cats vs Dogs -- Result 6 | 7 | 8 | 9 | 122 | 123 | 124 |
125 |
126 |
128 |
129 |
130 |
131 |
132 |
133 |
134 |
Cats
135 |
{{aPercent | number:1}}%
136 |
137 |
138 |
139 |
Dogs
140 |
{{bPercent | number:1}}%
141 |
142 |
143 |
144 |
145 |
146 | {{total}} votes 147 |
148 | 149 | 150 | 151 | 152 | -------------------------------------------------------------------------------- /vote/Dockerfile: -------------------------------------------------------------------------------- 1 | # Using official python runtime base image 2 | FROM python:2.7-alpine 3 | 4 | # Set the application directory 5 | WORKDIR /app 6 | 7 | # Install our requirements.txt 8 | ADD requirements.txt /app/requirements.txt 9 | RUN pip install -r requirements.txt 10 | 11 | # Copy our code from the current folder to /app inside the container 12 | ADD . /app 13 | 14 | # Make port 80 available for links and/or publish 15 | EXPOSE 80 16 | 17 | # Define our command to be run when launching the container 18 | CMD ["python", "app.py"] 19 | -------------------------------------------------------------------------------- /vote/app.py: -------------------------------------------------------------------------------- 1 | from flask import Flask, render_template, request, make_response 2 | import socket 3 | from wsgiref.handlers import CGIHandler 4 | import os 5 | import random 6 | import dockerrun 7 | 8 | option_a = os.getenv('OPTION_A', "Cats") 9 | option_b = os.getenv('OPTION_B', "Dogs") 10 | hostname = socket.gethostname() 11 | 12 | app = Flask(__name__) 13 | 14 | client = dockerrun.from_env(version="1.24") 15 | 16 | @app.route("/", methods=['POST','GET']) 17 | def hello(): 18 | voter_id = request.cookies.get('voter_id') 19 | if not voter_id: 20 | voter_id = hex(random.getrandbits(64))[2:-1] 21 | 22 | vote = None 23 | 24 | if request.method == 'POST': 25 | vote = request.form['vote'] 26 | client.run( 27 | "bfirsh/serverless-record-vote-task", 28 | [voter_id, vote], 29 | detach=True, 30 | network_mode="serverlessdockervotingapp_default" 31 | ) 32 | 33 | resp = make_response(render_template( 34 | 'index.html', 35 | option_a=option_a, 36 | option_b=option_b, 37 | hostname=hostname, 38 | vote=vote, 39 | )) 40 | resp.set_cookie('voter_id', voter_id) 41 | return resp 42 | 43 | 44 | if __name__ == "__main__": 45 | CGIHandler().run(app) 46 | -------------------------------------------------------------------------------- /vote/requirements.txt: -------------------------------------------------------------------------------- 1 | Flask 2 | Redis 3 | dockerrun==0.1.4 4 | -------------------------------------------------------------------------------- /vote/templates/index.html: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | 5 | {{option_a}} vs {{option_b}}! 6 | 7 | 8 | 9 | 10 | 141 | 142 | 143 | 144 |
145 |
146 |

{{option_a}} vs {{option_b}}!

147 |
148 | 149 | 150 |
151 |
152 | (Tip: you can change your vote) 153 |
154 |
155 | Processed by container ID {{hostname}} 156 |
157 |
158 |
159 | 160 | 161 | 162 | {% if vote %} 163 | 177 | {% endif %} 178 | 179 | 180 | --------------------------------------------------------------------------------