DOCKER The future of web apps deployment Szymon Skórczyński Schibsted Tech Polska PHPers Tricity December 15, 2014 

ONCE UPON A TIME… 

TODAY 

TOP PROBLEMS Isolation from host OS and other environments Traceability of configuration changes Portability to share with colleagues and deploy easily 

YESTERDAY’S SOLUTION Virtualization Provisioning Orchestration 

GOOD, BUT NOT PERFECT 

TODAY’S SOLUTION 

KEY FACTS • written in Go in dotCloud, a PaaS provider • became open source in March 2013 • in June 2014 released stable ver. 1.0 • current version is 1.4 

POPULARITY angular.js laravel symfony ansible vagrant chef puppet 0 10 000 20 000 30 000 40 000 2 779 3 186 8 088 8 518 9 274 13 251 17 092 32 145 Number of stars on GitHub (November 28, 2014) docker 

PARTNERS 

THE METAPHOR 

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HOW DOES IT WORK? 

THE ECOSYSTEM Image is like OVF or ISO Container is a running image Repository is a place to store images 

THE DIFFERENCE Host OS Hypervisor Guest OS Guest OS Guest OS bins/libs bins/libs bins/libs App A App A` App B Host OS Docker bins/libs bins/libs App A App A’ App B App B’ App B’ App B’ VM Docker container Docker Standard VMs 

ADVANTAGES 

USAGE docker pull downloads an image docker run starts a container docker commit saves changes in an image docker push uploads an image 

DEMO 

LESSONS LEARNED AT SCHIBSTED 

ISSUE #1 ONE CONTAINER 

DOCKERFILE ### Install Supervisor RUN apt-get install -y supervisor && mkdir -p /var/log/ supervisor ADD docker/supervisord.conf /etc/supervisor/conf.d/ supervisord.conf ### Install SSH, MongoDB, PHP, Apache2, composer ### (...) CMD supervisord -c /etc/supervisor/conf.d/ supervisord.conf 

SUPERVISORD.CONF [supervisord] nodaemon=true logfile=/var/www/phpers/app/logs/supervisord.log loglevel=debug [program:sshd] command=/usr/sbin/sshd -D [program:mongod] command=/usr/bin/mongod --smallfiles autorestart=true [program:apache2] command=/bin/bash -c "source /etc/apache2/envvars && exec /usr/sbin/apache2ctl -DFOREGROUND" 

ISSUE #2 WORKING ON MAC 

VAGRANT + DOCKER Host (MacOS) Vagrant Proxy VM (Ubuntu) Docker Container Supervisor Apache MongoDB 

VAGRANTFILE VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.ssh.username="root" config.vm.provider "docker" do |d| d.name = "phpers" d.build_dir = "." d.ports = ["80:80", "27017:27017"] d.volumes = [ "/vagrant/:/var/www/phpers:rw", "/data/db/:/data/db:rw" ] d.vagrant_vagrantfile = "proxy/Vagrantfile.proxy" end end 

VAGRANTFILE.PROXY VAGRANTFILE_API_VERSION = "2" Vagrant.configure(VAGRANTFILE_API_VERSION) do |config| config.vm.box = "ubuntu/trusty64" config.vm.provision "docker" config.vm.provision "shell", inline: "ps aux | grep 'sshd:' | awk '{print $2}' | xargs kill" config.vm.network "private_network", ip: "192.168.33.12" config.vm.network "forwarded_port", guest: 80, host: 80 config.vm.network "forwarded_port", guest: 27017, host: 27017 config.vm.synced_folder "./../", "/vagrant", type: "nfs" config.vm.provider "virtualbox" do |v| v.name = "PHPers" v.memory = 2048 end end 

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ISSUE #3 THE PROCESS 

DEVELOPERS SITE sources with dockerfile Developer GitHub build image run image 

REMOTE SITE sources dockerfile image image sources image GitHub CircleCI AWS Docker Hub build image build with run with run with fire! 

REMOTE SITE sources dockerfile image image with sources image GitHub CircleCI AWS Docker Hub build build image with sources run image with sources run with fire! 

REMOTE SITE sources dockerfile image image sources image with sources GitHub CircleCI AWS Docker Hub build build with run with run image with sources fire! 

REMOTE SITE sources dockerfile image image with sources image with sources GitHub CircleCI AWS Docker Hub build image build image with sources run image with sources run image with sources fire! 

SHOULD YOU TRY DOCKER? 

REPOS https://github.com/sskorc/docker-silex https://github.com/sskorc/docker-symfony https://registry.hub.docker.com/u/sskorc/silex 

THAT’S ALL, THANKS! @sskorc