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Docker c'est bonheur

Docker c'est bonheur

Alexandre Salomé

January 15, 2015
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  1. Qui je suis • Alexandre Salomé, développeur (180 mois) •

    Consultant technique chez SensioLabs (66 mois) • En mission chez Auchan e-commerce France (7 mois) – Environnement totalement dockerisé – Bientôt les serveurs de qualification – Dans 3 ans en production ?
  2. Sommaire • Présentation • Utilisation – Dockerfile – Commandes usuelles

    – Registry – Volumes – Port mapping – Links • Outils – Fig – Baseimage – Boot2Docker – Flynn
  3. Show time ! La différence du dossier /etc entre :

    - Ubuntu 14.10 - Ubuntu 12.10 docker run ubuntu:14.10 ls /etc > etc-14.10 docker run ubuntu:12.10 ls /etc > etc-12.10 meld etc-14.10 etc-12.10
  4. Commandes usuelles $ docker run --name=mon_redis redis Donner un nom

    à son conteneur avec --name : docker run redis docker run ubuntu:14.10 ls /etc
  5. Commandes usuelles $ docker ps CONTAINER ID IMAGE CREATED STATUS

    NAMES eb232dde2f79 redis:latest 3 seconds ago Up 2 seconds mon_redis $ docker ps -a CONTAINER ID IMAGE CREATED STATUS PORTS NAMES eb232dde2f79 redis:latest 2 minutes ago Up 2 minutes 6379/tcp mon_redis b715035816d7 redis:latest 4 minutes ago Exited (0) 4 minutes ago sharp_wozniak
  6. Commandes usuelles $ docker logs mon_redis [1] 14 Jan 19:35:02.096

    # Warning: no config file specified, using the default config. In order to specify a config file use redis-server /path/to/redis.conf _._ _.-``__ ''-._ _.-`` `. `_. ''-._ Redis 2.8.17 (00000000/0) 64 bit .-`` .-```. ```\/ _.,_ ''-._ ( ' , .-` | `, ) Running in stand alone mode |`-._`-...-` __...-.``-._|'` _.-'| Port: 6379 | `-._ `._ / _.-' | PID: 1 `-._ `-._ `-./ _.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | http://redis.io `-._ `-._`-.__.-'_.-' _.-' |`-._`-._ `-.__.-' _.-'_.-'| | `-._`-._ _.-'_.-' | `-._ `-._`-.__.-'_.-' _.-' `-._ `-.__.-' _.-' `-._ _.-' `-.__.-'
  7. Commandes usuelles $ docker inspect mon_redis # ... "Created": "2015-01-14T19:35:01.710341398Z",

    "Id": "eb232dde2f79741d01d3259566bae6150e5846b3e2e9208a9e6e0897084a80c4", "Image": "3ce54e911389a2b08207b0a4d01c3131ce01b617ecc1c248f6d81ffdbebd628d", "State": { "ExitCode": 0, "FinishedAt": "0001-01-01T00:00:00Z", "Paused": false, "Pid": 4362, "Restarting": false, "Running": true, "StartedAt": "2015-01-14T19:35:02.053470372Z" # ... $ docker inspect -f="{{ .NetworkSettings.IPAddress }}" mon_redis 172.17.0.3
  8. Commandes usuelles $ docker diff mon_redis A /tmp/sess_b86hok0pfj23a81ea3flr0rk03 C /tmp/sess_esmblquiab21m995q2d195j1r5

    D /tmp/sess_gl0cmpknk3rirc3l0jmjfd1bo1 C /tmp/sess_ql581nl6ac0uhaj47cftn8ipb7 Afficher le différentiel d'un conteneur :
  9. Commandes usuelles $ docker run -d --name=mon_redis redis $ docker

    stop mon_redis Démarrer en arrière plan avec -d : Arrêter un conteneur :
  10. Commandes usuelles $ docker rmi redis Supprimer une image $

    docker rm mon_redis Supprimer un conteneur $ docker stop mon_redis Arrêter un conteneur
  11. $ docker Commands: attach Attach to a running container build

    Build an image from a Dockerfile commit Create a new image from a container's changes cp Copy files/folders from a container's filesystem to the host path diff Inspect changes on a container's filesystem events Get real time events from the server export Stream the contents of a container as a tar archive history Show the history of an image images List images import Create a new filesystem image from the contents of a tarball info Display system-wide information inspect Return low-level information on a container kill Kill a running container load Load an image from a tar archive login Register or log in to a Docker registry server logout Log out from a Docker registry server logs Fetch the logs of a container port Lookup the public-facing port that is NAT-ed to PRIVATE_PORT pause Pause all processes within a container ps List containers pull Pull an image or a repository from a Docker registry server push Push an image or a repository to a Docker registry server restart Restart a running container rm Remove one or more containers rmi Remove one or more images run Run a command in a new container save Save an image to a tar archive search Search for an image on the Docker Hub start Start a stopped container stop Stop a running container tag Tag an image into a repository top Lookup the running processes of a container unpause Unpause a paused container version Show the Docker version information wait Block until a container stops, then print its exit code
  12. Dockerfile • Recette de construction d'un conteneur • Format de

    fichier simple FROM ubuntu:14.10 ENV APACHE_LOG_DIR /var/log/apache2 RUN apt-get install -y apache2 ADD site.conf /path/to/site.conf EXPOSE 80 CMD ["/usr/sbin/apache2", "-D", "FOREGROUND"] Exemple non fonctionnel, parce que Apache, c'est pas aussi simple Dans cet exemple, le Dockerfile fait 5 lignes
  13. Dockerfile $ vi Dockerfile $ docker run alex/apache $ docker

    build --name=alex/apache . Step 0 : FROM ubuntu:14.10 ---> 75204fdb260b Step 1 : RUN apt-get install apache2 ---> Running in 68992170d55d Reading package lists... Building dependency tree... Reading state information... Step 2 : ... ---> Running in 68992170d55d ...
  14. Dockerfile FROM phusion/baseimage:0.9.13 ENV HOME /root EXPOSE 80 EXPOSE 22

    CMD /sbin/my_init RUN apt-get update RUN apt-get install -y \ git curl \ postgresql \ php5-cli php5-fpm php5-intl php5-mcrypt php5-json php5-pgsql php5-curl \ redis-server \ openjdk-7-jre \ nginx # Setup elasticsearch RUN \ cd /tmp && \ curl -o /tmp/elasticsearch-1.3.2.tar.gz https://download.elasticsearch.org/elasticsearch/elasticsearch/elasti csearch-1.3.2.tar.gz && \ tar xvzf elasticsearch-1.3.2.tar.gz && \ rm -f elasticsearch-1.3.2.tar.gz && \ mv /tmp/elasticsearch-1.3.2 /elasticsearch # Setup postgresql RUN /etc/init.d/postgresql start &&\ sudo -u postgres psql --command "CREATE USER gitonomy WITH SUPERUSER PASSWORD 'gitonomy';" &&\ sudo -u postgres createdb -O gitonomy gitonomy RUN echo "host all all 0.0.0.0/0 md5" >> /etc/postgresql/9.3/main/pg_hba.conf RUN echo "listen_addresses='*'" >> /etc/postgresql/9.3/main/postgresql.conf # Node stuff RUN curl -sL https://deb.nodesource.com/setup | bash - RUN apt-get install -y nodejs RUN npm install -g bower grunt-cli # composer RUN curl -o /tmp/composer http://getcomposer.org/composer.phar; mv /tmp/composer /usr/bin/composer; chmod a+x /usr/bin/composer ADD config/nginx.conf /etc/nginx/nginx.conf ADD config/php-fpm.conf /etc/php5/fpm/pool.d/www.conf ADD service/nginx.sh /etc/service/nginx/run ADD service/php-fpm.sh /etc/service/php-fpm/run ADD service/postgresql.sh /etc/service/postgresql/run ADD service/elasticsearch.sh /etc/service/elasticsearch/run ADD service/redis.sh /etc/service/redis/run ADD startup.sh /etc/my_init.d/gitonomy Dans la vraie vie, les Dockerfile font 200 lignes
  15. Docker Registry Client (vous) Registry PUSH PULL Intégration continue PUSH

    Sourcecode PUSH Stocker les images pour éviter les constructions
  16. Volumes • Permet de partager des dossiers entre les conteneurs

    et le système hôte $ docker run \ -v /home/alex/public:/var/www my_apache Le chemin sur mon système Le chemin dans le conteneur
  17. Port mapping • Permet d'exposer des ports du conteneur sur

    l'hôte $ docker run \ -p 8000:80 my_apache Le port sur mon système Le port dans le conteneur
  18. Links $ docker run \ --link mon_redis:mon_redis ubuntu env MON_REDIS_PORT=tcp://172.17.0.2:6379

    MON_REDIS_PORT_6379_TCP=tcp://172.17.0.2:6379 MON_REDIS_PORT_6379_TCP_ADDR=172.17.0.2 MON_REDIS_PORT_6379_TCP_PORT=6379 MON_REDIS_PORT_6379_TCP_PROTO=tcp
  19. Résumé des fonctionnalités docker run -v /home/alex/public:/var/www -p 8000:80 --link

    project_db --name project_web my_apache docker run --name=project_db my_mysql
  20. fig web: build: . links: - db volumes: - /var/www:/var/www

    ports: - "8000:8000" db: image: postgres $ fig up web $ docker build --name=web . $ docker run -p 8000:8000 -v /var/www:/var/www --link db web
  21. boot2docker • Pour les utilisateurs Mac • Bon courage, surtout

    pour les volumes Macintosh VirtualBox Linux Docker
  22. Mais aussi… • Flynn : automatisation des déploiements • Shipyard

    : Docker management • Mesos & Marathon : Scale • Gaudi : fig + UI • Panamax : gestionnaire de conteneurs
  23. En conclusion • Isolez vos projets de votre système •

    Versionnez vos Dockerfile • Automatisez la construction de vos projets