Docker c'est bonheur

Transcript

1. Docker, c'est bonheur
   

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2. 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 ?
   

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3. Docker et vous ?
   

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4. Sommaire
   ●
   Présentation
   ●
   Utilisation
   – Dockerfile
   – Commandes usuelles
   – Registry
   – Volumes
   – Port mapping
   – Links
   ●
   Outils
   – Fig
   – Baseimage
   – Boot2Docker
   – Flynn
   

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5. Présentation de Docker
   Les grandes idées
   

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7. Avantages
   ●
   Exécution rapide, isolée et transportable
   ●
   Mise en commun des ressources
   

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9. 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
   

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10. Utilisation
    Commandes usuelles
    

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11. 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
    

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12. 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
    

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13. 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
    `-._ `-._`-.__.-'_.-' _.-'
    |`-._`-._ `-.__.-' _.-'_.-'|
    | `-._`-._ _.-'_.-' |
    `-._ `-._`-.__.-'_.-' _.-'
    `-._ `-.__.-' _.-'
    `-._ _.-'
    `-.__.-'
    

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14. 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
    

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15. 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 :
    

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16. Commandes usuelles
    $ docker run -d --name=mon_redis redis
    $ docker stop mon_redis
    Démarrer en arrière plan avec -d :
    Arrêter un conteneur :
    

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17. Commandes usuelles
    $ docker exec mon_redis ls /etc
    Exécuter une commande dans un conteneur démarré :
    

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18. Commandes usuelles
    $ docker rmi redis
    Supprimer une image
    $ docker rm mon_redis
    Supprimer un conteneur
    $ docker stop mon_redis
    Arrêter un conteneur
    

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19. $ 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
    

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20. Utilisation
    Dockerfile
    

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21. 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
    

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22. Image
    Image
    Dockerfile
    FROM ubuntu:14.10
    [...]
    [...]
    [...]
    Image
    Image
    Conteneur
    Conteneur
    Conteneur
    

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23. 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
    ...
    

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24. 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
    

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25. Utilisation
    Registry
    

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26. Docker Registry
    Client (vous) Registry
    PUSH
    PULL
    Intégration continue
    PUSH
    Sourcecode
    PUSH
    Stocker les images pour éviter les constructions
    

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27. Registry
    $ docker tag alex/apache registry.acme.org/alex/apache
    $ docker push registry.acme.org/alex/apache
    

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28. 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
    

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29. 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
    

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30. 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
    

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31. 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
    

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32. Outils
    

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33. 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
    

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34. phusion/baseimage
    ●
    Framework pour conteneurs Docker
    ●
    Multi-process assumé
    

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35. boot2docker
    ●
    Pour les utilisateurs Mac
    ●
    Bon courage, surtout pour les volumes
    Macintosh
    VirtualBox
    Linux
    Docker
    

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36. Mais aussi…
    ●
    Flynn : automatisation des déploiements
    ●
    Shipyard : Docker management
    ●
    Mesos & Marathon : Scale
    ●
    Gaudi : fig + UI
    ●
    Panamax : gestionnaire de conteneurs
    

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37. En conclusion
    ●
    Isolez vos projets de votre système
    ●
    Versionnez vos Dockerfile
    ●
    Automatisez la construction de vos projets
    

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