Docker Introduction - Speaker Deck

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Geoffrey Bachelet – @ubermuda What it is. What it can do for you.

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Who am I? • Geoffrey Bachelet • @ubermuda • Then: Lagardère, SensioLabs, KnpLabs, and PMSIPilot. • Now: Stage1, Gustave, Freelance.

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Go!

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"Container Engine" Based on the Linux kernel's LXC instructions Processes and resources isolation "chroot" on steroids / super lightweight VMs

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Containers vs VMs LXC / Jails / etc Use the host's kernel Boots in seconds 0 overhead, almost Easy to pass around Hypervisor Boots a complete OS Boots in... more time. All an OS' overhead Several Go images

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Docker vs Vagrant Less mature (1 year) 379 contributors Manages containers Dockerﬁle (homegrown DSL) DIY Mature (4 years) 338 contributors Manages... VMs. Vagrantﬁle (Ruby) Chef, Puppet, etc

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$ echo "deb https://get.docker.io/ubuntu docker main" \ > /etc/apt/sources.list.d/docker.list $ apt-‐get update $ apt-‐get install lxc-‐docker

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Create a container

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$ docker search ubuntu ! $ docker run -‐i -‐t stackbrew/ubuntu /bin/bash Unable to find image 'stackbrew/ubuntu' locally Pulling repository stackbrew/ubuntu ... ! root@21d86a0b8387:/#

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$ docker search ubuntu ! $ docker run -‐i -‐t stackbrew/ubuntu /bin/bash Unable to find image 'stackbrew/ubuntu' locally Pulling repository stackbrew/ubuntu ... ! root@21d86a0b8387:/#

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credit: http:/ /docs.docker.io/en/latest/terms/image/

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$ docker search ubuntu ! $ docker run -‐i -‐t stackbrew/ubuntu /bin/bash Unable to find image 'stackbrew/ubuntu' locally Pulling repository stackbrew/ubuntu ... ! root@21d86a0b8387:/#

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credit: http:/ /docs.docker.io/en/latest/terms/image/

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$ docker search ubuntu ! $ docker run -‐i -‐t stackbrew/ubuntu /bin/bash Unable to find image 'stackbrew/ubuntu' locally Pulling repository stackbrew/ubuntu ... ! root@21d86a0b8387:/#

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Commit the container

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root@21d86a0b8387:/# apt-‐get install nginx root@21d86a0b8387:/# exit ! $ docker ps -‐q -‐n 1 9cc9c762a0eb ! $ docker commit 9cc9c762a0eb m6web/nginx 240198b750c3cc950c60005d6d24cae4fc2dbcc6c31e274574af68d4a2e8 ! $ docker images REPOSITORY TAG IMAGE ID m6web/nginx latest 240198b750c3

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root@21d86a0b8387:/# apt-‐get install nginx root@21d86a0b8387:/# exit ! $ docker ps -‐q -‐n 1 9cc9c762a0eb ! $ docker commit 9cc9c762a0eb m6web/nginx 240198b750c3cc950c60005d6d24cae4fc2dbcc6c31e274574af68d4a2e8 ! $ docker images REPOSITORY TAG IMAGE ID m6web/nginx latest 240198b750c3

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root@21d86a0b8387:/# apt-‐get install nginx root@21d86a0b8387:/# exit ! $ docker ps -‐q -‐n 1 9cc9c762a0eb ! $ docker commit 9cc9c762a0eb m6web/nginx 240198b750c3cc950c60005d6d24cae4fc2dbcc6c31e274574af68d4a2e8 ! $ docker images REPOSITORY TAG IMAGE ID m6web/nginx latest 240198b750c3

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root@21d86a0b8387:/# apt-‐get install nginx root@21d86a0b8387:/# exit ! $ docker ps -‐q -‐n 1 9cc9c762a0eb ! $ docker commit 9cc9c762a0eb m6web/nginx 240198b750c3cc950c60005d6d24cae4fc2dbcc6c31e274574af68d4a2e8 ! $ docker images REPOSITORY TAG IMAGE ID m6web/nginx latest 240198b750c3

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root@21d86a0b8387:/# apt-‐get install nginx root@21d86a0b8387:/# exit ! $ docker ps -‐q -‐n 1 9cc9c762a0eb ! $ docker commit 9cc9c762a0eb m6web/nginx 240198b750c3cc950c60005d6d24cae4fc2dbcc6c31e274574af68d4a2e8 ! $ docker images REPOSITORY TAG IMAGE ID m6web/nginx latest 240198b750c3

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Run the image

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$ docker run -‐p 80 m6web/nginx nginx -‐g 'daemon off;'

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$ docker ps CONTAINER ID ... PORTS 923cb190dbc3 ... 0.0.0.0:49155-‐>80/tcp ! $ curl http://localhost:49155 Welcome to nginx! ...

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Dockerﬁle

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credit: http:/ /docs.docker.io/en/latest/terms/image/

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FROM stackbrew/ubuntu ! RUN apt-‐get update -‐y RUN apt-‐get install nginx -‐y RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! EXPOSE 80 ENTRYPOINT ["nginx"]

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FROM stackbrew/ubuntu ! RUN apt-‐get update -‐y RUN apt-‐get install nginx -‐y RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! EXPOSE 80 ENTRYPOINT ["nginx"]

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FROM stackbrew/ubuntu ! RUN apt-‐get update -‐y RUN apt-‐get install nginx -‐y RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! EXPOSE 80 ENTRYPOINT ["nginx"]

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FROM stackbrew/ubuntu ! RUN apt-‐get update -‐y RUN apt-‐get install nginx -‐y RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! EXPOSE 80 ENTRYPOINT ["nginx"]

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FROM stackbrew/ubuntu ! RUN apt-‐get update -‐y RUN apt-‐get install nginx -‐y RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! EXPOSE 80 ENTRYPOINT ["nginx"]

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$ docker run \ -‐p 8000:80 \ -‐v $(pwd):/usr/share/nginx/www \ m6web/nginx ! $ echo 'Hello, world!' > index.html ! $ curl http://localhost:8000 Hello, world!

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$ docker run \ -‐p 8000:80 \ -‐v $(pwd):/usr/share/nginx/www \ m6web/nginx ! $ echo 'Hello, world!' > index.html ! $ curl http://localhost:8000 Hello, world!

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$ docker run \ -‐p 8000:80 \ -‐v $(pwd):/usr/share/nginx/www \ m6web/nginx ! $ echo 'Hello, world!' > index.html ! $ curl http://localhost:8000 Hello, world!

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$ docker run \ -‐p 8000:80 \ -‐v $(pwd):/usr/share/nginx/www \ m6web/nginx ! $ echo 'Hello, world!' > index.html ! $ curl http://localhost:8000 Hello, world!

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Now what?

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credit: http:/ /robtiffany.com/5-steps-to-containerize-your-apps/

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FROM stackbrew/ubuntu ! ENV DEBIAN_FRONTEND noninteractive ! RUN apt-‐get update -‐y RUN apt-‐get install -‐y daemontools curl nginx \ php5-‐fpm php5-‐cli php5-‐mysqlnd php5-‐intl \ mysql-‐server ! RUN curl -‐sS https://getcomposer.org/installer | php RUN mv composer.phar /usr/local/bin/composer ! RUN echo "daemonize=no" > /etc/php5/fpm/pool.d/daemonize.conf RUN echo "\ndaemon off;" >> /etc/nginx/nginx.conf ! ADD services /srv/services RUN find /srv/services -‐name run -‐exec chmod +x {} \; ! ADD nginx.conf /etc/nginx/sites-‐enabled/default ADD php.ini /etc/php5/fpm/php.ini ADD php.ini /etc/php5/cli/php.ini ADD entrypoint.sh /usr/local/bin/entrypoint.sh ! EXPOSE 80 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

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FROM stackbrew/ubuntu ENV DEBIAN_FRONTEND noninteractive ! RUN apt-‐get update -‐y RUN apt-‐get install -‐y daemontools curl nginx \ php5-‐fpm php5-‐cli php5-‐mysqlnd php5-‐intl \ mysql-‐server ! RUN echo "daemonize=no" \ > /etc/php5/fpm/pool.d/daemonize.conf RUN echo "\ndaemon off;" \ >> /etc/nginx/nginx.conf

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FROM stackbrew/ubuntu ENV DEBIAN_FRONTEND noninteractive ! RUN apt-‐get update -‐y RUN apt-‐get install -‐y daemontools curl nginx \ php5-‐fpm php5-‐cli php5-‐mysqlnd php5-‐intl \ mysql-‐server ! RUN echo "daemonize=no" \ > /etc/php5/fpm/pool.d/daemonize.conf RUN echo "\ndaemon off;" \ >> /etc/nginx/nginx.conf

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RUN curl -‐sS https://getcomposer.org/installer | php RUN mv composer.phar /usr/local/bin/composer

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ADD services /srv/services RUN find /srv/services -‐name run -‐exec chmod +x {} \; => services/mysqld/run #!/bin/bash exec mysqld => services/nginx/run #!/bin/bash exec nginx => services/php5-‐fpm/run #!/bin/bash exec php5-‐fpm

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ADD nginx.conf /etc/nginx/sites-‐enabled/default ADD php.ini /etc/php5/fpm/php.ini ADD php.ini /etc/php5/cli/php.ini ADD entrypoint.sh /usr/local/bin/entrypoint.sh

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server { listen 80; ! server_name m6web; access_log /var/log/nginx/access.log; error_log /var/log/nginx/error.log; ! root /var/www/web/; index app_dev.php; ! location / { try_files $uri $uri/ /app_dev.php?$query_string; } ! location ~ [^/]\.php(/|$) { fastcgi_pass 127.0.0.1:9000; include fastcgi_params; } }

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#!/bin/bash cd /var/www composer install exec svscan /srv/services

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EXPOSE 80 ENTRYPOINT ["/usr/local/bin/entrypoint.sh"]

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docker run \ -‐p 8000:80 \ -‐v /project:/var/www \ m6web/symfony2

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alias drun='docker run -‐t \ -‐p 8000:80 \ -‐v $(pwd):/var/www \ m6web/symfony2'

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$ cd /project $ drun Loading composer repositories with package information Installing dependencies (including require-‐dev) from lock file ... ! $ curl http://localhost:8000

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credit: http:/ /www.goinﬂippincrazy.com/2014/03/10/anger-or-happiness-which-is-more-motivating/

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Container Links

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credit: http:/ /www.goinﬂippincrazy.com/2014/03/10/anger-or-happiness-which-is-more-motivating/

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$ docker run -‐name redis m6web/redis $ docker run ... \ -‐link redis:redis \ m6web/symfony2

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$ docker run -‐name redis m6web/redis $ docker run ... \ -‐link redis:redis \ m6web/symfony2

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REDIS_PORT=tcp://172.17.0.44:6379 REDIS_PORT_6379_TCP_PROTO=tcp REDIS_PORT_6379_TCP_PORT=6379 REDIS_PORT_6379_TCP=tcp://172.17.0.44:6379 REDIS_NAME=/crimson_squirrel9/redis REDIS_PORT_6379_TCP_ADDR=172.17.0.44

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REDIS_PORT=tcp://172.17.0.44:6379 REDIS_PORT_6379_TCP_PROTO=tcp REDIS_PORT_6379_TCP_PORT=6379 REDIS_PORT_6379_TCP=tcp://172.17.0.44:6379 REDIS_NAME=/crimson_squirrel9/redis REDIS_PORT_6379_TCP_ADDR=172.17.0.44

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imports: -‐ { resource: parameters.php } app/config/config.yml

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setParameter( 'redis_host', getenv('REDIS_PORT_6379_TCP_ADDR') ); app/config/parameters.php

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setParameter( 'redis_host', getenv('REDIS_PORT_6379_TCP_ADDR') ); app/config/parameters.php

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Volume sharing

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FROM stackbrew/ubuntu VOLUME ["/var/lib/mysql"] ENTRYPOINT ["true"] data container

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FROM stackbrew/ubuntu ENV DEBIAN_FRONTEND noninteractive RUN apt-‐get update -‐y RUN apt-‐get install -‐y mysql-‐server mysql-‐client ADD entrypoint.sh /usr/local/bin/entrypoint.sh ENTRYPOINT ["/usr/local/bin/entrypoint.sh"] mysql container

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#!/bin/bash ! if [ ! -‐f /var/lib/mysql/ibdata1 ]; then mysql_install_db > /dev/null 2> /dev/null fi ! mysqld_safe > /dev/null 2> /dev/null & ! while ! mysqladmin -‐s ping; do echo -‐n .; sleep 1; done; ! exec mysql

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#!/bin/bash ! if [ ! -‐f /var/lib/mysql/ibdata1 ]; then mysql_install_db > /dev/null 2> /dev/null fi ! mysqld_safe > /dev/null 2> /dev/null & ! while ! mysqladmin -‐s ping; do echo -‐n .; sleep 1; done; ! exec mysql

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#!/bin/bash ! if [ ! -‐f /var/lib/mysql/ibdata1 ]; then mysql_install_db > /dev/null 2> /dev/null fi ! mysqld_safe > /dev/null 2> /dev/null & ! while ! mysqladmin -‐s ping; do echo -‐n .; sleep 1; done; ! exec mysql

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#!/bin/bash ! if [ ! -‐f /var/lib/mysql/ibdata1 ]; then mysql_install_db > /dev/null 2> /dev/null fi ! mysqld_safe > /dev/null 2> /dev/null & ! while ! mysqladmin -‐s ping; do echo -‐n .; sleep 1; done; ! exec mysql

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$ docker build -‐t m6web/data data/ $ docker build -‐t m6web/mysql mysql/

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$ docker run -‐name mysql-‐data m6web/data $ docker run -‐i -‐t \ -‐-‐volumes-‐from mysql-‐data \ m6web/mysql ... mysql> create database 'symfony';

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#!/bin/bash ! if [ ! -‐f /var/lib/mysql/ibdata1 ]; then mysql_install_db fi ! exec mysqld_safe entrypoint.sh

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setParameter('redis_host', getenv('REDIS_PORT_6379_TCP_ADDR') ); ! $container-‐>setParameter('database_host', getenv('MYSQL_PORT_3306_TCP_ADDR') ); app/config/parameters.php

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$ docker run -‐name mysql-‐data m6web/data $ docker run -‐name redis m6web/redis $ docker run -‐-‐volumes-‐from mysql-‐data -‐name mysql m6web/mysql $ docker run ... \ -‐link redis:redis \ -‐link mysql:mysql \ m6web/symfony2

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$ docker run -‐name mysql-‐data m6web/data $ docker run -‐name redis m6web/redis $ docker run -‐-‐volumes-‐from mysql-‐data -‐name mysql m6web/mysql $ docker run ... \ -‐link redis:redis \ -‐link mysql:mysql \ m6web/symfony2

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And more! • docker run -d, attach, logs, top, ... • Orchestration (https://github.com/marmelab/gaudi) • Docker Index / local Index • Docker Remote API • Dockerﬁle: USER, WORKDIR, ONBUILD, ... • ...

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Concepts recap. • An image is like a VM image, it contains the hard- drive and some conﬁguration. • Images can be pushed and pulled from an index. • A container is a running instance of an image.

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Concepts recap. • You can commit a terminated container, and you get a reusable image representing the state of that container. • Volumes are like shared directories. Containers can share zero or many volumes. • Containers can be linked to one another.

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Thanks! https://github.com/ubermuda/m6web-docker/ Geoffrey Bachelet – @ubermuda