Docker Continuous Delivery Workshop

Continuous Delivery
Workshop
Jirayut Nimsaeng (Dear)
Docker for DevOps and Continuous Delivery Workshop
October 11, 2014 @ OSS Festival 2014

Docker installation
● Boot2docker for Windows & Mac OS X
Jirayut Nimsaeng
– http://boot2docker.io
– Ready to run Docker with
● VirtualBox 4.3.14 (latest version is 4.3.16)
● Docker latest version (1.2.0)
● Lightweight Linux distribution
● Boot in 5-10s

Docker installation
Jirayut Nimsaeng
● Ubuntu based
– https://docs.docker.com/installation/ubuntulinux/
– Recommend Ubuntu 14.04 64-bit LTS
– curl -sSL https://get.docker.io/ubuntu/ | sudo sh
● Redhat based
– https://docs.docker.com/installation/centos/
– Recommend CentOS 7
– EPEL repository enabled first
– sudo yum install docker-io

Docker architecture
Docker Client
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Host
socket
Docker Daemon
Web Server 80 xxxx
Docker Containers
Database
3306

Boot2docker architecture
2022 2035
2035
Jirayut Nimsaeng
80
Host
Virtualbox VM
22
SSH Docker Daemon
Web Server
boot2docker-vm
80 1024+
Docker Containers
Database
Host-only
80
3306

VirtualBox port forward
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Run first Docker container
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● docker images
● docker pull 10.1.3.227:5000/ubuntu:latest
● docker images
● docker run 10.1.3.227:5000/ubuntu echo “Hello
World”
● docker run -i -t 10.1.3.227:5000/ubuntu /bin/bash
– whoami
– hostname
– cat /etc/*release*
– exit

Docker basic operations
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● docker search [name]
● docker pull [name[:tag]]
– docker pull centos
– docker pull ubuntu:latest
● docker run [-itd] [name[:tag]] [command]
● docker ps
● docker ps -a
● docker rm [name or cid]
● docker rm [part of cid]
● docker images
● docker rmi [name:tag or iid]

Image name and tag
● If you do docker command without tag, it will
pull Docker image with every tags
● docker pull 10.1.3.227:5000/ubuntu:12.04
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● docker images
● docker pull 10.1.3.227:5000/ubuntu
● docker images

Create your first image
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● docker run -i -t 10.1.3.227:5000/ubuntu /bin/bash
– vim
– echo 'Acquire::http::Proxy "http://10.1.3.227:3142";' > /etc/apt/apt.conf.d/11proxy
– apt-get update
– apt-get install vim
– touch vim-installed
– ls
– exit
● docker ps -a
● docker commit [cid] ubuntu-vim
● docker images
● docker run -i -t ubuntu-vim /bin/bash
– ls

Docker registry operation
● Register your account at https://hub.docker.com
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● You can pull without logging-in
● docker login
● docker push ubuntu-vim
● docker tag ubuntu-vim winggundamth/ubuntu-vim
● docker images
● docker push winggundamth/ubuntu-vim
● docker pull xxx/ubuntu-vim

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Expose ports
● ifconfig eth1
● docker run -i -t -p 80:80 ubuntu-vim /bin/bash
– apt-get install apache2
– service apache2 start
– Go to browser: http://ipaddress
– exit
● Commit your apache2 container as ubuntu-apache2
with tag 14.04 and latest
● Clear your stopped containers

Run as daemon & expose port option
Jirayut Nimsaeng
● docker run ubuntu-apache2
● docker run -d ubuntu-apache2 service apache2 start
● docker run -d ubuntu-apache2 apachectl
-DFOREGROUND
● docker run -d -p 80:80 ubuntu-apache2 apachectl
-DFOREGROUND
● docker run -d -p 8880:80 ubuntu-apache2 apachectl
-DFOREGROUND
● docker run -d -p 80 ubuntu-apache2 apachectl
-DFOREGROUND
● docker ps

Docker container operation
Jirayut Nimsaeng
● docker ps
● docker stop [container id or name]
● docker start [container id or name]
● docker kill [container id or name]
● docker logs [container id or name]
● docker diff [container id or name]
● docker top [container id or name]
● docker inspect [container id or name]

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Dockerfile
● Create filename Dockerfile
● Dockerfile Syntax
– FROM - defines base image
– MAINTAIN – author information
– RUN – executes command
– ENV – sets environment
– EXPOSE – expose a port
– ADD – add local file
– CMD – default command to execute
● Execute Dockerfile with command docker build
● Docker will keep cache when execute each command above
– Use docker build -–no-cache if you want to build without cache

SSH Image to Dockerfile
FROM ubuntu-vim
RUN apt-get install -y openssh-server
RUN sed -i 's/required pam_loginuid.so/optional
pam_loginuid.so/g' /etc/pam.d/sshd
RUN sed -i 's/PermitRootLogin without-password/
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PermitRootLogin yes/g'
/etc/ssh/sshd_config
RUN mkdir /var/run/sshd
RUN echo "root:test1234" | chpasswd
CMD /usr/sbin/sshd -D
EXPOSE 22

Build & run image from Dockerfile
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● vi Dockerfile
● docker build -t ubuntu-ssh .
● docker images
● docker run -d -p 2230:22 ubuntu-ssh
● docker ps
● ssh -p 2230 root@localhost

Let's deploy WordPress
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Host
Docker Daemon
Apache
Wordpress
80 80
Docker Containers
MySQL
3306

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Build MySQL
FROM ubuntu-vim
ENV DEBIAN_FRONTEND noninteractive
RUN echo 'mysql-server mysql-server/root_password password
test1234' | debconf-set-selections
RUN echo 'mysql-server mysql-server/root_password_again
password test1234' | debconf-set-selections
RUN apt-get install -y mysql-server
RUN sed -i 's/bind-address/#bind-address/g' /etc/mysql/my.cnf
RUN service mysql start &&
mysql -u root -ptest1234 -e "CREATE DATABASE wordpress
CHARACTER SET utf8 COLLATE utf8_general_ci;" &&
mysql -u root -ptest1234 -e "GRANT ALL PRIVILEGES ON wptest.*
TO wptest@'%' IDENTIFIED BY 'wptest' WITH GRANT OPTION;"
CMD /usr/bin/mysqld_safe
EXPOSE 3306

Jirayut Nimsaeng
Build Apache
FROM ubuntu-vim
RUN apt-get install -y libapache2-mod-php5 php5
php5-mysql php5-curl
ADD wordpress /var/www/wordpress
ADD default /etc/apache2/sites-available/000-
default.conf
RUN a2enmod rewrite
RUN chown -R www-data:www-data /var/www
CMD apachectl -DFOREGROUND
EXPOSE 80

Apache Configuration
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<VirtualHost *:80>
DocumentRoot /var/www/wordpress
<Directory /var/www/wordpress>
AllowOverride All
</Directory>
ErrorLog ${APACHE_LOG_DIR}/error.log
CustomLog ${APACHE_LOG_DIR}/access.log
combined
</VirtualHost>

Wordpress Configuration
● wget http://10.1.3.227:8000/wordpress-
4.0.tar.gz
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● tar xvfz wordpress-4.0.tar.gz

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Run it
● docker run -d -p 3306:3306 --name mysql
ubuntu-mysql
● docker run -d -p 80:80 ubuntu-wp
● Go to http://192.168.59.103
– Use 172.17.42.1 as database host ip

Continuous Delivery with Docker
5.Get Wordpress Code
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MySQL Data Image
MySQL
Dockerfile
Data MySQL Data Image
Docker Engine
Host 1 (Dev/Build Server)
Docker
Registry
Host 2 (Container Server)
1.Build
3.Push
7.Pull
8.Run
Docker Engine
Container MySQL Data
Backup
Server
2.Get DB Backup
Repository
Server
Wordpress
4.Build Dockerfile
Wordpress Image
6.Push
Wordpress Image
Container Wordpress

Jirayut Nimsaeng
Build MySQL
FROM ubuntu-vim
RUN echo 'mysql-server mysql-server/root_password password test1234' | debconf-set-
selections
RUN echo 'mysql-server mysql-server/root_password_again password test1234' |
debconf-set-selections
RUN apt-get install -y mysql-server wget
RUN wget http://10.1.3.227:8000/wptest.sql
RUN sed -i 's/bind-address/#bind-address/g' /etc/mysql/my.cnf
RUN service mysql start &&
mysql -u root -ptest1234 -e "CREATE DATABASE wptest CHARACTER SET utf8
COLLATE utf8_general_ci;" &&
mysql -u root -ptest1234 -e "GRANT ALL PRIVILEGES ON wptest.* TO wptest@'%'
IDENTIFIED BY 'wptest' WITH GRANT OPTION;"
mysql -u root -ptest1234 wptest < wptest.sql &&
service mysql stop
CMD /usr/bin/mysqld_safe
EXPOSE 3306

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