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
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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
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● 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
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● 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

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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

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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

Docker Continuous Delivery Workshop

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