First steps to docker
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This document introduces some first steps for setting up a new development workflow using Docker containers, including pulling a Debian image, running a container interactively, building a custom Dockerfile, running linked containers for a web app and database, and accessing the database from the web container.
![[Yem@home]-[/var/www] $ docker pull debian:wheezy
[Yem@home]-[/var/www] $ docker run -i -t debian:wheezy /bin/bash
root@e3cfb271ab6e:/#
Run a container
[Yem@home]-[/var/www] $ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL
SIZE
debian wheezy 1265e16d0c28 2 days ago 84.98 MB](https://image.slidesharecdn.com/firststepstodocker-150410032206-conversion-gate01/85/First-steps-to-docker-9-320.jpg)
![Build & Run
[Yem@home]-[/var/www] $ docker build -t app ./
[Yem@home]-[/var/www] $ docker images
REPOSITORY TAG IMAGE ID CREATED VIRTUAL
SIZE
app latest 98a0cc8f6e58 6 seconds ago 169.9 MB
debian wheezy 1265e16d0c28 2 days ago 84.98 MB
[Yem@home]-[/var/www] $ docker run -d -P app
2c7082ee3b572d0743c0f09ecbab8a27a9a6ab70d354f901dc781feb1c835d21
[Yem@home]-[/var/www] $ docker ps
CONTAINER ID IMAGE COMMAND CREATED STATUS
PORTS NAMES
9330f7f0947d app:latest "./usr/sbin/apache2c 15 minutes ago Up 15
minutes 0.0.0.0:49153->3306/tcp clever_feynman](https://image.slidesharecdn.com/firststepstodocker-150410032206-conversion-gate01/85/First-steps-to-docker-11-320.jpg)
![[Yem@home]-[/var/www] $ docker run -d -P
--name app-db
-e "MYSQL_ROOT_PASSWORD=root"
mariadb:10
Run a database](https://image.slidesharecdn.com/firststepstodocker-150410032206-conversion-gate01/85/First-steps-to-docker-14-320.jpg)
![[Yem@home]-[/var/www] $ docker run -d -P
--name app-db
-e "MYSQL_ROOT_PASSWORD=root"
mariadb:10
Link containers 1/2
[Yem@home]-[/var/www] $ docker run -d -P
--name app-web
--link app-db:db
app
/bin/bash](https://image.slidesharecdn.com/firststepstodocker-150410032206-conversion-gate01/85/First-steps-to-docker-15-320.jpg)
First steps to docker
- 1. First steps to a new development workflow Guilhem Marty (@le_pixel) 1001pharmacies.com @1001pharmaDev
- 4. OS Host Machine Hypervisor Guest OS Guest OS Guest OS Guest OS App 1 App 2 App 2’ App 3 DB DB AMPQ Bins/Libs Bins/Libs Bins/LibsBins/Libs
- 7. LXC
- 8. OS Host Machine Docker App 1 App 2 App 2’ App 3 Bins/Libs Bins/LibsBins/Libs
- 9. [Yem@home]-[/var/www] $ docker pull debian:wheezy [Yem@home]-[/var/www] $ docker run -i -t debian:wheezy /bin/bash root@e3cfb271ab6e:/# Run a container [Yem@home]-[/var/www] $ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE debian wheezy 1265e16d0c28 2 days ago 84.98 MB
- 10. FROM debian:wheezy Dockerfile ENV DEBIAN_FRONTEND noninteractive RUN apt-get update && apt-get install -y apache2 php5 mysql-client EXPOSE 80 CMD ./usr/sbin/apache2ctl -D FOREGROUND
- 11. Build & Run [Yem@home]-[/var/www] $ docker build -t app ./ [Yem@home]-[/var/www] $ docker images REPOSITORY TAG IMAGE ID CREATED VIRTUAL SIZE app latest 98a0cc8f6e58 6 seconds ago 169.9 MB debian wheezy 1265e16d0c28 2 days ago 84.98 MB [Yem@home]-[/var/www] $ docker run -d -P app 2c7082ee3b572d0743c0f09ecbab8a27a9a6ab70d354f901dc781feb1c835d21 [Yem@home]-[/var/www] $ docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 9330f7f0947d app:latest "./usr/sbin/apache2c 15 minutes ago Up 15 minutes 0.0.0.0:49153->3306/tcp clever_feynman
- 14. [Yem@home]-[/var/www] $ docker run -d -P --name app-db -e "MYSQL_ROOT_PASSWORD=root" mariadb:10 Run a database
- 15. [Yem@home]-[/var/www] $ docker run -d -P --name app-db -e "MYSQL_ROOT_PASSWORD=root" mariadb:10 Link containers 1/2 [Yem@home]-[/var/www] $ docker run -d -P --name app-web --link app-db:db app /bin/bash
- 16. Link containers 2/2 root@55d016720713:/# cat /etc/hosts 172.17.0.4 55d016720713 127.0.0.1 localhost ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters 172.17.0.2 db root@55d016720713:/# mysql -u root -proot -h db -e "SHOW DATABASES;" +--------------------+ | Database | +--------------------+ | information_schema | | mysql | | performance_schema | +--------------------+
- 18. Questions ?