Kbaran1 at 19:24, 12 April 2022

2022-04-12T19:24:29Z

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[[Category:Docker]]
[[Category:course_code_dockcm]]

{{Copyright Notice}}

== Author ==
* [http://www.kamilbaran.pl Kamil Baran]
<br />

== Docker Compose Installation ==
<syntaxhighlight lang="Bash">
$ sudo -i
$ curl -L https://github.com/docker/compose/releases/download/1.26.2/docker-compose-`uname -s`-`uname -m` > /usr/local/bin/docker-compose
$ chmod +x /usr/local/bin/docker-compose
$ curl -L https://raw.githubusercontent.com/docker/compose/$(docker-compose version --short)/contrib/completion/bash/docker-compose > /etc/bash_completion.d/docker-compose
$ exit
$ docker-compose --version
</syntaxhighlight>
* more info: docs.docker.com/compose/install
<br />

== Wordpress Example ==

=== Start Wordpress without Docker Compose ===
To start a Wordpress site in containers, you need to complete following steps:
# create custom network for the application
# create volume for database container
# create volume for web server container
# create database container
# create web server container

The commands below represents an example of all required steps:
<syntaxhighlight lang="Bash">
$ docker network create wordpress_net
$ docker volume create wordpress_mysql_data
$ docker volume create wordpress_html
$ docker run -d --name wordpress_mysql --network wordpress_net -v wordpress_mysql_data:/var/lib/mysql -e MYSQL_ROOT_PASSWORD=NobleProg -e MYSQL_DATABASE=wordpress -e MYSQL_USER=wordpress -e MYSQL_PASSWORD=wordpress mysql:5.7
$ docker run -d --name wordpress_apache --network wordpress_net -v wordpress_html:/var/www/html -p 80:80 -e WORDPRESS_DB_HOST=wordpress_mysql:3306 -e WORDPRESS_DB_USER=wordpress -e WORDPRESS_DB_PASSWORD=wordpress wordpress:php7.2-apache
</syntaxhighlight>

When you want to delete your Wordpress site completely you need to remove containers, volumes and network by executing following commands:
<syntaxhighlight lang="Bash">
$ docker container rm -f wordpress_mysql wordpress_apache
$ docker volume rm wordpress_mysql_data wordpress_html
$ docker network rm wordpress_net
</syntaxhighlight>

=== Start Wordpress with Docker Compose ===
Docker Compose allows you to manage your multi-container applications by running a straightforward command.
For example, to start, stop and remove Wordpress site, you need to execute following commands accordingly:
<syntaxhighlight lang="Bash">
$ docker-compose up -d
$ docker-compose stop
$ docker-compose down --volumes
</syntaxhighlight>

There are only a few things you need to do before you can start Wordpress site by using Docker Compose:
# Install Docker Compose (usually it's not installed with Docker)
# create a docker-compose.yml (or .yaml) in an empty directory containing following content
# run above commands in the same directory where the docker-compose.yml file is located (or use -f option to specify a path to the file).
<syntaxhighlight lang="yaml">
version: '3'
services:
mysql:
image: mysql:latest
volumes:
- mysql_data:/var/lib/mysql
environment:
- MYSQL_ROOT_PASSWORD=NobleProg
- MYSQL_DATABASE=wordpress
- MYSQL_USER=wordpress
- MYSQL_PASSWORD=wordpress
networks:
- net
apache:
depends_on:
- mysql
image: wordpress:latest
volumes:
- html:/var/www/html
ports:
- 80:80
environment:
- WORDPRESS_DB_HOST=mysql:3306
- WORDPRESS_DB_USER=wordpress
- WORDPRESS_DB_PASSWORD=wordpress
networks:
- net
volumes:
mysql_data:
html:
networks:
net:
</syntaxhighlight>
<br />

== Mongo Counter Example ==
* create an empty directory called mc-app
* copy content from httpd (Dockerfile and html directory) and mongodb (Dockerfile) directories created previously
* create a docker-compose.yml file containing below configuration
<syntaxhighlight lang="Bash">
version: '3'
services:
httpd:
build: ./httpd
image: kamilbaran/training:httpd
network_mode: host
mongo:
build: ./mongo
image: kamilbaran/training:mongo
network_mode: host
</syntaxhighlight>

* in order to build all images at once and start entire application run below command
<syntaxhighlight lang="Bash">
$ docker-compose up --build -d
</syntaxhighlight>

* more information about options available in docker-compose files: docs.docker.com/compose/compose-file
<br />

Docker Compose - Revision history

Kbaran1 at 19:24, 12 April 2022