Podman : Use Docker Compose2023/06/21 |
To Install Docker Compose, it's easy to configure and run multiple containers as a Docker application.
Docker Compose is supported on Podman 3.0 or later. |
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[1] | |
[2] | Install Docker Compose. |
root@dlp:~#
root@dlp:~# apt -y install docker-compose docker-compose --version docker-compose version 1.29.2, build unknown |
[3] | For example, Configure an application that has Web and DB services with Docker Compose. |
FROM debian MAINTAINER ServerWorld <admin@srv.world> RUN apt-get update RUN apt-get -y install nginx RUN echo "Compose Test on Nginx" > /var/www/html/index.html EXPOSE 80 CMD ["/usr/sbin/nginx", "-g", "daemon off;"] version: '3' services: db: image: docker.io/library/mariadb volumes: - /var/lib/containers/disk01:/var/lib/mysql environment: MYSQL_ROOT_PASSWORD: password MYSQL_USER: debian MYSQL_PASSWORD: password MYSQL_DATABASE: debian_db ports: - "3306:3306" web: build: . ports: - "80:80" volumes: - /var/lib/containers/disk02:/usr/share/nginx/html # build and run root@dlp:~# docker-compose up -d Building web Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg. STEP 1/7: FROM debian STEP 2/7: MAINTAINER ServerWorld <admin@srv.world> --> Using cache 00970b06f91f398d68bd80a879f505cde9bf7b0326fee60bda2ee0663008fdff --> 00970b06f91 STEP 3/7: RUN apt-get update ..... ..... Creating root_db_1 ... done Creating root_web_1 ... doneroot@dlp:~# podman ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 7925b61be272 localhost/root_web:latest /usr/sbin/nginx -... 55 seconds ago Up 55 seconds ago 0.0.0.0:80->80/tcp root_web_1 7230fd252ef6 docker.io/library/mariadb:latest mariadbd 55 seconds ago Up 55 seconds ago 0.0.0.0:3306->3306/tcp root_db_1 # verify accesses root@dlp:~# mysql -h 127.0.0.1 -u root -p -e "show variables like 'hostname';" Enter password: +---------------+--------------+ | Variable_name | Value | +---------------+--------------+ | hostname | 7230fd252ef6 | +---------------+--------------+root@dlp:~# mysql -h 127.0.0.1 -u debian -p -e "show databases;" Enter password: +--------------------+ | Database | +--------------------+ | debian_db | | information_schema | +--------------------+root@dlp:~# curl 127.0.0.1 Compose Test on Nginx |
[4] | Other basic operations of Docker Compose are follows. |
# verify state of containers root@dlp:~# docker-compose ps Name Command State Ports --------------------------------------------------------------------- root_db_1 docker-entrypoint.sh mariadbd Up () :3306->3306/tcp root_web_1 /usr/sbin/nginx -g daemon off; Up () :80->80/tcp # show logs of containers root@dlp:~# docker-compose logs Attaching to root_db_1, root_web_1 db_1 | 2023-06-21 00:27:26+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:11.0.2+maria~ubu2204 started. db_1 | 2023-06-21 00:27:26+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql' db_1 | 2023-06-21 00:27:26+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:11.0.2+maria~ubu2204 started. db_1 | 2023-06-21 00:27:26+00:00 [Note] [Entrypoint]: Initializing database files ..... ..... db_1 | 2023-06-21 0:27:31 0 [Note] Server socket created on IP: '::'. db_1 | 2023-06-21 0:27:31 0 [Note] mariadbd: ready for connections. db_1 | Version: '11.0.2-MariaDB-1:11.0.2+maria~ubu2204' socket: '/run/mysqld/mysqld.sock' port: 3306 mariadb.org binary distribution # run any commands inside a container # container name is just the one set in [docker-compose.yml] root@dlp:~# docker-compose exec db /bin/bash Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg. root@7230fd252ef6:/# # stop application and also shutdown all containers root@dlp:~# docker-compose stop Stopping root_db_1 ... done Stopping root_web_1 ... done # start a service alone in application # if set dependency, other container starts root@dlp:~# docker-compose up -d web Starting root_web_1 ... doneroot@dlp:~# docker-compose ps Name Command State Ports ---------------------------------------------------------------------- root_db_1 docker-entrypoint.sh mariadbd Exit 0 :3306->3306/tcp root_web_1 /usr/sbin/nginx -g daemon off; Up () :80->80/tcp # remove all containers in application # if a container is running, it won't be removed root@dlp:~# docker-compose rm
Going to remove root_db_1
Are you sure? [yN] y
Removing root_db_1 ... done
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