Podman : Use Docker Compose2025/04/25

	To Install Docker Compose, it's easy to configure and run multiple containers as a Docker application.
[1]	Install Podman-docker, refer to here.
[2]	Install Docker Compose.

[root@dlp ~]#

dnf -y install docker-compose

[3]	For example, Configure an application that has Web and DB services with Docker Compose.

# start podman.socket

[root@dlp ~]#

systemctl start podman.socket

# define Web service container

[root@dlp ~]#

vi Dockerfile

FROM fedora
MAINTAINER ServerWorld <admin@srv.world>

RUN dnf -y install nginx

EXPOSE 80
CMD ["/usr/sbin/nginx", "-g", "daemon off;"]

# define application configuration

[root@dlp ~]#

vi docker-compose.yml

services:
  db:
    image: docker.io/library/mariadb
    volumes:
      - /var/lib/containers/disk01:/var/lib/mysql
    environment:
      MYSQL_ROOT_PASSWORD: password
      MYSQL_USER: fedora
      MYSQL_PASSWORD: password
      MYSQL_DATABASE: fedora_db
    user: 0:0
    privileged: true
    ports:
      - "3306:3306"
  web:
    build: .
    ports:
      - "80:80"
    volumes:
      - /var/lib/containers/disk02:/usr/share/nginx/html
    privileged: true

# buid and run

[root@dlp ~]#

docker-compose up -d

Emulate Docker CLI using podman. Create /etc/containers/nodocker to quiet msg.
>>>> Executing external compose provider "/usr/libexec/docker/cli-plugins/docker-compose". Please see podman-compose(1) for how to disable this message. <<<<

[+] Running 10/10

.....
.....

 ✓ Service web           Built             17.5s
 ✓ web                   Built              0.0s
 ✓ Network root_default  Created            0.0s
 ✓ Container root-db-1   Started            0.2s
 ✓ Container root-web-1  Started

[root@dlp ~]#

podman ps

CONTAINER ID  IMAGE                              COMMAND               CREATED             STATUS             PORTS                   NAMES
e6353c10718a  docker.io/library/mariadb:latest   mariadbd              About a minute ago  Up About a minute  0.0.0.0:3306->3306/tcp  root-db-1
335faaa85bc1  docker.io/library/root-web:latest  /usr/sbin/nginx -...  About a minute ago  Up About a minute  0.0.0.0:80->80/tcp      root-web-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      | e6353c10718a |
+---------------+--------------+

[root@dlp ~]#

mysql -h 127.0.0.1 -u fedora -p -e "show databases;"

Enter password:
+--------------------+
| Database           |
+--------------------+
| fedora_db          |
| information_schema |
+--------------------+

[root@dlp ~]#

echo "Hello Docker Compose World" > /var/lib/containers/disk02/index.html

[root@dlp ~]#

curl 127.0.0.1

Hello Docker Compose World

[4]	Other basic operations of Docker Compose are follows.

# verify state of containers

[root@dlp ~]#

docker-compose ps

NAME         IMAGE                               COMMAND                  SERVICE   CREATED         STATUS         PORTS
root-db-1    docker.io/library/mariadb:latest    "mariadbd"               db        3 minutes ago   Up 3 minutes   3306/tcp
root-web-1   docker.io/library/root-web:latest   "/usr/sbin/nginx -g …"   web       3 minutes ago   Up 3 minutes   80/tcp

# show logs of containers

[root@dlp ~]#

docker-compose logs

db-1  | 2025-04-25 05:33:04+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:11.7.2+maria~ubu2404 started.
db-1  | 2025-04-25 05:33:04+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql'
db-1  | 2025-04-25 05:33:04+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:11.7.2+maria~ubu2404 started.
db-1  | 2025-04-25 05:33:05+00:00 [Note] [Entrypoint]: Initializing database files
db-1  | 2025-04-25 05:33:06+00:00 [Note] [Entrypoint]: Database files initialized
db-1  | 2025-04-25 05:33:06+00:00 [Note] [Entrypoint]: Starting temporary server
db-1  | 2025-04-25 05:33:06+00:00 [Note] [Entrypoint]: Waiting for server startup
.....
.....

# 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@e6353c10718a:/# exit

# stop application and also shutdown all containers

[root@dlp ~]#

docker-compose stop

[+] Stopping 1/2
 ✓ Container root-web-1  Stopped                                           0.2s
   Container root-db-1   Stopping                                          0.2s
[+] Stopping 2/2eth1 (unregistering): left allmulticast mode
 ✓ Container root-web-1  Stopped                                           0.2s
 ✓ Container root-db-1   Stopped

# start a service alone in application
# if set dependency, other container starts

[root@dlp ~]#

docker-compose up -d web

[+] Running 1/1
 ✓ Container root-web-1  Started                                           0.1s

[root@dlp ~]#

docker-compose ps

NAME         IMAGE                               COMMAND                  SERVICE   CREATED         STATUS         PORTS
root-web-1   docker.io/library/root-web:latest   "/usr/sbin/nginx -g …"   web       6 minutes ago   Up 4 seconds   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 Yes
[+] Removing 1/0e root-db-1 (y/N) y
 ✓ Container root-db-1  Removed                                            0.0s

Matched Content