Docker : Use Docker Compose2026/05/08 |
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To Install Docker Compose, it's easy to configure and run multiple containers as a Docker application. |
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| [1] | Install Docker Compose. |
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root@dlp:~#
root@dlp:~# apt -y install docker-compose-v2 ln -s /usr/libexec/docker/cli-plugins/docker-compose docker-compose root@dlp:~# docker-compose --version Docker Compose version 2.40.3+ds1-0ubuntu1 |
| [2] | For example, Configure an application that has Web and DB services with Docker Compose. |
FROM ubuntu LABEL Maintainer="ServerWorld <admin@srv.world>" ENV ubuntu_FRONTEND=noninteractive RUN apt-get update RUN apt-get -y install tzdata RUN apt-get -y install apache2 EXPOSE 80 CMD ["/usr/sbin/apachectl", "-D", "FOREGROUND"]
services:
db:
image: docker.io/library/mariadb
volumes:
- /var/lib/docker/disk01:/var/lib/mysql
environment:
MYSQL_ROOT_PASSWORD: password
MYSQL_USER: ubuntu
MYSQL_PASSWORD: password
MYSQL_DATABASE: ubuntu_db
user: 0:0
privileged: true
ports:
- "3306:3306"
web:
build: .
ports:
- "80:80"
volumes:
- /var/lib/docker/disk02:/var/www/html
privileged: true
# build and run root@dlp:~# docker-compose up -d [+] Running 11/11 ✓ db Pulled 7.5s ✓ 4f12367291a4 Pull complete 0.6s ✓ d5c8079c2cfb Pull complete 0.8s ✓ b40150c1c271 Pull complete 1.9s ✓ 70e28d1970b2 Pull complete 0.8s ✓ be8de6e97fbd Pull complete 0.8s ✓ 9728cf7b6840 Pull complete 4.4s ✓ 79b59e88f775 Pull complete 2.0s ✓ 3a08fbfd5bee Pull complete 0.8s ✓ 7cc06ba3b186 Download complete 0.0s ✓ 8955ebb9cc1f Download complete 0.1s [+] Building 23.2s (10/10) FINISHED => [internal] load local bake definitions 0.0s => => reading from stdin 445B 0.0s => [internal] load build definition from Dockerfile 0.0s => => transferring dockerfile: 276B 0.0s => [internal] load metadata for docker.io/library/ubuntu:latest 0.0s => [internal] load .dockerignore 0.0s => => transferring context: 2B 0.0s => CACHED [1/4] FROM docker.io/library/ubuntu:latest@sha256:f3d28607ddd78734bb7f71f117f3c6706c666b8b76cbff7c9ff6e5718d46 0.0s => => resolve docker.io/library/ubuntu:latest@sha256:f3d28607ddd78734bb7f71f117f3c6706c666b8b76cbff7c9ff6e5718d46ff64 0.0s => [2/4] RUN apt-get update 5.0s => [3/4] RUN apt-get -y install tzdata 2.9s => [4/4] RUN apt-get -y install apache2 11.2s => exporting to image 3.8s => => exporting layers 2.9s => => exporting manifest sha256:ce7277ffef46dee06d20e68bd2fe4470f72f0e88ffabbb1bc9a68d4bb8cb9e7e 0.0s => => exporting config sha256:1194f8c0f821463e992202c0b5ddaf331f7acb52eae1c93ca223b37a10aa2ea2 0.0s => => exporting attestation manifest sha256:655cc7d1ab5a6fb445aebad15853ff32fbf9b7f7a25355b671a28146b31752c7 0.0s => => exporting manifest list sha256:094ea18e9ca05b8c4ed2176f49276e10234fc3fc169b6bac649fd49742f92272 0.0s => => naming to docker.io/library/root-web:latest 0.0s => => unpacking to docker.io/library/root-web:latest 0.8s => resolving provenance for metadata file 0.0s [+] Running 4/4 ✓ root-web Built 0.0s ✓ Network root_default Created 0.0s ✓ Container root-web-1 Started 0.3s ✓ Container root-db-1 Startedroot@dlp:~# docker ps CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES 69aa06551219 mariadb "docker-entrypoint.s…" 50 seconds ago Up 50 seconds 0.0.0.0:3306->3306/tcp, [::]:3306->3306/tcp root-db-1 df272a9c8a6c root-web "/usr/sbin/apachectl…" 50 seconds ago Up 50 seconds 0.0.0.0:80->80/tcp, [::]:80->80/tcp root-web-1 # verify accesses root@dlp:~# mariadb -h 127.0.0.1 -u root -p -e "show variables like 'hostname';" Enter password: +---------------+--------------+ | Variable_name | Value | +---------------+--------------+ | hostname | 69aa06551219 | +---------------+--------------+root@dlp:~# mariadb -h 127.0.0.1 -u ubuntu -p -e "show databases;" Enter password: +--------------------+ | Database | +--------------------+ | information_schema | | ubuntu_db | +--------------------+root@dlp:~# echo "Hello Docker Compose World" > /var/lib/docker/disk02/index.html root@dlp:~# curl 127.0.0.1 Hello Docker Compose World |
| [3] | Other basic operations of Docker Compose are follows. |
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# verify state of containers root@dlp:~# docker-compose ps NAME IMAGE COMMAND SERVICE CREATED STATUS PORTS root-db-1 docker.io/library/mariadb "docker-entrypoint.s…" db 2 minutes ago Up 2 minutes 0.0.0.0:3306->3306/tcp, [::]:3306->3306/tcp root-web-1 root-web "/usr/sbin/apachectl…" web 2 minutes ago Up 2 minutes 0.0.0.0:80->80/tcp, [::]:80->80/tcp # show logs of containers root@dlp:~# docker-compose logs web-1 | AH00558: apache2: Could not reliably determine the server's fully qualified domain name, using 172.18.0.3. Set the 'ServerName' directive globally to suppress this message db-1 | 2026-05-08 00:37:38+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:12.2.2+maria~ubu2404 started. db-1 | 2026-05-08 00:37:39+00:00 [Note] [Entrypoint]: Switching to dedicated user 'mysql' db-1 | 2026-05-08 00:37:39+00:00 [Note] [Entrypoint]: Entrypoint script for MariaDB Server 1:12.2.2+maria~ubu2404 started. db-1 | 2026-05-08 00:37:39+00:00 [Note] [Entrypoint]: Initializing database files db-1 | 2026-05-08 00:37:40+00:00 [Note] [Entrypoint]: Database files initialized db-1 | 2026-05-08 00:37:40+00:00 [Note] [Entrypoint]: Starting temporary server db-1 | 2026-05-08 00:37:40+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
root@69aa06551219:/# exit
# stop application and also shutdown all containers root@dlp:~# docker-compose stop [+] Stopping 2/2 ✓ Container root-db-1 Stopped 0.3s ✓ Container root-web-1 Stopped 10.2s # 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 0.2sroot@dlp:~# docker-compose ps NAME IMAGE COMMAND SERVICE CREATED STATUS PORTS root-web-1 root-web "/usr/sbin/apachectl…" web 6 minutes ago Up 8 seconds 0.0.0.0:80->80/tcp, [::]: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 Yes
[+] Removing 1/0e root-db-1 (y/N) y
✓ Container root-db-1 Removed 0.0s
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