Docker Compose defines and runs multi-container applications from YAML. It focuses on orchestrating multiple containers on one node, simplifying complex command lines; with Podman’s compatible REST API, docker-compose can launch rootless or rootful Podman containers. section 9.4 section 1.5
A Podman-backed Compose workflow involves:
- Install docker-compose, start the user Podman socket, verify its ping endpoint, and set DOCKER_HOST to the Unix socket. section 9.4
- Define services, images, bind mounts, named volumes, and port mappings in docker-compose.yaml. section 9.4
- Run docker-compose up to pull and create containers, then inspect them and their volumes with Podman commands. section 9.4
- Use docker-compose down to remove the application container and its default network. section 9.4
A single-service Compose definition
A service can use quay.io/rhatdan/myimage:latest, mount ./html at /var/www/html, attach a named volume at /vol, and publish port 8080 to container port 80. section 9.4
cat > docker-compose.yaml << _EOF
version: "3.7"
services:
myapp:
image: quay.io/rhatdan/myimage:latest
volumes:
- ./html:/var/www/html
- myapp_vol:/vol
ports:
- 8080:80
volumes:
myapp_vol: {}
_EOF
Inspect the complete Compose YAML used to launch a service through the Podman socket. section 9.4
