Public bug reported:
Dear maintainer,
I believe that "docker-compose-v2" should not have "docker.io" as a hard
dependency, as it can be used along with other packages that provide a
Docker-compatible API, such as "podman".
Aside from the disk space use, requiring "docker.io" is also inconvenient
because:
* The Docker daemon is enabled by default as a systemd service.
* It makes it impossible to install "podman-docker" and "docker-compose-v2
simultaneously, even though they are a sensible combination.
The "docker-compose" package (v1) does not suffer from this issue as it
declares "docker.io" as a recommended dependency. I suggest doing the
same, or at least having "docker-compose-v2" require either "docker.io"
or "podman".
Below is an example showing how "docker-compose-v2" can be used with
"podman" without "docker.io" on Ubuntu 24.04.1:
```
# apt install -y podman
# apt download docker-compose-v2
# dpkg -i --ignore-depends=docker.io docker-compose-v2*.deb
# mkdir my-project && cd my-project
# cat <<EOF > docker-compose.yml
services:
netcat:
image: busybox
command: nc -lk -p 12345 -e echo 'It works!'
ports: ["12345:12345"]
EOF
# podman compose up -d
>>>> Executing external compose provider
>>>> "/usr/libexec/docker/cli-plugins/docker-compose". Please refer to the
>>>> documentation for details. <<<<
[...]
# nc localhost 12345
It works!
```
System and package details:
```
# lsb_release -rd
No LSB modules are available.
Description: Ubuntu 24.04.1 LTS
Release: 24.04
# apt-cache policy docker-compose-v2
docker-compose-v2:
Installed: 2.24.6+ds1-0ubuntu2
Candidate: 2.24.6+ds1-0ubuntu2
Version table:
*** 2.24.6+ds1-0ubuntu2 500
500 http://es.archive.ubuntu.com/ubuntu noble/universe amd64 Packages
100 /var/lib/dpkg/status
```
Regards.
** Affects: docker-compose-v2 (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2079929
Title:
docker.io should not be a hard dependency of docker-compose-v2
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