Difference in naming of generated volumes between podman-compose and podlet

[rugk]

I have a compose file like this (trimmed down for only relevant parts):

# based ob https://github.com/orangecoding/fredy/blob/7ebd73c9cf209b57f667cd168f8d18c3e2e1001c/docker-compose.yml
services:
  fredy:
    image: ghcr.io/orangecoding/fredy 
    # map existing config and database
    volumes:
      - db:/db

volumes:
  db:

Save this in a directory named fredy.(IIRC this is relevant for the default project name of docker compose files/projects.)

Now running this with podman-compose up vs podlet shows some differences:

• podman-compose creates a container named fredy_fredy_1 and creates fredy_db as a volume
• podlet (and podman/systemd/podman-systemd-generator etc. aka the whole pipeline) on the other hand creates a container named systemd-fredy and creates db as a volume name

Issues

I don't really care about the container name, but the volume name being different means both access different data. This is unfortunate, as it means it makes switching from one to another harder. Also, I have not tested Docker to see what name it uses but I guess docker-compose is more correct here, if I read the Docker doc correctly.

Also, as you can see below podlet also does not make it set some default labels (which may be fine for me, just saw that differs too).

Details

§ podman volume ls
DRIVER      VOLUME NAME
local       fredy_db
local       db
$ podman volume inspect fredy_db
[
     {
          "Name": "fredy_db",
          "Driver": "local",
          "Mountpoint": "***/.local/share/containers/storage/volumes/fredy_db/_data",
          "CreatedAt": "2025-09-28T22:57:51.693068236+02:00",
          "Labels": {
               "com.docker.compose.project": "fredy",
               "io.podman.compose.project": "fredy"
          },
          "Scope": "local",
          "Options": {},
          "MountCount": 0,
          "NeedsCopyUp": true,
          "LockNumber": 1
     }
]
$ podman volume inspect db
[
     {
          "Name": "db",
          "Driver": "local",
          "Mountpoint": "***/.local/share/containers/storage/volumes/db/_data",
          "CreatedAt": "2025-09-29T00:49:50.523592031+02:00",
          "Labels": {},
          "Scope": "local",
          "Options": {},
          "MountCount": 0,
          "NeedsCopyUp": true,
          "LockNumber": 2
     }
]

Additional ideas

A workaround by using some more keys to override the name unfortunately also is not supported, see #158

System

$ podman-compose --version
podman-compose version 1.4.1
podman version 5.6.0
$ podlet --version
podlet 0.2.4
$ podman --version
podman version 5.6.0
$ /usr/lib/systemd/system-generators/podman-system-generator --version
5.6.0