Description of problem: Starting a container via the socket causes all socket calls to hang after that. This happens specifically with systemd 252-16 and podman 4.6.0-1 Version-Release number of selected component (if applicable): How reproducible: Steps to Reproduce: The environment is a CentOS Stream 9 VM (e.g. [qcow2](https://cloud.centos.org/centos/9-stream/x86_64/images/CentOS-Stream-GenericCloud-9-20220829.0.x86_64.qcow2)). On a non-root user. 1. Install specifically this version (the version 4.6.0-3 has other issue https://bugzilla.redhat.com/show_bug.cgi?id=2231975): `sudo dnf install podman-2:4.6.0-1.el9` 2. Ensure systemd 252-15 is the one installed: `sudo dnf install systemd-252-15.el9` 3. Enable socket `systemctl --user enable --now podman.socket` 4. Start nginx `podman --url unix://run/user/$(id -u)/podman/podman.sock run --name nginx-test -p 8080:80 -d docker.io/nginx` 5. List `podman --url unix://run/user/$(id -u)/podman/podman.sock ps`. Run it multiple times. They all work. 6. Remove test container: `podman container rm -f nginx-test` 7. Update systemd to 252-16: `sudo dnf install systemd-252-16.el9` 8. Reboot 9. Start nginx `podman --url unix://run/user/$(id -u)/podman/podman.sock run --name nginx-test -p 8080:80 -d docker.io/nginx` 10. List `podman --url unix://run/user/$(id -u)/podman/podman.sock ps`. This one hangs. Sometimes, the step 10 has to be run multiple times before it hangs for good. What I'm seeing is that the processes started in step 9 are included in the `podman.service` cgroup, and even though podman itself already exited, the `podman.service` appears as "active (running)", which seems to prevent systemd from starting podman to attend the subsequent socket requests. ``` podman.service - Podman API Service Loaded: loaded (/usr/lib/systemd/user/podman.service; disabled; preset: disabled) Active: active (running) since Mon 2023-08-14 18:03:31 EDT; 9min ago TriggeredBy: ● podman.socket Docs: man:podman-system-service(1) Process: 1516 ExecStart=/usr/bin/podman $LOGGING system service (code=exited, status=0/SUCCESS) Main PID: 1516 (code=exited, status=0/SUCCESS) Tasks: 13 (limit: 10774) Memory: 30.2M CPU: 75ms CGroup: /user.slice/user-1000.slice/user/app.slice/podman.service ├─1526 /usr/bin/slirp4netns --disable-host-loopback --mtu=65520 --enable-sandbox --enable-seccomp --enable-ipv6 -c -r 3 -e 4 --netns-type=path /run/user/1000/n> ├─1529 rootlessport └─1538 rootlessport-child ``` Actual results: It hangs when listing containers using the socket Expected results: It lists containers. Additional info: I submitted the ticket upstream as well: https://github.com/containers/podman/issues/19625
A podman developer believes this is a systemd issue, not a podman issue. I opened the issue in systemd upstream: https://github.com/systemd/systemd/issues/28843 The podman developer also thinks it is the same issue which was found in 253.5 as reported here: https://github.com/systemd/systemd/issues/27953, and fixed here: https://github.com/systemd/systemd/pull/28035
*** This bug has been marked as a duplicate of bug 2225667 ***
I confirm this is working now with systemd 252-17 in CentOS Stream 9. Thank you!