I created 2 containers. One is postgres 9.6 and another - pgadmin4. And after restart system some warnings appeared in konsole as reply to each docker commad. Such as
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docker ps
And I see:
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WARN[0000] The cgroupv2 manager is set to systemd but there is no systemd user session available
WARN[0000] For using systemd, you may need to login using an user session
WARN[0000] Alternatively, you can enable lingering with: `loginctl enable-linger 1000` (possibly as root)
WARN[0000] Falling back to --cgroup-manager=cgroupfs
WARN[0000] The cgroupv2 manager is set to systemd but there is no systemd user session available
WARN[0000] For using systemd, you may need to login using an user session
WARN[0000] Alternatively, you can enable lingering with: `loginctl enable-linger 1000` (possibly as root)
WARN[0000] Falling back to --cgroup-manager=cgroupfs
WARN[0000] Failed to add conmon to cgroupfs sandbox cgroup: error creating cgroup path /libpod_parent/conmon: open /sys/fs/cgroup/cgroup.subtree_control: permission denied
Ok.. May be I just should not pay attention.. But each
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docker exec ...
fails with the same list of warnings + this one:
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WARN[0000] Error resizing exec session 029c2627e70296ff3ea282ddc9f3dbbe1c7456b054eea30856850fe01418a57a: could not open ctl file for terminal resize for container fdd57bbf20b28d488307e981b9b2c31279a0c9aa5b5e62a77236906fa8276e2e: open /home/<my_user_name>/.local/share/containers/storage/vfs-containers/fdd57bbf20b28d488307e981b9b2c31279a0c9aa5b5e62a77236906fa8276e2e/userdata/029c2627e70296ff3ea282ddc9f3dbbe1c7456b054eea30856850fe01418a57a/ctl: no such device or address
And now I am disappointed. What all this stuff around cgroupv2 is about? And what should I do from this point? Search for some other alternative to podman/docker? Hack my Mageia 8 installation with some cgroupv2_repair scripts? Switch back to Mageia 7?