Warnings in logfile

LXC
1

I use a non privileged, pure (non lxd) LXC-Container on Ubuntu 20.04 at an Raspberry PI 4.

As I can see, it is full functional, but I have some warnings in logfile. I am concerned about the security.

WARN     cgfsng - cgroups/cgfsng.c:fchowmodat:1452 - No such file or directory - Failed to fchownat(16, memory.oom.group, 65535, 0, AT_EMPTY_PATH | AT_SYMLINK_
NOFOLLOW )
WARN     start - start.c:lxc_spawn:1742 - Operation not permitted - Failed to allocate new network namespace id

I don’t screwed in cgroups and namespaces configuration.
I have enabled the cgroups memory controller, but this changes nothing.

Is this a severe impairment or ignorable?
Can somebody help me to get a deeper inside that happens to get this warnings?

Greetings
mszet

2

@brauner is this anything to worry about? Thanks

3

I don’t think so, may just be liblxc being a bit too verbose on logging when run as unprivileged user.

4

Nope, that’s totally fine. Just means that memory cgroup2 doesn’t support that file. :slight_smile: