Comment 3 for bug 1972664

For some context, for me this is happening about every minute. I suspect it's related to Docker somehow. I have a set of stable containers (not restarting, the same set of containers running for hours) and I see these recurring log messages around a bunch of other container-related messages. I'm having a hard time figuring out the beginning of the loop from the timestamps so here's a `/var/log/syslog` snippet of one cycle but I don't know if it starts at the right place:

```
...
Jan 29 15:21:33 localhost systemd[1]: run-docker-runtime\x2drunc-moby-c83a40b7d0f954c20d5f215e197c43c302a23fa1bcd5d815cd2af853e08dd640-runc.0ZIjFd.mount: Deactivated successfully.
Jan 29 15:21:33 localhost systemd[1]: run-docker-runtime\x2drunc-moby-417201f6d792614d1d95a3160989ca55fab185df0cf6aec34304173d09be9a73-runc.rIjQ0e.mount: Deactivated successfully.
Jan 29 15:21:58 localhost systemd[1]: run-docker-runtime\x2drunc-moby-417201f6d792614d1d95a3160989ca55fab185df0cf6aec34304173d09be9a73-runc.UUBKdH.mount: Deactivated successfully.
Jan 29 15:22:18 localhost systemd[1]: run-docker-runtime\x2drunc-moby-1dc5d8cb7c171e42a5a4c665d64cdb361ce5ce235eb57c3ed1877482b4bc5969-runc.lYaK7r.mount: Deactivated successfully.
Jan 29 15:22:18 localhost systemd[1]: run-docker-runtime\x2drunc-moby-068c7ed2f83c60236ccbcc3ce46740c8cc883941ca622248705d0d3621c5e6e0-runc.9Jjn0m.mount: Deactivated successfully.
Jan 29 15:22:18 localhost systemd[1]: run-docker-runtime\x2drunc-moby-417201f6d792614d1d95a3160989ca55fab185df0cf6aec34304173d09be9a73-runc.L0RQO3.mount: Deactivated successfully.
Jan 29 15:22:20 localhost systemd-networkd[159]: veth91c7a22: Link UP
Jan 29 15:22:20 localhost networkd-dispatcher[220]: WARNING:Unknown index 1330 seen, reloading interface list
Jan 29 15:22:20 localhost kernel: [20600.521624] br-e80ace13ece7: port 1(veth91c7a22) entered blocking state
Jan 29 15:22:20 localhost kernel: [20600.521627] br-e80ace13ece7: port 1(veth91c7a22) entered disabled state
Jan 29 15:22:20 localhost kernel: [20600.521742] device veth91c7a22 entered promiscuous mode
Jan 29 15:22:20 localhost kernel: [20600.521832] br-e80ace13ece7: port 1(veth91c7a22) entered blocking state
Jan 29 15:22:20 localhost kernel: [20600.521835] br-e80ace13ece7: port 1(veth91c7a22) entered forwarding state
Jan 29 15:22:20 localhost kernel: [20600.522086] br-e80ace13ece7: port 1(veth91c7a22) entered disabled state
Jan 29 15:22:20 localhost dockerd[1066]: time="2023-01-29T15:22:20.074954374-08:00" level=info msg="No non-localhost DNS nameservers are left in resolv.conf. Using default external servers: [nameserver 8.8.8.8 nameserver 8.8.4.4]"
Jan 29 15:22:20 localhost dockerd[1066]: time="2023-01-29T15:22:20.075007074-08:00" level=info msg="IPv6 enabled; Adding default IPv6 external servers: [nameserver 2001:4860:4860::8888 nameserver 2001:4860:4860::8844]"
Jan 29 15:22:20 localhost systemd-udevd[598489]: Using default interface naming scheme 'v249'.
Jan 29 15:22:20 localhost systemd-udevd[598487]: Using default interface naming scheme 'v249'.
Jan 29 15:22:20 localhost containerd[580]: time="2023-01-29T15:22:20.203356574-08:00" level=info msg="loading plugin \"io.containerd.event.v1.publisher\"..." runtime=io.containerd.runc.v2 type=io.containerd.event.v1
Jan 29 15:22:20 localhost containerd[580]: time="2023-01-29T15:22:20.203446574-08:00" level=info msg="loading plugin \"io.containerd.internal.v1.shutdown\"..." runtime=io.containerd.runc.v2 type=io.containerd.internal.v1
Jan 29 15:22:20 localhost containerd[580]: time="2023-01-29T15:22:20.203470174-08:00" level=info msg="loading plugin \"io.containerd.ttrpc.v1.task\"..." runtime=io.containerd.runc.v2 type=io.containerd.ttrpc.v1
Jan 29 15:22:20 localhost containerd[580]: time="2023-01-29T15:22:20.203708074-08:00" level=info msg="starting signal loop" namespace=moby path=/run/containerd/io.containerd.runtime.v2.task/moby/0e20276fd704ad4c35ecc26a97fdc007b8b6cbee4d5212bb5f6a69b0e60fad96 pid=598529 runtime=io.containerd.runc.v2
Jan 29 15:22:20 localhost kernel: [20601.074266] eth0: renamed from veth96904c5
Jan 29 15:22:20 localhost systemd-networkd[159]: veth91c7a22: Gained carrier
Jan 29 15:22:20 localhost systemd-networkd[159]: br-e80ace13ece7: Gained carrier
Jan 29 15:22:20 localhost kernel: [20601.144398] IPv6: ADDRCONF(NETDEV_CHANGE): veth91c7a22: link becomes ready
Jan 29 15:22:20 localhost kernel: [20601.144472] br-e80ace13ece7: port 1(veth91c7a22) entered blocking state
Jan 29 15:22:20 localhost kernel: [20601.144474] br-e80ace13ece7: port 1(veth91c7a22) entered forwarding state
Jan 29 15:22:21 localhost avahi-daemon[209]: Joining mDNS multicast group on interface veth91c7a22.IPv6 with address fe80::3c7c:d5ff:fe32:dab7.
Jan 29 15:22:21 localhost systemd-networkd[159]: veth91c7a22: Gained IPv6LL
Jan 29 15:22:21 localhost avahi-daemon[209]: New relevant interface veth91c7a22.IPv6 for mDNS.
Jan 29 15:22:21 localhost avahi-daemon[209]: Registering new address record for fe80::3c7c:d5ff:fe32:dab7 on veth91c7a22.*.
Jan 29 15:22:23 localhost containerd[580]: time="2023-01-29T15:22:23.419542784-08:00" level=info msg="shim disconnected" id=0e20276fd704ad4c35ecc26a97fdc007b8b6cbee4d5212bb5f6a69b0e60fad96
Jan 29 15:22:23 localhost dockerd[1066]: time="2023-01-29T15:22:23.419550184-08:00" level=info msg="ignoring event" container=0e20276fd704ad4c35ecc26a97fdc007b8b6cbee4d5212bb5f6a69b0e60fad96 module=libcontainerd namespace=moby topic=/tasks/delete type="*events.TaskDelete"
Jan 29 15:22:23 localhost containerd[580]: time="2023-01-29T15:22:23.419604884-08:00" level=warning msg="cleaning up after shim disconnected" id=0e20276fd704ad4c35ecc26a97fdc007b8b6cbee4d5212bb5f6a69b0e60fad96 namespace=moby
Jan 29 15:22:23 localhost containerd[580]: time="2023-01-29T15:22:23.419616184-08:00" level=info msg="cleaning up dead shim"
Jan 29 15:22:23 localhost containerd[580]: time="2023-01-29T15:22:23.425425784-08:00" level=warning msg="cleanup warnings time=\"2023-01-29T15:22:23-08:00\" level=info msg=\"starting signal loop\" namespace=moby pid=598652 runtime=io.containerd.runc.v2\n"
Jan 29 15:22:23 localhost systemd-networkd[159]: veth91c7a22: Lost carrier
Jan 29 15:22:23 localhost kernel: [20603.906101] br-e80ace13ece7: port 1(veth91c7a22) entered disabled state
Jan 29 15:22:23 localhost kernel: [20603.906313] veth96904c5: renamed from eth0
Jan 29 15:22:23 localhost networkd-dispatcher[220]: WARNING:Unknown index 1330 seen, reloading interface list
Jan 29 15:22:23 localhost systemd-udevd[598520]: Using default interface naming scheme 'v249'.
Jan 29 15:22:23 localhost avahi-daemon[209]: Interface veth91c7a22.IPv6 no longer relevant for mDNS.
Jan 29 15:22:23 localhost avahi-daemon[209]: Leaving mDNS multicast group on interface veth91c7a22.IPv6 with address fe80::3c7c:d5ff:fe32:dab7.
Jan 29 15:22:23 localhost systemd-networkd[159]: veth91c7a22: Link DOWN
Jan 29 15:22:23 localhost kernel: [20604.033020] br-e80ace13ece7: port 1(veth91c7a22) entered disabled state
Jan 29 15:22:23 localhost kernel: [20604.034029] device veth91c7a22 left promiscuous mode
Jan 29 15:22:23 localhost kernel: [20604.034031] br-e80ace13ece7: port 1(veth91c7a22) entered disabled state
Jan 29 15:22:23 localhost avahi-daemon[209]: Withdrawing address record for fe80::3c7c:d5ff:fe32:dab7 on veth91c7a22.
Jan 29 15:22:23 localhost networkd-dispatcher[220]: ERROR:Unknown interface index 1330 seen even after reload
Jan 29 15:22:23 localhost networkd-dispatcher[220]: WARNING:Unknown index 1330 seen, reloading interface list
Jan 29 15:22:23 localhost networkd-dispatcher[220]: ERROR:Unknown interface index 1330 seen even after reload
Jan 29 15:22:23 localhost networkd-dispatcher[220]: WARNING:Unknown index 1330 seen, reloading interface list
Jan 29 15:22:23 localhost networkd-dispatcher[220]: ERROR:Unknown interface index 1330 seen even after reload
Jan 29 15:22:23 localhost networkd-dispatcher[220]: WARNING:Unknown index 1330 seen, reloading interface list
Jan 29 15:22:23 localhost networkd-dispatcher[220]: ERROR:Unknown interface index 1330 seen even after reload
Jan 29 15:22:23 localhost systemd[1]: run-docker-netns-36aea95122a1.mount: Deactivated successfully.
Jan 29 15:22:23 localhost systemd[1]: var-lib-docker-overlay2-1aaab31906b187d7ecfe24f3a4ce7912be2057d0a41c8c0c1c798e1dad634360-merged.mount: Deactivated successfully.
Jan 29 15:22:24 localhost systemd-networkd[159]: br-e80ace13ece7: Lost carrier
...
```