Docker flooding syslog with run-docker-runtime logs

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I've google this, but so far no way to fix it. My syslog under /var/log is being flooded every second with messages like this;

Aug 27 20:58:27 mail-server systemd[1]: run-docker-runtime\x2drunc-moby-e4bfb13118b141bf232cf981fe9b535706243c47ae0659466b8e6667bd4feceb-runc.YHoxmJ.mount: Succeeded.
Aug 27 20:58:27 mail-server systemd[1083]: run-docker-runtime\x2drunc-moby-e4bfb13118b141bf232cf981fe9b535706243c47ae0659466b8e6667bd4feceb-runc.YHoxmJ.mount: Succeeded.
Aug 27 20:58:27 mail-server systemd[8395]: run-docker-runtime\x2drunc-moby-e4bfb13118b141bf232cf981fe9b535706243c47ae0659466b8e6667bd4feceb-runc.YHoxmJ.mount: Succeeded.
Aug 27 20:58:28 mail-server systemd[1]: run-docker-runtime\x2drunc-moby-5dc4f4e0b3cbd5e5bfbcc88b8d22f92575706b7c3603847ccb2fd4e56f188f99-runc.gt51Ek.mount: Succeeded.
Aug 27 20:58:28 mail-server systemd[1083]: run-docker-runtime\x2drunc-moby-5dc4f4e0b3cbd5e5bfbcc88b8d22f92575706b7c3603847ccb2fd4e56f188f99-runc.gt51Ek.mount: Succeeded.
Aug 27 20:58:28 mail-server systemd[8395]: run-docker-runtime\x2drunc-moby-5dc4f4e0b3cbd5e5bfbcc88b8d22f92575706b7c3603847ccb2fd4e56f188f99-runc.gt51Ek.mount: Succeeded.

I am running Ubuntu 20.04 and dockerd is run by systemd.

Could anyone help me to find the cause if this? It seems that every single container is generating this.

Best,

Francis

docker
1 Answers

Those messages are from systemd itself about the mount. This is addressed in systemd v249; see https://github.com/systemd/systemd/issues/6432 for more information.

In a nutshell, that version of systemd allows controlling of that mount via its unit file using the following:

[Mount]
LogLevelMax=0

The LogLevelMax setting applies not just to the unit but also to systemd's log messages itself about the unit. That is the change introduced in v249.

user_15617790
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