By default there are no Docker does not rotate logs of the containers. This might cause disk space issues when there is something that is intensively logging.

You can set a limit in the /etc/docker/daemon.json file. Afterwards restart docker

/etc/docker/daemon.json
{
  "log-driver": "json-file",
  "log-opts": {"max-size": "10m", "max-file": "3"}
}

Clearing logs manually

Running truncate -s 0 /var/lib/docker/containers/*/*-json.log will clear ALL logs.

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