Description of problem:
The startup script for ovnkube-master container starts ovn-nbctl daemon that logs to ovn-nbctl.log file[1]. However, apart from tailing it, nothing is done with that file. Concretely, it is never rotated.
Recently, one 4.8 cluster has hit the situation where this file grew up to ~24GB size. It was necessary to manually remove that file and restart ovnkube-master.
Version-Release number of selected component (if applicable):
4.8. It seems that 4.10 can hit this problem as well[2] but latest master branch has changed so much that I am not sure if it will be possible for this to happen in 4.11.
How reproducible:
Always (but may take very long and requires no ovnkube-master container restart)
Steps to Reproduce:
1. Let /run/ovn/ovn-nbctl.log grow for long enough
Actual results:
File growing without control
Expected results:
Log file to be eventually rotated.
References:
[1] - https://github.com/openshift/cluster-network-operator/blob/release-4.8/bindata/network/ovn-kubernetes/ovnkube-master.yaml#L813
[2] - https://github.com/openshift/cluster-network-operator/blob/release-4.10/bindata/network/ovn-kubernetes/ovnkube-master.yaml#L750

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