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Observation¶

While looking in the logs on worker I found

Sep 08 01:34:22 worker33 systemd-sysctl[1737]: Couldn't write '1' to 'net/ipv4/conf/br1/forwarding', ignoring: No such file or directory
Sep 08 01:34:22 worker33 systemd-sysctl[1737]: Couldn't write '1' to 'net/ipv4/conf/eth0/forwarding', ignoring: No such file or directory

Could be an incomplete path that should start with / or a race condition if the according prerequisities during a boot are not yet fulfilled. This seems to be related to https://gitlab.suse.de/openqa/salt-states-openqa/-/blob/master/openqa/openvswitch.sls?ref_type=heads#L41 where we write to the forwarding sysctl parameters.

Acceptance criteria¶

• AC1: No error message like the above on all our salt controlled machines
• AC2: openQA jobs on the affected machines can still reach the internet

Suggestions¶

• Investigate the impact.
  • Maybe this affects multi-machine tests - which are currently limited
• Check dependencies between systemd-sysctl (which sets this attribute) and wicked (or whichever service creates br1)
• Lookup why this is a warning and not a failure of the service (or any service)
  • Read systemd-sysctl-related documentation