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GetForwardedIps issues on RHEL7

See original GitHub issue

When GetForwardedIps runs _RunIpRoute (effective command: ip route ls table local type local scope host dev eth0 proto 66), the result is 0 or more lines. If there is one or more forwarded ips, they are returned one per line but have "local " prepended to them. This causes ParseForwardedIps to fail.

That may not be the case on other systems, but a simple solution works for all of them. Before returning from GetForwardedIps, simply do a search & replace: result = re.sub(r'local\s((\d{1,3}\.){3}\d{1,3}(/\d{1,2})?)\s?\n', r'\1\n',result)

then return as normal. If there is a "local " tag, it gets removed, if not, nothing changes. This helped me stop thousands of warnings from filling up /var/log/messages with: google-ip-forwarding: WARNING Could not parse IP address: “local”.

Issue Analytics

State:
Created 5 years ago
Comments:8 (2 by maintainers)

Top GitHub Comments

2reactions

brendan-riuscommented, Jul 15, 2019

I have the same error message in the syslog of one of my GKE nodes running 1.13.7-gke.8, which I think is cos-u-73-11647-182-0 according to https://cloud.google.com/kubernetes-engine/docs/release-notes

Just to be sure, is this error just polluting syslogs, or can it also cause networking problems? I have noticed some timeouts on my cluster when trying to connect to my redis broker. Is it possible it might be related?

0reactions

homelessnessbocommented, Dec 9, 2019

@brendan-rius have you discovered the reason of your timeouts back then and is it correlated with this log pollution?