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kubelet: Incorrect fallback to hairpin-mode "hairpin-veth" #23322

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NikolayMurha opened this issue Mar 22, 2016 · 2 comments
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kubelet: Incorrect fallback to hairpin-mode "hairpin-veth" #23322

NikolayMurha opened this issue Mar 22, 2016 · 2 comments

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@NikolayMurha
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Hi guys. I have issue with connecting to PODs itself via service ip.
I determined that the problem with the wrong fallback to harpin-veth.

In kubelet output I have message:

W0322 09:27:09.399179   25899 kubelet.go:508] Hairpin mode set to "promiscuous-bridge" but configureCBR0 is false, falling back to "hairpin-veth"
I0322 09:27:09.399219   25899 kubelet.go:380] Hairpin mode set to "hairpin-veth"

But hairpin_mode for interfaces is 0:

cat /sys/devices/virtual/net/docker0/brif/veth*/hairpin_mode
0
0
0
0

If I set kubelet --hairpin-mod=hairpin-veth all is ok.

Kubelet output

I0322 09:29:08.234951   28239 kubelet.go:380] Hairpin mode set to "hairpin-veth"

and

cat /sys/devices/virtual/net/docker0/brif/veth*/hairpin_mode
1
1
1
1

I think problem is there
https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/kubelet.go#L408
Because used hairpinMode variable, but value was set above to klet.hairpinMode (https://github.com/kubernetes/kubernetes/blob/master/pkg/kubelet/kubelet.go#L378) .
@NikolayMurha
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Fix #23325

@bprashanth
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Closed via #23325
@MurgaNikolay thanks for the fix

@bprashanth bprashanth mentioned this issue Mar 30, 2016
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@antoineco antoineco mentioned this issue Apr 1, 2016
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@imriss imriss mentioned this issue Sep 25, 2017
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openshift-publish-robot pushed a commit to openshift/kubernetes that referenced this issue Jul 17, 2019
@k8s-publishing-bot
Merge pull request kubernetes#23322 from stlaz/cors_validate
f4f34eb 
APIServer CRD: add additionalCORSAllowedOrigins validation

Origin-commit: a96fda52bdf32fc6dcd366e9ff6c444f4d0965fc
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@NikolayMurha @bprashanth