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23599da487
Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>. Parse cluster-cidr only if it is specified xref https://github.com/kubernetes/kubernetes/issues/53570#issuecomment-335943956 **What this PR does / why we need it**: In iptables/proxier.go, there is code to check the length of the CIDR and setup nat/iptables only if the length of the string is greater than zero. However in PR #49087, strong validation was added so kube proxy currently bails out and basically mandates a valid cidr has to be specified. Let us go back to the earlier behavior. **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes # **Special notes for your reviewer**: **Release note**: ```release-note NONE ``` |
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