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141aa462fa
Automatic merge from submit-queue (batch tested with PRs 53604, 53751). 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>. Add no-negcache flag to kube-dns **What this PR does / why we need it**: Adds the [`--no-negcache`](https://linux.die.net/man/8/dnsmasq) flag to prevent dnsmasq from caching negative (NXDOMAIN) responses. More details on why this is desirable [here](https://github.com/kubernetes/dns/issues/121). **Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes kubernetes/dns#121 **Special notes for your reviewer**: Thanks to @rsmitty (https://rsmitty.github.io/KubeDNS-Tweaks/) and @coresolve (https://github.com/kubernetes/dns/issues/121#issuecomment-334045196) for pointing us in the right direction. **Release note**: ```release-note Add --no-negcache flag to kube-dns to prevent caching of NXDOMAIN responses. ```