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cache plugin: authoritative/non-authoritative flag confuses old(er) clients #2887

m4r10k opened this issue Jun 13, 2019 · 0 comments


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commented Jun 13, 2019

As described in #2588 (comment) and #2588 (comment) the cache plugin is currently confusing old(er) DNS clients or client implementations (Pyhton, Ruby, ...)

This happens because only the first answer from the DNS cache is provided as authoritative, all other ones (until the TTL is running out) are responded with non-authoritative.

@miekg has provided a PR which pins the answers given from the cache to authoritative.

PR: #2885
Kubernetes Issue trackback: kubernetes/kubeadm#1512

@miekg We have testet the PR in an own build on-premises and the old(er) clients can now work with the cached DNS records without any problem.

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