http://vadkerti.net/tags/coredns/ Recent content in Coredns on thrix's blog Hugo -- 0.152.2 en-us Tue, 30 Jun 2026 00:00:00 +0000 http://vadkerti.net/posts/dns-negative-caching-broke-our-ephemeral-ci/ Tue, 30 Jun 2026 00:00:00 +0000 http://vadkerti.net/posts/dns-negative-caching-broke-our-ephemeral-ci/ A flaky CI failure where a freshly-created DNS record was unresolvable from inside the cluster, but resolved fine from my laptop a few minutes later. The culprit was negative DNS caching, driven by the zone’s SOA, poisoning lookups for our ephemeral per-job records.