The never-yet-applied k3s_dns.yml placed 'import /etc/coredns/custom/*.server'
INSIDE the .:53 server block. *.server files hold full server blocks
(arcodange.lab:53 {…}), which only parse at Corefile root — inside a block
CoreDNS dies at startup with "Unknown directive 'arcodange.lab:53'"
(CrashLoopBackOff, cluster DNS fully down; lived it on 2026-07-24 while
restoring the expired *.arcodange.lab certificate).
Also restores the stock 'loadbalance' plugin dropped by the playbook.
Context: cluster CoreDNS forwarded to the node's resolv.conf, which lists the
ISP box's IPv6 RDNSS next to the Pi-holes — NXDOMAIN roulette for *.lab names.
That's what left step-issuer unable to reach ssl-ca.arcodange.lab:8443 and let
the 24h wildcard cert expire this morning. The (fixed) playbook pins .lab
resolution to the Pi-holes via the coredns-custom ConfigMap; applied live on
2026-07-24, wildcard renewed, strict TLS verified on gitea/argocd/grafana.
Co-Authored-By: Claude Fable 5 <[email protected]>
arcodangeandClaude Fable 5
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