CoreDNS 1.14.3 returns REFUSED for all zones that use
'file /data/zone reload 30s' — the reload timer defers the
initial zone load, causing the plugin to return REFUSED until
the timer fires. The timer never resolves this correctly.
Zone updates are already triggered by SIGUSR1 sent from
_reload_dns_service() after every zone file write, which
causes CoreDNS to reinitialise all plugins and re-read zone
files. No periodic zone polling is needed.
Also update config/dns/Corefile to remove the stale reload 30s.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
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