Registry reachable in cluster#71
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Pods inside a bink cluster cannot resolve bink-managed DNS names like registry.cluster.local because CoreDNS's kubernetes plugin handles the cluster.local zone but only resolves Kubernetes services/pods/endpoints. After kubeadm deploys CoreDNS, patch the Corefile to change "fallthrough in-addr.arpa ip6.arpa" to just "fallthrough". This removes the zone restriction so all unresolved cluster.local queries (not just reverse DNS) fall through to the forward plugin, which reaches the bink dnsmasq container via the node's /etc/resolv.conf. Fixes: bootc-dev#70 Assisted-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Alice Frosi <afrosi@redhat.com>
Runs nslookup from the busybox pod to verify CoreDNS fallthrough resolves bink-managed DNS names inside the cluster. Assisted-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com> Signed-off-by: Alice Frosi <afrosi@redhat.com>
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@Johan-Liebert1 PTAL |
cgwalters
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Jun 24, 2026
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Enable CoreDNS fallthrough so that unresolved cluster.local queries (e.g. registry.cluster.local) are forwarded to the node's
/etc/resolv.conf, which reaches the bink DNS container. This allows pods to resolve bink-managed DNS names like the local registryFixes: #70