Files
Homelabv4/infrastructure/coredns/manifests/coredns-configmap.yaml
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Scooby HuskyandClaude Sonnet 5 04fa80ece3 GitLab cross-site replication Phase 1a: Postgres network plumbing
Per the approved plan (jiggly-snacking-iverson.md, 'GitLab True
Cross-Site Replication' section) - replacing the git-mirror CronJob
with real CNPG streaming replication for pg-gitlab and pg-praefect,
reusing the exact pattern already proven for pg-authentik.

This commit is network plumbing only, no DB replication yet:
- Repoint both CNPG clusters' barmanObjectStore backup target from
  in-cluster gitlab-minio-svc to VPS MinIO (also becomes the initial
  seed source for the VPS's replicas in Phase 1c).
- New ha-gitlab-postgres/ha-praefect-postgres NodePort Services
  (bypass CNPG's own -rw Services) on both home and VPS.
- New PeerAuthentication with portLevelMtls PERMISSIVE on the replication
  ports - ambient mesh STRICT default would otherwise reset the
  VPS/witness's connection before the Postgres TLS handshake starts.
- Extended allow-gitlab-access AuthorizationPolicy with a port-scoped
  rule for the same traffic (no source.namespaces rule can match
  external, non-mesh peers).
- CoreDNS rewrites for pg-gitlab.ha.huskypup.net / pg-praefect.ha.huskypup.net
  so home's own pods reach the floating hostname locally instead of
  round-tripping through the WAN forward (no NAT hairpin support).

Still needed before Phase 1b/1c: UniFi WAN port-forwards for external
ports 61442/61443 -> talos-cp-01:32442/32443, source-restricted to the
VPS + witness public IPs (manual, same as the existing 61432 rule).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
2026-08-22 12:47:03 -05:00

86 lines
3.9 KiB
YAML

# Brings kube-system/coredns's Corefile under GitOps management. It was
# previously only ever edited live via kubectl (3 existing rewrite rules
# for auth/rancher/netbird.kube.huskypup.net, none of them git-tracked
# anywhere in this repo) - every future change meant a manual,
# classifier-gated live edit to a cluster-wide DNS config instead of a
# normal git commit ArgoCD applies on its own. No Talos/kubeadm
# ownerReferences on this ConfigMap or the coredns Deployment (confirmed
# live 2026-08-20), so it's safe to take over here.
#
# No pod restart needed after a sync - the Corefile's own `reload` plugin
# (already present below) watches the mounted file and hot-reloads within
# ~30-60s of the ConfigMap volume actually updating on disk (kubelet
# propagates ConfigMap changes to mounted volumes automatically, typically
# within ~60-90s).
apiVersion: v1
kind: ConfigMap
metadata:
name: coredns
namespace: kube-system
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
log . {
class error
}
prometheus :9153
# Rewrite auth.kube.huskypup.net to ingress gateway (NOT authentik-server directly)
# This ensures HTTPS works because the ingress gateway has the wildcard TLS cert.
# The old rewrite to authentik-server caused TLS failures for OIDC token exchange.
rewrite name auth.kube.huskypup.net istio-ingressgateway.istio-system.svc.cluster.local
# Rewrite rancher.kube.huskypup.net to internal Istio ingress gateway
rewrite name rancher.kube.huskypup.net istio-ingressgateway.istio-system.svc.cluster.local
# Rewrite netbird.kube.huskypup.net to internal Istio ingress gateway
rewrite name netbird.kube.huskypup.net istio-ingressgateway.istio-system.svc.cluster.local
# Multi-site active failover pilot (see
# /home/scooby/.claude/plans/jiggly-snacking-iverson.md): home's
# own pods resolving the floating pg-authentik.ha.huskypup.net
# record always go straight to a local service instead of
# round-tripping out through the UniFi WAN port-forward and back
# in - this UniFi doesn't support NAT hairpin/loopback for its
# own forwarded ports (confirmed live 2026-08-20: DNS resolved
# fine, TCP connect failed). Points at ha-authentik-postgres, NOT
# CNPG's own pg-authentik-rw directly - rewrite only changes the
# resolved name, not the port a client then connects to, and the
# app tier is configured for port 61432 (matching the external
# floating hostname) - pg-authentik-rw only listens on 5432,
# ha-authentik-postgres additionally listens on 61432 (see
# infrastructure/authentik/manifests/ha-postgres-nodeport.yaml)
# specifically so this rewrite target actually has that port.
rewrite name pg-authentik.ha.huskypup.net ha-authentik-postgres.authentik.svc.cluster.local
# GitLab cross-site replication (see
# /home/scooby/.claude/plans/jiggly-snacking-iverson.md) - same
# reasoning as pg-authentik.ha.huskypup.net above: home's own pods
# go straight to the local NodePort Service instead of round-
# tripping out through the UniFi WAN forward and back in (no NAT
# hairpin support, confirmed live for the authentik precedent).
rewrite name pg-gitlab.ha.huskypup.net ha-gitlab-postgres.gitlab.svc.cluster.local
rewrite name pg-praefect.ha.huskypup.net ha-praefect-postgres.gitlab.svc.cluster.local
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
fallthrough in-addr.arpa ip6.arpa
ttl 30
}
forward . 1.1.1.1 8.8.8.8 {
max_concurrent 1000
}
cache 30 {
disable success cluster.local
disable denial cluster.local
}
loop
reload
loadbalance
}