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Scooby HuskyandClaude Sonnet 5
c6d4294be6
home's own authentik pods reach ha-authentik-postgres via the CoreDNS rewrite on port 61432 (not just external traffic via NodePort on 5432/ 61432) - discovered live that Istio ambient's port-level mTLS/L4 authorization enforcement is keyed on the port actually dialed (61432 here), not just the pod's real containerPort (5432) traffic eventually reaches after Service translation. The existing port-5432-only rules (from the streaming-replication fix) didn't cover this in-cluster path, surfacing as 'server closed the connection unexpectedly' from home's own authentik-worker pod. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
52 lines
2.6 KiB
YAML
52 lines
2.6 KiB
YAML
# Multi-site active failover pilot (see
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# /home/scooby/.claude/plans/jiggly-snacking-iverson.md) - CNPG streaming
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# replication from the VPS was silently failing: `pg_stat_wal_receiver` on
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# the VPS replica showed 0 rows, and its logs showed a repeating
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# "could not connect to the primary server: ... server closed the
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# connection unexpectedly" every few minutes (confirmed live 2026-08-19).
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#
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# Root cause: the `authentik` namespace is enrolled in Istio's ambient mesh
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# (`istio.io/dataplane-mode: ambient`) and the mesh-wide default
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# PeerAuthentication (istio-system/default) is STRICT - ztunnel requires a
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# valid mesh (HBONE/SPIFHE) identity for ALL traffic to pods in this
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# namespace, including traffic arriving via the ha-authentik-postgres
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# NodePort from the VPS/witness (which have no mesh identity at all -
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# they're not in this cluster). ztunnel accepts the raw TCP connection then
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# resets it once it can't complete an mTLS handshake it never receives -
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# exactly matching the "server closed the connection unexpectedly"
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# symptom. Confirmed via `openssl s_client -starttls postgres`: TCP
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# connects, the postgres SSLRequest byte is sent, 0 bytes come back.
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#
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# Same root cause and same fix as the existing precedent for this exact
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# problem (infrastructure/istio/manifests/mesh/peer-authentication-webhooks.yaml
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# - CrowdSec's hostNetwork bouncer / the API server's webhook calls): allow
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# PERMISSIVE (mTLS or plaintext) inbound. Scoped here to just the CNPG
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# primary pod's port 5432 via portLevelMtls, rather than the whole
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# namespace like that precedent does - Authentik's own in-mesh east-west
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# traffic (server/worker -> everything else) should stay STRICT.
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apiVersion: security.istio.io/v1
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kind: PeerAuthentication
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metadata:
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name: allow-ha-postgres-replication
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namespace: authentik
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spec:
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selector:
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matchLabels:
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cnpg.io/cluster: pg-authentik
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mtls:
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mode: STRICT
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portLevelMtls:
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"5432":
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mode: PERMISSIVE
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# Multi-site active failover pilot, floating hostname (see
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# infrastructure/authentik/manifests/ha-postgres-nodeport.yaml): the
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# ha-authentik-postgres Service also listens on 61432 (-> targetPort
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# 5432, same pods) so home's own pods can reach it via the
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# pg-authentik.ha.huskypup.net CoreDNS rewrite on the same port the
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# app tier is configured with externally. Needed its own PERMISSIVE
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# entry - confirmed live 2026-08-20 that ambient's port-level mTLS
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# enforcement is keyed on the port actually dialed (61432), not just
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# the pod's real containerPort (5432) it eventually reaches.
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"61432":
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mode: PERMISSIVE
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