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feat(dns): add GATEWAY_VIP cluster-var for split-horizon target (R-DNS-03)

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Parameterize the in-cluster split-horizon target as GATEWAY_VIP (R-ENV-02): base
default = dev L2-announced Gateway VIP (10.73.0.240, first IP of the Cilium LB pool).
coredns-custom answers *.home.keithjackson.dev with ${GATEWAY_VIP} so the unified graph
holds across dev/prod via cluster-vars only. Prod overlay carries a TODO to set the prod
LAN VIP alongside the prod L2 pool range when hardware is built.

Co-Authored-By: Claude Opus 4.8 <[email protected]>
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jakman85andClaude Opus 4.8 committed 2026-08-24 22:28:37 -05:00
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commit bba67d03ce
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clusters/prod/kustomization.yaml
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@@ -45,3 +45,7 @@ patches:
path: /data/VELERO_RETENTION
value: "720h"
# TODO(WS-INFRA, Phase 7): pin prod node placement once the bare-metal role labels exist.
# TODO(WS-NET, Phase 7): set GATEWAY_VIP to the prod LAN ingress VIP (add a `replace` op here)
# at the same time the prod Cilium LB IP pool range is supplied — the split-horizon
# coredns-custom (platform/coredns) answers *.home.keithjackson.dev with ${GATEWAY_VIP}, so
# the prod value must match the prod pool's Gateway address. Base default is the dev VIP.