feat(vault): 3-node raft HA on single-replica storage (JDWLABS-25) [DRAFT — window-gated]#10
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feat(vault): 3-node raft HA on single-replica storage (JDWLABS-25) [DRAFT — window-gated]#10jdwillmsen wants to merge 1 commit into
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Removes Vault as a single point of failure. On 2026-06-06 a Longhorn instance-manager fault sealed the single standalone Vault, taking down the cluster ClusterSecretStore. - New longhorn-single StorageClass (1 replica, best-effort, Retain): raft replicates across pods at the app layer, so one Longhorn fault takes at most one Vault node and quorum (2/3) survives. - vault values: ha.raft enabled, 3 replicas, host anti-affinity, retry_join for follower auto-join, data on longhorn-single. - unseal cron: unseal all three pods by name (the service VIP only reaches one, leaving followers sealed). Verified: helm template (chart 0.30.1) renders a 3-replica StatefulSet with the raft config, longhorn-single PVCs, host anti-affinity, and an auto-managed PodDisruptionBudget; SC and CronJob pass --dry-run=server; all files parse as valid YAML. DO NOT MERGE until the maintenance window: applying this re-inits Vault (wipes current data). Follow the JDWLABS-25 cutover runbook (pre-flight seed-value check, phase 3 init, phase 4 re-seed). Closes JDWLABS-25. Closes JDWLABS-30 (Vault PDB auto-managed by chart). Refs JDWLABS-22. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Merging triggers ArgoCD to redeploy Vault as 3-node raft, which re-inits Vault and wipes current data. Execute only via the JDWLABS-25 cutover runbook (pre-flight seed-value check → phase 3 init → phase 4 re-seed). Design + runbook live on JDWLABS-25.
Summary
Removes Vault as a single point of failure. On 2026-06-06 a Longhorn instance-manager fault sealed the single standalone Vault, downing the cluster
ClusterSecretStore. Part of epic JDWLABS-22.Closes JDWLABS-25, JDWLABS-30 (Vault PDB is auto-managed by the chart in HA mode).
Changes
longhorn-singleStorageClass — 1 replica, best-effort, Retain. Raft replicates across the 3 pods, so one Longhorn fault takes at most one Vault node; quorum (2/3) survives. This is the SPOF removal.vault/values.yaml—ha.raftenabled, 3 replicas, host anti-affinity,retry_join(follower auto-join), data onlonghorn-single.vault-unseal-cronjob.yaml— unseal all 3 pods by DNS name (the VIP only reaches one, leaving followers sealed).Verification (pre-merge, non-destructive)
helm template(chart 0.30.1): renders 3-replica StatefulSet, raft config w/ 3 retry_join,longhorn-singlePVCs, host anti-affinity, auto PDBplatform-vault.kubectl apply --dry-run=serveron SC + CronJob.raft list-peers=3; kill-one-pod keeps secrets served; ExternalSecrets re-sync.Cutover runbook
On JDWLABS-25. Pre-flight: confirm all seed values on hand (porkbun, grafana, longhorn, alertmanager, usersrole, argocd-dex, per-tenant github-app/ai-keys/discord) — re-init wipes current secrets.
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