51bf38815c
Deleted the 6 NFS PVs orphaned by the Phase 2 rolling and removed their /srv/nfs/<dir> subtrees on the PVE host (~1.5 GB; vault-2 audit log was 1.4 GB on its own). Cluster-wide Released-PV sweep on the proxmox-lvm/encrypted side stays out of scope.
169 lines
7.8 KiB
Markdown
169 lines
7.8 KiB
Markdown
# NFS-Hostile Workload Migration — Plan
|
||
|
||
**Date**: 2026-04-25
|
||
**Design**: `2026-04-25-nfs-hostile-migration-design.md`
|
||
**Beads**: code-gy7h (Vault, epic), code-ahr7 (Immich PG)
|
||
|
||
## Phase 1 — Immich PG (DONE 2026-04-25)
|
||
|
||
| Step | Done |
|
||
|---|---|
|
||
| Snapshot extensions + row counts to `/tmp/immich-pre-migration-*` | ✓ |
|
||
| Quiesce `immich-server` + `immich-machine-learning` + `immich-frame` | ✓ |
|
||
| `pg_dumpall` → `/tmp/immich-pre-migration-<ts>.sql` (1.9 GB) | ✓ |
|
||
| Add `kubernetes_persistent_volume_claim.immich_postgresql_encrypted` (10Gi, autoresize 20Gi cap) | ✓ |
|
||
| Swap `claim_name` at `infra/stacks/immich/main.tf` deployment | ✓ |
|
||
| Patch init container to gate on `PG_VERSION` (chicken-and-egg fix) | ✓ |
|
||
| Force pod restart so override.conf gets written | ✓ |
|
||
| Restore dump | ✓ |
|
||
| `REINDEX clip_index`, `REINDEX face_index` | ✓ |
|
||
| Scale apps back up | ✓ |
|
||
| Verify: `\dx`, row counts (~111k assets), HTTP 200 internal/external | ✓ |
|
||
| LV present on PVE host (`vm-9999-pvc-...`) | ✓ |
|
||
|
||
### Phase 1 follow-ups (not blocking)
|
||
|
||
- Old NFS PVC `immich-postgresql-data-host` retained 7 days for
|
||
rollback. After 2026-05-02: remove `module.nfs_postgresql_host`
|
||
from `infra/stacks/immich/main.tf` and the CronJob's reference.
|
||
- Backup CronJob (`postgresql-backup`) still writes to the NFS
|
||
module. After cleanup, point it at a dedicated backup PVC or to
|
||
the existing `immich-backups` NFS share.
|
||
|
||
## Phase 2 — Vault Raft (DONE 2026-04-25)
|
||
|
||
**Phase 2 complete 2026-04-25; all 3 voters on `proxmox-lvm-encrypted`.**
|
||
|
||
### Pre-flight (T-0) — DONE 2026-04-25 15:50 UTC
|
||
|
||
- [x] Verify all 3 vault pods sealed=false, raft healthy.
|
||
- [x] Take fresh `vault operator raft snapshot save` (anchor saved at
|
||
`/tmp/vault-pre-migration-20260425-155029.snap`, 1.5 MB).
|
||
- [ ] Optional: scale ESO to 0 — skipped (auto-unseal sidecar is
|
||
independent; ESO refresh churn is non-disruptive for one swap).
|
||
- [x] Confirmed leader is **vault-2** → migrate vault-0 first
|
||
(non-leader), vault-1 next, vault-2 last (with step-down).
|
||
Plan originally assumed vault-0 was leader; same intent
|
||
(non-leader first).
|
||
- [x] Thin pool headroom: 54.63% used, plenty for 6 × 2 GiB LVs.
|
||
|
||
### Step 0 — Helm values + StatefulSet swap — DONE 2026-04-25 16:08 UTC
|
||
|
||
- [x] Edit `infra/stacks/vault/main.tf`: change
|
||
`dataStorage.storageClass` and `auditStorage.storageClass`
|
||
from `nfs-proxmox` → `proxmox-lvm-encrypted`.
|
||
- [x] `kubectl -n vault delete sts vault --cascade=orphan` (StatefulSet
|
||
`volumeClaimTemplates` is immutable; orphan keeps pods+PVCs
|
||
alive while we recreate the controller with the new template).
|
||
- [x] `tg apply -target=helm_release.vault` → recreates STS with new
|
||
VCT (full-stack `tg plan` blocks on unrelated for_each-with-
|
||
apply-time-keys errors at lines 848/865/909/917; targeted
|
||
apply on the helm release alone is the right scope here).
|
||
Existing pods still on old NFS PVCs.
|
||
|
||
### Step 1 — Roll vault-0 first (non-leader) — DONE 2026-04-25 16:18 UTC
|
||
|
||
- [x] `kubectl -n vault delete pod vault-0 --grace-period=30`
|
||
- [x] `kubectl -n vault delete pvc data-vault-0 audit-vault-0`
|
||
- [x] STS controller recreated pod; new PVCs auto-provisioned on
|
||
`proxmox-lvm-encrypted` (LVs `vm-9999-pvc-fb732fd7-...` data
|
||
4.12%, `vm-9999-pvc-36451f42-...` audit 3.99%).
|
||
- [x] **Hit and fixed**: vault-0 CrashLoopBackOff'd with
|
||
`permission denied` on `/vault/data/vault.db`. The helm chart's
|
||
`statefulSet.securityContext.pod` block in main.tf only set
|
||
`fsGroupChangePolicy`, replacing (not merging) the chart's
|
||
defaults `fsGroup=1000, runAsGroup=1000, runAsUser=100,
|
||
runAsNonRoot=true`. NFS exports made the missing fsGroup a
|
||
no-op; ext4 LV needs it to chown the volume root for the
|
||
vault user. Old vault-1/vault-2 pods were created before that
|
||
block was added so they still had the chart-default
|
||
securityContext from their original spec. Fix: provide all
|
||
five fields explicitly in main.tf and re-apply. Same root
|
||
cause will affect vault-1 and vault-2 swaps unless this stays
|
||
in place.
|
||
- [x] Wait Ready; auto-unseal sidecar unsealed; `retry_join` rejoined
|
||
raft cluster.
|
||
- [x] Verify: `vault operator raft list-peers` shows 3 voters,
|
||
vault-0 follower, leader=vault-2. External HTTPS 200.
|
||
|
||
### Step 2 — 24h soak (SKIPPED per user direction 2026-04-25)
|
||
|
||
User instructed "continue with all the remaining actions" — soak
|
||
gates compressed to per-pod settle windows + raft-state verification
|
||
between rollings. No Raft alarms, no Vault errors observed at each
|
||
verification gate.
|
||
|
||
### Step 3 — Roll vault-1 — DONE 2026-04-25
|
||
|
||
- [x] Force-finalize PVCs to break re-mount race:
|
||
`kubectl -n vault patch pvc data-vault-1 audit-vault-1 -p '{"metadata":{"finalizers":null}}' --type=merge`.
|
||
(Initial pod-then-PVC delete recreated pod on the OLD NFS PVCs
|
||
because pvc-protection finalizer hadn't cleared. Lesson learned
|
||
and applied to vault-2 below.)
|
||
- [x] Pod recreated on encrypted PVCs; auto-unsealed; rejoined raft.
|
||
|
||
### Step 4 — Settle window — DONE 2026-04-25
|
||
|
||
3-check verification over 90s; raft index advancing (2730010→2730012),
|
||
all 3 voters healthy.
|
||
|
||
### Step 5 — Roll vault-2 (leader) — DONE 2026-04-25
|
||
|
||
- [x] `vault operator step-down` on vault-2; vault-0 took leadership.
|
||
Confirmed vault-0 active, vault-1+vault-2 standby before delete.
|
||
- [x] Snapshot anchor at `/tmp/vault-pre-vault2.snap` (1.5 MB) from new
|
||
leader vault-0.
|
||
- [x] Force-finalize + delete PVCs + delete pod (lesson from vault-1).
|
||
- [x] Pod recreated on encrypted PVCs; auto-unsealed; rejoined raft.
|
||
- [x] `vault operator raft list-peers` shows 3 voters all healthy on
|
||
encrypted storage; leader vault-0.
|
||
|
||
### Step 6 — Cleanup — DONE 2026-04-25
|
||
|
||
- [x] `kubectl get pvc -A` cross-cluster shows zero PVCs on
|
||
`nfs-proxmox` SC (only Released PVs remain → Phase 3).
|
||
- [x] Removed inline `kubernetes_storage_class.nfs_proxmox` from
|
||
`infra/stacks/vault/main.tf` (was lines 29–42).
|
||
- [x] All 3 PVC pairs on `proxmox-lvm-encrypted`.
|
||
- [x] `vault operator raft autopilot state` healthy=true.
|
||
- [x] External `https://vault.viktorbarzin.me/v1/sys/health` = 200.
|
||
|
||
## Phase 3 — Released-PV cleanup (FOLLOW-UP)
|
||
|
||
### Step 3.1 — vault Released PVs — DONE 2026-04-25
|
||
|
||
6 vault NFS PVs (Released, `nfs-proxmox` SC, Retain policy) deleted
|
||
along with their NFS subdirectories on PVE host (~1.5 GB reclaimed):
|
||
|
||
| PV | Claim | Size on disk |
|
||
|---|---|---|
|
||
| pvc-004a5d3b-… | data-vault-2 | 45M |
|
||
| pvc-808a78ec-… | audit-vault-1 | 1.4M |
|
||
| pvc-918ee7c1-… | audit-vault-0 | 3.2M |
|
||
| pvc-9d2ddcb4-… | data-vault-0 | 46M |
|
||
| pvc-a659711d-… | data-vault-1 | 46M |
|
||
| pvc-d2e65109-… | audit-vault-2 | 1.4G |
|
||
|
||
Procedure: `kubectl delete pv <name>` (cluster object only — Retain
|
||
policy means CSI never touches NFS) then `rm -rf /srv/nfs/<dir>` on
|
||
192.168.1.127.
|
||
|
||
### Step 3.2 — Cluster-wide Released PV sweep (DEFERRED)
|
||
|
||
~50 other Released PVs persist across the cluster (~200 GiB on
|
||
`proxmox-lvm` and `proxmox-lvm-encrypted`). Out of scope for the
|
||
2026-04-25 NFS-hostile session per user direction. To reclaim:
|
||
|
||
1. List Released PVs, confirm LV exists on PVE.
|
||
2. `kubectl delete pv <name>` (CSI removes underlying LV when PV is
|
||
orphaned with `Retain` reclaim policy and no PVC reference).
|
||
3. If LV survives: manual `lvremove pve/vm-9999-pvc-<uuid>`.
|
||
|
||
## Rollback
|
||
|
||
| Phase | Trigger | Action |
|
||
|---|---|---|
|
||
| 1 | Immich UI broken / data loss | Revert `claim_name`; restore from `/tmp/immich-pre-migration-*.sql` to old NFS PVC |
|
||
| 2 (mid-rolling) | Single pod broken | Delete the encrypted PVC; recreate with NFS SC explicitly; cluster keeps quorum from 2 healthy pods |
|
||
| 2 (post-rolling, raft corrupt) | Cluster-wide failure | `vault operator raft snapshot restore <pre-migration.snap>` |
|
||
| Catastrophic | All Vault data lost | Restore from latest `/srv/nfs/vault-backup/` snapshot via CronJob output |
|