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doc: instance leg to S3 shelved; ks2 push is the interim off-site leg

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Decided 2026-08-28: instances are protected by replication (sdb now,
nuc after FTTH, ks2 push in between), their data/DBs/configs by
restic-data — a third copy of instance filesystems in S3 was not
worth the moving parts. backup-strategy.md now explains the
replication-vs-backup split and the rebuild path when no replica
survives; restic-backup.md §6 is marked SHELVED (script and empty
repo kept).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
This commit is contained in:
Julien Lutran
2026-08-28 16:17:11 +02:00
co-authored by Claude Fable 5
parent 7d5d1d9b6b
commit b5aef914f5
5 changed files with 81 additions and 54 deletions
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ks2/plan.md
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@@ -17,10 +17,10 @@ What remains on the box is **cold history**: instance replicas on pool
`/backup/ns3061243` on pool `backup` (last refreshed 2026-08-28),
snapshotted daily there (`zfs-auto-snapshot.sh`, 2-month expiry).
⚠️ Consequence while the nuc leg waits for FTTH: **instances have no
fresh off-site copy** — only the ks4-local sdb replicas plus ks2's
ageing ones. Either re-enable the interim push (below) or accept the
gap knowingly until FTTH.
⚠️ While the nuc leg waits for FTTH, instances have no *fresh*
off-site copy — the ks2 push is to be re-enabled as soon as the
initial restic sync finishes (decided 2026-08-28), and retired again
when nuc takes over.
## Inventory findings (2026-08-22)
@@ -50,9 +50,9 @@ gap knowingly until FTTH.
|---|---|---|
| local, 2nd disk | `incus-copy.sh -p backup -s backup` → sdb5 pool | **live** (01:00) |
| off-site, S3 (data+DB) | **restic** → bucket `restic-data` ([restic-backup.md](../ks4/restic-backup.md)) | **live** (05:00) |
| off-site, S3 (instances) | restic over `incus file mount` of the `backup`-project replicas | written, **not seeded** |
| off-site, S3 (instances) | restic over `incus file mount` of the `backup`-project replicas | **shelved** 2026-08-28 (replication covers instances) |
| off-site, nuc | nuc pulls `ks4:*` → pool `ks4backup` over WG ([nuc-seed.md](nuc-seed.md)) | waiting FTTH (< Sep 30) |
| off-site, ks2 (optional interim) | `incus-copy.sh -d ks2 -m push` at 02:00 until the nuc leg seeds | **not enabled** — decide |
| off-site, ks2 (interim) | `incus-copy.sh -d ks2 -m push` at 02:00 until the nuc leg seeds | to re-enable once the restic seed finishes |
## Actions (backup work documented in [`../ks4/`](../ks4/), ks2-only tasks here)
@@ -64,8 +64,9 @@ gap knowingly until FTTH.
3. ~~plakar S3 leg~~ → **replaced by restic**
([restic-backup.md](../ks4/restic-backup.md), live 2026-08-28;
plakar's own doc kept as history)
4. instance leg — restic over `incus file mount`
([restic-backup.md](../ks4/restic-backup.md) §6): **seed pending**
4. ~~instance leg to S3~~ — **shelved 2026-08-28**: instances are
protected by replication (sdb + nuc/ks2), their data and configs by
`restic-data`
5. [nuc-seed.md](nuc-seed.md) — **prepared**; after FTTH: seed nuc
pull leg, verify all instances, test-restore one
6. [decommission.md](decommission.md) — **prepared**; cut flows,