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Julien LutranandClaude Fable 5 d7ec780747 doc: plakar out of the current architecture, kept as reference

backup-strategy.md now leads with the three target legs (local incus
push to sdb, nuc pull over WireGuard, restic to S3 for DBs and
selected trees) and carries the plakar/ks2 story in a closing History
section. restic-backup.md, install.md, local-backup-cron.md and the
ks2 docs describe the predecessor only as 'the first S3
implementation', with one operational note that plakar is still
installed for issue #2338 reproduction.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

2026-08-28 16:20:20 +02:00

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ks2 decommission — final checklist

Status: prepared — execute only when every gate in plan.md is ticked. Rental ends Sep 30, 2026; leave a few days of margin.

Preconditions (the plan's release gates)

restic S3 leg running nightly for ≥ a week, done (rc=0), restore test passed (restic-backup.md §7)
nuc pull leg seeded and one instance test-restored (nuc-seed.md)
local leg (sdb5) cron green in /var/log/incus-copy.log

1. Cut the last flows to ks2 (root on ks4)

crontab -e   # remove any remaining ks2 line (the 02:00 push, if it was
             # re-enabled; the 04:00 incus-backup.sh line is long gone)
incus remote list                 # if a "ks2" remote is still defined:
incus remote remove ks2
# drop the rsyncbackup SSH key if it exists only for ks2:
ls /root/.ssh/id_rsyncbackup* && rm -i /root/.ssh/id_rsyncbackup*

2. Last look at ks2 before wiping (root on ks2)

# anything in the rsync tree newer than the S3 cutover?
find /backup/ns3061243 -newermt '2026-08-23' | head
# pre-2023 dirs (catc, mythoughts, qcm, scripts): instances still
# exist stopped on ks4 — spot-check nothing unique remains:
ls /backup/ns3061243/{catc,mythoughts,qcm,scripts}

Archive anything unique into the restic dump dir on ks4 (/backup/dumps) — it then rides the nightly S3 snapshot for free.

3. Wipe and terminate

# on ks2 — destroy the data (both pools hold copies of personal data):
zpool destroy backup && zpool destroy data
# optional: shred the OS disks via OVH rescue mode / reinstall

Then in the OVH manager: cancel the ks2 (Kimsufi) server before the renewal date.

4. Post-mortem cleanup

Update doc/README.md: remove ks2 from the ks4 durability bullet and the index line for ks2/s "being decommissioned" wording (keep the folder as history)
Retire scripts/incus-backup.sh + incus-backup.db in the repo (superseded by restic-backup.sh) — keep for reference, note the retirement in their headers
login container cleanup: its native postgres still holds the pre-migration outline database (live Outline uses the dockerised outline-postgres-1) — dropdb outline and remove the native postgres package
Mark the ks2 line in plan.md done, date it

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