10 — Operations

Day-2 concerns. Backups, monitoring, troubleshooting.

Backups

Tiering (3-2-1, full design in 12 #37):

Source — UNAS RAID 6 + native UniFi Drive snapshots (12 #38, still to enable).
Warm tier — s3.nuclide.systems (on-site), restic/borg via Backrest (LXC 103).
Cold tier off-site — encrypted rclone copy to a third-party (Jottacloud is the user's candidate; decision tracked in Q20). Always encrypt before upload — provider sees only ciphertext.

Nexa-specific items inside this pipeline:

What	How	Frequency
n8n workflow JSON	`nexa-core/scripts/backup_workflows.sh` → git push	hourly cron in n8n container
Qdrant `nexa_knowledge_text` (and `_visual` once Phase 3.2)	`POST /collections/<name>/snapshots` → write to `backup/nexa/snapshots/qdrant/<date>/` on UNAS, then Backrest picks it up for warm + cold	daily (snapshot), weekly (cold tier)
GraphDB `nexa_knowledge` (Phase 3.4+)	scheduled SPARQL `CONSTRUCT` export → `backup/nexa/snapshots/graphdb/<date>.ttl.gz`	daily
Memos DB	Backrest snapshot of Memos data dir	already covered
Nextcloud	Nextcloud's own backup app + Backrest of `services/nextcloud/`	already covered
`runtime_config` (Qdrant `_config` namespace)	Qdrant snapshot covers it	n/a

Monitoring

Signal	Source	Sink
Container up/down	Dozzle (`192.168.1.40:3553`) + docker healthchecks. *Skip names matching `octoprint`** — that container is intentionally powered down most of the time.	Memos system feed via ntfy
n8n workflow failures	n8n built-in failure-webhook	ntfy → `nexa.system` topic
Proxmox / disk / memory alerts	Proxmox notification target → ntfy	ntfy → Memos digest
LiteLLM rate-limit	LiteLLM logs / cost-tracking	Memos morning digest
Backrest run status	Backrest webhook	ntfy

A single ntfy topic nexa.system is the convention; n8n has one workflow that re-broadcasts it as a Memos comment under a pinned [SYSTEM] memo.

Troubleshooting

Memos webhook not firing

# is the Memos webhook config still pointing at n8n?
curl -s -H "Authorization: Bearer $MEMOS_API_KEY" \
  https://memos.nuclide.systems/api/v1/workspace/setting | jq '.webhooks'

# does n8n still expose the path?
curl -i https://n8n.nuclide.systems/webhook/memos     # expect 200/405, never 404

If 404 → workflow is inactive in n8n. Activate.

LiteLLM 401 / 429

401 → the Nexa virtual key was rotated. Reissue, update .env, re-create the n8n credential.
429 → set per-key TPM/RPM limits in LiteLLM admin; classification calls are tiny (<300 tok), embeddings are the bulk.

Qdrant `nexa_knowledge` empty

# is the indexing workflow active?
docker logs nexa-n8n 2>&1 | grep memos_bridge | tail

# manual index test
curl -X POST https://memos.nuclide.systems/api/v1/memos \
  -H "Authorization: Bearer $MEMOS_API_KEY" \
  -d '{"content":"manual probe #nexa"}'

# point count
curl -s -H "api-key: $QDRANT_API_KEY" \
  $QDRANT_HOST/collections/nexa_knowledge | jq '.result.points_count'

Wrong list routing (Work vs Personal)

Run #nexa:route-test <text> and check the confidence value.
If <0.7 the router defaults to Personal (by design — see 06).
Tune the system prompt in nexa-core/ai-prompts/system_prime.txt; commit the change.

"Where did Nexa store this?"

# state dump
curl -X POST https://memos.nuclide.systems/api/v1/memos \
  -d '{"content":"#nexa:export-state"}'
# returns runtime_config + counters as a JSON memo

Log locations

Component	Where
Memos	`docker logs nexa-memos` (LXC 104)
n8n	`docker logs nexa-n8n`
LiteLLM	`docker logs litellm`
Qdrant	`docker logs qdrant_scientific`
Zoraxy	LXC 108 web UI → Statistical Analysis
Backrest	LXC 103 web UI

For a one-shot dump:

ssh nuc 'docker compose -p nexa logs --tail 500' > /tmp/nexa.log

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