Add Backups page: gitea and dbs cron, Zabbix monitoring

Backups.md

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+# Backups
+
+Daily backups run from **root's crontab** (`sudo crontab -e`).
+
+## Gitea
+
+See [[Gitea#Backup]] for details.
+
+```
+0 3 * * * /home/alvis/agap_git/gitea/backup.sh >> /mnt/backups/gitea/cron.log 2>&1
+```
+
+Output: `/mnt/backups/gitea/gitea-dump-*.zip`
+
+## DBS (databases)
+
+Rsync of all databases from SSD to backup volume.
+
+```
+30 3 * * * rsync -a --delete /mnt/ssd/dbs/ /mnt/backups/dbs/ >> /mnt/backups/dbs/cron.log 2>&1 && touch /mnt/backups/dbs/.last_sync
+```
+
+Source: `/mnt/ssd/dbs/` (gitea, otter, pihole, qdrant, zabbix)
+Destination: `/mnt/backups/dbs/`
+
+## Zabbix Monitoring
+
+Both backups are monitored via Zabbix agent on host `AgapHost`.
+
+| Item key | Description | Trigger |
+|----------|-------------|---------|
+| `gitea.backup.status` | `1` if last dump succeeded | — |
+| `gitea.backup.age` | Seconds since last dump zip | High if > 25h |
+| `dbs.backup.age` | Seconds since last rsync (`.last_sync` mtime) | High if > 25h |
+
+Agent config: `/etc/zabbix/zabbix_agent2.d/gitea_backup.conf`

Home.md

@@ -4,6 +4,7 @@
 
 - [[Network]] — Netplan, Caddy, port forwarding
 - [[Storage]] — LVM setup
+- [[Backups]] — Gitea and database backups
 
 ## Services