initial git commit saving configs

backup.md

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+
+## 3️⃣ Create the backup script on the master node
+
+Create /usr/local/bin/backup-storage.sh:
+
+sudo nano /usr/local/bin/backup-storage.sh
+
+```
+#!/bin/bash
+set -e
+
+SRC="/storage/"
+DEST="debian@192.168.1.30:/backup/master-storage/"
+SSH_KEY="/home/adrien/.ssh/id_backup"
+LOG="/var/log/storage-backup.log"
+
+echo "=== Backup started at $(date) ===" >> $LOG
+
+rsync -aHAX --numeric-ids --delete \
+  --link-dest=/backup/master-storage/latest \
+  -e "ssh -i $SSH_KEY" \
+  "$SRC" "$DEST/$(date +%F)/" >> $LOG 2>&1
+
+ssh -i $SSH_KEY debian@192.168.1.30 \
+  "ln -sfn /backup/master-storage/$(date +%F) /backup/master-storage/latest"
+
+echo "=== Backup finished at $(date) ===" >> $LOG
+```
+
+### What this gives you
+
+Daily folders (2025-01-14/)
+
+A latest symlink
+
+Efficient incremental backups
+
+Clean deletions mirrored (--delete)
+
+```
+sudo crontab -e
+
+0 2 * * * /usr/local/bin/backup-storage.sh
+
+```
+
+
+### 5️⃣ Verify backups on vm-nfs
+ls -lah /backup/master-storage
+
+You should see:
+
+2025-01-14/
+latest -> 2025-01-14
+
+
+## 6️⃣ Restore (very important)
+
+To restore everything:
+
+rsync -aHAX /backup/master-storage/latest/ /storage/
+
+
+To restore a single folder:
+
+rsync -aHAX /backup/master-storage/2025-01-10/prometheus/ /storage/prometheus/