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Update backup_restore.md #321

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8 changes: 6 additions & 2 deletions docs/datastore/backup_restore.md
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Expand Up @@ -52,9 +52,13 @@ rke2 server \
systemctl start rke2-server
```

4. Remove the rke2 db directory on the other server nodes as follows:
4. Move the rke2 db directory on the other server nodes as follows (you want to keep a copy to avoid ending up with only an old or corrupt backup to chose for):
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Having the old DB dir around on the secondary servers doesn't really help with anything. If you run into problems, restoring a snapshot is a better resolution than moving an old db dir back into place.

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The issue is that we currently run rm -rf /var/lib/rancher/rke2/server/db/, which deletes both the etcd data and the snapshots directory. This means we erase the live data along with its backups.

We've encountered cases where customers, not paying close attention, have accidentally executed this command on all three master/etcd nodes, leading to complete data loss.

This change ensures that snapshots are not deleted until the cluster has been fully restored, allowing customers to perform the cleanup on their own afterward.

```
rm -rf /var/lib/rancher/rke2/server/db
mv /var/lib/rancher/rke2/server/db /var/lib/rancher/rke2/server/backups
```
Clean them out after this operation:
```
rm -rf /var/lib/rancher/rke2/server/backups
```

5. Start the rke2-server service on other server nodes with the following command:
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