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developer: infrastructure: DRBD speedup trick

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used while re-imaging hetzner01 to be the secondary of hetzner04
This commit is contained in:
Earl Warren 2024-06-03 14:30:32 +02:00
parent cd1507419f
commit e400655e1c
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11
docs/developer/infrastructure.md
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@ -294,6 +294,13 @@ $ sudo drbdadm create-md r0
$ sudo drbdadm up r0
```
On hetzner02 (the primary), [pretend all is in sync](https://linbit.com/drbd-user-guide/drbd-guide-9_0-en/#s-skip-initial-resync) to save the initial bitmap sync since
there is actually no data at all.
```sh
sudo drbdadm new-current-uuid --clear-bitmap r0/0
```
The DRBD device is mounted on `/var/lib/lxc` in `/etc/fstab` there is a noauto line:
```
@ -333,9 +340,9 @@ lxc-helpers.sh lxc_install_lxc_inside 10.41.13 fc29
#### Root filesystem backups
- `hetzner01:/etc/cron.daily/backup-hetzner04`
`rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /srv --exclude /var/lib/lxc 10.53.100.4:/ /srv/backups/hetzner04/`
`rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /precious --exclude /srv --exclude /var/lib/lxc 10.53.100.4:/ /srv/backups/hetzner04/ >& /var/log/$(basename $0).log`
- `hetzner04:/etc/cron.daily/backup-hetzner01`
`rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /srv --exclude /var/lib/lxc 10.53.100.1:/ /srv/backups/hetzner01/`
`rsync -aHS --delete-excluded --delete --numeric-ids --exclude /proc --exclude /dev --exclude /sys --exclude /precious --exclude /srv --exclude /var/lib/lxc 10.53.100.1:/ /srv/backups/hetzner01/ >& /var/log/$(basename $0).log`
#### LXC containers