DRBD
From Bashlinux
How to setup DRBD with separated resource and meta-disk
On both servers
- Create 2 separate partitions on each server, one for meta and one for data. Some meta-disk size approximations:
Block device size | DRBD meta data |
---|---|
1 GB | 2 MB |
100 GB | 4+1 MB |
500 GB | 16+2 MB |
1 TB | 32+2 MB |
2 TB | 64+1 MB |
4 TB | 128 MB |
- If the meta-disk and resource partition are both listed on /etc/fstab, then remove them from there
- Install drbd
# apt-get -y install drbd8-utils
- Edit drbd.conf to something similar to:
global { usage-count no; } common { syncer { rate 100M; } } resource srv { protocol C; startup { wfc-timeout 15; degr-wfc-timeout 60; } net { cram-hmac-alg sha1; shared-secret "B1ng0!"; } on SERVER-01p { device /dev/drbd0; disk /dev/md4; address IP_SERVER-01p:7788; meta-disk /dev/md3[0]; } on SERVER-01s { device /dev/drbd0; disk /dev/md4; address IP_SERVER-01s:7788; meta-disk /dev/md3[0]; } }
- Create resource and meta-disk
# drbdadm create-md srv
- Start DRBD
# service drbd start
On primary server only
When finish the previous setup on both servers
- Tell DRBD which one is the