Drbd

Install

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apt-get install drbd8-utils
	
modprobe drbd

Conf

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root@server1:~# cat /etc/drbd.conf 
# You can find an example in  /usr/share/doc/drbd.../drbd.conf.example
	
include "drbd.d/global_common.conf";
include "drbd.d/*.res";

global_common.conf # on comprend rien 

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root@server1:/etc/drbd.d# cat  disk1.res 
resource disk1 {
        protocol C;
        device /dev/drbd1 minor 1;
        disk /dev/system/opt;
        meta-disk internal;

        on server1 {
                address XX.XX.XX.01:7801;
                disk /dev/sda4;
        }
        on server2 {
                address XX.XX.XX.02:7801;
                disk /dev/sda4;
        }
}

Utilisation

On initialise le disque 

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root@server1:/# /sbin/drbdadm create-md disk1
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root@server2:/# /sbin/drbdadm create-md disk1

Start du service 

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root@server1:/# /etc/init.d/drbd start
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root@server2:/# /etc/init.d/drbd start

Sur le primaire

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root@server1:/# /sbin/drbdadm -- --overwrite-data-of-peer primary disk1

Tips

Penser à bien configurer ntp, que les serveurs soient à la même heure.

Check l’état

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root@server1:/# cat /proc/drbd

Troubleshooting

Désynchro ?

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root@server2:~# drbdadm secondary disk1
root@server2:~# drbdadm disconnect disk1
root@server2:~# drbdadm -- --discard-my-data connect disk1
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root@server1:~# drbdadm primary disk1
root@server1:~# drbdadm connect disk1