I'm wondering if could be possible run DRBD in such scenario:
- n single disk nodes
- one nas equipped with n+1 disks
- all the disks have the same dimensions and geometry
so that in a 3-1 deployment (3 nodes and one nas with 4 disks) the
drbd.conf files could be the following
*node1 /etc/drbd.conf:
global { usage-count yes; }
common { syncer { rate 10M; } }
resource rA {
protocol C;
meta-disk internal;
on node1 {
address 10.0.0.1:7789;
device /dev/drbd0
disk /dev/sda;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd0
disk /dev/sdb;
}
}
*node2 /etc/drbd.conf:
global { usage-count yes; }
common { syncer { rate 10M; } }
resource rB {
protocol C;
meta-disk internal;
on node2 {
address 10.0.0.2:7789;
device /dev/drbd0
disk /dev/sda;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd1
disk /dev/sdc;
}
}
*node3 /etc/drbd.conf:
global { usage-count yes; }
common { syncer { rate 10M; } }
resource rC {
protocol C;
meta-disk internal;
on node3 {
address 10.0.0.3:7789;
device /dev/drbd0
disk /dev/sda;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd2
disk /dev/sdd;
}
}
*nas /etc/drbd.conf:
global { usage-count yes; }
common { syncer { rate 10M; } }
resource rA {
protocol C;
meta-disk internal;
on node1 {
address 10.0.0.1:7789;
device /dev/drbd0
disk /dev/sda;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd0
disk /dev/sdb;
}
}
resource rB {
protocol C;
meta-disk internal;
on node2 {
address 10.0.0.2:7789;
device /dev/drbd0
disk /dev/sdc;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd1
disk /dev/sdd;
}
}
resource rC {
protocol C;
meta-disk internal;
on node3 {
address 10.0.0.3:7789;
device /dev/drbd0
disk /dev/sda;
}
on nas {
address 10.0.0.10:7789;
device /dev/drbd2
disk /dev/sdc;
}
}
The single resources rA rB and rC are respectively defined in the
nodes node1, node2 and node3 and are grouped inside the drbd.conf of
the nas.
Is that correct?
Antonio
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