[DRBD-user] Same configuration across 3-node cluster

[Andrew McGill]

Hello all,

Inspired by the logical layout of drbd.conf, I tried to set up a three-way 
replication -- A-B, B-C, C-A -- drbd82-8.2.6-1.el5.centos.  This is possible, 
but it does not seem possible to duplicate drbd.conf to all hosts.  Adding a 
resource section to drbd.conf on a host that does not present that resource 
gets you this error:

[root at black ~]# drbdadm up all
/etc/drbd.conf:582: in resource fnorbfoo, on fnorb { ... } ... on foo { ... }:
        There are multiple host sections for the peer.
        Maybe misspelled local host name 'black'?
/etc/drbd.conf:582: in resource fnorbfoo, there is no host section for this 
host.
        Missing 'on black {...}' ?

This error occurs even when trying to bring up other resources that are 
present for the host.  It looks like things work quite nicely with a custom 
drbd.conf for each site which simply excludes resources that are irrelevant 
to the current host.

Is there an option to make this work - using a single config file?  Should I 
even be trying this?

&:-)



resource drbd_dom0tooth {
  protocol      B;

  startup { wfc-timeout 0; degr-wfc-timeout 30; }
  device        /dev/drbd2;
  on dom0tooth {
    disk        /dev/VolGroup00/drbd_dom0tooth;
    address     192.168.0.6:7793;
    meta-disk   /dev/VolGroup00/drbd_dom0tooth_meta[0];
  }
  on black {
    address     192.168.0.11:7793;
    disk        /dev/local/drbd_dom0tooth;
    meta-disk   /dev/local/drbd_dom0tooth_meta[0];
  }
}

resource fnorbfoo {
  protocol      B;

  startup { wfc-timeout 0; degr-wfc-timeout 30; }
  device        /dev/drbd2;
  on fnorb {
    disk        /dev/doesnt/matter;
    address     192.168.0.9:7793;
    meta-disk   internal;
  }
  on foo {
    address     192.168.0.12:7793;
    disk        /dev/what/ever;
    meta-disk   internal;
  }
}