[DRBD-user] lost connection on node3 when switching over from node1 to node2

[Pierre LEBRECH]

hello,

when I switch over HA services from node1 to node2, node3 looses its connection. But nearly 10 seconds later, it
reconnects automatically.

Is it normal?





context : 3-node cluster, every node connected, HA services on node1, DRBD version 8.3.2 on linux 2.6.30.






here is the drbd.conf file :

global {
    usage-count yes;
}
common {
  syncer { rate 10M; }
  net {
    max-buffers 40000;
  }
}

resource r0 {
  protocol C;
  handlers {
    pri-on-incon-degr "echo o > /proc/sysrq-trigger ; halt -f";
    pri-lost-after-sb "echo o > /proc/sysrq-trigger ; halt -f";
    local-io-error "echo o > /proc/sysrq-trigger ; halt -f";
  }
  startup {
    wfc-timeout  0;
    degr-wfc-timeout 120;
  }
  disk {
    on-io-error   detach;
  }
  net {
    after-sb-0pri disconnect;
    after-sb-1pri disconnect;
    after-sb-2pri disconnect;
    rr-conflict disconnect;
  }
  syncer {
    rate 90M;
    al-extents 128;
    csums-alg md5;
  }

  on node1 {
      device     /dev/drbd0;
      disk       /dev/md2;
      address    10.0.0.1:7788;
      meta-disk  /dev/md1 [0];
  }
  on node2 {
      device     /dev/drbd0;
      disk       /dev/md2;
      address    10.0.0.2:7788;
      meta-disk  /dev/md1 [0];
  }
}

resource r0-U {
  protocol C;

  syncer {
    csums-alg md5;
	rate 5M;
  }

  stacked-on-top-of r0 {
    device    /dev/drbd1;
    address   192.168.2.15:7788;
  }

  on node3 {
    device    /dev/drbd1;
    disk      /dev/md2;
    address   192.168.2.14:7788;
    meta-disk internal;
  }


}