Readdressing drbd

DRBD
1

Hi all, a quick question about DRBD: how can I modify the IP addresses of a DRBD resource without service disruption?

I had the following working network part of the resource configuration:


on east { address 10.0.0.5:7000; }
on west { address 10.0.0.6:7000; }

Now I want to move both hosts to different addresses on the same network. So I added the addresses with

east# ip addr add dev eth0 10.0.0.15/24
west# ip addr add dev eth0 10.0.0.16/24

and I want to update the drbd resource configuration accordingly. I tried the following:

on east { node-id 0; }
on west { node-id 1; }
connection {
    path {
        host east address 10.0.0.5:7000;
        host west address 10.0.0.6:7000;
    }
    path {
        host east address 10.0.0.15:7000;
        host west address 10.0.0.16:7000;
    }
}

Now I want to apply the configuration. I did the drbdadm down and up on the secondary node, and drbdadm adjust on the primary one, but in tcpdump I still see no traffic to 10.0.0.1[56]:7000.

I also tried drbdsetup new-path:

east# drbdsetup new-path myresource 1 10.0.0.15:7000 10.0.0.16:7000
west# drbdsetup new-path myresource 0 10.0.0.16:7000 10.0.0.15:7000
west# drbdsetup del-path myresource 0 10.0.0.6:7000 10.0.0.5:7000
myresource: Failure: (162) Invalid configuration request
additional info from kernel:
del_path on transport failed
west#

So, what is the recommended way of moving the drbd connection to a different pair of addresses without disrupting the availability of the resource itself?

Thanks!

-Yenya