[DRBD-user] multiple resources configuration

Keith Ouellette KeithO at fibermountain.com
Tue Nov 18 03:38:20 CET 2014

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.


I am trying to setup two systems with two replicated volumes in two cluster configuration. I am not quite sure what the best approach is, but I tried it in two different ways. One is to create multiple volumes in a single resource like the example in the drbd.org documentation and had them configured like the following on both nodes:

resource r0 {
        volume 0 {
                device          /dev/drbd0;
                disk            /dev/GROUP0/AOSman;
                flexible-meta-disk      internal;
        }
        volume 1 {
                device          /dev/drbd1;
                disk            /dev/GROUP0/AOScon;
                flexible-meta-disk      internal;
        }
        on FMAOS1 {
                address         10.0.5.65:7788;
        }
        on FMAOS2 {
                address         10.0.5.66:7788;
        }
}

However that yielded the following results when I did a "cat /proc/drbd"

fmadmin at FMAOS1:/etc/drbd.d$ cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
srcversion: F97798065516C94BE0F27DC
0: cs:Connected ro:Primary/Secondary ds:UpToDate/UpToDate C r-----
    ns:180 nr:0 dw:180 dr:7513 al:5 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
1: cs:Connected ro:Secondary/Secondary ds:Diskless/Diskless C r-----
    ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0


I then tried to define two resource files for two different resources:

fmadmin at FMAOS1:/etc/drbd.d$ sudo cat r0.res
resource r0 {
        on FMAOS1 {
                volume 0 {
                        device          /dev/drbd0;
                        disk            /dev/GROUP0/AOSman;
                        flexible-meta-disk      internal;
                }
                address         10.0.5.65:7788;
        }
        on FMAOS2 {
                volume 0 {
                        device          /dev/drbd0;
                        disk            /dev/GROUP0/AOSman;
                        flexible-meta-disk      internal;
                }
                address         10.0.5.66:7788;
        }
}

fmadmin at FMAOS1:/etc/drbd.d$ sudo cat r1.res
resource r1 {
        on FMAOS1 {
                volume 0 {
                        device          /dev/drbd1;
                        disk            /dev/GROUP0/AOScon;
                        flexible-meta-disk      internal;
                }
                address         10.0.5.65:7789;
        }
        on FMAOS2 {
                volume 0 {
                        device          /dev/drbd1;
                        disk            /dev/GROUP0/AOScon;
                        flexible-meta-disk      internal;
                }
                address         10.0.5.66:7789;
        }
}

That also yielded the following:

fmadmin at FMAOS2:/etc/drbd.d$ cat /proc/drbd
version: 8.4.3 (api:1/proto:86-101)
srcversion: F97798065516C94BE0F27DC
0: cs:Connected ro:Secondary/Primary ds:UpToDate/UpToDate C r-----
    ns:0 nr:180 dw:180 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
1: cs:Connected ro:Secondary/Secondary ds:Diskless/Diskless C r-----
    ns:0 nr:0 dw:0 dr:0 al:0 bm:0 lo:0 pe:0 ua:0 ap:0 ep:1 wo:f oos:0
node already registered

I am not sure what Diskless/Diskless really means, I suspect that whatever is causing that may be causing my issue. Nor, am I sure if either of the two ways re correct or if both are a way to do it.

I also see the following when restarting the drbd service:

[
     create res: r0 r1
   prepare disk: r0 r1
    adjust disk: r0 r1:failed(apply-al:255)
     adjust net: r0 r1
]

                                                                         [ OK ]

Any help or pointing to the right direction would be extremely appreciated.

[cid:fm-logodb8643]<http://www.fibermountain.com>
Keith Ouellette

KeithO at fibermountain.com


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Cheshire, CT06410
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