[DRBD-user] RedHat Clustering Services does not fence when DRBD breaks

Jakov Sosic jakov.sosic at srce.hr
Tue Nov 23 22:57:47 CET 2010

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

On 11/23/2010 07:15 PM, J. Ryan Earl wrote:

> Short answer is: No.
> In general, you should not handle active-active DRBD devices with RHCS.
>  You only want to handle DRBD devices that are active only on one node
> at a time in RHCS (at least with CentOS/RHEL5 I haven't checked 6 yet).
>  Basically if the DRBD device changing to active is a dependency of a
> service (ie you have an ext4 filesystem on the DRBD device) that must be
> active and mounted. Think of DRBD as just shared storage in the
> active-active case, you treat it as you would say a SAN or iSCSI LUN
> block device.  If you were worried about connectivity to shared storage,
> you could setup a quorum disk as one of the LVs on top of the DRBD PV.

Also I would recommend to use CLVM on top of primary/primary DRBD.

Jakov Sosic

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