[DRBD-user] Planning for Failure

[Eric Robinson]

I'm planning ahead, so we can act quickly if we have a drive media failure.

Our cluster nodes each have 6 x NVME drives in 1 volume group, which was created as follows:

[root at ha51b ~]# DISKS=$(nvme list|grep dev|awk '{print $1}')
[root at ha51b ~]# echo $DISKS
/dev/nvme0n1 /dev/nvme1n1 /dev/nvme2n1 /dev/nvme3n1 /dev/nvme4n1 /dev/nvme5n1 /dev/nvme6n1
[root at ha51b ~]# vgcreate vg0 $DISKS

We registered the VGs as Linstor storage pools and deployed multiple DRBD resources of various sizes across them.

Questions:


  1.  If 1 drive fails in a volume group, do all DRBD resources on the node go diskless, or just ones that happen to exist entirely on the failed drive?
  2.  What actions would we take to rebuild the node?

[cid:image001.png at 01D859C9.1DC04CB0]

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