Planning for Failure

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

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