Setting up Pacemaker (pcs) with DRBD
I am working on a high-availability NFS passive-active cluster with two nodes. I am on RHEL 7.6. Both nodes have DRBD setup on them with two partitions, /prod (/dev/drbd0) and /base (/dev/drbd1).
The drbd configuration is as follows:
resource r0 { volume 0 { device /dev/drbd0; disk /dev/VG03/prod; meta-disk internal; } volume 1 { device /dev/drbd1; disk /dev/VG03/base; meta-disk internal; } on node1 { address x.x.x.112:7789; } on node2 { address x.x.x.111:7789; } }
Now, that's all fine and dandy, but I'm stuck at setting up drbd WITH the cluster.
I setup the cluster, then ran these commands:
pcs -f drbd_cfg resource create NFS ocf:linbit:drbd drbd_resource=r0 op monitor interval=60s pcs -f drbd_cfg resource master r0Clone NFS master-max=1 master-node-max=1 clone-max=2 clone-node-max=1 notify=true pcs -f drbd_cfg resource show pcs cluster cib-push drbd_cfg --config
Those commands are setting up the resource with the cluster, but I haven't yet figured out setting up the file systems.
Current output of pcs status:
ken@node1:~$ sudo pcs status Cluster name: nfs WARNINGS: No stonith devices and stonith-enabled is not false Stack: corosync Current DC: node2 (version 1.1.19-8.el7_6.5-c3c624ea3d) - partition with quorum Last updated: Fri Jun 7 19:48:18 2019 Last change: Fri Jun 7 17:32:04 2019 by root via cibadmin on node1 2 nodes configured 2 resources configured Online: [ node1 node2 ] Full list of resources: Master/Slave Set: r0Clone [NFS] Masters: [ node1 ] Slaves: [ node2 ] Daemon Status: corosync: active/enabled pacemaker: active/enabled pcsd: active/enabled
Theoretically, would these be the next commands I need to run?
pcs cluster cib fs_cfg pcs -f fs_cfg resource create prod Filesystem device="/dev/drbd0" directory="/prod" fstype="xfs" pcs -f fs_cfg resource create base Filesystem device="/dev/drbd1" directory="/base" fstype="xfs" pcs -f fs_cfg constraint colocation add prod with r0Clone INFINITY with-rsc-role=Master pcs -f fs_cfg constraint colocation add base with r0Clone INFINITY with-rsc-role=Master pcs -f fs_cfg constraint order promote r0Clone then start prod pcs -f fs_cfg constraint order promote r0Clone then start base
Since I'm working with two volumes, it makes this a little more difficult. Has anybody worked with this before?
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