Cluster fencing not working with SBD partition
This document (7010932) is provided subject to the disclaimer at the end of this document.
Split Brain Detection (SBD) Partition
The cluster information base (CIB) shows the following node list:
# /usr/sbin/sbd -d /dev/sdb1 list
0 hn1 clear
# /usr/sbin/sbd -d /dev/sdc1 list
0 hn1 clear
1 hn2 clear
# /usr/sbin/cibadmin -Q
<node id="hn1" type="normal" uname="hn1"/>
<node id="hn2" type="normal" uname="hn2"/>
1. Display the current SBD partitions.
# cat /etc/sysconfig/sbd
2. Confirm that the shared device names listed in /etc/sysconfig/sbd exist with the same device path on all nodes, and are the same physical media (ie confirm /dev/sdb1, /dev/sdc1 and /dev/sdd1 exist on all nodes and all nodes have the same device path for each. In other words, one device cannot be /dev/sdc1 on node1 and /dev/sdf1 on node2).
3. Confirm that the same /etc/sysconfig/sbd exists on all nodes. The devices listed must exist on all nodes.
# scp /etc/sysconfig/sbd hn2:/etc/sysconfig/
4. Reformat the SBD partition on each devices listed:
# sbd -d /dev/sdb1 -d /dev/sdc1 -d /dev/sdd1 create
5. Reboot one node in the cluster. When it comes back online, reboot another node. Repeat the process until each node in the cluster has been rebooted.
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- Document ID:7010932
- Creation Date: 15-Oct-2012
- Modified Date:03-Mar-2020
- SUSE Linux Enterprise High Availability Extension
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