Can I configure pacemaker to continue to manage resources after a loss of quorum in RHEL 6, 7, 8 or 9 ?

Solution Verified - Updated

Environment

  • Red Hat Enterprise Linux (RHEL) 6, 7, 8 or 9 with the High Availability Add On
  • pacemaker

Issue

  • Can I configure pacemaker to continue to manage resources after a loss of quorum?
  • How do I use the no-quorum-policy attribute?

Resolution

IMPORTANT : Red Hat does not support management of cluster resources in a cluster partition that does not have quorum, thus the no-quorum-policy pacemaker property should not be set to ignore.

RHEL 6


`no-quorum-policy` should not be set to `ignore` in two-node clusters in RHEL 6, as `cman` is the quorum-provider in this release, and it allows one node to remain quorate as long as `` in `/etc/cluster/cluster.conf`. In larger clusters, a [quorum device can be configured](https://access.redhat.com/solutions/60257) to alter the vote count for quorum so that a single node can maintain quorum when all others have failed.

RHEL 7, 8 and 9


`no-quorum-policy` should not be set to `ignore`, as [`votequorum`'s `two_node` mode and `auto_tie_breaker` mode](https://access.redhat.com/solutions/1293523) can be used instead of ignoring quorum for two-node clusters, or `auto_tie_breaker` and/or `last_man_standing` can be used in larger clusters.

To reset no-quorum-policy attribute to default cluster setting use the command below.

# pcs property unset no-quorum-policy

Root Cause

pacemaker offers an attribute called no-quorum-policy which allows an administrator to configure the cluster to allow nodes to continue managing resources even after they have lost quorum. Red Hat does not recommend or support doing so.

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