Support Policies for RHEL High Availability Clusters - corosync-qdevice and corosync-qnetd

Updated -



Applicable Environments

  • Red Hat Enterprise Linux (RHEL) 7 with the High Availability Add-On
  • Cluster architectures involving a quorum device provided through qdevice and qnetd

Useful References and Guides


This policy guide explains Red Hat's requirements and support limitations regarding quorum devices using corosync-device and corosync-qnetd in a RHEL 7 cluster.


Available/Supported Releases: corosync-qdevice and corosync-qnetd are supported technologies as of RHEL 7 Update 4 - using releases corosync-qdevice-2.4.0-9.el7 and corosync-qnetd-2.4.0-9.el7 or later.

  • qdevice and qnetd are available for usage in RHEL High Availability clusters starting with RHEL 7 Update 3, but are considered a Technology Preview in that release.

Number of Quorum Devices / Servers: A cluster may only utilize a single qdevice interacting with a single qnetd quorum server.

Number of Clusters per Quorum Device / Server: Multiple clusters may utilize the same qnetd quorum server.