Support Policies for RHEL High Availability Clusters - corosync-qdevice and corosync-qnetd
Contents
Overview
Applicable Environments
- Red Hat Enterprise Linux (RHEL) 7 with the High Availability Add-On
- Cluster architectures involving a quorum device provided through
qdeviceandqnetd
Useful References and Guides
- Support Policies for RHEL High Availability Clusters
- RHEL High Availability Reference Guide - Quorum Devices
- Explore components:
corosync-qdeviceandcorosync-qnetd - Design Guidance for RHEL High Availability Clusters - Considerations with qdevice Quorum Arbitration
Introduction
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.
Policies
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.
qdeviceandqnetdare 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.
