Support Policies for RHEL High Availability Clusters - RHV Virtual Machines as Cluster Members
Contents
Overview
Applicable Environments
- Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add-On
- Using Red Hat Virtualization (RHV) to provide VMs that may serve as High Availability cluster members
Recommended Prior Reading
Useful References and Guides
- Support Policies for RHEL High Availability Clusters
- Red Hat documentation for Red Hat Virtualization (RHV)
Introduction
This guide offers Red Hat's policies, requirements, and limitations applicable to the use of RHV virtual machines as members of a RHEL High Availability cluster. Users of RHEL High Availability software components should adhere to these policies by installing only on the approved platforms in order to be eligible to receive assistance from Red Hat Support with the appropriate support subscriptions.
Policies
Consider general conditions for support of RHEL High Availability in virtualization environments
Supported RHV products/releases with RHEL High Availability:
| RHV-M Version | VM OS |
|---|---|
| 4.1 |
|
| 4.0 |
|
| 3.1 - 3.6 |
|
| 3.0 |
|
| 2.2 |
|
Any product/release combination not listed here is not supported by Red Hat.
[1] Red Hat is investigating a potential issue with RHV emulated qemu storage devices being shared and used within a RHEL High Availability cluster. Please contact Red Hat Support for more information if using RHEL 7 Update 4 with RHEV 4.1 and qemu shared storage devices.
Supported fence methods: See applicable support policies for individual fence methods that may apply to VMware environments. To reference those that are most commonly considered in such environments:
- Support policies -
sbdandfence_sbd- For guidance in setting up a watchdog device for RHV VMs, see: Presenting a watchdog device to RHV virtual machines to use for
sbdfencing
- For guidance in setting up a watchdog device for RHV VMs, see: Presenting a watchdog device to RHV virtual machines to use for
fence_rhevm- For guidance in setting up
fence_rhevmSTONITH for RHV VMs, see: Configuring RHV-M REST API Power Fencing for RHEL 7 RHV Virtual Machine Cluster Members
- For guidance in setting up
- Support policies -
fence_scsi/fence_mpath- Note:
fence_scsiandfence_mpathare only known to be compatible with RHV'svirtio-scsistorage emulation mode, or with iSCSI devices accessed directly by VMs without passthrough of RHV layers.
- Note:
Mixed baremetal and RHEV VM clusters: Red Hat does not support clusters consisting of a mix of baremetal and virtual machine members.
