Support Policies for RHEL High Availability Clusters - Amazon Web Services (AWS) EC2 Instances as Cluster Members

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Applicable Environments

  • Red Hat Enterprise Linux (RHEL) 6 or 7 with the High Availability Add-On
  • Using Amazon EC2 to provide instances that may serve as High Availability cluster members

Useful References and Guides


This guide offers Red Hat's policies, requirements, and limitations applicable to the use of Amazon Web Services (EC2) instances 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.


Consider general conditions for support of RHEL High Availability in virtualization environments

Supported releases for Amazon AWS EC2 instances as High Availability members: Red Hat supports RHEL High Availability cluster members running on Amazon Web Services (AWS) EC2 instances with the following RHEL releases or later:

  • RHEL 7 Update 5 or later - Supported with packages pacemaker-1.1.18-11.el7, corosync-2.4.3-2.el7, fence-agents-*-4.0.11-86.el7 or later.

Supported transport protocols: RHEL High Availability clusters with members that run on the Amazon EC2 platform can only use the udpu transport protocol - which is the default in RHEL 7 clusters. AWS VPC networks do not support multicast traffic, preventing the usage of the udp transport protocol.

Shared storage: RHEL High Availability clusters do not support shared storage with LVM (including tagging, clvmd, etc).

For more information, see: