Support Policies for RHEL High Availability Clusters - Alibaba Cloud Instances as Cluster Members

Contents

• Overview
  • Applicable Environments
  • Recommended Prior Reading
  • Useful References and Guides
  • Introduction
• Policies

Overview

Applicable Environments

• Red Hat Enterprise Linux (RHEL) with the High Availability Add-On
• Using Alibaba Cloud to provide instances that may serve as High Availability cluster members

Recommended Prior Reading

• General conditions with virtualized cluster members

Useful References and Guides

• Support Policies for RHEL High Availability Clusters
• Administrative Procedures - Installing and Configuring a Red Hat Enterprise Linux 7.6 (and later) High-Availability Cluster on Alibaba Cloud (Aliyun)

Introduction

This guide offers Red Hat's policies, requirements, and limitations applicable to the use of Alibaba Cloud 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.

Policies

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

• See: General conditions with virtualized cluster members

Supported releases for Alibaba Cloud instances as High Availability members: Red Hat supports RHEL High Availability cluster members running on Alibaba Cloud instances with the following RHEL releases or later:

• RHEL 8
  • RHEL 8.1 or later: Supported by Red Hat
  • RHEL 8.0: Supported by Red Hat with fence-agents-aliyun-4.2.1-30.el8 or later. For more information, refer to the following:
    • fence_aliyun fails on RHEL 8 with "NameError: name 'client' is not defined"
    • aliyuncli-ra configure fails with "NameError: name 'reload' is not defined"
• RHEL 7: Supported by Red Hat with RHEL 7.6 6 or later - using packages pacemaker-1.1.19-8.el7, corosync-2.4.3-4.el7, fence-agents-*-4.2.1-11.el7 or later.

Supported transport protocols: RHEL High Availability clusters with members that run on Alibaba Cloud can only use the udpu transport protocol - which is the default in RHEL 7 clusters.

Supported transport protocols: RHEL 7 High Availability clusters with members that run on the Alibaba Cloud platform can only use the udpu transport protocol - which is the default in RHEL 7 clusters.

Red Hat only supports the knet transport in RHEL 8, regardless of platform.

For more information, see:

• Support policies - Transport protocols
• Explore features - Overview of transport protocols
• Design guidance - Selecting the transport protocol