Support Policies for RHEL Resilient Storage - Cluster Network Interconnect Interfaces

Updated -

Contents

Overview

Applicable Environments

  • Red Hat Enterprise Linux (RHEL) with the Resilient Storage Add-On

Useful References and Guides

Introduction

This policy guide describes Red Hat's policies around the underlying High Availability cluster's network-interconnect design. Users of RHEL Resilient Storage components should adhere to these policies in order to be eligible for support from Red Hat with the appropriate product support subscriptions.

Policies

No RRP with dlm or Resilient Storage: The components provided with RHEL Resilient Storage all utilize or interact with dlm in some manner to carry out their clustered functionality. dlm is not compatible with RHEL High Availability's RRP redundancy protocol for cluster node interconnection. As such, Red Hat does not support usage of any RHEL Resilient Storage component in clusters that are configured to use RRP for node-interconnection.


Resilient Storage supports only one cluster membership ring in RHEL 8: The components provided with RHEL Resilient Storage all utilize or interact with dlm in some manner to carry out their clustered functionality. dlm is not compatible with RHEL 8 High Availability's ability to use multiple rings in a cluster with knet. As such, Red Hat does not support usage of any RHEL Resilient Storage component in clusters that are configured to use multiple membership rings. Red Hat recommends using bonding or teaming for redundancy of the single membership ring.


Special latency policies: RHEL Resilient Storage comes with special latency requirements that differ from RHEL High Availability's policies in this area.


RHEL High Availability policies otherwise apply: RHEL Resilient Storage adopts the policies applicable to RHEL High Availability, except where otherwise covered above or in other RHEL Resilient Storage policy guides.