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Red Hat Enterprise Linux 6

High Availability Add-On Overview

Overview of the High Availability Add-On for Red Hat Enterprise Linux

Edition 2

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Abstract
High Availability Add-On Overview provides an overview of the High Availability Add-On for Red Hat Enterprise Linux 6.

Introduction
1. Document Conventions
1.1. Typographic Conventions
1.2. Pull-quote Conventions
1.3. Notes and Warnings
2. We Need Feedback!
1. High Availability Add-On Overview
1.1. Cluster Basics
1.2. High Availability Add-On Introduction
1.3. Cluster Infrastructure
2. Cluster Management with CMAN
2.1. Cluster Quorum
2.1.1. Quorum Disks
2.1.2. Tie-breakers
3. RGManager
3.1. Failover Domains
3.1.1. Behavior Examples
3.2. Service Policies
3.2.1. Start Policy
3.2.2. Recovery Policy
3.2.3. Restart Policy Extensions
3.3. Resource Trees - Basics / Definitions
3.3.1. Parent / Child Relationships, Dependencies, and Start Ordering
3.4. Service Operations and States
3.4.1. Service Operations
3.4.2. Service States
3.5. Virtual Machine Behaviors
3.5.1. Normal Operations
3.5.2. Migration
3.5.3. RGManager Virtual Machine Features
3.5.4. Unhandled Behaviors
3.6. Resource Actions
3.6.1. Return Values
4. Fencing
5. Lock Management
5.1. DLM Locking Model
5.2. Lock States
6. Configuration and Administration Tools
6.1. Cluster Administration Tools
7. Virtualization and High Availability
7.1. VMs as Highly Available Resources/Services
7.1.1. General Recommendations
7.2. Guest Clusters
7.2.1. Using fence_scsi and iSCSI Shared Storage
7.2.2. General Recommendations
A. Revision History