IBM PowerHA SystemMirror 7.1 for AIX


4 марта вышел в свет новый Redbook посвящённый IBM PowerHA SystemMirror. Рассматриваются вопросы настройки, управления и мониторинга. Много внимания уделено планированию кластера (а планирование, как известно, это самая главная часть в любом IT решении). Планирование и настройка сети (в том числе RSCT), SAN (настройка СЖД, зонинг и пр.). Отдельная глава посвящена определению проблем в PowerHA. Очень полезной будет глава посвящённая мониторингу и управлению PowerHA с помощью IBM Systems Director.

Abstract

IBM® PowerHA™ SystemMirror 7.1 for AIX® is a major product announcement for IBM in the high availability space for IBM Power Systems™ Servers. This release now has a deeper integration between the IBM high availability solution and IBM AIX. It features integration with the IBM Systems Director, SAP Smart Assist and cache support, the IBM System Storage® DS8000® Global Mirror support, and support for Hitachi Storage.

This IBM Redbooks® publication contains information about the IBM PowerHA SystemMirror 7.1 release for AIX. This release includes fundamental changes, in particular departures from how the product has been managed in the past, which has necessitated this Redbooks publication.

This Redbooks publication highlights the latest features of PowerHA SystemMirror 7.1 and explains how to plan for, install, and configure PowerHA with the Cluster Aware AIX component. It also introduces you to PowerHA SystemMirror Smart Assist for DB2®. This book guides you through migration scenarios and demonstrates how to monitor, test, and troubleshoot PowerHA 7.1. In addition, it shows how to use IBM Systems Director for PowerHA 7.1 and how to install the IBM Systems Director Server and PowerHA SystemMirror plug-in. Plus, it explains how to perform disaster recovery using IBM DS8700 Global Mirror and Hitachi TrueCopy and Universal Replicator.

This publication targets all technical professionals (consultants, IT architects, support staff, and IT specialists) who are responsible for delivering and implementing high availability solutions for their enterprise.

Table of contents

Chapter 1. PowerHA SystemMirror architecture foundation
Chapter 2. Features of PowerHA SystemMirror 7.1
Chapter 3. Planning a cluster implementation for high availability
Chapter 4. Installing PowerHA SystemMirror 7.1 for AIX
Chapter 5. Configuring a PowerHA cluster
Chapter 6. IBM PowerHA SystemMirror Smart Assist for DB2
Chapter 7. Migrating to PowerHA 7.1
Chapter 8. Monitoring a PowerHA SystemMirror 7.1 for AIX cluster
Chapter 9. Testing the PowerHA 7.1 cluster
Chapter 10. Troubleshooting PowerHA 7.1
Chapter 11. Installing IBM Systems Director and the PowerHA SystemMirror plug-in
Chapter 12. Creating and managing a cluster using IBM Systems Director
Chapter 13. Disaster recovery using DS8700 Global Mirror
Chapter 14. Disaster recovery using Hitachi TrueCopy and Universal Replicator
Appendix A. CAA cluster commands
Appendix B. PowerHA SMIT tree
Appendix C. PowerHA supported hardware
Appendix D. The clmgr man page

Detailed TOC

Chapter 1. PowerHA SystemMirror architecture foundation
1.1 Reliable Scalable Cluster Technology
1.1.1 Overview of the components for Reliable Scalable Cluster Technology
1.1.2 Architecture changes for RSCT 3.1
1.1.3 PowerHA and RSCT
1.2 Cluster Aware AIX
1.2.1 CAA daemons
1.2.2 RSCT changes
1.2.3 The central repository
1.2.4 Cluster event management
1.3 Cluster communication
1.3.1 Communication interfaces
1.3.2 Communication node status
1.3.3 Considerations for the heartbeat configuration
1.3.4 Deciding when a node is down: Round-trip time (rtt)
1.4 PowerHA 7.1 SystemMirror plug-in for IBM Systems Director
1.4.1 Introduction to IBM Systems Director
1.4.2 Advantages of using IBM Systems Director
1.4.3 Basic architecture
Chapter 2. Features of PowerHA SystemMirror 7.1
2.1 Deprecated features
2.2 New features
2.3 Changes to the SMIT panel
2.3.1 SMIT tree
2.3.2 The smitty hacmp command
2.3.3 The smitty clstart and smitty clstop commands
2.3.4 Cluster Standard Configuration menu
2.3.5 Custom Cluster Configuration menu
2.3.6 Cluster Snapshot menu
2.3.7 Configure Persistent Node IP Label/Address menu
2.4 The rootvg system event
2.5 Resource management enhancements
2.5.1 Start After and Stop After resource group dependencies
2.5.2 User-defined resource type
2.5.3 Dynamic node priority: Adaptive failover
2.6 CLUSTER_OVERRIDE environment variable
2.7 CAA disk fencing
2.8 PowerHA SystemMirror event flow differences
2.8.1 Startup processing
2.8.2 Another node joins the cluster
2.8.3 Node down processing normal with takeover
Chapter 3. Planning a cluster implementation for high availability
3.1 Software requirements
3.1.1 Prerequisite for AIX BOS and RSCT components
3.2 Hardware requirements
3.2.1 Supported hardware
3.2.2 Requirements for the multicast IP address, SAN, and repository disk
3.3 Considerations before using PowerHA 7.1
3.4 Migration planning
3.5 Storage
3.5.1 Shared storage for the repository disk
3.5.2 Adapters supported for storage communication
3.5.3 Multipath driver
3.5.4 System Storage Interoperation Center
3.6 Network
3.6.1 Multicast address
3.6.2 Network interfaces
3.6.3 Subnetting requirements for IPAT via aliasing
3.6.4 Host name and node name
3.6.5 Other network considerations
Chapter 4. Installing PowerHA SystemMirror 7.1 for AIX
4.1 Hardware configuration of the test environment
4.1.1 SAN zoning
4.1.2 Shared storage
4.1.3 Configuring the FC adapters for SAN-based communication
4.2 Installing PowerHA file sets
4.2.1 PowerHA software installation example
4.3 Volume group consideration
Chapter 5. Configuring a PowerHA cluster
5.1 Cluster configuration using SMIT
5.1.1 SMIT menu changes
5.1.2 Overview of the test environment
5.1.3 Typical configuration of a cluster topology
5.1.4 Custom configuration of the cluster topology
5.1.5 Configuring resources and applications
5.1.6 Configuring Start After and Stop After resource group dependencies
5.1.7 Creating a user-defined resource type
5.1.8 Configuring the dynamic node priority (adaptive failover)
5.1.9 Removing a cluster
5.2 Cluster configuration using the clmgr tool
5.2.1 The clmgr action commands
5.2.2 The clmgr object classes
5.2.3 Examples of using the clmgr command
5.2.4 Using help in clmgr
5.2.5 Configuring a PowerHA cluster using the clmgr command
5.2.6 Alternative output formats for the clmgr command
5.2.7 Log file of the clmgr command
5.2.8 Displaying the log file content by using the clmgr command
5.3 PowerHA SystemMirror for IBM Systems Director
Chapter 6. IBM PowerHA SystemMirror Smart Assist for DB2
6.1 Prerequisites
6.1.1 Installing the required file sets
6.1.2 Installing DB2 on both nodes
6.1.3 Importing the shared volume group and file systems
6.1.4 Creating the DB2 instance and database on the shared volume group
6.1.5 Updating the /etc/services file on the secondary node
6.1.6 Configuring IBM PowerHA SystemMirror
6.2 Implementing a PowerHA SystemMirror cluster and Smart Assist for DB2 7.1
6.2.1 Preliminary steps
6.2.2 Starting Smart Assist for DB2
6.2.3 Completing the configuration
Chapter 7. Migrating to PowerHA 7.1
7.1 Considerations before migrating
7.2 Understanding the PowerHA 7.1 migration process
7.2.1 Stages of migration
7.2.2 Premigration checking: The clmigcheck program
7.3 Snapshot migration
7.3.1 Overview of the migration process
7.3.2 Performing a snapshot migration
7.3.3 Checklist for performing a snapshot migration
7.3.4 Summary
7.4 Rolling migration
7.4.1 Planning
7.4.2 Performing a rolling migration
7.4.3 Checking your newly migrated cluster
7.5 Offline migration
7.5.1 Planning the offline migration
7.5.2 Offline migration flow
7.5.3 Performing an offline migration
Chapter 8. Monitoring a PowerHA SystemMirror 7.1 for AIX cluster
8.1 Collecting information before a cluster is configured
8.2 Collecting information after a cluster is configured
8.3 Collecting information after a cluster is running
8.3.1 AIX commands and log files
8.3.2 CAA commands and log files
8.3.3 PowerHA 7.1 cluster monitoring tools
8.3.4 PowerHA ODM classes
8.3.5 PowerHA clmgr utility
8.3.6 IBM Systems Director web interface
8.3.7 IBM Systems Director CLI (smcli interface)
Chapter 9. Testing the PowerHA 7.1 cluster
9.1 Testing the SAN-based heartbeat channel
9.2 Testing the repository disk heartbeat channel
9.2.1 Background
9.2.2 Testing environment
9.3 Simulation of a network failure
9.3.1 Background
9.3.2 Testing environment
9.3.3 Testing a network failure
9.4 Testing the rootvg system event
9.4.1 The rootvg system event
9.4.2 Testing the loss of the rootvg volume group
9.4.3 Loss of rootvg: What PowerHA logs
9.5 Simulation of a crash in the node with an active resource group
9.6 Simulations of CPU starvation
9.7 Simulation of a Group Services failure
9.8 Testing a Start After resource group dependency
9.8.1 Testing the standard configuration of a Start After resource group dependency
9.8.2 Testing application startup with Startup Monitoring configured
9.9 Testing dynamic node priority
Chapter 10. Troubleshooting PowerHA 7.1
10.1 Locating the log files
10.1.1 CAA log files
10.1.2 PowerHA log files
10.2 Troubleshooting the migration
10.2.1 The clmigcheck script
10.2.2 The ‘Cluster still stuck in migration’ condition
10.2.3 Existing non-IP networks
10.3 Troubleshooting the installation and configuration
10.3.1 The clstat and cldump utilities and the SNMP
10.3.2 The /var/log/clcomd/clcomd.log file and the security keys
10.3.3 The ECM volume group
10.3.4 Communication path
10.4 Troubleshooting problems with CAA
10.4.1 Previously used repository disk for CAA
10.4.2 Repository disk replacement
10.4.3 CAA cluster after the node restarts
10.4.4 Creation of the CAA cluster
10.4.5 Volume group name already in use
10.4.6 Changed PVID of the repository disk
10.4.7 The ‘Cluster services are not active’ message
Chapter 11. Installing IBM Systems Director and the PowerHA SystemMirror plug-in
11.1 Installing IBM Systems Director Version 6.2
11.1.1 Hardware requirements
11.1.2 Installing IBM Systems Director on AIX
11.1.3 Configuring and activating IBM Systems Director
11.2 Installing the SystemMirror plug-in
11.2.1 Installing the SystemMirror server plug-in
11.2.2 Installing the SystemMirror agent plug-in in the cluster nodes
11.3 Installing the clients
11.3.1 Installing the common agent
11.3.2 Installing the PowerHA SystemMirror agent
Chapter 12. Creating and managing a cluster using IBM Systems Director
12.1 Creating a cluster
12.1.1 Creating a cluster with the SystemMirror plug-in wizard
12.1.2 Creating a cluster with the SystemMirror plug-in CLI
12.2 Performing cluster management
12.2.1 Performing cluster management with the SystemMirror plug-in GUI wizard
12.2.2 Performing cluster management with the SystemMirror plug-in CLI
12.3 Creating a resource group with the SystemMirror plug-in GUI wizard
12.3.1 Creating a custom resource group
12.3.2 Creating a predefined resource group
12.3.3 Verifying the creation of a resource group
12.4 Managing a resource group
12.4.1 Resource group management using the SystemMirror plug-in wizard
12.4.2 Managing a resource group with the SystemMirror plug-in CLI
12.5 Verifying and synchronizing a configuration
12.5.1 Verifying and synchronizing a configuration with the GUI
12.5.2 Verifying and synchronizing with the CLI
12.6 Performing cluster monitoring with the SystemMirror plug-in
12.6.1 Monitoring cluster activities before starting a cluster
12.6.2 Monitoring an active cluster
12.6.3 Recovering from cluster configuration issues
Chapter 13. Disaster recovery using DS8700 Global Mirror
13.1 Planning for Global Mirror
13.1.1 Software prerequisites
13.1.2 Minimum DS8700 requirements
13.1.3 Considerations
13.2 Installing the DSCLI client software
13.3 Scenario description
13.4 Configuring the Global Mirror resources
13.4.1 Checking the prerequisites
13.4.2 Identifying the source and target volumes
13.4.3 Configuring the Global Mirror relationships
13.5 Configuring AIX volume groups
13.5.1 Configuring volume groups and file systems on primary site
13.5.2 Importing the volume groups in the remote site
13.6 Configuring the cluster
13.6.1 Configuring the cluster topology
13.6.2 Configuring cluster resources and resource group
13.7 Failover testing
13.7.1 Graceful site failover
13.7.2 Rolling site failure
13.7.3 Site re-integration
13.8 LVM administration of DS8000 Global Mirror replicated resources
13.8.1 Adding a new Global Mirror pair to an existing volume group
13.8.2 Adding a Global Mirror pair into a new volume group
Chapter 14. Disaster recovery using Hitachi TrueCopy and Universal Replicator
14.1 Planning for TrueCopy/HUR management
14.1.1 Software prerequisites
14.1.2 Minimum connectivity requirements for TrueCopy/HUR
14.1.3 Considerations
14.2 Overview of TrueCopy/HUR management
14.2.1 Installing the Hitachi CCI software
14.2.2 Overview of the CCI instance
14.2.3 Creating and editing the horcm.conf files
14.3 Scenario description
14.4 Configuring the TrueCopy/HUR resources
14.4.1 Assigning LUNs to the hosts (host groups)
14.4.2 Creating replicated pairs
14.4.3 Configuring an AIX disk and dev_group association
14.4.4 Defining TrueCopy/HUR managed replicated resource to PowerHA
14.5 Failover testing
14.5.1 Graceful site failover for the Austin site
14.5.2 Rolling site failure of the Austin site
14.5.3 Site re-integration for the Austin site
14.5.4 Graceful site failover for the Miami site
14.5.5 Rolling site failure of the Miami site
14.5.6 Site re-integration for the Miami site
14.6 LVM administration of TrueCopy/HUR replicated pairs
14.6.1 Adding LUN pairs to an existing volume group
14.6.2 Adding a new logical volume
14.6.3 Increasing the size of an existing file system
14.6.4 Adding a LUN pair to a new volume group

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