Linux High Availability Clustering

Design and deploy a high availability cluster to provide active/passive or active/active services using HA Pacemaker

This course helps you to understand high availability clustering by providing a strong concept and hands-on experience with Pacemaker and Corosync components of Red Hat / CentOS Enterprise High Availability Cluster.

Lab Design : KVM based lab setup in this course module.

Subtitle is not added in this course module.

Course Content:


  • What is clustering & cluster types?

  • Advantages of Clustering Servers

  • Concepts and techniques

  • Resource and resource groups

  • Failover, Fencing, Shared Storage, Quorum

  • Cluster Architecture

  • Lab Setup using KVM Environment

  • Configuring a Basic Cluster

  • Configuring a fencing agent using KVM host mahcine

  • Troubleshooting fencing device

Managing Cluster Nodes

  • Starting & Stopping Cluster Services

  • Enabling & Disabling the Cluster Services

  • Adding & Removing A Cluster Node

  • The Standby & unstandby Nodes

  • Quorum Operations

  • Lab Session on quorum

  • Managing Quorum Calculations

  • Cluster Setup Switches

    1) wait_for_all

    2) auto_tie_breaker

Creating and Configuring Resources

  • Create and configure high-availability resources.

  • Creating a clustered Apache service

  • Managing Resources

Troubleshooting High-Availability Cluster

  • Inspect and configure cluster logging

  • Troubleshooting resource failures

  • Troubleshooting cluster network issues

Complex Resource Group

  • Configuring an Active/Passive NFS Resource Group

  • Lab Session

Managing Constraints

  • Types of constraints:

  • Order, Location & Colocation Constraint

  • Practice Lab Session

Two Node Cluster Issues

  • No room for node failure

  • Split Brain

  • Fence death/fence racing

  • The cluster does not start until both nodes have started.

  • Practice Lab Session

Managing iSCSI Initiators

  • iSCSI fundamentals

  • Configuring an iSCSI Server

  • Several types of backing Storage

  • block, fileio, pscsi & ramdisk

  • Creating iSCSI Target

  • Lab Session to create a block backstore from the targetcli shell

Managing High Availability Logical Volumes

  • Clustered LVM & HA-LVM

  • Lab Session to shared a disk (lun) to all cluster nodes

  • Practice Lab Session on HA-LVM

Managing Clustered Logical Volumes

  • Active/Active configuration of logical volumes

  • Distributed Lock Manager (DLM) for lock management

  • clvmd daemon

  • Practice Lab Session

Global File System 2 (GFS2)

  • GFS2 concepts

  • Creating a GFS2 formatted Cluster File Systems

  • Managing a GFS2 File System

  • Managing a GFS2 Resource in the cluster

  • Growing & Repairing a GFS2 File System

  • Course Category: IT & Software
  • Size: 2.75 GiB
  • Download: Download
  • Rating: 4.21