[Update Course] Linux High Availability Clustering | Udemy

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:

Introduction

• 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