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Description

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 Switches1) wait_for_all2) 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

Who this course is for:

   Linux High Availability Clustering course is aimed at senior system administrators responsible for maximizing resiliency though high availability clustering services

Requirements

   PC or Laptop with internet Connection
   Red Hat Certified Engineer (RHCE) certification or equivalent experience.
   CentOS 7, RHEL7 ISO Image
   Vmware workstation

Last Updated 12/2019

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