Overview

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:IntroductionWhat is clustering & cluster types?Advantages of Clustering ServersConcepts and techniquesResource and resource groupsFailover, Fencing, Shared Storage, Quorum Cluster ArchitectureLab Setup using KVM EnvironmentConfiguring a Basic ClusterConfiguring a fencing agent using KVM host mahcineTroubleshooting fencing deviceManaging Cluster NodesStarting & Stopping Cluster ServicesEnabling & Disabling the Cluster ServicesAdding & Removing A Cluster NodeThe Standby & unstandby NodesQuorum OperationsLab Session on quorumManaging Quorum CalculationsCluster Setup Switches1) wait_for_all2) auto_tie_breakerCreating and Configuring ResourcesCreate and configure high-availability resources.Creating a clustered Apache serviceManaging ResourcesTroubleshooting High-Availability ClusterInspect and configure cluster loggingTroubleshooting resource failuresTroubleshooting cluster network issuesComplex Resource GroupConfiguring an Active/Passive NFS Resource GroupLab SessionManaging ConstraintsTypes of constraints:Order, Location & Colocation ConstraintPractice Lab SessionTwo Node Cluster IssuesNo room for node failureSplit BrainFence death/fence racingThe cluster does not start until both nodes have started.Practice Lab SessionManaging iSCSI InitiatorsiSCSI fundamentalsConfiguring an iSCSI Server Several types of backing Storage block, fileio, pscsi & ramdiskCreating iSCSI TargetLab Session to create a block backstore from the targetcli shellManaging High Availability Logical VolumesClustered LVM & HA-LVMLab Session to shared a disk (lun) to all cluster nodesPractice Lab Session on HA-LVMManaging Clustered Logical VolumesActive/Active configuration of logical volumes Distributed Lock Manager (DLM) for lock managementclvmd daemon Practice Lab SessionGlobal File System 2 (GFS2) GFS2 conceptsCreating a GFS2 formatted Cluster File SystemsManaging a GFS2 File SystemManaging a GFS2 Resource in the clusterGrowing & Repairing a GFS2 File System

Skills

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