Overview

In the Red Hat High Availability Clustering (RH436) course, you will learn how to provide highly available network services to a mission-critical enterprise environment through the deployment and management of shared storage and server clusters. Created for senior Linux system administrators, this 4-day course strongly emphasizes lab-based activities.

You will set up a cluster of systems running the Pacemaker component of the Red Hat Enterprise Linux High-Availability Add-On, and deploy Linux-based services such as web servers and databases on that cluster. Cluster storage components from the Resilient Storage Add-On are also covered; installations and applications that require multiple cluster nodes can access the same storage simultaneously. This includes Logical Volume Manager (LVM) Shared Volume Groups, Red Hat Global File System 2 (GFS2), and Device-Mapper Multipath.

This course is based on Red Hat Enterprise Linux 8.3.

Duration

 05 days

Content summary

• Install and configure a Pacemaker-based high availability cluster
• Create and manage highly available services
• Troubleshoot common cluster issues
• Work with shared storage (iSCSI) and configure multipathing.
• Implement Logical Volume Manager (LVM) in cluster-aware configurations.
• Configure GFS2 file systems on storage shared by multiple nodes

Audience

Senior Linux system administrators who use high-availability clustering and fault-tolerant shared storage technologies to maximize resiliency of production services

Prerequisites

• Take our free assessment to gauge whether this offering is the best fit for your skills.
• Red Hat Certified System Administrator (RHCSA) exam (EX200) and associated courses.
• Red Hat Cerfitied Engineer (RHCE) exam (EX294) and associated courses

Course Outline               

1.       Creating high availability clusters

• Create a basic high availability cluster

2.       Managing cluster nodes and quorum

• Manage node membership in the cluster and describe how it impacts cluster operation

3.       Isolating malfunctioning cluster nodes

• Isolate unresponsive cluster nodes to protect data and recover services and resources after a failure

4.       Creating and configuring resources

• Create basic resources and resource groups to provide highly available services

5.       Troubleshooting high availability clusters

• Create and configure simple resource groups to provide high-availability services to clients.Identify, diagnose, and fix cluster issues

6.       Automating cluster and resource deployment

• Deploy a new high availability cluster and cluster resources using Ansible automation

7.       Managing two-node clusters

• Operate two-node clusters while identifying and avoiding issues specific to a two-node cluster configuration

8.       Accessing iSCSI storage

• Configure iSCSI initiators on your servers to access block-based storage devices provided by network storage arrays or Ceph storage clusters

9.       Accessing storage devices resiliently

• Configure resilient access to storage devices that have multiple access paths

10.   Configuring LVM in clusters

• Select, configure, and manage the correct LVM configuration for use in your cluster

11.   Providing storage with the GFS2 cluster file system

• Use the GFS2 cluster file system to simultaneously pProvide tightly coupled shared storage that can be accessed by multiple nodes

12.   Eliminating single points of failure

• Identify and eliminate single points of failure in your cluster to decrease risk and increase average service availability