Red Hat High Availability Clustering (RH436)

Outline for this course

Creating high availability clusters

Create a basic high availability cluster.

Managing cluster nodes and quorum

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

Isolating malfunctioning cluster nodes

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

Creating and configuring resources

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

Troubleshooting high availability clusters

Identify, diagnose, and fix cluster issues.

Automating cluster and resource deployment

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

Managing two-node clusters

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

Accessing iSCSI storage

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

Accessing storage devices resiliently

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

Configuring LVM in clusters

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

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.

Eliminating single points of failure

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

Note: Course outline is subject to change with technology advances and as the nature of the underlying job evolves. For questions or confirmation on a specific objective or topic, please contact a training specialist.

Outcomes

Impact on the organization

High availability clustering can improve reliability, availability, and resiliency of your mission-critical services, resulting in reduced downtime and easier hardware maintenance.

Red Hat has created this course in a way intended to benefit our customers, but each company and infrastructure is unique, and actual results or benefits may vary.

Impact on the individual

As a result of attending this course, you will be able to create, manage, and troubleshoot highly available network services and tightly-coupled cluster storage for business-critical applications.

Students should be able to demonstrate the following skills:

• Improve application uptime by using high availability clustering.
• Manage storage in an high availability environment using iSCSI initiators, HA-LVM or LVM Shared Volume Groups as appropriate, and GFS2 cluster file systems.
• Implement strategies to identify and eliminate single points of failure in high availability clusters.

Recommended next exam or course

• Red Hat Certified Specialist in High Availability Clustering exam (EX436)
• Red Hat Services Management and Automation (RH358)
• Red Hat Enterprise Performance Tuning (RH442)

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

• 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.

Technology considerations 

• Internet access is required.

• 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.