RH436 – Red Hat High Availability Clustering

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About Course

The Red Hat High Availability Clustering course offers in-depth training on creating, managing, and troubleshooting Red Hat Clustering and RHEL HA clusters. Learners will gain a foundational understanding of cluster technologies and storage solutions, focusing on the Pacemaker-based high-availability clusters. Through this course, students will learn to maintain cluster node membership, implement quorum decision-making, and configure fencing to safeguard cluster integrity. Additionally, the course covers the creation and management of resource groups, troubleshooting clusters, and handling complex resource groups with constraints. Two-node cluster issues, iSCSI initiators, multipath storage configurations, and the use of LVM in clustered environments are also discussed. The course provides practical knowledge on GFS2, eliminating single points of failure, and culminates in a comprehensive review where students set up high-availability services and storage, preparing them to ensure service availability and business continuity in enterprise environments.

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What Will You Learn?

  • Understand the fundamentals of cluster and storage technologies to form the base of high-availability solutions.
  • Architect and implement Pacemaker-based high-availability clusters to ensure service continuity.
  • Manage cluster node membership and implement quorum decision-making processes for cluster consistency.
  • Configure fencing mechanisms to maintain cluster integrity and prevent "split-brain" scenarios.
  • Create and manage resource groups to facilitate the high availability of critical services.
  • Diagnose and troubleshoot common cluster issues to minimize downtime and service disruption.
  • Use constraints to manage complex resource groups and maintain service dependencies within the cluster.
  • Address specific challenges associated with two-node clusters, ensuring reliability even in minimal configurations.
  • Manage iSCSI initiators and configure multipath storage for redundant access to shared resources.
  • Implement and manage clustered Logical Volume Manager (LVM) and Global File System 2 (GFS2) to provide symmetric shared file systems.
  • Identify and mitigate single points of failure, enhancing the overall availability of services across the cluster.
  • Conduct a comprehensive review and hands-on setup of high-availability services and storage configurations as a capstone to the learning experience.
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