Description
This course teaches students to deploy and administer the SUSE Linux Enterprise High Availability product.
The course introduces the product features and implementation planning for both on premise and the public cloud. A SLE15 (or 12) HA cluster is deployed and then applications and clustered storage are configured, tested and administered.
This course prepares students for the SCA+ in SUSE Linux Enterprise High Availability exam.
Goals
During this course you will learn to:
- Plan and prepare to implement a SLE HA cluster
- Install SLE HA and create a Corosync/Pacemaker cluster
- Administer a cluster using Web and CLI tools
- Configure node fencing
- Cluster basic resources, such as IP addresses and services
- Provision Cluster storage
- Configure the cluster behaviour using constraints
- Perform basic cluster troubleshooting
Target
This course is designed for existing Linux administrators who want to configure highly available services using SUSE Linux Enterprise HA Extension. This course provides a foundation for deploying SAP on SLE HA.Contents
Section 1: Introduction
- Agenda
- Course Overview
- Lab Environment
Section 2: Introduction to SUSE Linux Enterprise HA
- Overview of SUSE Linux Enterprise HA
- Why Should I Consider Implementing a Cluster?
- Cluster Terminology
- An Overview of the HA Architecture
- SLE HA in Public Cloud Environments
Section 3: Cluster Implementation Requirements
- Overview of SLE15 HA Implementation Process
- Collect the Required Parameters
- Determine Expectations
- Planning Storage
- 2 Node Clusters, a Special Case
- Differences between SLE 12 and SLE 15
- Designing Test Cases
- Testing and Documentation
Section 4: Cluster Node Preparation
- Local Filesystems
- Preparing the Infrastructure
- Cluster Networking
- Bonding Configuration
- Time Synchronization
- Name Resolution
- User Management
- Software Management for the HA Environment
- Updating Cluster Nodes
Section 5: Deploy a Cluster
- Preparation Checklist
- Cluster setup step by step
- Secure Cluster Communications
Section 6: Administer the HA Cluster
- Overview of the Cluster Administration Tools
- Introduction to Hawk
- Command Line Tools
- Configure and Synchronize files with csync2
Section 7: Configure Fencing
- Understand Split Brain
- Understand Fencing
- STONITH
- Fencing using BMC
- Fencing using SBD
- Fencing in the Public Cloud
- Split brain Avoidance in 2 Node and 2+N Node Clusters
- Advanced Quorum Configuration with QNetd and QDevice
Section 8: Cluster Resources
- Introduction to Cluster Resources
- Resource Types
- Resource Agents
Section 9: Controlling Cluster Behavior using Constraints
- Introduction to Constraints
- Location Constraints
- Order Constraints
- Colocation Constraints
Section 10: Cluster Managed Storage
- Overview of Storage for a HA Cluster
- Cluster Managed Storage
- Overview of cLVM
- Overview of OCFS2
- Overview of Cluster Managed MDRAID
- DRBD
- Cluster Managed NFS
Section 11: Access Control Lists
- Using Access Control Lists
Section 12: Basic HA Troubleshooting
- General Troubleshooting
- Command Line Troubleshooting Tools
- Log Files
- Updating the Epoch
- SBD Start-up Behavior
Working with the CIB
Prerequisites
Students require a good knowledge of SLES15. Some familiarity with the basic concepts of clustering for HA would be useful but not required.Study Materials
Materials are in electronic form from SUSE.
