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Linux High Availability Clustering (Udemy.com)

Design and deploy a high availability cluster to provide active/passive or active/active services using HA Pacemaker

4.2
1,473 reviews

Created by: Shikhar Verma

Last updated August 2024

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What you will learn

  • Students should understand HA cluster concepts and how to manage different nodes, start/stop services
  • Creating High-Availability Clusters
  • Managing Cluster Nodes and Quorum
  • Managing Fencing
  • Creating and Configuring Resources
  • Managing Constraints
  • About Order, Location & Colocation Constraints
  • Troubleshooting High-Availability Clusters
  • Controlling Complex Resource groups
  • Managing Two Node Clusters
  • Concept about Split Brain, Fence death/fence racing
  • Managing iSCSI Initiators
  • Configuring & Managing High-Availability Logical Volumes
  • Managing Clustered Logical Volumes
  • GFS2 Concepts
  • Creating a GFS2 formatted Cluster File Systems
  • Growing & Repairing a GFS2 File System

How it compares

Against the other 848 rated Udemy courses in IT Certifications on CourseDuck:

  • Rating4.2 out of 5higher than 10% of them
  • Reviews1,473#223 of 849 by number of reviews
  • Length6.7 hoursshorter than 58% of them
  • Last updatedAugust 2024earlier than 77% of them

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Course Description

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:


Introduction

  • What is clustering & cluster types?

  • Advantages of Clustering Servers

  • Concepts and techniques

  • Resource and resource groups

  • Failover, Fencing, Shared Storage, Quorum

  • Cluster Architecture

  • Lab Setup using KVM Environment

  • Configuring a Basic Cluster

  • Configuring a fencing agent using KVM host mahcine

  • Troubleshooting fencing device


Managing Cluster Nodes

  • Starting & Stopping Cluster Services

  • Enabling & Disabling the Cluster Services

  • Adding & Removing A Cluster Node

  • The Standby & unstandby Nodes

  • Quorum Operations

  • Lab Session on quorum

  • Managing Quorum Calculations

  • Cluster Setup Switches

    1) wait_for_all

    2) auto_tie_breaker


Creating and Configuring Resources

  • Create and configure high-availability resources.

  • Creating a clustered Apache service

  • Managing Resources


Troubleshooting High-Availability Cluster

  • Inspect and configure cluster logging

  • Troubleshooting resource failures

  • Troubleshooting cluster network issues


Complex Resource Group

  • Configuring an Active/Passive NFS Resource Group

  • Lab Session


Managing Constraints

  • Types of constraints:

  • Order, Location & Colocation Constraint

  • Practice Lab Session


Two Node Cluster Issues

  • No room for node failure

  • Split Brain

  • Fence death/fence racing

  • The cluster does not start until both nodes have started.

  • Practice Lab Session


Managing iSCSI Initiators

  • iSCSI fundamentals

  • Configuring an iSCSI Server

  • Several types of backing Storage

  • block, fileio, pscsi & ramdisk

  • Creating iSCSI Target

  • Lab Session to create a block backstore from the targetcli shell


Managing High Availability Logical Volumes

  • Clustered LVM & HA-LVM

  • Lab Session to shared a disk (lun) to all cluster nodes

  • Practice Lab Session on HA-LVM


Managing Clustered Logical Volumes

  • Active/Active configuration of logical volumes

  • Distributed Lock Manager (DLM) for lock management

  • clvmd daemon

  • Practice Lab Session


Global File System 2 (GFS2)

  • GFS2 concepts

  • Creating a GFS2 formatted Cluster File Systems

  • Managing a GFS2 File System

  • Managing a GFS2 Resource in the cluster

  • Growing & Repairing a GFS2 File System
Read More Intermediate Intermediate Level product length iconTime: 6.7h

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Instructor Details

Shikhar Verma

Shikhar Verma – Entrepreneur, Corporate Trainer, and IT Consultant


●Founder & CEO of Techstart – Leads an IT company specializing in designing, developing certified courses, content creation, and managing online/offline IT projects for renowned companies.

●15+ Years of Industry Experience – Worked extensively in the IT sector before establishing his own business, bringing deep expertise in technology and corporate training.

●Passionate About Technology & Education – Dedicated to utilizing his technical skills to drive both organizational success and personal career growth.

●Renowned Udemy Instructor – Simplifies complex technical concepts and delivers them in an engaging and approachable manner.

●Educating Since 2016 – Taught over 100,000 students worldwide across multiple learning platforms.

●Educational Background – Holds a BTech in Electrical and Electronics Engineering.


●Core Expertise:

☆Generative AI, Python, DevOps, Docker, Git, Kubernetes, Linux, Ansible, Shell Scripting

☁️ AWS Cloud (Amazon Web Services), Linux Clustering, GCP

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Reviews

4.2

1,473 ratings on Udemy

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By Elisha Lai on 6/27/2023

Not bad. Accent was a bit difficult to understand at times + the transcript was not transcribing consistently. Sections 9, 10 and 11 can be a bit more organised as well. Overall good course for beginners like me. Thanks!

By Aakash M on 4/17/2023

The course needs to be updated \ While started following your course and performing practicals on it. I saw that version of the packages that we need to install got upgraded and with that, some of the commands and concepts are also modified/updated. Please check and update it on this course. It will help in understanding this course more clearly/completely. Last updated on Nov 2022. Thanks.

By Hyderali Syed on 9/10/2022

I really think that this has helped me to understand cluster .Good course. Need to have some Linux admin experience to really understand the concept. Since I am in linux for last 3 years most of the lectures made sense to me. Overall Good. Thankq.

By Tommy TBones Cramer on 4/24/2022

I learned how to configure cluster servers although I was hoping I could use this on my Plesk servers but Plesk will not support this. When and if I ever use a dedicated database server I will come back to this course to review how to set up a database cluster. Thank you I learned

By Ted Swoyer on 10/6/2019

Good course and instructor. Labs are good application of course materials. I took half start off because some labs assume a reset of the cluster and this gave me trouble some times. If these are the topics you want to know, I recommend this course.

By Skinni Zio on 7/17/2019

Thumbs up!!!!! I would recommend this course to any one who wants to have a deep understanding of the pacemaker/Linux HA clustering. what I love most about the course is the clear explanation of the different cluster components, the role the play and how they interact with one another

By Ragupathi C on 6/5/2019

In this course few concepts are missed. I have already raised the questions. But I did not get the proper Answer from the instructor. If he clearifies then the course will help somehow to move forward.

By Michael Rowen on 5/24/2019

I was completely pleased to see you do both HA LVM and Cluster LVM setups. Seeing complete lab examples made it understandable. Sometimes a good example is what is required to complete one's knowledge. Thanks!

By Thamizharasan on 5/8/2019

Best course ! we can gain more knowledge. The way he teaching was excellent .everyone can understand and make use of it. Spending time for the course is most valuable . Once Again thanks for your efforts . Your master ! Keep rocking !!

By Nagha on 4/14/2019

It was a pleasure to be part of this course. The instructor is proactive. All my concerns were taken care of. I am so happy to be a Red Hat certified specialist in high availability. My results are enclosed below: Dear Pierre Nagha: The results of your recent EX436 Red Hat Certified Specialist in High Availability Clustering Exam are reported below. Exam domain number: 11 Passing score: 210 Your score: 279 Result: PASS Congratulations -- you have earned the Red Hat Certified Specialist in High Availability Clustering certification. Performance on exam objectives: OBJECTIVE: SCORE High Availability Cluster Installation and Configuration: 100% High Availability Services Configuration: 71% GFS File System Configuration: 100% iSCSI and Multipath Configuration: 100% Cluster Logging and Monitoring Configuration: 100%

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Overall Score : 84 / 100

Linux High Availability Clustering
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  • Video Duration: icon 6.7h
  • Price: See price on Udemy
  • Provider: icon Udemy
  • Updated: icon August 2024
  • Level: Intermediate Intermediate
  • Language: icon English
  • Certificate: icon Yes
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