Linux High Availability Clustering on RHEL 8

Learn the hardware and software requirements to build a Linux high availability cluster on RHEL 8, including virtualization with a hypervisor, VM cluster setup, lab network design, and storage connectivity.

Install VMware Workstation on a Windows host, navigate common setup errors, and complete the installation across Windows versions such as 10, 7, and 2000, with extra update steps.

Practice lab demonstrates installing VMware vspare on nested VMware Workstation, creating and configuring a virtual machine, performing the installation, accepting licenses, setting root password, and rebooting to complete the setup.

Configure three lan segments in VMware workstation to support a Linux high-availability cluster on RHEL 8, using network adapters for a public network and a storage network.

Set a static IP on ESXi by configuring the IP address, subnet mask, gateway, and DNS, then reboot to apply the network settings and verify connectivity.

Install Red Hat Enterprise Linux 8 on a new virtual machine, configuring memory, storage, network, and hostname. Set time and language, and install workstation packages to enable graphical user interfaces.

Connect and configure multiple networks for a multi-node cluster by assigning IP addresses, setting up storage and public networks, and validating connectivity between node machines.

Configure dnf or yum and set up a RHEL 8 repository server for high-availability packages, install and enable services, and manage remote and public zone access for resilient clustering.

Set up a high availability repository on CentOS 8 from the internet, enable the repository, and install high availability cluster packages such as pacemaker using dnf.

Download high availability cluster packages from the higher reliability repository. Move pacemaker packages to your repo server and set up the repository to install cluster packages on every machine.

Set up passwordless SSH login across all nodes by generating an RSA key pair, distributing the public key to each node, and verifying password-free access.

Learn to create a basic high-availability cluster on rhel 8 by installing packages, configuring the cluster synchronization service, authenticating nodes, and starting a named cluster with pacemaker and crm.

Set up a three-node high-availability cluster on RHEL 8 using Pacemaker, configuring hostnames, installing necessary packages, enabling and starting services, and validating cluster status.

Manage cluster nodes in Linux high availability by starting or stopping services, adding or removing nodes, and testing resource migration with standby mode.

Add and remove a cluster node in Red Hat Enterprise Linux 8 high availability cluster, authenticate the node, start services, and verify cluster status throughout.

Explore how cluster quorum governs operation by tracking node status and votes. It defines minimum votes needed for the cluster to run and stops when below quorum, protecting shared data.

Manage quorum and service control in a Red Hat Enterprise Linux 8 high availability cluster by simulating node failures, observing quorum status, and ensuring the last man standing maintains operation.

Practice learning how to stop and start cluster services, verify quorum status, and maintain a running Linux high-availability cluster on RHEL 8.

Explore Linux high availability clustering on RHEL 8 by implementing last man standing and auto tie breaker to maintain quorum and manage cluster startup, status, and coalescing.

In this practice lab, learners configure and manage a Linux high availability cluster on RHEL 8, verify quorum, start and stop cluster services, and check cluster status across nodes.

Explore the results and conclusions of Linux high availability clustering on RHEL 8, and understand strategies for reliability, failover, and cluster management.

Configure a two-node cluster on RHEL 8 by setting quorum properties, starting and stopping cluster services, and verifying quorum status for an operational cluster.

Explore how constraints shape resource behavior in a Linux high availability cluster on RHEL 8, focusing on location constraints, order constraints, three constants, and enabling or disabling groups.

practice session on constraints, groups, and property sets in a rhel 8 cluster, creating virtual IP resources, forming resource groups, and configuring location constraints to control where resources run.

Explore fencing theory in Red Hat Enterprise Linux 8, including quorum, power fencing, and how node isolation preserves data integrity and access to storage.

Learn to configure fencing in a Linux high availability cluster, mapping and managing VM pins, setting static IP addresses, and validating cluster status across multiple nodes.

Configure iSCSI target and initiator on Linux by discovering targets, authenticating, logging in, and mounting back-end block storage via target portals, ACLs, and portal groups.

Learn multipath theory to optimize input/output for storage area networks by aggregating paths into a single device map.

Practice multipath setup for Linux high availability clustering by linking data and storage networks across nodes, configuring initiator and target, enabling multipath, and verifying device status.

Explore how Linux high availability clustering on RHEL 8 uses pacemaker and resource agents to monitor, group, and failover resources like IP addresses and services.

Master the hands-on process of creating and managing cluster resources on RHEL 8, using pacemaker and resource agents, heartbeat, and troubleshooting with pcs to move, update, and delete resources.

Discover the steps to configure nfs in a RHEL 8 high availability cluster, including installing required packages, enabling services, creating shared partitions, and mounting resources across nodes.

Learn to install and configure iSCSI target and initiator on RHEL 8, create block storage, set ACLs, start services, and perform discovery and login to establish shared storage.

Install and configure NFS in a Linux high-availability clustering setup on RHEL 8, covering node preparation, service management, partitioning, and shared resources across the cluster.

Explore active-passive high availability clustering on Red Hat Enterprise Linux 8, focusing on ext3, ext4, and xfs filesystems, shared storage, and resource configuration across cluster nodes.

Create an lvm with an attached systemid by forming a volume group and a logical volume, configure shared disks across nodes, and activate the resources.

Configure an active-passive high-availability NFS cluster on RHEL 8 by installing and enabling resources across nodes, setting a virtual IP, mounting NFS shares, and validating failover.

Install cluster-wide packages on all nodes, configure Apache with server-status for active-passive high availability on RHEL 8, and enable PCS resources and firewall rules.

Learn to install and configure Apache in a Linux high-availability cluster on RHEL 8 by installing packages, starting services, creating resources and groups, and validating cluster status across nodes.