Linux High Availability Cluster Two Real-World Project Labs

Explore data center infrastructure foundations, including active and passive data centers, clustering and failover strategies for Linux, and cross-site disaster recovery to keep production apps running.

Explore how application staging fits into DevOps, moving code from developers through staging to production with testing, UAT, and multiple environments, using Jenkins, Maven, and Ansible.

Learn linux basics and lab setup across rpm and debian bases, with ssh, file transfer, and essential commands; explore infrastructure, networking, lvm-based disk management, patching, and cloud deployment.

Explore shell terminals, focusing on bash as the go-to shell for system administration, and compare it with zsh, fish, dash, and csh, highlighting autocomplete.

Explore the linux file system hierarchy, starting from the root slash, learn how mounting new disks creates subtrees and absolute paths like /home and /tmp, and navigate with cd.

Harness the pipeline concept to chain commands, filter command output, and build precise results across Linux, Unix, and Windows terminals using grep, cat, and other commands.

Build a lab architecture for a Linux cluster high availability using VMware ESXi on a workstation. Install ESXi, create Linux and Windows nodes, and practice snapshots.

Learn why Red Hat Linux is chosen for enterprise clusters, including CentOS as a free alternative, and how OpenShift, Red Hat Satellite, and Ansible enable automation and reliable support.

Install VMware Workstation 15 on Windows to support Linux cluster high availability labs, replacing VirtualBox, and complete stage one of the setup.

Create a NAT network in the virtual network editor with the 192.168.100.0 class C subnet and dynamic DHCP. Use VMnet10 sharing on the host to connect lab VMs.

Learn to install and configure VMware ESXi, set static network IPs, bridge networking, and troubleshoot host-to-VM connectivity for Linux cluster high-availability projects.

Set up an ESXi host and install two CentOS 7 nodes for a Linux cluster with high availability; configure static IPs 192.168.1.110 and 192.168.1.120, storage, and SSH access.

Set up a two-node Linux high-availability cluster using Pacemaker and fencing, configure hosts, disable firewall for lab practice, authenticate nodes, create and enable the cluster.

Explore fencing in Linux clusters, ensuring only one active writer through shared storage and heartbeat, preventing data corruption during failover, reboot, and quorum management.

Configure fencing in a linux cluster with vmware_soap, assign two fencing agents to the nodes, and verify failover using pcs status and crm-mon.

Learn how to identify VMs inside an ESXi host using command output or the web UI, compare UUIDs for accuracy, and verify VM names for patching and cluster checks.

Master the concept of quorum in Linux clusters by examining default settings, rule of majority, and how to adjust configurations for odd versus even node counts to prevent split brain.

Learn how a quorum server in a Linux cluster monitors nodes, enforces fencing to prevent split-brain, and ensures majority consensus, with high-level setup and optional deployment.

Learn how to configure cluster quorum for odd or even node counts using auto_tie_breaker, wait_for_all, and last_man_standing settings, including practical commands to update and verify quorum.

Learn how to apply location, ordering, and co-location constraints in a two-node Linux cluster using pcs constraints to control where and when applications and services run.

Add a new server to a Linux cluster and enable fencing. Install required packages, configure the DNS/hosts setup, join the node to the three-node cluster, and validate failover.

Build a two-node Linux cluster with active-passive high availability and shared storage. Explore NFS/SAMBA exports, cluster resources, floating IP, and moving resources between nodes.

Learn how to implement a high-availability nfs cluster with active-passive failover on linux, using shared storage, lvm (vg and lv), gfs2, and ip failover for reliable multi-node access.

Set up a two-node Linux cluster with NFS storage shared via iSCSI, configure fencing, LVM volumes, and VGs, create an NFS export, and activate the cluster resources for high availability.

Explore building an active-passive Linux cluster with a floating IP, configuring NFS resources, exporting shares, and testing failover between nodes to keep services available.

Explore how gfs2 enables active-active Linux cluster storage by connecting multiple servers simultaneously, contrasting with ext4 and xfs for active-passive setups, and previewing a real-world failover website project.

Build an active-active linux cluster with 2 nodes using gfs2, lvm, dlm, and clvmd, create shared storage, configure a floating IP, and deploy a clustered Apache website.

Master Linux cluster high availability by implementing active-active and active-passive failover with pcs, managing resources, constraints, fencing, and quorum, while handling SELinux and Apache and NFS.

Learn practical commands for managing a rehl high-availability cluster with pcs, including viewing and updating resources, changing ip addresses, standby nodes, cluster status and sync, and debugging.

Connect a Cisco switch or router via a console cable using a laptop and Putty to access device in data center. Confirm serial port and use USB adapters if needed.

Learn to replace a server hard disk by identifying the correct bay, removing the old drive, and installing the new one. Verify the disk status using color indicators from green healthy to orange warning and red error, confirm the correct bay and serial number, and complete data center clearance before exiting.

Master tape library storage by changing tapes in HP StorageWorks autoloaders, including left and right magazines, weekly tape rotation, and console access via Putty and command line.

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