Linux High Availability Clustering on Veritas Cluster Server

Navigate to centos.org, select CentOS Linux version seven 1908 ISO for x86_64 from nearby mirrors, download the dvd 2003 ISO, and save it in Finder for VirtualBox.

Create a virtual machine shell in VirtualBox for a CentOS 7 server, allocate 2 GB RAM, 15 GB disk, and mount the CentOS 7 ISO via the storage settings.

Install CentOS 7 on a virtual machine by booting from the ISO, selecting the 15 gb disk, and setting the root password to log into the deployed server.

Learn how to deploy a second node for a Linux high availability cluster by cloning a CentOS 7 server, renaming to node one and node two, generating new Mac addresses.

Create and map shared disk volumes to node one and node two in a Veritas cluster, making each volume fixed-size, shareable, and attached via the storage controller.

Assign bridged primary adapters on node one and node two, and configure two internal adapters per node for heartbeat connections to support failover in the Veritas cluster server.

Power on node1 and node2, verify both are online, log in as root on CentOS 7, and confirm the previously configured shared disks and heartbeat network adapters.

Assigns the primary IP on node one and configures private heartbeat networks for a Veritas cluster server. Edits ifcfg files, sets static IPs (10.0.0.100, 192.168.0.101, 192.168.0.102), and validates connectivity.

Configure the primary and private IPs on node two by editing ifcfg files and enabling on boot; bring up the interfaces and test with pings.

Change each node's host name from local host to node one and node two using the host name command, then verify on subsequent logins.

Access nodes via mac terminal using ssh to node one at 10.0.0.100, accept the host key, enter the root password, then connect to node two at 10.0.0.200.

Update the Etsy hosts file on node one and node two by hardcoding the IP addresses 10.0.0.100 and 10.0.0.200 with their hostnames.

update the resolv.conf file on node one and node two to hardcode the gateway 10.0.0.1 as the nameserver, then verify DNS by pinging google.com.

Download veritas info skill 7.4.2 centos tar file by completing the 60-day trial form, then locate and save it from downloads to the CentOS server.

Copy the Veritas info skill software to VCS node1 using scp, then verify the transfer by ssh and listing the target directory.

Decompress the Veritas software tarball by gunzipping the .gz file and untar it, then verify the extracted contents with a directory listing.

Run the Veritas cluster server installer, perform pre checks for storage foundation and high availability, set up passwordless ssh between nodes, and install missing rpm with yum.

Install Veritas InfoScale Enterprise software across node one and node two, following an installer script, performing pre-checks, and enabling a 60-day trial with keyless licensing.

Configure a two-node Veritas Info Scale Enterprise cluster using the installation wizard, enabling storage foundation and high availability, IO fencing, heartbeat links, and a service group with a public IP.

Check the VCS cluster status using bin commands, confirm the cluster service is online on node one, and ensure the service group IP will fail over to node two.

Add the Veritas cluster server bin path to bash profile to export the vcs command path, enabling you to run vcs commands without typing the full path on both nodes.

Remove the default service group in a two-node Veritas cluster server by inspecting the main configuration, deleting dependencies and the service group, and verifying the cluster status.

Create a new service group SG one in the ecs cluster, add node one and node two to its system list, and set autostart order.

Assign an ip resource to service group sg1, attach it to the primary nic (emp 0s3), and enforce a dependency so the ip comes online after the nic.

Initialize the shared storage volumes for the Veritas cluster server, verify they show online on both nodes, and enable Veritas disk control to maintain access.

Create a disk group on a shared disk volume, name the group, assign the first disk, and verify the group's online status on both nodes using vcs disk space list.

Add disk group, logical volume, and file system under VCS control to achieve high availability across nodes; create dependencies and enable resources in service group SG one.

Perform a failover test of a service group on Veritas Cluster Server, migrating SG one from node one to node two and verifying the mount point /test vxfs remains online.