How to Set Up vMotion and High Availability (HA) in VMware vCenter

Open a web browser and navigate to the server's IP address.

Login Credentials

• Username: administrator@domain (e.g., administrator@gynlam328.com)
• Password: Use the secure password defined during your initial setup

Step A: Create a vSphere Datacenter

The Datacenter is the top-level logical container used to centrally manage all your ESXi nodes. In a real-world business scenario, this typically represents a physical office location or branch (e.g., PROD-UK01, LAB-01).

1. Right-click your main vCenter instance and select New Datacenter.
2. Provide a descriptive name (e.g., LAB-01).

Step B: Create and Configure the ESXi Cluster

A Cluster allows you to pool the hardware resources of multiple physical hosts.

1. Right-click your newly created Datacenter and select New Cluster.
2. Provide a name for the cluster (e.g., LAB-01-Cluster).
3. Important: Ensure you enable both vSphere DRS and vSphere HA at this stage to allow for automated load balancing and high availability.

Step C: Add ESXi Hosts to the Cluster

Bring physical compute power into your logical cluster.

1. Right-click the Cluster and select Add Hosts.
2. Enter the IP addresses of your target ESXi hosts (e.g., 192.168.231.161, 192.168.231.162).
3. Check the box for "Use the same credentials for all hosts" if applicable, and enter your root credentials.

For VMware live migration to function properly, the vMotion service must be enabled on the VMkernel adapters across ALL hosts in the cluster.

1. Select your ESXi host, navigate to Configure > Networking > VMkernel adapters.
2. Select the appropriate adapter (typically vmk0) and click Edit.
3. Check the box for vMotion under the Enabled services section.
4. Repeat this critical step for all hosts within the cluster.

Upload ISO & Create the Virtual Machine

1. Navigate to the Datastores tab and select your configured Shared Storage (e.g., TrueNAS-iSCSI).
2. Go to the Files tab and upload your desired OS ISO (e.g., Ubuntu Server).
3. Create a new VM on your primary ESXi host. Crucial: Ensure you select the shared storage location (e.g., TrueNAS) for the VM's files.

1. Power on the Ubuntu VM, install the operating system, and log in.
2. Open a terminal (or CMD on your local PC) and initiate a continuous ping to monitor connectivity: ping [VM-IP] -t.
3. In vCenter, right-click the target VM and select Migrate.
4. Select Change compute resource only (since the underlying storage is already shared).
5. Select the Destination Host (your secondary ESXi host).
6. Finish the wizard and observe the continuous ping results.

Result Analysis

During the live migration, you should experience almost no packet loss (typically 0 or 1 dropped packet). The end-user experience remains completely uninterrupted.

1. Ensure the virtual machine is actively running on Host 2.
2. Simulate Failure: Perform a hard power-off on Host 2 (via physical power button or baseboard management controller).
3. Observe the vCenter console: Host 2 will eventually show a red alert stating Not Responding.
4. The continuous ping will time out significantly. This is expected, as the VM has effectively crashed alongside the host.

The HA Recovery Process

Within a few minutes, vSphere HA will detect the host failure. You can monitor the automated recovery in Monitor > Tasks and Events. Look for the system log: "vSphere HA restarted virtual machine..."