Upgrade the Virtual Appliance in VMware

Upgrading the Virtual Appliance involves:

• Backing up and deleting the hard disks of the existing virtual machines.
• Deploying new virtual machines by using OVA image.
• Restoring the backup to their hard disks.
• Attaching the new hard disks to the older virtual machines

Splunk AppDynamics On-Premises Virtual Appliance provides the reference script that helps in upgrading the Virtual Appliance.

This document contains links to VMware documentation. Splunk AppDynamics makes no representation as to the accuracy of VMware documentation because VMware controls its own documentation.

Back Up the Virtual Appliance Data

Follow these to back up the Virtual Appliance data:

1. Download the Virtual Appliance upgrade OVA file from the Downloads portal.
2. Shutdown the Splunk AppDynamics, Anomaly Detection, and Cisco Secure Application services.
   

   appdcli stop secapp
   appdcli stop aiops
   appdcli stop appd
   <<Wait for pods to terminate before deleting operators>>
   appdcli stop operators

   CODE
3. Run the backup command:
   

   appdcli run backup

   CODE
   This command generates a <backup_tar> file with all the necessary data.
4. Copy and paste the backup file outside of the cluster.

Prepare to upgrade the Virtual Appliance

Complete the following steps to prepare the Virtual Appliance upgrade:

1. Power off the virtual machines that are running the Kubernetes cluster.
2. Rename the existing virtual machines to use their names for the new virtual machines.
3. Right click each virtual machine and select Edit Settings:
   1. In Virtual Hardware, expand Hard Disk 2.
   2. Note the Disk File name
      
4. Remove the data disk from the virtual machines.
   1. Right click on each virtual machine and select Edit Settings.
   2. In Virtual Hardware > Hard Disk 2, select Remove Device from the more options.
      

Upgrade the Virtual Appliance with the OVA File

Complete the following steps to upgrade the Virtual Appliance by using an OVA file:

1. Deploy three virtual machines by using the upgrade OVA file.
2. Delete the data disk of the new virtual machine:
   1. Go to Edit Settings.
   2. Select Hard Disk 2.
   3. Remove device
3. Attach the data disks of the previous virtual machines:
   1. Go to Edit Settings.
   2. Add a new device.
   3. Select Existing Hard Disk and specify the disk file name that you have noted earlier.
4. Enable VMware tools in the virtual machines to configure OVF properties.
   1. Select the Configure tab.
   2. Select vApp Options and click Edit.
   3. In Edit vApp Options > OVF Tools, select VMware Tools. See Edit OVF properties for a virtual machine.
5. Power on the new virtual machines.

Verify the Deployment Status

Verify the deployment of virtual machines:

1. Verify whether the deployment of virtual machines is successful:
   

   appdctl show boot

   CODE
    
   
   

   Ensure that the services in each node is active. If any service appears as Failed, restart that virtual machine. You might have to redeploy the virtual machine if it is still failing.

2. Create a three-node cluster:
   
   1. Run the following command in the primary node and specify the IP address of the peer nodes:
      

      appdctl cluster init <Node-2-IP> <Node-3-IP>

      CODE
   2. Run the following command to verify the node status:
      

      appdctl show cluster
      microk8s status

      CODE
      
      Ensure that the output displays the Running status as true for the nodes that are part of the cluster.
      

      Sample Output

        NODE           | ROLE  | RUNNING 
      ----------------+-------+---------
       10.0.0.1:19001 | voter | true    
       10.0.0.2:19001 | voter | true    
       10.0.0.3:19001 | voter | true  

      CODE
      

      You must re-login to the terminal if the following error appears:

      Insufficient Permissions to Access Microk8s

      CODE

Restore Data in the Virtual Appliance

1. Copy the <backup_tar> file to one of the cluster nodes that is generated earlier. See Prerequisites.
2. Run the following command to restore the persistent volumes specifications:
   

   appdcli run restore <backup_tar>

   CODE
3. Verify that the PVC are in the Bound state by running the following command:
   

   kubectl get pvc -A

   CODE
4. Start the following services:
   

   appdcli start appd [Profile]

   CODE
   
   
   1. Cisco AppDynamics Services.
   2. Anomaly Detection Service.
   3. Cisco Secure Application Service.

After the upgrade, the cluster uses the existing data disk and becomes functional.