Pre-Conversion Tasks

Before switching from HVM to PVM you should perform a system check, interface check, and system backup.

System Check

The Protegrity software appliance is installed with HVM. This means the appliance operating system does not know that it is running on a hypervisor.

To check the system:

1. Use the following Linux command to check whether the Linux kernel supports paravirtualization and examine the hypervisor.

   # dmesg | grep –i boot
   

   If the following message does not appear, then the kernel does not support paravirtualization:

   Booting paravirtualized kernel
   

   The rest of the output shows the hypervisor name, for example, Xen. If you are running on a physical hardware, or the hypervisor was not configured to use PVM, then the following output appears:

   bare hardware
   

Interface Check

The conversion tools and tasks assume that the Protegrity Appliance virtual hard disk is using the IDE interface, which is the default interface. Check that the device name used by the Linux Operating System is hda, and not sda or other devices.

System Backup

Switching from HVM to PVM requires changes in many configuration files, so it is very important to back up the system before applying the changes. Use the XenServer snapshot functionality to back up the system.

For more information about the snapshot functionality, refer to the XenServer documentation.

It is also recommended that you back up the appliance data and configuration files using the standard appliance backup mechanisms.

For more information about backing up from CLI Manager, refer here.

Managing local OS user option provides you the ability to create users that need direct OS shell access. These users are allowed to perform non-standard functions, such as schedule remote operations, backup agents, run health monitoring, etc. This option also lets you manage passwords and permissions for the dpsdbuser, which is available by default when ESA is installed.

Managing Local OS Users

This section describes the steps to manage the local OS users.

To manage local OS users:

1. Navigate to Administration > Accounts and Passwords > Manage Passwords and Local-Accounts > Manage local OS users.

2. In the dialog displayed, enter the root password and confirm selection.

3. Add a new user or select an existing user as explained in following steps.

   1. Select Add to create a new local OS user.

      1. In the dialog box displayed, enter a User name and Password for the new user. The & character is not supported in the Username field.

      2. Confirm the password in the required text boxes.

      3. Select OK and press Enter to save the user.

   2. Select an existing user from the list displayed.

      1. You can select one of the following options from the displayed menu.

      Options	Description	Procedure
      Check password	Validate entered password.	In the dialog box displayed, enter the password for the local OS user. A Validation succeeded message appears.
      Update password	Change password for the user.	In the dialog box displayed, enter the Old password for the local OS user. This step is optional. Enter the New Password and confirm it in the required text boxes.
      Update shell	Define shell access for the user.	In the dialog box displayed, select one of the following options: No login access Linux Shell - /bin/sh Custom Note: The default shell is set as No login access (/bin/false).
      Toggle SSH access	Set SSH access for the user.	Select the Toggle SSH access option and press Enter to set SSH access to Yes. Note: The default is set as No when a user is created.
      Delete user	Delete the local OS user and related home directory.	Select the Delete user option and confirm the selection.

4. Select Close to exit the option.

Backup and Restore

If you backed up the OS in HVM/PVM mode, then you will be able to restore only in the mode in which you backed it up. For more information about backing up from the Web UI, refer to section System Backup and Restore.

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