Xen Server Configuration
This section describes the appliance configuration files for PVM, Xen server parameters for PVM, and how to manually configuring the Xen server.
Appliance Configuration Files for PVM
The following table describes the appliance configuration files that are affected by the appliance Xen Paravirtualization tool.
| File Name | Description | HVM | PVM |
|---|---|---|---|
| /boot/grub/menu.lst | Boot Manager. The root partition is affected and the console parameters. | root=/dev/hda1 | root=/dev/xvda1 console=hvc0 xencons=hvc0 |
| /etc/fstab | Mounting table | Using the hda device name (/dev/hda1,/dev/hda2,…) | Using the xvda device-name (/dev/xvda1,…) |
| /etc/inittab | Console | tty1 | hvc0 |
Xen Server Parameters for PVM
The following settings are affected by the Appliance Paravirtualization Support Tool.
| Parameter Name | Description | HVM | PVM |
|---|---|---|---|
| HVM-boot-policy | VM parameter: boot-loader | BIOS Order | “” (empty) |
| PV-bootloader | VM Parameter: paravirtualization loader | “” (empty) | Pygrub |
| Bootable | Virtual Block Device parameter | false | “true” |
Manual Configuration of Xen Server
Use the CLI Manager to manually configure the Xen server. This section provides help for converting HVM to PVM and for converting PVM to HVM.
It is recommended that you use the Xen Paravirtualization Support Tool to switch between HVM and PVM. However, you sometimes might need to manually configure the XenServer. This section describes the commands you use to switch between the two modes.
Before you begin
It is recommended that you consult Protegrity Support before manually applying the commands. Back up your data prior to configuration changes. Read the XenServer documentation to avoid errors.
Converting HVM to PVM
To convert HVM to PVM use the following commands to convert from HVM to PVM, where NAME_OF_VM_MACHINE is the name of the virtual machine.
```
TARGET_VM_NAME="NAME_OF_VM_MACHINE"
TARGET_VM_UUID=$(xe vm-list name-label="$TARGET_VM_NAME" params=uuid --minimal)
TARGET_VM_VBD=$(xe vm-disk-list uuid=$TARGET_VM_UUID | grep -A1 VBD | tail -n 1 | cut -f2 - | sed "s/ *//g")
xe vm-param-set uuid=$TARGET_VM_UUID HVM-boot-policy=""
xe vm-param-set uuid=$TARGET_VM_UUID PV-bootloader="pygrub"
xe vbd-param-set uuid=$TARGET_VM_VBD bootable="true"
```
Converting PVM to HVM
To convert PVM to HVM use the following commands to convert from PVM to HVM, where NAME_OF_VM_MACHINE is the name of the virtual machine.
```
TARGET_VM_NAME="NAME_OF_VM_MACHINE"
TARGET_VM_UUID=$(xe vm-list name-label="$TARGET_VM_NAME" params=uuid --minimal)
TARGET_VM_VBD=$(xe vm-disk-list uuid=$TARGET_VM_UUID | grep -A1 VBD | tail -n 1 | cut -f2 - | sed "s/ *//g")
xe vm-param-set uuid=$TARGET_VM_UUID HVM-boot-policy="BIOS order"
xe vm-param-set uuid=$TARGET_VM_UUID PV-bootloader=""
xe vbd-param-set uuid=$TARGET_VM_VBD bootable="false"
```