Create Alpine Linux PV DomU
Obtain a copy of Alpine Linux
To create an Alpine Linux paravirtualized (PV) DomU you will need an Alpine Linux iso.
Download the latest alpine-virtgrsec iso from https://alpinelinux.org/downloads/
In this example we will use /data/ for our download and for our disk images.
Mount the ISO image
Next, mount the iso so we can read the kernel and initramfs:
Now we have the kernel in /media/cdrom/boot/vmlinuz-virtgrsec and initramfs in /media/cdrom/boot/initramfs-virtgrsec.
Alternatively you can use uniso or p7zip to extract the content to a temp area.
Create the disk image
Now we should create an empty file, that will be the hard drive of the DomU (in this example we are using a 3GB disk):
Create a DomU config file that boots the ISO image
The next step is to create a basic DomU configuration file, so we can launch the pv guest iso (save it where you like, although the most common place is /etc/xen/).
Install the guest
Now that we have all the necessary files, we can start the DomU to proceed with the install:
Login into the system with user "root" and no password.
We need disable the ext4 64bit feature since pv-grub does not support ext4. Then we proceed with the normal install:
After configuring the basic system, you will be asked where would you like to install Alpine, choose xvda and sys.
This will create three partitions on your disk, xvda1 for /boot, xvda2 for swap and xvda3 for /
Available disks are: xvda (3.1 GB ) Which disk(s) would you like to use? (or '?' for help or 'none') [none] xvda The following disk is selected: xvda (3.1 GB ) How would you like to use it? ('sys', 'data' or '?' for help) [?] sys WARNING: The following disk(s) will be erased: xvda (3.1 GB ) WARNING: Erase the above disk(s) and continue? [y/N]: y Initializing partitions on /dev/xvda... Creating file systems... Installing system on /dev/xvda3: Installation is complete. Please reboot. #
Before you reboot, mount the boot partition and create a grub/menu.lst file for pv-grub.
Unmount and power off.
Adjust the domU config file to boot from fresh install
In your Dom0, edit your DomU config file to boot with pv-grub.
Remember to unmount the loopback iso image.
When you next boot, you will be presented with the grub boot menu, and your VM will boot.