Sunday, December 17, 2017

Upgrade to XenServer 7.3

Upgrade to XenServer 7.3
// Xen Orchestra

Upgrade to XenServer 7.3

XenServer 7.3 is now available. Let's see how to upgrade (or update!) it.

Some free features are removed in 7.3. Please read this before upgrading.

Xen Orchestra is 100% compatible with XenServer 7.3.

From XenServer 7.2

If you are running XenServer 7.2, the process will be only an update, not an upgrade.

You need to download the update "pack". You can do it directly from your pool master:

$ wget  

Then, still on your pool master, you can deploy the update:

$ xe-install-supplemental-pack XenServer-7.3.0-update.iso  

From older XenServer

This is the standard upgrade procedure. You can upgrade your previous XenServer version directly to 7.3 since XenServer 6.2, 6.5, 7.0 and 7.1.

If you are using XenServer 7.2, please read the previous section.

ISO download

You can fetch the ISO here:

The ISO can be burn to a CD but see the next section for USB install.

Install from USB

From any Unix/Linux:

dd if=XenServer-7.3.0-install-cd.iso of=/dev/sdX bs=8M status=progress oflag=direct  

Replace sdX with the name of your USB key.

On Windows, use a dedicated program that can write ISO to USB drives.


It's exactly the same as all previous XenServer 7.x version (see our previous blog post: upgrade to XenServer 7.1):

  • / (root) 18GB
  • /boot/efi 512M
  • /var/log 4GB
  • Swap 1GB

Are you upgrading from an older version than XenServer 7.0? Or do you have the old partition scheme? Please follow instructions in our previous blog post to switch to the new one.

Rolling pool upgrade

If you have a pool with multiple hosts, there is some basic rules to follow:

Always upgrade the pool master first:

  1. Migrate VMs from your pool master to slaves
  2. Upgrade the pool master
  3. Migrate VMs from one slave to the pool master
  4. Migrate this slave
  5. Etc.

You can always live migrate VMs from an older XenServer to a newer. The opposite IS NOT POSSIBLE.

Also, always check to empty your VM CD drives and disable HA during the operation.


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