qubes-doc/managing-os/fedora-template-upgrade-23.md

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doc	Upgrading the Fedora 23 Template	/doc/fedora-template-upgrade-23/	/en/doc/fedora-template-upgrade-23/ /doc/FedoraTemplateUpgrade23/ /wiki/FedoraTemplateUpgrade23/

Upgrading the Fedora 23 Template

Summary: Upgrading the Standard Fedora 23 Template to Fedora 24

    [user@dom0 ~]$ qvm-clone fedora-23 fedora-24
    [user@dom0 ~]$ truncate -s 5GB /var/tmp/template-upgrade-cache.img
    [user@dom0 ~]$ qvm-run -a fedora-24 gnome-terminal
    [user@dom0 ~]$ qvm-block -A fedora-24 dom0:/var/tmp/template-upgrade-cache.img
    [user@fedora-24 ~]$ sudo mkfs.ext4 /dev/xvdi
    [user@fedora-24 ~]$ sudo mount /dev/xvdi /mnt/removable
    [user@fedora-24 ~]$ sudo dnf clean all
    [user@fedora-24 ~]$ sudo dnf --releasever=24 --setopt=cachedir=/mnt/removable distro-sync

(Shut down TemplateVM by any normal means.)

    [user@dom0 ~]$ rm /var/tmp/template-upgrade-cache.img
    [user@dom0 ~]$ qvm-trim-template fedora-24

(Done.)

Detailed: Upgrading the Standard Fedora 23 Template to Fedora 24

These instructions will show you how to upgrade the standard Fedora 23 TemplateVM to Fedora 24. The same general procedure may be used to upgrade any template based on the standard Fedora 23 template.

1. Ensure the existing template is not running.

   [user@dom0 ~]$ qvm-shutdown fedora-23
   

2. Clone the existing template and start a terminal in the new template.

   [user@dom0 ~]$ qvm-clone fedora-23 fedora-24
   [user@dom0 ~]$ qvm-run -a fedora-24 gnome-terminal
   

3. Attempt the upgrade process in the new template.

   [user@fedora-24 ~]$ sudo dnf clean all
   [user@fedora-24 ~]$ sudo dnf --releasever=24 distro-sync
   

4. Shutdown the new TemplateVM via dom0 command line or Qubes VM Manager;

   [user@dom0 ~]$ qvm-shutdown fedora-24
   

   If you encounter no errors, proceed to step 7.

5. If dnf reports that you do not have enough free disk space to proceed with the upgrade process, create an empty file in dom0 to use as a cache and attach it to the template as a virtual disk.

   [user@dom0 ~]$ truncate -s 5GB /var/tmp/template-upgrade-cache.img
   [user@dom0 ~]$ qvm-block -A fedora-24 dom0:/var/tmp/template-upgrade-cache.img
   

   Then reattempt the upgrade process, but this time using the virtual disk as a cache.

   [user@fedora-24 ~]$ sudo mkfs.ext4 /dev/xvdi
   [user@fedora-24 ~]$ sudo mount /dev/xvdi /mnt/removable
   [user@fedora-24 ~]$ sudo dnf clean all
   [user@fedora-24 ~]$ sudo dnf --releasever=24 --setopt=cachedir=/mnt/removable distro-sync
   

   (Poweroff via Qubes VM Manager. May need to be killed.)

6. dnf may complain:

   At least X MB more space needed on the / filesystem.
   

   In this case, one option is to resize the TemplateVM's disk image before reattempting the upgrade process. (See Additional Information below for other options.)

7. After the upgrade process is finished, remove the cache file, if you created one.

   [user@dom0 ~]$ rm /var/tmp/template-upgrade-cache.img
   

8. Trim the new template (see Compacting the Upgraded Template for details and other options).

   [user@dom0 ~]$ qvm-trim-template fedora-24
   

9. (Optional) Remove the old default template.

   [user@dom0 ~]$ sudo dnf remove qubes-template-fedora-23
   

Summary: Upgrading the Minimal Fedora 23 Template to Fedora 24

    [user@dom0 ~]$ qvm-clone fedora-23-minimal fedora-24-minimal
    [user@dom0 ~]$ qvm-run -a fedora-24-minimal xterm
    [user@fedora-24-minimal ~]$ su -
    [root@fedora-24-minimal ~]# dnf clean all
    [user@fedora-24-minimal ~]# dnf --releasever=24 distro-sync

(Shut down TemplateVM by any normal means.)

    [user@dom0 ~]$ qvm-trim-template fedora-24-minimal

(If you encounter insufficient space issues, you may need to use the methods described for the standard template above.)

Differences Between the Standard and Minimal Upgrade Procedures

The procedure for upgrading the minimal template (or any template based on the minimal template) is the same as the procedure for the standard template above, with the following exceptions:

1. gnome-terminal is not installed by default. Unless you've installed it (or another terminal emulator), use xterm. (Of course, you can also use xterm for the standard template, if you prefer.)
2. sudo is not installed by default. Unless you've installed it, use su as demonstrated above. (Of course, you can also use su for the standard template, if you prefer.)

Compacting the Upgraded Template

Neither fstrim nor the discard mount option works on the TemplateVM's root filesystem, so when a file is removed in the template, space is not freed in dom0. This means that the template will use about twice as much space as is really necessary after upgrading.

You can use the qvm-trim-template tool:

    [user@dom0 ~]$ qvm-trim-template fedora-24

Additional Information

As mentioned above, you may encounter the following dnf error:

At least X MB more space needed on the / filesystem.

In this case, you have several options:

1. Increase the TemplateVM's disk image size. This is the solution mentioned in the main instructions above.
2. Delete files in order to free up space. One way to do this is by uninstalling packages. You may then reinstalling them again after you finish the upgrade process, if desired). However, you may end up having to increase the disk image size anyway (see previous option).
3. Increase the root.img size with qvm-grow-root.
4. Do the upgrade in parts, e.g., by using package groups. (First upgrade @core packages, then the rest.)
5. Do not perform an in-place upgrade. Instead, simply download and install a new template package, then redo all desired template modifications.

With regard to the last option, here are some useful messages from the mailing list which also apply to TemplateVM management and migration in general:

• Marek
• Jason M