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qubes-doc/managing-os/templates/fedora/upgrade-23-to-24.md
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Update command example (QubesOS/qubes-issues#2468)
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layout title permalink redirect_from
doc Upgrading the Fedora 23 Template to Fedora 24 /doc/template/fedora/upgrade-23-to-24/
/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

(Optional cleanup: Switch everything over to the new template and delete the old one. See instructions below for details.)

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

    Note: dnf might ask you to approve importing a new package signing key. For example, you might see a prompt like this one:

    warning: /var/cache/dnf/fedora-d02ca361e1b58501/packages/python2-babel-2.3.4-1.fc24.noarch.rpm: Header V3 RSA/SHA256 Signature, key ID 81b46521: NOKEY
Importing GPG key 0x81B46521:
 Userid     : "Fedora (24) <fedora-24-primary@fedoraproject.org>"
 Fingerprint: 5048 BDBB A5E7 76E5 47B0 9CCC 73BD E983 81B4 6521
 From       : /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-24-x86_64
Is this ok [y/N]:

    This key was already checked when it was installed (notice that the "From" line refers to a location on your local disk), so you can safely say yes to this prompt.

  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) Switch everything that was set to the old template to the new template, e.g.:

    1. Make the new template the default template (Qubes Manager --> Global settings --> Default template)
    2. Base AppVMs on the new template (Qubes Manager --> VM settings --> Template)
    3. Base the DispVM template on the new template (From dom0, issue qvm-create-default-dvm --default-template or qvm-create-default-dvm fedora-24.)

  10. (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: