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Create Fedora 25 to 26 upgrade instructions
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Andrew David Wong
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managing-os/templates/fedora/upgrade-25-to-26.md
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managing-os/templates/fedora/upgrade-25-to-26.md
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---
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layout: doc
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title: Upgrading the Fedora 25 Template to Fedora 26
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permalink: /doc/template/fedora/upgrade-25-to-26/
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redirect_from:
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- /doc/fedora-template-upgrade-25/
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- /en/doc/fedora-template-upgrade-25/
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- /doc/FedoraTemplateUpgrade25/
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- /wiki/FedoraTemplateUpgrade25/
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---
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Upgrading the Fedora 25 Template
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================================
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This instruction is about upgrading Fedora 25 to Fedora 26 template. The same
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instructions can be used to upgrade Fedora 24 to Fedora 26 - simply start with
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cloning fedora-24 instead of fedora-25.
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Summary: Upgrading the Standard Fedora 25 Template to Fedora 26
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---------------------------------------------------------------
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**Note:** The prompt on each line indicates where each command should be entered
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(`@dom0` or `@fedora-26`).
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[user@dom0 ~]$ qvm-clone fedora-25 fedora-26
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[user@dom0 ~]$ truncate -s 5GB /var/tmp/template-upgrade-cache.img
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[user@dom0 ~]$ qvm-run -a fedora-26 gnome-terminal
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[user@dom0 ~]$ qvm-block -A fedora-26 dom0:/var/tmp/template-upgrade-cache.img
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[user@fedora-26 ~]$ sudo mkfs.ext4 /dev/xvdi
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[user@fedora-26 ~]$ sudo mount /dev/xvdi /mnt/removable
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[user@fedora-26 ~]$ sudo dnf clean all
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[user@fedora-26 ~]$ sudo dnf --releasever=26 --setopt=cachedir=/mnt/removable distro-sync
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(Shut down TemplateVM by any normal means.)
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[user@dom0 ~]$ rm /var/tmp/template-upgrade-cache.img
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[user@dom0 ~]$ qvm-trim-template fedora-26
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(Optional cleanup: Switch everything over to the new template and delete the old
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one. See instructions below for details.)
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Detailed: Upgrading the Standard Fedora 25 Template to Fedora 26
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----------------------------------------------------------------
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These instructions will show you how to upgrade the standard Fedora 25
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TemplateVM to Fedora 26. The same general procedure may be used to upgrade any
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template based on the standard Fedora 25 template.
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**Note:** The command-line prompt on each line indicates where each command
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should be entered (`@dom0` or `@fedora-26`).
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1. Ensure the existing template is not running.
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[user@dom0 ~]$ qvm-shutdown fedora-25
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2. Clone the existing template and start a terminal in the new template.
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[user@dom0 ~]$ qvm-clone fedora-25 fedora-26
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[user@dom0 ~]$ qvm-run -a fedora-26 gnome-terminal
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3. Attempt the upgrade process in the new template.
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[user@fedora-26 ~]$ sudo dnf clean all
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[user@fedora-26 ~]$ sudo dnf --releasever=26 distro-sync
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**Note:** `dnf` might ask you to approve importing a new package signing
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key. For example, you might see a prompt like this one:
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warning: /var/cache/dnf/fedora-d02ca361e1b58501/packages/python2-babel-2.3.4-1.fc26.noarch.rpm: Header V3 RSA/SHA266 Signature, key ID 8fdb19c98: NOKEY
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Importing GPG key 0x81B46521:
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Userid : "Fedora (26) <fedora-26-primary@fedoraproject.org>"
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Fingerprint: C437 DCCD 558A 66A3 7D6F 4372 4089 D8F2 FDB1 9C98
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From : /etc/pki/rpm-gpg/RPM-GPG-KEY-fedora-26-x86_64
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Is this ok [y/N]:
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This key was already checked when it was installed (notice that the "From"
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line refers to a location on your local disk), so you can safely say yes to
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this prompt.
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**Note:** If you encounter no errors, proceed to step 4. If you do encounter
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errors, see the next two points first.
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* If `dnf` reports that you do not have enough free disk space to proceed
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with the upgrade process, create an empty file in dom0 to use as a cache
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and attach it to the template as a virtual disk.
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[user@dom0 ~]$ truncate -s 5GB /var/tmp/template-upgrade-cache.img
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[user@dom0 ~]$ qvm-block -A fedora-26 dom0:/var/tmp/template-upgrade-cache.img
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Then reattempt the upgrade process, but this time use the virtual disk
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as a cache.
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[user@fedora-26 ~]$ sudo mkfs.ext4 /dev/xvdi
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[user@fedora-26 ~]$ sudo mount /dev/xvdi /mnt/removable
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[user@fedora-26 ~]$ sudo dnf clean all
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[user@fedora-26 ~]$ sudo dnf --releasever=26 --setopt=cachedir=/mnt/removable distro-sync
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If this attempt is successful, proceed to step 4.
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* `dnf` may complain:
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At least X MB more space needed on the / filesystem.
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In this case, one option is to [resize the TemplateVM's disk
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image][resize-disk-image] before reattempting the upgrade process.
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(See [Additional Information] below for other options.)
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4. Shut down the new TemplateVM (from the command-line or Qubes VM Manager).
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[user@dom0 ~]$ qvm-shutdown fedora-26
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5. Remove the cache file, if you created one.
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[user@dom0 ~]$ rm /var/tmp/template-upgrade-cache.img
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6. Trim the new template (see [Compacting the Upgraded Template] for details
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and other options).
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[user@dom0 ~]$ qvm-trim-template fedora-26
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7. (Recommended) Switch everything that was set to the old template to the new
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template, e.g.:
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1. Make the new template the default template:
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Qubes Manager --> Global settings --> Default template
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2. Base AppVMs on the new template. In Qubes Manager, for each VM that is
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currently based on `fedora-25` that you would like to base on
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`fedora-26`, enter its VM settings and change the Template selection:
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Qubes Manager --> (Select a VM) --> VM settings --> Template
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3. Base the [DispVM] template on the new template.
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If you have set the new template as your default template:
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[user@dom0 ~]$ qvm-create-default-dvm --default-template
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Otherwise:
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[user@dom0 ~]$ qvm-create-default-dvm fedora-26
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8. (Optional) Remove the old template. (Make sure to type `fedora-25`, not
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`fedora-26`.)
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[user@dom0 ~]$ sudo dnf remove qubes-template-fedora-25
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Summary: Upgrading the Minimal Fedora 25 Template to Fedora 26
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--------------------------------------------------------------
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**Note:** The prompt on each line indicates where each command should be entered
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(`@dom0` or `@fedora-26`).
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[user@dom0 ~]$ qvm-clone fedora-25-minimal fedora-26-minimal
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[user@dom0 ~]$ qvm-run -a fedora-26-minimal xterm
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[user@fedora-26-minimal ~]$ su -
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[root@fedora-26-minimal ~]# dnf clean all
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[user@fedora-26-minimal ~]# dnf --releasever=26 distro-sync
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(Shut down TemplateVM by any normal means.)
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[user@dom0 ~]$ qvm-trim-template fedora-26-minimal
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(If you encounter insufficient space issues, you may need to use the methods
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described for the standard template above.)
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Differences Between the Standard and Minimal Upgrade Procedures
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---------------------------------------------------------------
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The procedure for upgrading the minimal template (or any template based on the
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minimal template) is the same as the procedure for the standard template above,
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**with the following exceptions**:
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1. `gnome-terminal` is not installed by default. Unless you've installed it
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(or another terminal emulator), use `xterm`. (Of course, you can also use
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`xterm` for the standard template, if you prefer.)
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2. `sudo` is not installed by default. Unless you've installed it, use `su` as
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demonstrated above. (Of course, you can also use `su` for the standard
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template, if you prefer.)
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Compacting the Upgraded Template
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--------------------------------
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Neither `fstrim` nor the `discard` mount option works on the TemplateVM's root
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filesystem, so when a file is removed in the template, space is not freed in
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dom0. This means that the template will use about twice as much space as is
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really necessary after upgrading.
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You can use the `qvm-trim-template` tool:
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[user@dom0 ~]$ qvm-trim-template fedora-26
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Upgrading StandaloneVMs
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-----------------------
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The procedure for upgrading a StandaloneVM from Fedora 25 to Fedora 26 is the
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same as for a TemplateVM, except that `qvm-trim-template` does not work on
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StandaloneVMs. Instead, you should run the following command inside the
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StandaloneVM in order to compact it:
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$ sudo fstrim -v -a
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Additional Information
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----------------------
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As mentioned above, you may encounter the following `dnf` error:
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At least X MB more space needed on the / filesystem.
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In this case, you have several options:
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1. [Increase the TemplateVM's disk image size][resize-disk-image].
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This is the solution mentioned in the main instructions above.
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2. Delete files in order to free up space. One way to do this is by
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uninstalling packages. You may then reinstalling them again after you
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finish the upgrade process, if desired). However, you may end up having to
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increase the disk image size anyway (see previous option).
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3. Increase the `root.img` size with `qvm-grow-root`.
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4. Do the upgrade in parts, e.g., by using package groups. (First upgrade
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`@core` packages, then the rest.)
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5. Do not perform an in-place upgrade. Instead, simply download and install a
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new template package, then redo all desired template modifications.
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With regard to the last option, here are some useful messages from the
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mailing list which also apply to TemplateVM management and migration in
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general:
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* [Marek](https://groups.google.com/d/msg/qubes-users/mCXkxlACILQ/dS1jbLRP9n8J)
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* [Jason M](https://groups.google.com/d/msg/qubes-users/mCXkxlACILQ/5PxDfI-RKAsJ)
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[resize-disk-image]: /doc/resize-disk-image/
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[Additional Information]: #additional-information
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[Compacting the Upgraded Template]: #compacting-the-upgraded-template
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[DispVM]: /doc/dispvm/
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