Test and publish template/standalonevm 3.2->4.0 migration instruction.

[marmarek]

I've realized we haven't published migration instruction for this case. While templates/standalonevms are mostly functional when imported from 3.2 backup, there is some missing functionality (for example #3906).

Here is some preliminary version: #1854 (comment)
One thing based on feedback there from @davex25 - all of this needs to be performed in root shell (sudo -s, or qvm-run -u root ... xterm), not individual sudo calls. Because you loose root access before installing qubes-vm-recommended metapackage.

[donob4n]

I have gui broken in standadlone vm's I restored from 3.2

I could get a bash from dom0 via qvm-run, I modified the sources and do an upgrade. But then I lost qrexec too.

[donob4n]

I have gui broken in standadlone vm's I restored from 3.2

I could get a bash from dom0 via qvm-run, I modified the sources and do an upgrade. But then I lost qrexec too.

[davex25]

Documentation should include a step for changing http to https in qubes repo file during the upgrade.

[davex25]

Documentation should include a step for changing http to https in qubes repo file during the upgrade.

[awokd]

Here's what we (mostly @taradiddles) came up with. If this is what you had in mind, I'll submit to qubes-doc and we can fine-tune there if needed.

[awokd]

Here's what we (mostly @taradiddles) came up with. If this is what you had in mind, I'll submit to qubes-doc and we can fine-tune there if needed.