Add testcloud provisioner

[thrix]

This MR adds provisioning of qcow2 images via testcloud.

To test with a qcow2 from url:

tmt run -a provision -h testcloud --image https://kojipkgs.fedoraproject.org/compose/branched/latest-Fedora-32/compose/Cloud/x86_64/images/Fedora-Cloud-Base-32-20200301.n.0.x86_64.qcow2

To test with a local qcow2:

tmt run -a provision -h testcloud --image file:///home/user/fedora.qcow2

To test with latest Rawhide:

tmt run -a provision -h testcloud --image fedora
tmt run -a provision -h testcloud --image rawhide
tmt run -a provision -h testcloud --image fedora-rawhide

Other mappings will come later, as it is a bit PITA to do ....

Signed-off-by: Miroslav Vadkerti mvadkert@redhat.com

[thrix]

Note that testcloud will print on stdout information about formatting the VM disk, here is a patch for that for testcloud:
https://pagure.io/testcloud/pull-request/61

[psss]

Import fails:

>>> import tmt
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "/home/psss/git/tmt/tmt/__init__.py", line 3, in <module>
    from tmt.base import Tree, Test, Plan, Story, Run
File "/home/psss/git/tmt/tmt/base.py", line 15, in <module>
    import tmt.steps.provision
File "/home/psss/git/tmt/tmt/steps/provision/__init__.py", line 11, in <module>
    from tmt.steps.provision import vagrant, localhost, podman, testcloud
File "/home/psss/git/tmt/tmt/steps/provision/testcloud.py", line 5, in <module>
    import testcloud.image
ModuleNotFoundError: No module named 'testcloud'

Perhaps forgotten BuildRequires in the pull request?

[psss]

Seems the StrictHostKeyChecking should be added to rsync commands as well:

Warning: remote host identification has changed!
Failed to run command 'rsync -Rvaze "ssh -i ...

[psss]

Or shall we include -o UserKnownHostsFile=/dev/null in the ssh options as well?

[thrix]

@psss all should be fixed, waiting for ssh to be available was added ... options needed for seamless connection via ssh added to everyting ...

Kindly asking for next round of review

[psss]

Nice, thanks! The ssh retry fixed the connection problem. One last thing: Perhaps we should remove -v from rsync. I don't think it's necessary to print all synced files on the output.

[thrix]

Nice, thanks! The ssh retry fixed the connection problem. One last thing: Perhaps we should remove -v from rsync. I don't think it's necessary to print all synced files on the output.

ok

[thrix]

@psss done

This is already fixed ... not able to resolve it ....

[psss]

Nice, works now for all tmt plans. Thanks for all the fixes!