feat: Enable GFS2 support in blivet

[vojtechtrefny]

GFS2 is supported by blivet, but the support is disabled by default so we need to enable it.

Fixes: #417

[codecov]

Codecov Report

Attention: 1 lines in your changes are missing coverage. Please review.

Comparison is base (98cd81f) 13.30% compared to head (030258d) 13.29%.

Files	Patch %	Lines
library/blivet.py	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #418      +/-   ##
==========================================
- Coverage   13.30%   13.29%   -0.01%     
==========================================
  Files           8        8              
  Lines        1781     1782       +1     
  Branches       79       79              
==========================================
  Hits          237      237              
- Misses       1544     1545       +1     

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sanity	16.54% <ø> (ø)

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[richm]

This breaks most of the tests. I've run tests on centos-9 and centos-8 and they fail with

TASK [linux-system-roles.storage : Manage the pools and volumes to match the specified state] ***
task path: /home/rmeggins/linux-system-roles/storage/tests/roles/linux-system-roles.storage/tasks/main-blivet.yml:84
...
MSG:

Failed to commit changes to disk: makes no sense to write a label when accepting default label

[vojtechtrefny]

This breaks most of the tests. I've run tests on centos-9 and centos-8 and they fail with

Sorry, should be fixed now.

[richm]

What is the relationship between fs_label and fs_type gfs2?

[vojtechtrefny]

What is the relationship between fs_label and fs_type gfs2?

I have added comment explaining this in test-verify-volume-fs.yml. The problem is that blivet doesn't support specifying label when creating GFS2 so it has to be specified with the -t option passed manually in fs_create_options which means the verification will always fail -- label is set (we get that information from lsblk), but we didn't specify label in fs_label.