Remove or disable GFS2 Clustering in XCP-ng 7.5

[cocoon]

Describe the bug
GFS2 is not supported with XCP-NG and should be grayed out or removed for XCP-NG-Servers / Pools.
(there may be more context menus regarding these features, have not checked)

Upgrading from XCP-NG 7.5 to 7.6 with Clustering enabled will cause troubles:
xcp-ng/xcp#94

To Reproduce
Steps to reproduce the behavior:

1. Go to pool properties
2. Click on Clustering

Expected behavior
Grayed out with a hint that this is not supported.

Screenshots / Logfiles

Hard-/Software involved:

• Hardware: VMware virtual machine for testing
• Host XCP-ng Version: 7.5
• Client XCP-ng Center Version: 7.6.0.9
• Desktop OS: Windows 10 1803

Additional context

[borzel]

It should already be removed: #108

[cocoon]

I think I had a version of 7.5 that reports gfs2 support then, ... I will have to check this.

But I can say XCP-NG Center 7.6.0.9 shows that Option If I restore my 7.5 Backup.

That means it would only affect you if you install 7.5.

Haha I Just found an old comment from you and hey I can confirm it now😆

xcp-ng/xcp#70 (comment)

I would suggest to release updated 7.5 ISO and Yum repo files with fixed/removed gfs2 support.
Because there are still reasons to install 7.5, i.e. Cloud Stack only supports up to 7.5 currently. Just as an example, there could be other reasons.

[borzel]

so it's a job for @johnelse or @stormi or @olivierlambert ... I close this issue :-)

[stormi]

We won't release updated 7.5 ISOs, but I can push a patched xcp-featured to yum repos.

[olivierlambert]

LGTM

[stormi]

Follow-up: xcp-ng/xcp#94