Hello,

In CentOS 7 default filesystem in anaconda was xfs, but in ovirt node ng 4.3.9 (based on CentOS 7) the default layout was set to ext4.

In CentOS 8 again the default is xfs and I see that ovirt node ng 4.4 beta4 (based on CentOS 8.1) has now xfs for all filesystems, excluded /boot that is set to ext4.

In general I have a preference for ext4.

I notice that while in 4.3.9 I could somehow customize partition layout, even if not recommended, in 4.4 I always get error if I don't accept automatic partitioning.

What I sometimes do:

- select disk and custom layout

- click done and the storage page appears

- I click the button to create automatically and I get the automatic partitioning layout

- and here I can change fs type and update settings button and/or change size of some filesystems (eg for /var/log if using Gluster)

Even if I only set all filesystems automatically generated by installer to ext4, without changing any size, in the final stage of installation I get this error and installation aborts:

"

There was an error running the kickstart script at line 5.  This is a fatal error and installation will be aborted.  The details of this error are:

2020-04-19 10:37:50,451 [INFO] (MainThread) Trying to create a manageable base from '/'
2020-04-19 10:37:50,811 [ERROR] (MainThread) LVM Thin Provisioning partitioning scheme is required.
For autoinstall via Kickstart with LVM Thin Provisioning check options: --thinpool and --grow. Please consult documentation for details

Traceback (most recent call last):
  File "/usr/lib64/python3.6/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib64/python3.6/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3.6/site-packages/imgbased/__main__.py", line 53, in <module>
    CliApplication()
  File "/usr/lib/python3.6/site-packages/imgbased/__init__.py", line 82, in CliApplication
    app.hooks.emit("post-arg-parse", args)
  File "/usr/lib/python3.6/site-packages/imgbased/hooks.py", line 120, in emit
    cb(self.context, *args)
  File "/usr/lib/python3.6/site-packages/imgbased/plugins/core.py", line 171, in post_argparse
    layout.initialize(args.source, args.init_nvr)
  File "/usr/lib/python3.6/site-packages/imgbased/plugins/core.py", line 215, in initialize
    self.app.imgbase.init_layout_from(source, init_nvr)
  File "/usr/lib/python3.6/site-packages/imgbased/imgbase.py", line 293, in init_layout_from
    self.init_tags_on(existing_lv)
  File "/usr/lib/python3.6/site-packages/imgbased/imgbase.py", line 271, in init_tags_on
    pool = lv.thinpool()
  File "/usr/lib/python3.6/site-packages/imgbased/lvm.py", line 305, in thinpool
    raise MissingLvmThinPool()
imgbased.lvm.MissingLvmThinPool

"

If I change nothing and choose automatic partitioning the installation completes.

Tried different times with same results.

Is it expected? In this case instead of specifying "recommended" it should be written sort of "mandatory"...

Gianluca

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