Bug 1314037

Description of problem:
I'm attempting to install F23 on top of an existing dmraid/LVM structure by adding new LVs to the existing VG (something I've been doing for Fedora "upgrades" for quite awhile now).  The HD structure looks like so:

sda1/sdb1: swap
sda2/sdb2: md0, /boot
sda3/sdb3: md1, with an LVM PV on top, containing an "arrakis" VG, and LVs for /, /var, etc...

The Anaconda GUI lets me select things and set them up as I want using custom partitioning, and when I hit "Done" on that screen, everything looks fine - when I review the list of disk changes, there's just some reformatting of the swap partitions, and a handful of new LVs getting created inside my already-existing VG.

When I proceed with the installation, though, it ends up failing.  Sometime inbetween when I configured my partitioning and it went to do the actual work, the install image seems to have "forgotten" how to talk to the existing LVM structure, and the error that Anaconda can't find the "arrakis" VG.

When I investigate on the Anaconda commandline, it's true that it can't seem to see the LVM structure anymore, even a "pvscan" returns nothing.  I did try getting fancier with something I saw in the logs, namely:

   lvm pvs --config 'devices { preferred_names=["/dev/md/"] }'

... under the thought that maybe it didn't know to look for RAID devices somehow, but that didn't work either.

What DOES make the LVM environment show up in the anaconda commandline, though, is if I run the following:

   pvscan --cache --activate ay

Once I've done that, I can pvscan/vgscan/lvscan to my heart's content, and see all the old partitions and stuff that I'd expect.  Of course, by this time the install has failed, though, so I'm sort of stuck there.

I'll upload any extra information this report omitted once I'm back on a usual desktop.

Version-Release number of selected component:
anaconda-23.19.10-1

The following was filed automatically by anaconda:
anaconda 23.19.10-1 exception report
Traceback (most recent call first):
  File "/usr/lib64/python3.4/site-packages/gi/overrides/BlockDev.py", line 416, in wrapped
    raise transform[1](msg)
  File "/usr/lib/python3.4/site-packages/blivet/devices/lvm.py", line 746, in _create
    blockdev.lvm.lvcreate(self.vg.name, self._name, self.size)
  File "/usr/lib/python3.4/site-packages/blivet/devices/storage.py", line 455, in create
    self._create()
  File "/usr/lib/python3.4/site-packages/blivet/deviceaction.py", line 312, in execute
    self.device.create()
  File "/usr/lib/python3.4/site-packages/blivet/actionlist.py", line 280, in process
    action.execute(callbacks)
  File "/usr/lib/python3.4/site-packages/blivet/devicetree.py", line 380, in processActions
    callbacks=callbacks)
  File "/usr/lib/python3.4/site-packages/blivet/blivet.py", line 164, in doIt
    self.devicetree.processActions(callbacks=callbacks)
  File "/usr/lib/python3.4/site-packages/blivet/osinstall.py", line 1096, in turnOnFilesystems
    storage.doIt(callbacks)
  File "/usr/lib64/python3.4/site-packages/pyanaconda/install.py", line 195, in doInstall
    turnOnFilesystems(storage, mountOnly=flags.flags.dirInstall, callbacks=callbacks_reg)
  File "/usr/lib64/python3.4/threading.py", line 868, in run
    self._target(*self._args, **self._kwargs)
  File "/usr/lib64/python3.4/site-packages/pyanaconda/threads.py", line 253, in run
    threading.Thread.run(self, *args, **kwargs)
gi.overrides.BlockDev.LVMError: Process reported exit code 1280:   Volume group "arrakis" not found


Additional info:
addons:         com_redhat_kdump
cmdline:        /usr/bin/python3  /sbin/anaconda
cmdline_file:   BOOT_IMAGE=vmlinuz initrd=initrd.img inst.stage2=hd:LABEL=Fedora-S-23-x86_64 rd.live.check quiet
dnf.rpm.log:    Mar 02 18:21:07 INFO --- logging initialized ---
executable:     /sbin/anaconda
hashmarkername: anaconda
kernel:         4.2.3-300.fc23.x86_64
product:        Fedora
release:        Cannot get release name.
type:           anaconda
version:        23