[Bug 1570580] Re: Existing Logical Volumes on multipathed SCSI disks are not automatically activated during installation

[Dimitri John Ledkov]

This is conflict with previous bug reports. So originally / earlier in
xenial release cycle we were shipping udev rules to automatically
activate all discovered LVM groups and volumes. This then resulted in
disk drives to be already in use, and failure to e.g. dasdfmt a dasd
drive. There was no way to deactivate existing bug reports. My
understanding was that there is / was a d-i way to pressed or activate
all the available volume groups, I shall double check that. At the
moment, I am inclined to say it is more important to keep the use-case
"wipe any old install, install with new partitioning layouts", where old
install may or may not have lvm based installation.

Are you performing manual installations, or are you preseeding automated
installations and want to reuse lvm groups/volumes? If you are
automating this advance setup I highly recommend to add relevant shell
commands in partman/early_command as described in the installation guide
at https://help.ubuntu.com/16.04/installation-guide/s390x/apbs05.html
#preseed-hooks

Why is this bug report filed at severity-high? Has hws signed-off on
this? "bugproxy" is not really authorised to open bug reports at
severity high, they should be escalated to high, via PM coordination
between hws and lou.

We are effectively past final freeze now, thus everything from now on
should be filed as targetmilestone-inin1610, with expectation that it
can only be SRUed into xenial.

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https://bugs.launchpad.net/bugs/1570580

Title:
  Existing Logical Volumes on multipathed SCSI disks are not
  automatically activated during installation

Status in debian-installer package in Ubuntu:
  New

Bug description:
  Installer version: 447
  Kernel: 4.4.0.18
  Description/Reproduction:
  Logical Volumes that exist on multipathed SCSI disks from a previous installation are not automatically activated and thus can not be reused. Only the partitions are visible and that their type is "lvm" (s. screenshot). 

  Workaround:

  When the partitioned disks are shown in the "Partition disks" menu,
  open a shell. Then list all logical volumes with command lvs, and set
  each logical volume active with lvchange -ay
  <volumegroupname>/<lvolname>. Choose "Configure the Logical Volume
  Manager", confirm keeping current partition layout with "Yes"  and
  "Finish" without changing anything. Then the Logical Volumes are
  displayed in the "Partition disks" menu and filesystems can be created
  and mountpoints defined.

  I will attach syslog and partman of the installation attempt.

  So obviously an lvchange -ay on all detected lolgical volumes is
  missing at the proper time....

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