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[Chris Friesen <chris.friesen@xxxxxxxxxxxxx>]

Public bug reported:

When using an older microversion (2.25 or earlier) with boot-from-image,
and the user forgets to specify block-migration, the error message
returned is this:

"Live migration can not be used without shared storage except a booted
from volume VM which does not have a local disk."

This has a couple things wrong with it. First, the triple-negative is a
bit confusing, especially for non-native-english speakers.  Second, it
implies that you cannot do a block migration, which is obviously false.

I think a more clear error message would be something like:

"Shared storage migration requires either shared storage or boot-from-
volume with no local disks."

** Affects: nova
     Importance: Undecided
     Assignee: Chris Friesen (cbf123)
         Status: In Progress


** Tags: compute

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https://bugs.launchpad.net/bugs/1690890

Title:
  error message not clear for shared live migration with block storage

Status in OpenStack Compute (nova):
  In Progress

Bug description:
  When using an older microversion (2.25 or earlier) with boot-from-
  image, and the user forgets to specify block-migration, the error
  message returned is this:

  "Live migration can not be used without shared storage except a booted
  from volume VM which does not have a local disk."

  This has a couple things wrong with it. First, the triple-negative is
  a bit confusing, especially for non-native-english speakers.  Second,
  it implies that you cannot do a block migration, which is obviously
  false.

  I think a more clear error message would be something like:

  "Shared storage migration requires either shared storage or boot-from-
  volume with no local disks."

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