[Bug 1004243] Re: multipath installs not working

[Mathew Hodson]

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https://bugs.launchpad.net/bugs/1004243

Title:
  multipath installs not working

Status in “multipath-tools” package in Ubuntu:
  Fix Released
Status in “multipath-tools” source package in Precise:
  Fix Released
Status in “multipath-tools” source package in Trusty:
  Fix Released

Bug description:
  [SRU Justification]
  multipath no workie, see the original description

  [Regression Potential]
  In theory, multipath suddenly working again could be surprising to people who have worked around it being broken for so long.  This seems unlikely.

  [Test case]
  Boot a d-i install with disk-detect/multipath/enable=true, and once the udebs
  have been installed, drop to a shell and try to run 'multipath' to see if it explodes with a symbol resolution error.  Ideally it won't.

  [Original report]
  I started up a precise/netboot install using debian-installer_20101020ubuntu136 and disk-detect/multipath/enable=true and found that multipath support didn't appear to be working. That is to say, both paths appeared as separate disks in the installer, and no device-mapper devices were instantiated.

  I dropped to a shell and discovered that /sbin/multipath fails to run:

  BusyBox v1.18.5 (Ubuntu 1:1.18.5-1ubuntu4) built-in shell (ash)
  Enter 'help' for a list of built-in commands.

  ~ # multipath
  multipath: symbol lookup error: /lib/libmultipath.so.0: undefined symbol: dlopen

  Note: this also seems to be the case in oneiric, though oneiric also
  has a bug where it does not appear to have the dm-multipath module
  available at install time.

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