[Bug 1621835] Re: multipathd reconfigure does not update /etc/multipath/wwids file on trusty

[Robie Basak]

@Leonardo

Please do not mess with bug statuses without providing an explanation.
The correct status is for the development release Fix Released as Louis
reported it fixed in his comment above.

** Changed in: multipath-tools (Ubuntu)
       Status: Confirmed => Fix Released

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https://bugs.launchpad.net/bugs/1621835

Title:
  multipathd reconfigure does not update /etc/multipath/wwids file on
  trusty

Status in multipath-tools package in Ubuntu:
  Fix Released
Status in multipath-tools source package in Trusty:
  In Progress

Bug description:
  [Description of the problem]
  [SRU justification]
  When running "multipathd reconfigure", which is done when one does a "service multipath-tools restart", the file /etc/multipath/wwids does not get updated with the wwid entries. Only the header is found.

  [Impact]
  The content of the file may contain stale values or remain with only the file header if the file was removed.

  [Fix]
  Add a call to remember_wwid(mpp->wwid)

  [Test Case]
  With an up-to-date Trusty system running multipath-tools-0.4.9-3ubuntu7.13 do the following :

  $ sudo cat /etc/multipath/wwids
  # Multipath wwids, Version : 1.0
  # NOTE: This file is automatically maintained by multipath and multipathd.
  # You should not need to edit this file in normal circumstances.
  #
  # Valid WWIDs:
  /149455400000000006c756e31000000000000000000000000/
  /149455400000000006c756e32000000000000000000000000/
  /149455400000000006c756e30000000000000000000000000/

  $ sudo rm /etc/multipath/wwids
  $ sudo service multipath-tools restart
  $ sudo cat /etc/multipath/wwids
  # Multipath wwids, Version : 1.0
  # NOTE: This file is automatically maintained by multipath and multipathd.
  # You should not need to edit this file in normal circumstances.
  #
  # Valid WWIDs:

  With the proposed fix, the last command would give :
  $ sudo cat /etc/multipath/wwids
  # Multipath wwids, Version : 1.0
  # NOTE: This file is automatically maintained by multipath and multipathd.
  # You should not need to edit this file in normal circumstances.
  #
  # Valid WWIDs:
  /149455400000000006c756e31000000000000000000000000/
  /149455400000000006c756e32000000000000000000000000/
  /149455400000000006c756e30000000000000000000000000/

  [Regression]
  Only one call to remember_wwid() is added. This is what is currently done in 0.5.0

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