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

[Louis Bouchard]

Public bug reported:

[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

** Affects: multipath-tools (Ubuntu)
     Importance: Undecided
         Status: Invalid

** Affects: multipath-tools (Ubuntu Trusty)
     Importance: Medium
     Assignee: Louis Bouchard (louis-bouchard)
         Status: Confirmed

** Also affects: multipath-tools (Ubuntu Trusty)
   Importance: Undecided
       Status: New

** Changed in: multipath-tools (Ubuntu)
       Status: New => Invalid

** Changed in: multipath-tools (Ubuntu Trusty)
       Status: New => Confirmed

** Changed in: multipath-tools (Ubuntu Trusty)
     Assignee: (unassigned) => Louis Bouchard (louis-bouchard)

** Changed in: multipath-tools (Ubuntu Trusty)
   Importance: Undecided => Medium

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to multipath-tools in Ubuntu.
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:
  Invalid
Status in multipath-tools source package in Trusty:
  Confirmed

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

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/multipath-tools/+bug/1621835/+subscriptions