[Bug 1387002] [NEW] typo in maas-region-controller.postrm stops remove/purge from correctly calling dbconfig

[Mike McCracken]

Public bug reported:

line 9 of maas-region-controller.postrm tests for the existence of '/etc
/dbconfig-common/maas.conf', which will not exist. the file that gets
created is instead maas-region-controller.conf. since that test is never
true, the call to dbc_go to do the postrm.pgsql stuff never happens.

This appears to contribute to some flakiness involving purging and
reinstalling maas.

On one server that I'm currently having difficulty with, I had a /etc
/dbconfig-common/maas-region-controller.conf that was two months (and
several maas versions) old, despite having purged several times.

I think this is related to the error messages I was seeing when purging,
including errors about wrong password for user maas. The
local_settings.py I saw had a password of 'maas', but that .conf file
had a different password.

Unfortunately, while this appears to be a legitimate typo bug, manually
fixing it and re-running the purge did not fix my problems:

Setting up maas-region-controller (1.7.0~beta8+bzr3273-0ubuntu1~trusty1) ...
dpkg: error processing package maas-region-controller (--configure):
 subprocess installed post-installation script returned error exit status 10

** Affects: maas (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: cloud-installer

** Description changed:

- 
- line 9 of maas-region-controller.postrm tests for the existence of '/etc/dbconfig-common/maas.conf', which will not exist. the file that gets created is instead maas-region-controller.conf. since that test is never true, the call to dbc_go to do the postrm.pgsql stuff never happens.
+ line 9 of maas-region-controller.postrm tests for the existence of '/etc
+ /dbconfig-common/maas.conf', which will not exist. the file that gets
+ created is instead maas-region-controller.conf. since that test is never
+ true, the call to dbc_go to do the postrm.pgsql stuff never happens.
  
  This appears to contribute to some flakiness involving purging and
  reinstalling maas.
  
  On one server that I'm currently having difficulty with, I had a /etc
  /dbconfig-common/maas-region-controller.conf that was two months (and
  several maas versions) old, despite having purged several times.
  
  I think this is related to the error messages I was seeing when purging,
  including errors about wrong password for user maas. The
  local_settings.py I saw had a password of 'maas', but that .conf file
  had a different password.
+ 
+ Unfortunately, while this appears to be a legitimate typo bug, manually
+ fixing it and re-running the purge did not fix my problems.

** Description changed:

  line 9 of maas-region-controller.postrm tests for the existence of '/etc
  /dbconfig-common/maas.conf', which will not exist. the file that gets
  created is instead maas-region-controller.conf. since that test is never
  true, the call to dbc_go to do the postrm.pgsql stuff never happens.
  
  This appears to contribute to some flakiness involving purging and
  reinstalling maas.
  
  On one server that I'm currently having difficulty with, I had a /etc
  /dbconfig-common/maas-region-controller.conf that was two months (and
  several maas versions) old, despite having purged several times.
  
  I think this is related to the error messages I was seeing when purging,
  including errors about wrong password for user maas. The
  local_settings.py I saw had a password of 'maas', but that .conf file
  had a different password.
  
  Unfortunately, while this appears to be a legitimate typo bug, manually
- fixing it and re-running the purge did not fix my problems.
+ fixing it and re-running the purge did not fix my problems:
+ 
+ Setting up maas-region-controller (1.7.0~beta8+bzr3273-0ubuntu1~trusty1) ...
+ dpkg: error processing package maas-region-controller (--configure):
+  subprocess installed post-installation script returned error exit status 10

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https://bugs.launchpad.net/bugs/1387002

Title:
  typo in maas-region-controller.postrm stops remove/purge from
  correctly calling dbconfig

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