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[Xav Paice <1819537@xxxxxxxxxxxxxxxxxx>]

Reproducer:

juju deploy cs:nagios-38

wait for hooks to settle

juju config nagios enable_livestatus=true

2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60 Traceback (most recent call last):
2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60   File "/var/lib/juju/agents/unit-nagios-0/charm/hooks/config-changed", line 623, in <module>
2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60     enable_livestatus_config()
2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60   File "/var/lib/juju/agents/unit-nagios-0/charm/hooks/config-changed", line 185, in enable_livestatus_config
2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60     os.chown(livestatus_path, uid, gid)
2020-09-30 07:32:28 WARNING unit.nagios/0.config-changed logger.go:60 OSError: [Errno 2] No such file or directory: '/var/lib/nagios3/livestatus/socket'
2020-09-30 07:32:28 ERROR juju.worker.uniter.operation runhook.go:136 hook "config-changed" (via explicit, bespoke hook script) failed: exit status 1

This is clearly some kind of race condition because retrying the hook is
successful.

** Changed in: charm-nagios
       Status: Expired => Confirmed

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https://bugs.launchpad.net/bugs/1819537

Title:
  config-changed hook fails with enable_livestatus enabled

Status in Nagios Charm:
  Confirmed

Bug description:
  http://paste.ubuntu.com/p/qQn2CZSPvY/

  2019-03-11 20:20:47 INFO juju-log Fixing perms on the socket
  2019-03-11 20:20:47 DEBUG config-changed Traceback (most recent call last):
  2019-03-11 20:20:47 DEBUG config-changed   File "/var/lib/juju/agents/unit-nagios-0/charm/hooks/config-changed", line 350, in <module>
  2019-03-11 20:20:47 DEBUG config-changed     enable_livestatus_config()
  2019-03-11 20:20:47 DEBUG config-changed   File "/var/lib/juju/agents/unit-nagios-0/charm/hooks/config-changed", line 106, in enable_livestatus_config
  2019-03-11 20:20:47 DEBUG config-changed     os.chown(livestatus_path, uid, gid)
  2019-03-11 20:20:47 DEBUG config-changed OSError: [Errno 2] No such file or directory: '/var/lib/nagios3/livestatus/socket'

  In enable_livestatus_config, it is creating this directory and then
  trying to chown livestatus_path, but it doesn't look like anything has
  made a socket there. I don't know what is supposed to.

  This results in a hook failure. The application eventually gets to
  Ready, but this is enough to trip juju wait.

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