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[Bug 1914293] [NEW] Add support for failover nagios deployment

 

Public bug reported:

As Nagios is currently not cluster-aware, it is possible to deploy
multiple nagios units which will both monitor and alert on the status of
the environment through the notifications/pagerduty modules configured.

I would like to see an option to detect whether multiple units of nagios
are deployed and to have the Juju elected-leader have the external
(pagerduty) notifications enabled and have them disabled on the non-
leader unit with some way for the units to monitor and alert against
each other not able to reach the notification APIs and taking over
alerts for the other.  This is essentially to reduce double-incident
alerting when running two nagios monitors.

Another consideration is to have nagios non-leader sitting idle with
nagios not running, and on leader-elected, starting nagios if it's the
new leader.  This methodology would reduce the overhead of hitting all
of the monitors on nrpe endpoints twice.

Third option may be to tie into hacluster and configure it to manage the
active nagios instance and VIP for the nagios web endpoint.

** Affects: charm-nagios
     Importance: Wishlist
         Status: New

** Changed in: charm-nagios
   Importance: Undecided => Wishlist

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https://bugs.launchpad.net/bugs/1914293

Title:
  Add support for failover nagios deployment

Status in Nagios Charm:
  New

Bug description:
  As Nagios is currently not cluster-aware, it is possible to deploy
  multiple nagios units which will both monitor and alert on the status
  of the environment through the notifications/pagerduty modules
  configured.

  I would like to see an option to detect whether multiple units of
  nagios are deployed and to have the Juju elected-leader have the
  external (pagerduty) notifications enabled and have them disabled on
  the non-leader unit with some way for the units to monitor and alert
  against each other not able to reach the notification APIs and taking
  over alerts for the other.  This is essentially to reduce double-
  incident alerting when running two nagios monitors.

  Another consideration is to have nagios non-leader sitting idle with
  nagios not running, and on leader-elected, starting nagios if it's the
  new leader.  This methodology would reduce the overhead of hitting all
  of the monitors on nrpe endpoints twice.

  Third option may be to tie into hacluster and configure it to manage
  the active nagios instance and VIP for the nagios web endpoint.

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