Nagios does not have an option to configure the email relay

[Camille Rodriguez]

When installing the nagios charm, we can input an admin email to receive emails for any alerts going on. However, the configuration of the email relay or of an smtp server (i.e sendmail) on the nagios unit must be done manually. It would be preferable to have a charm option that sets this automatically.

[Camille Rodriguez (camille.rodriguez)]

What is currently being recommended to customers, but that could be a charm option instead for the smtp relay config :

Configure postfix (it is already installed in the Nagios unit)
$ juju ssh nagios/0
$ dpkg-reconfigure -p high postfix  #this will prompt questions, choose Satellite system to configure your mail name and the SMTP relay host.

Make sure you have the port 25 whitelisted in between your SMTP host and the nagios unit.

[Camille Rodriguez (camille.rodriguez)]

The configuration of postfix could be done similarly as to what is done for the landscape-server charm.

[Alvaro Uria (aluria)]

I see two approaches here:
1) Since nagios3-common package depends on default-mta | mail-transport-agent (ie. in Bionic, postfix is installed), charm-nagios could go all the way and configure the MTA. For that, we would need to have extra options to decide if we want Postfix configured in localhost-only or as a smarthost.

2) Use a different charm https://jaas.ai/search?q=postfix to configure the MTA

The downside about the first approach is that Nagios could well be deployed on the same unit as the landscape-server charm, and the Postfix configuration would conflict.

For now, and since the email configuration is optional, I'm going to mark this bug as wishlist.

[Pedro Guimarães (pguimaraes)]

I have an ongoing deployment that is also affected by this issue

[Eric Chen (eric-chen)]

This charm is no longer being actively maintained. Please consider using the new Canonical Observability Stack instead.
(https://charmhub.io/topics/canonical-observability-stack)
I will close this feature request