Added support for installing packages on Icinga 2 servers that will make the mail command available. Without it, Icinga 2 can't send out notifications. Also added a parameter to controller whether the packages will get installed; added a note in the README about the parameter.

refs #7212: https://dev.icinga.org/issues/7212

README.md

@@ -114,6 +114,16 @@ class { 'icinga2::server':
 
 This will stop the `icinga2::server` class from trying to install the plugins pacakges, since the `icinga2::nrpe` class will already be installing them and will prevent a resulting duplicate resource error.
 
+If you would like to install packages to make a `mail` command binary available so that Icinga 2 can send out notifications, set the `install_mail_utils_package` parameter to true:
+
+<pre>
+  class { 'icinga2::server': 
+    ...
+    install_mail_utils_package => true,
+    ...
+  }
+</pre> 
+
 ###NRPE usage
 
 To install NRPE and allow the local machine and Icinga 2 servers (or Icinga 1 or plain old Nagios servers) with various IP addresess to connect:

manifests/params.pp

@@ -41,6 +41,7 @@ class icinga2::params {
   #Whether to manage the package repositories
   $manage_repos = true
   $server_db_type = 'pgsql'
+  $install_mail_utils_package = false
 
   #Database paramters
   $db_name = 'icinga2_data'
@@ -64,11 +65,13 @@ class icinga2::params {
           #Icinga 2 server package
           $icinga2_server_package = 'icinga2'
           $icinga2_server_plugin_packages = ["nagios-plugins-nrpe", "nagios-plugins-all", "nagios-plugins-openmanage", "nagios-plugins-check-updates"]
+          $icinga2_server_mail_package = 'mailx'
         }
         '7': {
           #Icinga 2 server package
           $icinga2_server_package = 'icinga2'
           $icinga2_server_plugin_packages = ["nagios-plugins-nrpe", "nagios-plugins-all", "nagios-plugins-openmanage", "nagios-plugins-check-updates"]
+          $icinga2_server_mail_package = 'mailx'
         }
         #Fail if we're on any other CentOS release:
         default: { fail("${::operatingsystemmajrelease} is not a supported CentOS release!") }
@@ -82,6 +85,7 @@ class icinga2::params {
         '12.04': {
           $icinga2_server_package = 'icinga2'
           $icinga2_server_plugin_packages = ["nagios-plugins", "nagios-plugins-basic", "nagios-plugins-standard", "nagios-snmp-plugins", "nagios-plugins-extra", "nagios-nrpe-plugin"]
+          $icinga2_server_mail_package = 'mailutils'
           #Specify '--no-install-recommends' so we don't inadvertently get Nagios 3 installed; it comes as a recommended package with most of the plugin packages:
           $server_plugin_package_install_options = '--no-install-recommends'
         }
@@ -89,6 +93,7 @@ class icinga2::params {
         '14.04': {
           $icinga2_server_package = 'icinga2'
           $icinga2_server_plugin_packages = [ "nagios-plugins", "nagios-plugins-basic", "nagios-plugins-common", "nagios-plugins-standard", "nagios-snmp-plugins", "nagios-plugins-extra", "nagios-plugins-contrib", "nagios-nrpe-plugin"]
+          $icinga2_server_mail_package = 'mailutils'
           #Specify '--no-install-recommends' so we don't inadvertently get Nagios 3 installed; it comes as a recommended package with most of the plugin packages:
           $server_plugin_package_install_options = '--no-install-recommends'
         }

manifests/server.pp

@@ -22,6 +22,7 @@ class icinga2::server (
   $package_provider = $icinga2::params::package_provider,
   $icinga2_server_package = $icinga2::params::icinga2_server_package,
   $server_install_nagios_plugins = $icinga2::params::server_install_nagios_plugins,
+  $install_mail_utils_package = $icinga2::params::install_mail_utils_package,
 ) inherits icinga2::params {
 
   #Do some validation of parameters so we know we have the right data types:

manifests/server/install.pp

@@ -80,6 +80,15 @@ class icinga2::server::install::packages inherits icinga2::server {
     }
   }
 
+  if $install_mail_utils_package == true {
+    #Install the package that has the 'mail' binary in it so we can send notifications:
+    package {$icinga2_server_mail_package:
+      ensure   => installed,
+      provider => $package_provider,
+      install_options => $server_plugin_package_install_options,
+    }
+  }
+
   #Pick the right DB lib package name based on the database type the user selected:
   case $server_db_type {
     #MySQL: