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puppet-icinga2
==========
Table of Contents
-----------------
1. [Overview - What is the Icinga 2 module?](#overview)
2. [Module Description - What does the module do?](#module-description)
3. [Setup - The basics of getting started with the Icinga 2 module](#setup)
4. [Usage - How to use the module for various tasks](#usage)
* [Object type usage](#object_type_usage)
* [Objects](#objects)
5. [Reference - The classes and defined types available in this module](#reference)
6. [Limitations - OS compatibility, etc.](#limitations)
7. [Development - Guide for contributing to the module](#development)
8. [Contributors - List of module contributors](#contributors)
[Overview](id:overview)
--------
This module installs and configures the [Icinga 2 monitoring system](https://www.icinga.org/icinga2/). It can also install and configure [NRPE](http://exchange.nagios.org/directory/Addons/Monitoring-Agents/NRPE--2D-Nagios-Remote-Plugin-Executor/details) on client systems that are being monitored by an Icinga 2 server.
[Module Description](id:module-description)
-------------------
Coming soon...
[Setup](id:setup)
-----
This module should be used with Puppet 3.6 or later. It may work with earlier versions of Puppet 3 but it has not been tested.
This module requires Facter 2.2 or later, specifically because it uses the `operatingsystemmajrelease` fact.
This module requires the [Puppet Labs stdlib module](https://github.com/puppetlabs/puppetlabs-stdlib).
For Ubuntu systems, this module requires the [Puppet Labs apt module](https://github.com/puppetlabs/puppetlabs-apt).
On EL-based systems (CentOS, Red Hat Enterprise Linux, Fedora, etc.), the [EPEL package repository](https://fedoraproject.org/wiki/EPEL) is required.
If you would like to use the `icinga2::object` defined types as [exported resources](https://docs.puppetlabs.com/guides/exported_resources.html), you'll need to have your Puppet master set up with PuppetDB. See the Puppet Labs documentation for more info: [Docs: PuppetDB](https://docs.puppetlabs.com/puppetdb/)
###Server requirements
Icinga 2 requires either a [MySQL](http://www.mysql.com/) or a [Postgres](http://www.postgresql.org/) database.
Currently, this module does not set up any databases. You'll have to create one before installing Icinga 2 via the module.
If you would like to set up your own database, either of the Puppet Labs [MySQL](https://github.com/puppetlabs/puppetlabs-mysql) or [Postgres](https://github.com/puppetlabs/puppetlabs-postgresql) modules can be used.
The example below shows the [Puppet Labs Postgres module](https://github.com/puppetlabs/puppetlabs-postgresql) being used to install Postgres and create a database and database user for Icinga 2:
<pre>
class { 'postgresql::server': }
postgresql::server::db { 'icinga2_data':
user => 'icinga2',
password => postgresql_password('icinga2', 'password'),
}
</pre>
For production use, you'll probably want to get the database password via a [Hiera lookup](http://docs.puppetlabs.com/hiera/1/puppet.html) so the password isn't sitting in your site manifests in plain text.
[Usage](id:usage)
-----
###Server usage
To install Icinga 2, first set up a MySQL or Postgres database.
Once the database is set up, use the `icinga2::server` class with the database connection parameters to specify
<pre>
#Install Icinga 2:
class { 'icinga2::server':
server_db_type => 'pgsql',
db_host => 'localhost'
db_port => '5432'
db_name => 'icinga2_data'
db_user => 'icinga2'
db_password => 'password',
}
</pre>
When the `server_db_type` parameter is set, the right IDO database connection packages are automatically installed and the schema is loaded.
**Note:** For production use, you'll probably want to get the database password via a [Hiera lookup](http://docs.puppetlabs.com/hiera/1/puppet.html) so the password isn't sitting in your site manifests in plain text:
<pre>
#Install Icinga 2:
class { 'icinga2::server':
server_db_type => 'pgsql',
db_host => 'localhost'
db_port => '5432'
db_name => 'icinga2_data'
db_user => 'icinga2'
db_password => hiera('icinga_db_password_key_here'),
}
</pre>
You'll also need to add an IDO connection object that has the same database settings and credentials as what you entered for your `icinga2::server` class.
You can do this by applying either the `icinga2::object::idomysqlconnection` or `icinga2::object::idopgsqlconnection` class to your Icinga 2 server, depending on which database you're using.
An example `icinga2::object::idopgsqlconnection` class is below:
<pre>
icinga2::object::idopgsqlconnection { 'postgres_connection':
target_dir => '/etc/icinga2/features-enabled',
target_file_name => 'ido-pgsql.conf',
host => '127.0.0.1',
port => 5432,
user => 'icinga2',
password => 'password',
database => 'icinga2_data',
categories => ['DbCatConfig', 'DbCatState', 'DbCatAcknowledgement', 'DbCatComment', 'DbCatDowntime', 'DbCatEventHandler' ],
}
</pre>
In a future version, the module will automatically create the IDO connection objects.
**Note:** If you will be installing NRPE or the Nagios plugins packages with the `icinga2::nrpe` class on a node that also has the `icinga2::server` class applied, be sure to set the `$server_install_nagios_plugins` parameter in your call to `icinga2::server` to `false`:
<pre>
#Install Icinga 2:
class { 'icinga2::server':
...
server_install_nagios_plugins => false,
...
}
</pre>
This will stop the `icinga2::server` class from trying to install the plugins pacakges, since the `icinga2::nrpe` class will already be installing them and will prevent a resulting duplicate resource error.
If you would like to install packages to make a `mail` command binary available so that Icinga 2 can send out notifications, set the `install_mail_utils_package` parameter to **true**:
<pre>
class { 'icinga2::server':
...
install_mail_utils_package => true,
...
}
</pre>
###NRPE usage
To install NRPE and allow the local machine and Icinga 2 servers (or Icinga 1 or plain old Nagios servers) with various IP addresess to connect:
<pre>
class { 'icinga2::nrpe':
nrpe_allowed_hosts => ['10.0.1.79', '10.0.1.80', '10.0.1.85', '127.0.0.1'],
}
</pre>
**Note:** If you would like to install NRPE on a node that also has the `icinga2::server` class applied, be sure to set the `$server_install_nagios_plugins` parameter in your call to `icinga2::server` to `false`:
<pre>
#Install Icinga 2:
class { 'icinga2::server':
server_db_type => 'pgsql',
server_install_nagios_plugins => false,
}
</pre>
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.
###[Object type usage](id:object_type_usage)
This module includes several defined types that can be used to automatically generate Icinga 2 format object definitions. They function in a similar way to [the built-in Nagios types that are included in Puppet](http://docs.puppetlabs.com/guides/exported_resources.html#exported-resources-with-nagios).
####Exported resources
Like the built-in Nagios types, the Icinga 2 objects in this module can be exported to PuppetDB as virtual resources and collected on your Icinga 2 server.
Nodes that are being monitored can have the `@@` virtual resources applied to them:
<pre>
@@icinga2::object::host { $::fqdn:
display_name => $::fqdn,
ipv4_address => $::ipaddress_eth0,
groups => ['linux_servers', 'mysql_servers'],
vars => {
os => 'linux',
virtual_machine => 'true',
distro => $::operatingsystem,
},
target_dir => '/etc/icinga2/objects/hosts',
target_file_name => "${fqdn}.conf"
}
</pre>
Then, on your Icinga 2 server, you can collect the exported virtual resources (notice the camel casing in the class name):
<pre>
#Collect all @@icinga2::object::host resources from PuppetDB that were exported by other machines:
Icinga2::Object::Host <<| |>> { }
</pre>
Unlike the built-in Nagios types, the file owner, group and mode of the automatically generated files can be controlled via the `target_file_owner`, `target_file_group` and `target_file_mode` parameters:
<pre>
@@icinga2::object::host { $::fqdn:
display_name => $::fqdn,
ipv4_address => $::ipaddress_eth0,
groups => ['linux_servers', 'mysql_servers'],
vars => {
os => 'linux',
virtual_machine => 'true',
distro => $::operatingsystem,
},
target_dir => '/etc/icinga2/objects/hosts',
target_file_name => "${fqdn}.conf"
target_file_owner => 'root',
target_file_group => 'root',
target_file_mode => '644'
}
</pre>
####`undef` and default object values
Most of the object parameters *in the Puppet module* are set to **undef**.
This means that they will not be added to the rendered object definition files.
**However**, this doesn't mean that the values are undefined in Icinga 2. Icinga 2 itself has built-in default values for many object parameters and falls back to them if one isn't present in an object definition. See the docs for individual object types in [Configuring Icinga 2](http://docs.icinga.org/icinga2/latest/doc/module/icinga2/toc#!/icinga2/latest/doc/module/icinga2/chapter/configuring-icinga2) for more info about which object parameters have what default values.
####[Objects](id:objects)
Object types:
* [icinga2::object::apply_service_to_host](#object_apply_service_to_host)
* [icinga2::object::host](id:object_host)
* [icinga2::object::hostgroup](id:object_hostgroup)
####`icinga2::object::apply_service_to_host`
The `apply_service_to_host` defined type can create `apply` objects to apply services to hosts:
<pre>
#Create an apply that checks the number of zombie processes:
icinga2::object::apply_service_to_host { 'check_zombie_procs':
display_name => 'Zombie procs',
check_command => 'nrpe',
vars => {
nrpe_command => 'check_zombie_procs',
},
assign_where => '"linux_servers" in host.groups',
ignore_where => 'host.name == "localhost"',
target_dir => '/etc/icinga2/objects/applys'
}
</pre>
This defined type has the same available parameters that the `icinga2::object::service` defined type does.
The `assign_where` and `ignore_where` parameter values are meant to be provided as strings. Since Icinga 2 requires that string literals be double-quoted, the whole string in your Puppet site manifests will have to be single-quoted (leaving the double quotes intact inside):
<pre>
assign_where => '"linux_servers" in host.groups',
</pre>
If you would like to use Puppet or Facter variables in an `assign_where` or `ignore_where` parameter's value, you'll first need to double-quote the whole value for [Puppet's variable interpolation](http://docs.puppetlabs.com/puppet/latest/reference/lang_datatypes.html#double-quoted-strings) to work. Then, you'll need to escape the double quotes that surround the Icinga 2 string literals inside:
<pre>
assign_where => "\"linux_servers\" in host.${facter_variable}"",
</pre>
####[`icinga2::object::host`](id:object_host)
This defined type creates host objects.
Example:
<pre>
@@icinga2::object::host { $::fqdn:
display_name => $::fqdn,
ipv4_address => $::ipaddress_eth1,
groups => ["linux_servers", 'mysql_servers', 'postgres_servers', 'clients', 'smtp_servers', 'ssh_servers', 'http_servers', 'imap_servers'],
vars => {
os => 'linux',
virtual_machine => 'true',
distro => $::operatingsystem,
},
target_dir => '/etc/icinga2/objects/hosts',
target_file_name => "${fqdn}.conf"
}
</pre>
Notes on specific parameters:
* `groups`: must be specified as a [Puppet array](https://docs.puppetlabs.com/puppet/latest/reference/lang_datatypes.html#arrays), even if there's only one element
* `vars`: must be specified as a [Puppet hash](https://docs.puppetlabs.com/puppet/latest/reference/lang_datatypes.html#hashes), with the Icinga 2 variable as the **key** and the variable's value as the **value**
**Note:** The `ipv6_address` parameter is set to **undef** by default. This is because `facter` can return either IPv4 or IPv6 addresses for the `ipaddress_ethX` facts. The default value for the `ipv6_address` parameter is set to **undef** and not `ipaddress_eth0` so that an IPv4 address isn't unintentionally set as the value for `address6` in the rendered host object definition.
If you would like to use an IPv6 address, make sure to set the `ipv6_address` parameter to the `ipaddress_ethX` fact that will give you the right IPv6 address for the machine:
<pre>
@@icinga2::object::host { $::fqdn:
display_name => $::fqdn,
ipv6_address => $::ipaddress_eth1,
....
}
</pre>
####[`icinga2::object::hostgroup`](id:object_hostgroup)
Coming soon...
[Reference](id:reference)
---------
Classes:
Coming soon...
Defined types:
Coming soon...
[Limitations](id:limitations)
------------
Coming soon...
[Development](id:contributors)
------------
Coming soon...
[Contributors](id:contributors)
------------
Coming soon...

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