icinga2/doc/2.6-running-icinga.md

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## Running Icinga
### Init Script
Icinga 2's init script is installed in `/etc/init.d/icinga2` by default:
# /etc/init.d/icinga2
Usage: /etc/init.d/icinga2 {start|stop|restart|reload|checkconfig|status}
Command | Description
--------------------|------------------------
start | The `start` action starts the Icinga 2 daemon.
stop | The `stop` action stops the Icinga 2 daemon.
restart | The `restart` action is a shortcut for running the `stop` action followed by `start`.
reload | The `reload` action sends the `HUP` signal to Icinga 2 which causes it to restart. Unlike the `restart` action `reload` does not wait until Icinga 2 has restarted.
checkconfig | The `checkconfig` action checks if the `/etc/icinga2/icinga2.conf` configuration file contains any errors.
status | The `status` action checks if Icinga 2 is running.
### <a id="cmdline"></a> Command-line Options
$ icinga2 --help
icinga2 - The Icinga 2 network monitoring daemon.
Supported options:
--help show this help message
-V [ --version ] show version information
-l [ --library ] arg load a library
-I [ --include ] arg add include search directory
-c [ --config ] arg parse a configuration file
-C [ --validate ] exit after validating the configuration
-x [ --debug ] enable debugging
-d [ --daemonize ] detach from the controlling terminal
-e [ --errorlog ] arg log fatal errors to the specified log file (only works
in combination with --daemonize)
-u [ --user ] arg user to run Icinga as
-g [ --group ] arg group to run Icinga as
Report bugs at <https://dev.icinga.org/>
Icinga home page: <http://www.icinga.org/>
#### Libraries
Instead of loading libraries using the [`library` config directive](#library)
you can also use the `--library` command-line option.
#### Config Include Path
When including files you can specify that the include search path should be
checked. You can do this by putting your configuration file name in angle
brackets like this:
include <test.conf>
This would cause Icinga 2 to search its include path for the configuration file
`test.conf`. By default the installation path for the Icinga Template Library
is the only search directory.
Using the `--include` command-line option additional search directories can be
added.
#### Config Files
Using the `--config` option you can specify one or more configuration files.
Config files are processed in the order they're specified on the command-line.
#### Config Validation
The `--validate` option can be used to check if your configuration files
contain errors. If any errors are found the exit status is 1, otherwise 0
is returned.
### <a id="features"></a> Enabling/Disabling Features
Icinga 2 provides configuration files for some commonly used features. These
are installed in the `/etc/icinga2/features-available` directory and can be
enabled and disabled using the `i2enfeature` and `i2disfeature` tools,
respectively.
The `i2enfeature` tool creates symlinks in the `/etc/icinga2/features-enabled`
directory which is included by default in the example configuration file.
You can view a list of available feature configuration files:
# i2enfeature
Syntax: i2enfeature <feature>
Enables the specified feature.
Available features: statusdat
Using the `i2enfeature` command you can enable features:
# i2enfeature statusdat
Module 'statusdat' was enabled.
Make sure to restart Icinga 2 for these changes to take effect.
You can disable features using the `i2disfeature` command:
# i2disfeature statusdat
Module 'statusdat' was disabled.
Make sure to restart Icinga 2 for these changes to take effect.
> **Note**
>
> The `i2enfeature` and `i2disfeature` commands do not restart Icinga 2.