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Add docs for nagios

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Tim Bielawa 12 years ago
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rst/modules.rst
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@ -50,6 +50,7 @@ Let's see what's available in the Ansible module library, out of the box:
.. include:: modules/mount.rst
.. include:: modules/mysql_db.rst
.. include:: modules/mysql_user.rst
.. include:: modules/nagios.rst
.. include:: modules/ohai.rst
.. include:: modules/ping.rst
.. include:: modules/pip.rst

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rst/modules/nagios.rst
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.. _nagios:
nagios
``````
Perform common tasks in Nagios related to downtime and notifications.
The Nagios module has two basic functions: scheduling downtime and
toggling alerts for services or hosts.
The following parameters are common to all *actions* in the nagios
module:
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| parameter | required | default | comments |
+===============+==========+==================================+==================================================================+
| action | yes | | one of: 'downtime', 'enable_alerts'/'disable_alerts', or |
| | | | 'silence'/'unsilence' |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| host | yes | | host to operate on in nagios |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| cmdfile | no | /var/spool/nagios/cmd/nagios.cmd | path to the nagios *command file* (FIFO pipe) |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
The following parameters may be used with the **downtime** action:
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| parameter | required | default | comments |
+===============+==========+==================================+==================================================================+
| author | no | Ansible | author to leave downtime comments as |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| minutes | no | 30 | minutes to schedule downtime for |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| services | no | | what to manage downtime/alerts for. separate multiple services |
| | | | with commas. use 'host' to manage the host itself. |
| | | | **service** is as an alias for **services** |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
The following parameter must be used with the **enable_alerts** and **disable_alerts** actions:
+---------------+----------+----------------------------------+------------------------------------------------------------------+
| parameter | required | default | comments |
+===============+==========+==================================+==================================================================+
| services | no | | what to manage downtime/alerts for. separate multiple services |
| | | | with commas. use 'host' to manage the host itself. |
| | | | **service** is as an alias for **services** |
+---------------+----------+----------------------------------+------------------------------------------------------------------+
.. note::
The **silence** and **unsilence** actions have no additional
parameters that may be used with them.
All actions require the **host** parameter to be given explicitly. In
playbooks you can use the ``$inventory_hostname`` variable to refer to
the host the playbook is currently running on.
You can specify multiple services at once by separating them with
commas, .e.g., ``services=httpd,nfs,puppet``.
When specifying what service to handle there is a special keyword,
**host**, which will handle alerts/downtime for the **host itself**,
e.g., ``service=host``. This keyword may *not* be given with other
services at the same time. *Handling alerts/downtime for a host does
not affect alerts/downtime for any of the services running on it.*
Examples of Scheduling Downtime in :doc:`playbooks`::
---
- hosts: webservers
user: root
tasks:
- name: set 30 minutes of apache downtime
action: nagios action=downtime minutes=15 service=httpd host=$inventory_hostname
delegate_to: nagios.com
- name: schedule an hour of HOST downtime
action: nagios action=downtime minutes=60 service=host host=$inventory_hostname
delegate_to: nagios.com
# Use the default of 30 minutes
# Schedule downtime for three services at once
- name: schedule downtime for a few services
action: nagios action=downtime services=frob,foobar,qeuz host=$inventory_hostname
delegate_to: nagios.com
And from the command line:
.. code-block:: bash
$ ansible nagios.com -m nagios -a "action=downtime minutes=15 service=httpd host=server01.example.com"
$ ansible nagios.com -m nagios -a "action=downtime minutes=60 service=host host=server01.example.com"
$ ansible nagios.com -m nagios -a "action=downtime services=frob,foobar,qeuz host=server01.example.com"
Examples of handling specific host/service alerts in :doc:`playbooks`::
---
- hosts: webservers
user: root
tasks:
- name: enable SMART disk alerts
action: nagios action=enable_alerts service=smart host=$inventory_hostname
delegate_to: nagios.com
# Note that you can disable multiple at once
- name: disable httpd alerts
action: nagios action=disable_alerts service=httpd,nfs host=$inventory_hostname
delegate_to: nagios.com
# And disabling HOST alerts
- name: disable HOST alerts
action: nagios action=disable_alerts service=host host=$inventory_hostname
delegate_to: nagios.com
And from the command line:
.. code-block:: bash
$ ansible nagios.com -m nagios -a "action=enable_alerts service=smart host=server01.example.com"
$ ansible nagios.com -m nagios -a "action=disable_alerts service=httpd,nfs host=server01.example.com"
$ ansible nagios.com -m nagios -a "action=disable_alerts service=host host=server01.example.com"
Examples of Silencing all host/service alerts in :doc:`playbooks`::
---
- hosts: webservers
user: root
tasks:
- name: silence ALL alerts
action: nagios action=silence host=$inventory_hostname
delegate_to: nagios.com
- name: unsilence all alerts
action: nagios action=unsilence host=$inventory_hostname
delegate_to: nagios.com
And from the command line:
.. code-block:: bash
$ ansible nagios.com -m nagios -a "action=silence host=server01.example.com"
$ ansible nagios.com -m nagios -a "action=unsilence host=server01.example.com"
**Optional Configuration**
If your nagios **cmdfile** is not ``/var/spool/nagios/cmd/nagios.cmd``
you can configure ansible (on your nagios server) to use the correct
one by making a file called ``/etc/ansible/modules/nagios.conf`` that
looks like this:
.. code-block:: ini
[main]
cmdfile = /path/to/your/nagios.cmd
Or, use the **cmdfile** parameter to set it explicitly.
**Troubleshooting Tips**
The nagios module may not operate for you out of the box. The most
likely problem is with your **cmdfile** permissions/paths. You will
receive this error if that is the case::
{"msg": "unable to write to nagios command file", "failed": true, "cmdfile": "/var/spool/nagios/cmd/nagios.cmd"}
Steps to correct this:
1. Ensure you are running the nagios module as a user who has
**write** permissions to the **cmdfile**.
2. Ensure you have **cmdfile** set correctly.
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