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