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Version: 22.10

Splunk Metrics

The Splunk Metrics stream connector allows you to send data from Centreon to Splunk instances.

Before starting​

If you want to retrieve only metrics, use the Splunk Metrics stream connector. If you want to retrieve all the data for the events, use the Splunk Events stream connector.

  • In most cases, you will want to send data from the central server. It is also possible to send it from a remote server or a poller (e.g. if you want to avoid the central server being a SPOF, or if you are an MSP and you install the stream connector on a poller or a remote serevr within your customer's infrastructure).
  • By default, the Splunk Metrics stream connector sends metrics from host_status and service_status Broker events. These metrics are contained in the perf_data field of the events. The event format is shown here.
  • These events are sent each time a host or a service is checked. Various parameters let you filter out events.


Perform the installation on the server that will send data to Splunk (central server, remote server, poller).


Install the Epel repository.

yum -y install epel-release

Install dependencies.

yum install luarocks make gcc lua-curl lua-devel

Lua modules​

Install Centreon lua modules.

luarocks install centreon-stream-connectors-lib

Download the Splunk metrics stream connector​

wget -O /usr/share/centreon-broker/lua/splunk-metrics-apiv2.lua
chmod 644 /usr/share/centreon-broker/lua/splunk-metrics-apiv2.lua

Configuring your Splunk equipment​

You may need to configure your Splunk equipment so that it can receive data from Centreon. Please refer to Splunk's documentation. Make sure Splunk is able to receive data sent by Centreon: flows must not be blocked by Splunk's configuration or by a security equipment.

The correct sourcetype for the stream connector is "_json". Other useful information may be for example "source": "http:my_index", "index": "my_index", "host": "Central". You can also add this information to your stream connector's configuration if you need to.

Configuring the stream connector in Centreon​

  1. On your central server, go to Configuration > Pollers > Broker configuration.
  2. Click on central-broker-master (or the appropriate broker configuration if it is a poller or a remote server that will send events).
  3. On the Output tab, select Generic - Stream connector from the list and then click Add. A new output appears in the list.
  4. Fill in the fields as follows:
NameSplunk metrics
Filter categoryNeb
  1. To enable Centreon to connect to your Splunk equipment, fill in the following mandatory parameters. The fields for the first entry are already present. Click on the +Add a new entry link located below the Filter category table to add another one.
TypeNameValue explanationValue exemple
stringhttp_server_urlThe URL of the Splunk service collector
stringsplunk_tokenToken to use the event collector API
  1. Fill in any optional parameters you want (using the +Add a new entry link):
TypeNameValue explanationdefault value
stringlogfileThe file in which logs are written/var/log/centreon-broker/splunk-metrics.log
numberlog_levelLogging level from 1 (errors) to 3 (debug)1
  1. Use the stream connector's optional parameters to filter or adapt the data you want Centreon to send to Splunk.

  2. Deploy the configuration.

  3. Restart centengine on all pollers:

    systemctl restart centengine

    Splunk should now receive data from Centreon. To test if it is working, see Curl commands: testing the stream connector.

Filtering or adapting the data you want to send to Splunk​

All stream connectors have a set of optional parameters, that allow you to filter the data you will send to your Splunk equipment, to reformat the data, to define a proxy...

Each optional parameter has a default value, that is indicated in the corresponding documentation.

  • To override the default value of a parameter, click on the +Add a new entry link located below the Filter category table to add a custom parameter. For example, if you want to only send to Splunk the events handled by a poller named "poller-1", enter:

    type = string
    name = accepted_pollers
    value = poller-1
  • For the Splunk Metrics stream connector, the following values always override the default values, you do not need to define them in the interface.

TypeNameDefault value for the stream connector

Event bulking​

This stream connector is compatible with event bulking. Meaning that it is able to send more that one event in each call to the Splunk REST API.

To use this feature you must add the following parameter in your stream connector configuration.

numbermax_buffer_sizemore than one

Event format​

This stream connector will send events with the following format.

service_status event​

"sourcetype": "_json",
"source": "http:my_index",
"index": "my_index",
"host": "Central",
"time": 1675865364,
"fields": {
"event_type": "service",
"state": 2,
"state_type": 1,
"hostname": "my_host",
"service_description": "my_service",
"ctime": 1675865364,
"metric: pl": 0,
"metric: rta": 10,
"metric: rtmin": 5,
"metric: rtmax": 15

host_status event​

"sourcetype": "_json",
"source": "http:my_index",
"index": "my_index",
"host": "Central",
"time": 1675865364,
"fields": {
"event_type": "host",
"state": 1,
"state_type": 1,
"hostname": "my_host",
"ctime": 1675865364,
"metric: pl": 0,
"metric: rta": 10,
"metric: rtmin": 5,
"metric: rtmax": 15

Custom event format​

You can't change the format of the event for metrics oriented stream connectors. This means you cannot send other Broker events that contain performance data.

Curl commands: testing the stream connector​

Sending events​

If you want to test that events are sent to Splunk correctly:

  1. Log in to the server that you configured to send events to Splunk (your central server, a remote server or a poller).

  2. Run the following command:

    curl -X POST -H "content-type: application/json" -H "authorization: Splunk <splunk_token>" '<http_server_url>' -d '{"sourcetype": "<splunk_sourcetype>","source": "<splunk_source>","index": "<splunk_index>","host": "<splunk_host>","time": <epoch_timestamp>,"event": {"event_type": "host","state": 1,"state_type": 1,"hostname":"my_host","ctime": 1675865364,"metric: pl": 0,"metric: rta": 10,"metric: rtmin": 5,"metric: rtmax": 15}}'

    Replace all the <xxxx> inside the above command with the correct value. For instance, <splunk_sourcetype> may become _json.

  3. Check that the event has been received by Splunk.