About lookups and workflow actions
Lookups and workflow actions enable you to enrich and extend the usefulness of your event data through interactions with external resources.
Lookup tables use information in your events to determine how to add other fields from external data sources such as static tables (CSV files) and Python-based commands. It's also possible to create lookups that add fields based on time information.
A really basic example of this functionality would be a static lookup that takes the
http_status value in an event, matches that value with its definition in a CSV file, and then adds that definition to the event as the value of a new
status_description field. So if you have an event where
http_status = 503 the lookup would add
status_description = Service Unavailable, Server Error to that event.
Of course, there are more advanced ways to work with lookups. For example, you can:
- Arrange to have a static lookup table be populated by the results of a saved search.
- Define a field lookup that is based on an external Python script rather than a lookup table. For example, you could create a lookup that uses a Python script that returns an IP address when given a host name, and returns a host name when given an IP address.
- Create a time-based lookup, if you are working with a lookup table that includes a field value that represents time. For example, this could come in handy if you need to use DHCP logs to identify users on your network based on their IP address and the event timestamp.
For more information, see "Lookup fields from external data sources," in this chapter.
Workflow actions enable you to set up interactions between specific fields in your data and other applications or web resources. A really simple workflow action would be one that is associated with a
IP_address field, which, when launched, opens an external WHOIS search in a separate browser window based on the
You can also set up workflow actions that:
- Apply only to particular fields (as opposed to all fields in an event).
- Apply only to events belonging to a specific event type or group of event types.
- Are accessed either via event dropdown menus, field dropdown menus, or both.
- Perform HTTP GET requests, enabling you to pass information to an external web resource, such as a search engine or IP lookup service.
- Perform HTTP POST requests that can send field values to an external resource. For example, you could design one that sends a status value to an external issue-tracking application.
- Take certain field values from a chosen event and insert them into a secondary search that is populated with those field values and which launches in a secondary browser window.
For information about setting workflow actions up in Manager, see "Create workflow actions in Splunk Web", in this chapter.
Look up fields from external data sources
This documentation applies to the following versions of Splunk® Enterprise: 4.3, 4.3.1, 4.3.2, 4.3.3, 4.3.4, 4.3.5, 4.3.6, 4.3.7