Splunk® Add-on Builder

Splunk Add-on Builder User Guide

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Create alert actions

In Create Alert Actions, create and configure alert actions, which appear in Splunk Enterprise for users of your add-on. Alert actions might define third-party integrations, add custom functionality, or support adaptive response actions for Splunk Enterprise Security.

Once you have added alert actions to your add-on, you can manage them from the Alert Action page under Create Alert Actions. Your alert actions also appear on the Settings > Alert Actions page in Splunk Web.

Create an alert action

  1. On your add-on homepage, click the Create Alert Actions icon.
  2. On the Alert Actions page, click New Alert Action.
    The Create Alert Action wizard starts.
  3. On the Alert Action Properties page, enter the properties for this alert action:
    • Enter a name, label, and description for this alert action. The label is the friendly name that appears in Splunk Web.
    • Optionally, click Upload my icon if you want to add an icon, such as a logo, to this alert action.
    • If you want to create an adaptive response action, see Create an adaptive response action for Enterprise Security, below.
    AOB2.2 createalertaction.jpg
  4. Click Next.
  5. On the Alert Action Inputs tab, specify one or more input fields for this alert action.
  6. For each input, drag a field from the Component Library to the center panel, then specify its properties in the Property Editor.
    If certain permission is required to trigger the alerts, you can drag Text field and Password field on the Component Library, specify the properties and then add the account in the Add-on Setup Parameters page as the example below
  7. Optionally, click the Add-on Setup Parameters tab to define any parameters that are required for users to configure your add-on.
    • Select predefined options to prompt for account, proxy, or logging settings.
    • Add custom inputs by dragging fields from the Component Library to the center panel panel. Select an input to specify its properties in the Property Editor.
    • For more about setup pages, see Create a setup page.

  8. Click Next.
  9. On the Alert Action Parameters tab, in the Code Editor panel edit the Python code to create your alert action.
    • Find the comment # TODO: Implement your alert action logic here, which indicates where to add your code.
    • Use the Python helper functions, which are dynamically generated as commented code, as a guide to working with the input parameters you defined in the previous step.
    • If you want to collect data using SSL certificate, use send_http_request function as follows.
      import solnlib.splunkenv
      
      #The cert file locates in <TA_folder>/default/example.pem
      
      cert_file_path = solnlib.splunkenv.make_splunkhome_path(['<TA_folder>', 'default', 'example.pem'])
      response = helper.send_http_request('https;//www.example.com/api', 'GET', verify=cert_file_path)
      
    • helper.settings is a dict that contains information including SPL, Splunk environment configurations and alert configurations. If you want to use the information in helper.settings, use the following sample code as an example.
      Syntax:
      search_name = helper.settings.get(‘search_name’) 
      sid = helper.settings.get(‘sid’) 
      
    AddonBuilder2 AlertActionDefn.png
  10. On the Alert Action Parameters tab, enter sample values for testing this alert action.
  11. If you created a setup page, on the Add-on Setup Parameters tab enter sample values to test the setup page.
  12. Click Test to test your code and the alert action configuration.
    The Output section indicates whether the command succeeded or failed.
  13. Click Save to save this alert action, then click Finish.

Create an adaptive response action for Enterprise Security

An adaptive response action is a type of alert action that is specifically created for Splunk Enterprise Security. An adaptive response action can be triggered from correlation searches or on an ad hoc basis when examining a notable event on the Incident Review dashboard.

You can use the Splunk Add-on Builder to create an alert action that supports adaptive response. Adaptive response actions must conform to the Common Action Model, which is included with the Splunk Common Information Model add-on.

Note  The Splunk Common Information Model add-on version 4.6.0 or later is required by:
  • Add-on developers to create adaptive response actions
  • End users of your add-on to run adaptive response action
Download the Splunk Common Information Model add-on from Splunkbase.

To create an adaptive response

  1. On your add-on homepage, click the Create Alert Actions icon.
  2. On the Alert Actions page, click New Alert Action.
  3. The Create Alert Action wizard starts.
  4. On the Alert Action Properties page, enter the properties for this alert action:
    • Enter a name, label, and description for this alert action. The label is the friendly name that appears in Splunk Web.
    • Optionally, click Upload my icon if you want to add an icon, such as a logo, to this alert action.
  5. Select Support as an adaptive response action in Splunk Enterprise Security and fill out the fields as follows:
  6. AOB2.2 createalertaction2.jpg

    • For Category, enter the categories the action belongs to, such as "Information Gathering".
    • For Task, enter the functions performed by the action, such as "scan".
    • For Subject, enter the objects that the action's tasks can be performed on, such as "endpoint.file".
    • For Vendor, enter the technology vendor that the action supports.
    • For Product, enter the products that the action supports.
    • For Version, enter the versions of the product that the action supports.
  7. Select Support as an ad hoc action if the action supports ad hoc invocation from the Actions menu on the Incident Review dashboard in Splunk Enterprise Security. For help determining whether your action supports ad hoc invocation, see Determine whether your action supports ad hoc invocation on the Splunk Developer Portal.

    Then, fill in the related fields as follows:
    • Optionally, for Custom drilldown, enter a URL to a custom drilldown or view for the link that appears in the detailed view of a notable even on the Incident Review dashboard in Splunk Enterprise Security. If you don't specify a URL, the default URL runs a search for the result events created by this response action.
    • To specify a target in an app outside Enterprise Security, use the format
      ../<app_context>/<viewname>?<additional drilldown parameters>. For example:

      ../my_app/my_view?form.sid=$orig_sid$&form.rid=$orig_rid$

      To redirect to a custom view within Enterprise Security, use the format
      /<viewname>?<additional drilldown parameters>. For example:

      /my_view?form.sid=$orig_sid$&form.rid=$orig_rid$
    • For Sourcetype, enter the source type to which to assign the events produced as a result of this response action.
  8. Click Next.
  9. On the Alert Action Inputs tab, specify one or more input fields that are required for configuring this alert action.
  10. For each input, drag a field from the Component Library to the center panel, then specify its properties in the Property Editor.
  11. Optionally, click the Add-on Setup Parameters tab to define any parameters that are required for users to configure your add-on.
    • Select predefined options to prompt for account, proxy, or logging settings.
    • Add custom inputs by dragging fields from the Component Library to the center panel panel. Select an input to specify its properties in the Property Editor.
    • For more about setup pages, see Create a setup page.

  12. Click Next.
  13. On the Alert Action Parameters tab, in the Code Editor panel edit the Python code to create your alert action.
    • Find the comment # TODO: Implement your alert action logic here, which indicates where to add your code.
    • Use the Python helper functions, which are dynamically generated as commented code, as a guide to working with the input parameters you defined in the previous step.
    • For example Python code showing how to create an adaptive response, see Walkthrough: Create an ES adaptive response action on the Splunk Developer Portal.
  14. On the Alert Action Parameters tab, enter sample values for testing this alert action.
  15. If you created a setup page, on the Add-on Setup Parameters tab enter sample values to test the setup page.
  16. Click Test to test your code and the alert action configuration.
    The Output section indicates whether the command succeeded or failed.
  17. Click Save to save the alert action, then click Finish.


You should also test and validate your response action in Enterprise Security. For more, see Validate your response action in Enterprise Security on the Splunk Developer Portal.

Pass values from setup parameters

When referring to setup parameters, you must include a namespace string before the parameter name to get the value from the parameter. The following shows an example, where param_name is the parameter name:

${__settings__.additional_parameters.param_name}

For example, let's say you have a text input on your setup page that prompts the user for an API token, with the internal name "api_token". To pass the value of the API token to the REST call, use the following format:

api-key=${__settings__.additional_parameters.api_token}

We recommend you do not set account, proxy, or logging fields directly. You can access the global account values as follows:

${global_account.username}
{{global_account.username}}

${global_account.password}
{{global_account.password}}

Read user credentials from multiple accounts

Alert actions do not support the Global Account input field. When you have alert actions that require different user credentials for different accounts, such as one account for production and one for development, you can set up your alert actions to read specific user credentials from the setup page.

The following workflow shows one way to read multiple credentials of a setup page.

  1. Create an alert action.
  2. When creating a setup page on the Add-on Setup Page Parameters tab in the Create Alert Action wizard, select Add Global account settings to prompt users to add credentials for one or more accounts.
  3. When defining the input variables for the alert action, add a Text field that prompts for the username of an account. The value of this text field acts as a dictionary key to look up the corresponding credentials from the setup page.
  4. When defining the code for the alert action, use the following code to retrieve a username and password from the setup page.
    • Use the same internal name (replace "internal_name" below) that you used for the text field from the previous step:

      account = helper.get_user_credential(helper.get_arg("internal_name"))

      The data returned by the helper.get_user_credential function is a JSON dictionary, so retrieve the username and password from the account dictionary as follows:

      username = account["username"]
      password = account["password"]
  5. Save your alert action, then restart Splunk Enterprise.

For more, see the Python helper functions.

Test your alert action

To test your alert action, you can use the sendalert command as follows using a hard-coded value:

  1. Build your alert action and save it.
  2. Restart Splunk Enterprise.
  3. Use sendalert command as follows
index=_internal | head 1| eval fieldname="xyz" | sendalert myalertname param.abc="myvalue"


To pass search result values dynamically to different alert action parameters, use the $result.fieldname$ format as folows:

index=_internal | head 1| eval fieldname="xyz" | sendalert myalertname param.abc="$result.fieldname$"


For a list of possible alert action tokens, see Pass search result values to alert action tokens in the Developing Views and Apps for Splunk Web manual.

End-to-end walkthroughs

For end-to-end walkthroughs, see the Splunk Developer Portal.

Learn more

For more information, see the following documentation:

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This documentation applies to the following versions of Splunk® Add-on Builder: 2.2.0


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