event-handler

Creates or accesses an event-handler profile, which can execute a Python script when a specified trigger occurs.

Syntax

event-handler event-handler-name [ action python-script file-name ]
event-handler event-handler-name [ description description-text ]
event-handler event-handler-name [ trigger trigger-id raslog raslog-id [ pattern posix-ext-regex ] ]
no event-handler event-handler-name

Command Default

No event-handler profile is enabled.

Parameters

event-handler-name
Specifies the name of the event-handler profile. Valid values can have from 1 through 32 characters. The first character must be alphabetic.
action python-script file-name
Specifies a Python file that runs when a trigger-condition occurs. Valid values range from 4 through 32 characters (including the .py extension). The first character must be alphanumeric.
description description-text
Specifies a string describing the event-handler profile. The string can be 1 through 128 ASCII characters in length. Do not use the ? character. If you need to use ! or \, precede each with \.
trigger trigger-id
Defines an event-handler trigger and specifies an ID number for the trigger. Valid values are 1 through 100, and must be unique per event-handler profile. When the trigger-condition occurs, a Python script is run.
raslog raslog-id
Specifies a RASlog message ID as the trigger.
pattern posix-ext-regex
Specifies a POSIX extended regular expression to search for a match within the specified RASlog message ID. For examples, refer to the "trigger" topic.

Modes

Global configuration mode

Event-handler configuration mode for an existing event handler. (There is no need to enter the exit command to return to global configuration mode.)

Usage Guidelines

You can create multiple event-handler profiles.

You can optionally specify a description, a trigger, or the Python script with this command; or specify them later.

An event-handler command creates or accesses an event-handler profile and can also define one of the following parameters:
  • Description
  • One trigger
  • The Python-script action that runs on any trigger
You can also define the above parameters—including one or more triggers—from event-handler configuration mode.
A Python event-handler script runs only if all of the following occur:
  • Using the copy command, copy the Python file to the flash:// location on the device.
  • Using the event-handler command, create an event-handler profile.
  • Either using the event-handler command or in configuration mode for that profile:
    • Using the trigger command, create one or more triggers.
    • Using the action command, specify the Python script that will be triggered.
  • Using the event-handler activate command, activate an instance of the event handler.
  • The trigger event occurs.

If an event-handler profile is not activated, the no form of this command deletes it.

Examples

The following example creates an event-handler profile and accesses its configuration mode. 

device# configure terminal
device(config)# event-handler eventHandler1
device(config-event-handler-eventHandler1)#
9039216-00 Rev AA