StackStorm分析（七）Sensor说明

StackStorm介绍

       StackStorm是一个强大的自动化平台，结合DevOps和ChatOps，提供可扩展、灵活和健壮的工具链用于应用、服务和工作流的自动化能力。

 

 

Sensor

       Sensor是一系列的感应器用于接受或者监测事件，当事件发生的时候，Sensor将会通知Trigger提交事件到StackStorm。

       StackStorm定义了Sensor的接口，第三方系统可以方便的和StackStorm对接。

我们现在创建一个Sensor， 首先需要实现Python脚本sample_sensor.py:

from st2reactor.sensor.base import Sensor   class SampleSensor(Sensor):     """     * self.sensor_service         - provides utilities like             - get_logger() - returns logger instance specific to this sensor.             - dispatch() for dispatching triggers into the system.     * self._config         - contains parsed configuration that was specified as           config.yaml in the pack.     """       def setup(self):         # Setup stuff goes here. For example, you might establish connections         # to external system once and reuse it. This is called only once by the system.         pass       def run(self):         # This is where the crux of the sensor work goes.         # This is called once by the system.         # (If you want to sleep for regular intervals and keep         # interacting with your external system, you'd inherit from PollingSensor.)         # For example, let's consider a simple flask app. You'd run the flask app here.         # You can dispatch triggers using sensor_service like so:         # self.sensor_service(trigger, payload, trace_tag)         #   # You can refer to the trigger as dict         #   # { "name": ${trigger_name}, "pack": ${trigger_pack} }         #   # or just simply by reference as string.         #   # i.e. dispatch(${trigger_pack}.${trigger_name}, payload)         #   # E.g.: dispatch('examples.foo_sensor', {'k1': 'stuff', 'k2': 'foo'})         #   # trace_tag is a tag you would like to associate with the dispatched TriggerInstance         #   # Typically the trace_tag is unique and a reference to an external event.         pass       def cleanup(self):         # This is called when the st2 system goes down. You can perform cleanup operations like         # closing the connections to external system here.         pass       def add_trigger(self, trigger):         # This method is called when trigger is created         pass       def update_trigger(self, trigger):         # This method is called when trigger is updated         pass       def remove_trigger(self, trigger):      &