January 2023
Intermediate to advanced
458 pages
14h 16m
Chinese
Content preview from 可编程网络自动化
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362
｜
第
9
章
9.4.4
传感器和触发器
动作和工作流各有用处，但为了实现事件驱动自动化，需要采集基础设施相关的信息并识
别何时会发生可操作的事件。这是通过传感器和触发器实现的。传感器是少量
Python
代
码，通过定期轮询
REST
API
或订阅消息队列等方式将外部数据带入
StackStorm
。
StackStorm
还允许配置传入的
webhook
，使得外部系统能够向
StackStorm
“推送”事件（传感器提供了更多的“拉取”式集成模型）。
传感器是首选的集成方法，因为其集成效果更细化且更紧密，但是
webhook
提供了一种简单的集成机制，使你可以快速地将数据输入
StackStorm
。当所
用的系统尚未建立传感器或只提供了外向（
outgoing
）
webhook
作为集成机
制时，这会很有帮助。
使用
st2 sensor list
可以查看系统可用的传感器（出于简洁性考虑，使用
-pack
选项限
制仅查看
napalm
包 ）。
vagrant@st2vagrant:~$ st2 sensor list --pack=napalm
+-------------------------+--------+----------------------------------------------+---------+
| ref | pack | description | enabled |
+-------------------------+--------+----------------------------------------------+---------+ ...
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