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This article is about how to write prober plug-ins, the editor feels very practical, so share with you to learn, I hope you can get something after reading this article, say no more, follow the editor to have a look.

The prober plug-in collects management data through API. Currently, there are plug-ins:

Elasticsearch

Github

Haproxy

Mongodb

Mysql

Nginx

Prometheus

Rabbitmq

Redis

Tengine

Zookeeper

The prober plug-in uses telegraf

(encapsulated by https://www.influxdata.com/time-series-platform/telegraf/T) plug-in interface, you can:

Directly encapsulate a telegraf

Write a telegraf plug-in, and then package it into a prober plug-in

Next, take src/modules/monapi/plugins/demo as an example to introduce the development of plug-ins.

Security tips for Telegraf plug-in development

You need to implement one of these interface types:

The following is the implementation of the demo plug-in:

So you have a plug-in for telegraf, and then package it as a prober plug-in.

The acc in the Gather method in the plug-in is an interface, and the specific example is provided by the running environment. When running the plug-in in prober, the implementation of acc is in src/modules/prober/manager/accumulator.go.

Prober

Prober periodically fetches the collectRule list from monapi to check and update its own plug-in instances.

Create rule collector

Update rule collector

Delete rule collector

Among them, update rule is implemented by delete old,create new.

The reason why monapi needs to load the plug-in is that it needs to obtain the parameter description of the plug-in so that it can render an appropriate UI interface and facilitate user input. This is the parameter description of demo:

The information about ui is described in the tag of structField. The detailed tag is as follows:

In this way, after mapapi gets the structure, it can know how to render, fill in the parameters in the structure, and then store the data entered by the user in the database and distribute it to each prober for execution.

After prober acquires the rules, the rule is converted into a telegraf.Input instance through the plug-in's TelegrafInput method.

test

Src/modules/monapi/plugins/demo/demo_test.go

Deploy built-in compilation

Modify src/modules/monapi/plugins/all/all.go and add demo

Recompile monapi & prober

Plug-in loading

Compile your plug-in into a dynamic library file (.so) and copy it to plugins/ under the working directory of monapi & prober

The above is how to write the prober plug-in, the editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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