1.切换到插件目录

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cd logstash-5.2.2/vendor/bundle/jruby/1.9/gems/

2.生成模板插件

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logstash-plugin generate --type filter --name alioss --path ./

3.配置 logstash-5.2.2/Gemfile 文件，添加一条

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gem "logstash-filter-alioss", :path => "vendor/bundle/jruby/1.9/gems/logstash-filter-alioss"

4.验证 

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logstash -e 'input { stdin { } } filter { alioss{ } } output { stdout {codec=>rubydebug} }'

会得到如下结果

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{
	"@timestamp" => 2017-03-14T09:32:23.423Z,
	"@version" => "1",
	"host" => "renyufengdeMacBook-Pro.local",
	"message" => "Hello World!"
}