logstash 处理多行

2.2.2 多行事件编码:
zjtest7-frontend:/usr/local/logstash-2.3.4/bin# ./plugin list | grep multi
Ignoring ffi-1.9.13 because its extensions are not built.  Try: gem pristine ffi --version 1.9.13
logstash-codec-multiline
logstash-filter-multiline

zjtest7-frontend:/usr/local/logstash-2.3.4/config# cat multi.comf
input {
  stdin {
  codec =>multiline {
  pattern =>"^\["
  negate=>true
  what=>"previous"
 }

}
}

output {
 stdout {
  codec=>rubydebug{}
   }
 }

/**********************

zjtest7-frontend:/usr/local/logstash-2.3.4/config# ../bin/logstash -f multi.comf
Settings: Default pipeline workers: 1
Pipeline main started
[Aug/25/08 12:12:12] hello world

此时为了 敲回车没反应,因为\n并不匹配是设置的^\[ 正则表达式,logstash 还得等下一行数据直到匹配成功后才会输出这个事件

zjtest7-frontend:/usr/local/logstash-2.3.4/config# ../bin/logstash -f multi.comf
Settings: Default pipeline workers: 1
Pipeline main started
[Aug/25/08 12:12:12] hello world
[Aug 9527]
{
    "@timestamp" => "2016-08-25T06:29:31.182Z",
       "message" => "[Aug/25/08 12:12:12] hello world",
      "@version" => "1",
          "host" => "0.0.0.0"
}

zjtest7-frontend:/usr/local/logstash-2.3.4/config# ../bin/logstash -f multi.comf
Settings: Default pipeline workers: 1
Pipeline main started
[Aug/08/08 14:54:03] hellow world
[Aug/08/09 14:54:04] hello logstash
{
    "@timestamp" => "2016-08-25T06:33:14.623Z",
       "message" => "[Aug/08/08 14:54:03] hellow world",
      "@version" => "1",
          "host" => "0.0.0.0"
}
hello best practice
hello raochelin
[Aug/09/10] the end
{
    "@timestamp" => "2016-08-25T06:34:01.344Z",
       "message" => "[Aug/08/09 14:54:04] hello logstash\nhello best practice\nhello raochelin",
      "@version" => "1",
          "tags" => [
        [0] "multiline"
    ],
          "host" => "0.0.0.0"
}

这个插件很简单,就是把当前行的数据添加到前面一行后面,直到新进的当前行匹配^\[正则为止。