在Logstash中分解json数组字符串

Question

我有一个RabbitMQ以JSON格式发送3个字段，Logstash rabbitmq输入插件正在使用它。

字段之一是字符串的JSON数组，如下所示：

"content": [
  "1111",
  "2222222",
  "Test 06",
  "3",
  "3232",
  "SomeValue1"
]

1. 我如何才能将该字符串的每个条目都输入一个字段，以便可以从可用字段中快速发现和可视化在Kibana中？ 现在，我看到带有完整字符串的“内容”。

2. JSON数组字符串的大小根据另一个字段eventID而变化。 可以根据eventID将字符串中的值动态映射到特定名称吗？ 如：

    "eventID": 1, "content": [ "name1": "1111", "name2": "2222222", "name3": "Test 06", "name4": "3", "name5": "3232", "name6": "SomeValue1" ] "eventID": 2, "content": [ "othername1": "3434", "othername2": "Test 10", "othername3": "876", "othername4": "Some String7" ] 

我想在可用字段中使用name *和othername *。 任何帮助，将不胜感激。

Answer 1

首先，我将假设您的输入已经正确解析为一个数组。 出于测试目的，这意味着：

echo '{"eventID":1,"content":["a","b","c","d"]}' | bin/logstash -f test.conf 

其中test.conf是：

input {
    stdin { codec => json }
}
output {
    stdout { codec => rubydebug }
}

将输出以下内容：

{
       "eventID" => 1,
    "@timestamp" => 2017-08-03T19:39:13.054Z,
      "@version" => "1",
          "host" => "xxxxxx.local",
       "content" => [
        [0] "a",
        [1] "b",
        [2] "c",
        [3] "d"
    ]
}

如果是这种情况，那么您需要执行以下操作：

filter {
    if [eventID] == 1 {
        mutate {
            add_field => {
                "eventName" => "type1 event"
                "one0" => "%{[content][0]}"
                "one1" => "%{[content][1]}"
                "one2" => "%{[content][2]}"
                "one3" => "%{[content][3]}"
            }
            remove_field => [ "content" ]
        }
    } else if [eventID] == 2 {
        mutate {
            add_field => {
                "eventName" => "type2 event"
                "two0" => "%{[content][0]}"
                "two1" => "%{[content][1]}"
                "two2" => "%{[content][2]}"
                "two3" => "%{[content][3]}"
            }
            remove_field => [ "content" ]
        }
    }
}

会产生这样的事件：

{
       "eventID" => 1,
    "@timestamp" => 2017-08-03T19:51:02.946Z,
      "@version" => "1",
          "host" => "xxxxxxx.local",
          "one2" => "c",
     "eventName" => "type1 event",
          "one3" => "d",
          "one0" => "a",
          "one1" => "b"
}