Question

我在Logstash中遇到了关于JSON的问题。我有一个看起来像这样的JSON输入：

{
"2": {
        "name": "name2",
        "state": "state2"
    },

"1": {
        "name": "name1",
        "state": "state1"
    },

"0": {
        "name": "name0",
        "state": "state0"
    }
}

现在，让我们说我想在logstash配置中添加一个字段

json{
    source => "message"
    add_field => {
            "NAME" => "%{ What to write here ?}"
            "STATE" => "%{ What to write here ?}"
    }
}

有没有办法访问JSON输入，这样我得到一个名为name1的字段名，另一个名为2的字段和一个名为3的第三个字段.JSON中的第一个键正在改变，这意味着只能是一个或多个部分。所以我不想像

那样硬编码

%{[0][name]}

感谢您的帮助。

Answer 1

If you remove all new lines in your input you can simply use the json filter. You don't need any add_field action.

Working config without new lines:

filter {
        json { source => message }
}

If you can't remove the new lines in your input you need to merge the lines with the multiline codec.

Working config with new lines:

input {   
    file {
        path => ["/path/to/your/file"] # I suppose your input is a file.
        start_position => "beginning"
        sincedb_path => "/dev/null" # just for testing
        codec => multiline {
            pattern => "^}"
            what => "previous"
            negate => "true"
        }
    }
}

filter {
    mutate { replace => { "message" => "%{message}}" }  }
    json { source => message }
}

I suppose that you use the file input. In case you don't, just change it.

Output (for both):

"2" => {
     "name" => "name2",
    "state" => "state2"
},
"1" => {
     "name" => "name1",
    "state" => "state1"
},
"0" => {
     "name" => "name0",
    "state" => "state0"
}

在Logstash中使用变量键名访问嵌套的JSON值

1 个答案: