Logstash 算术运算操作

需求：input为json，output为ES，需使用filter提取json中的某个字段，并执行加法、加法、乘法等算法操作

思路：mutate过滤器+ruby过滤器实现

避坑：根据ES及Logstash版本 参考官网API

配置：

input

{"timestamp": 1538545228,"rect_id": 205,"serial_no":"OSDC5W9O","location_id":"214_332_123","device_item_id": 113,"device_id": 13,"tenant_id": 2324,"mac_address": "sd3lk2l4l2b4","slave_id": "004","iot_id":"8bf6f72267d951cb87ffd72f982959e1","metric": {"device_status": 0,"g_sensor": 0,"weight": 420,"humidity": 50,"env_temp": 50,"pig_temp": 45,"sow_action": 3,"boar_action": 3,"distance_1": 120,"distance_2": 100,"distance_vertical": 80,"NH3": 0.05,"CO2": 0.1,"illumination": 8.1}}

output

{
           "timestamp" => 1538582828,
             "rect_id" => 200,
           "device_id" => 13,
            "@version" => "1",
           "tenant_id" => 2324,
      "device_item_id" => 113,
          "@timestamp" => 2018-10-05T00:45:39.857Z,
              "iot_id" => "8bf6f72267d951cb87ffd72f982959e1",
                "type" => "logstash-kafka",
              "metric" => {
            "device_status" => 0,
                 "g_sensor" => 0,
                 "humidity" => 50,
               "distance_1" => 120,
                   "weight" => 420,
                 "pig_temp" => 45,
               "sow_action" => 3,
              "boar_action" => 3,
        "distance_vertical" => 80,
                      "CO2" => 0.1,
             "illumination" => 8.1,
               "distance_2" => 100,
                 "env_temp" => 50,
                      "NH3" => 0.05
    },
           "serial_no" => "OSDC5W9O",
         "mac_address" => "sd3lk2l4l2b4",
         "location_id" => "214_332_123",
    "timestamp_origin" => 1538554028,
            "slave_id" => "004"
}

input {
    kafka {
        bootstrap_servers => ["xxxxxx:9092,xxxxxx:9092"] #替换为自己的Kafka集群地址
        client_id => "logstash-172.19.100.180"
        group_id => "logstash-dev"
        auto_offset_reset => "latest" #smallest
        consumer_threads => 5
        decorate_events => true
        topics => ["zds-iot-topic"]
        type => "logstash-kafka"
        codec => "json"
    }
}
filter {
   if [type] == "logstash-kafka" {
     mutate {
       copy => { "timestamp" => "timestamp_origin" }
     }
     # Add 8 hours
     ruby {code => "event.set('timestamp', event.get('timestamp').to_i + 28800)"}
  }
}

output {
    if [type] == "java_log" {
       elasticsearch {
        hosts => ["xx.xx.xx.xx:9200"]
        index => "javaapp_log_index"
      }
    }
    if [type] == "logstash-kafka" {
       elasticsearch {
        hosts => ["xx.xx.xx.xx:9200"]
        index => "iot_data"
        document_type => "sensor"
      }
    }
    stdout { }
}