ElasticSearch使用笔记

1.分组去重统计，先按照policyName统计每个policyName数量，再安装alarmId统计policyName下面每个alarmId数量。

GET logstash-alarmtimer-logs-2018.10.*/_search
{
  "size": 0,
  "query": {
    "range": {
      "ctime": {
        "gte": 1540378800000
      }
    }
  },
  "aggs": {
    "all_alarms": {
      "terms": {
        "field": "policyName.keyword"
      },
      "aggs": {
        "distinct_alarms": {
          "cardinality": {
            "field": "alarmId.keyword"
          }
        }
      }
    }
  }
}

2.分组求和统计，先统计每个policyName的数量，再统计每个policyName下面所有counter求和数值。

GET logstash-alarmtimer-logs-2018.10.*/_search
{
  "size": 0,
  "query": {
    "range": {
      "ctime": {
        "gte": 1540378800000
      }
    }
  },
  "aggs": {
    "all_alarms": {
      "terms": {
        "field": "policyName.keyword"
      },
      "aggs": {
        "sum_alarms": {
          "sum": {
            "field": "counter"
          }
        }
      }
    }
  }
}