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[Metricbeat] Add 'query' metricset for prometheus module #15177

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[Metricbeat] Add 'query' metricset for prometheus module #15177

wants to merge 4 commits into from

Commits on Mar 18, 2020

  1. [Metricbeat] Add 'query' metricset for prometheus module

    @estherk0
    estherk0 authored and Esther Kim committed Mar 18, 2020
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  2. refactor the output structure for Prometheus query API 

    * Remove array from response body.  Original response body has an array (Vector type). It makes difficult
to query with Elasticsearch QL.
New data schema:
  "prometheus": {
    "query": {
      "mem_usage": {
        "status": "success",
        "data": {
          "resultType": "vector",
          "result": [
            {
              "metric": {},
              "reconciledValue": {
                "unixtimestamp": 1.576751116531e+09,
                "value": "2947656593408"
              }
            }
          ]
        }
      }
    }
  }
    @estherk0
    estherk0 authored and Esther Kim committed Mar 18, 2020
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  3. [Metricbeat] Support all expression query result formats 

    * reference url: https://prometheus.io/docs/prometheus/latest/querying/api/#expression-query-result-formats
    @estherk0
    estherk0 authored and Esther Kim committed Mar 18, 2020
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  4. [Metricbeat] convert numeric string to integer/float type 

    * Prometheus API returns "string" type for query result. But actual
result type is a number.
* Make it easy to use ES SQL
    @estherk0
    estherk0 authored and Esther Kim committed Mar 18, 2020
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