Simple Log Service：MetricStore HTTP API詳情

Instant Queries API

Instant Queries API用於查詢指定時間點的指標資料。

GET https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/query
POST https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/query

參數說明如下表所示。

• 範例程式碼

  curl -X GET 'https://haoqi-sls-metric-test.pub-cn-hangzhou.log.aliyuncs.com/prometheus/haoqi-sls-metric-test/prometheus-metrics/api/v1/query?query=up&time=1676700699' \
  -u username:password \
  -H 'Content-Type: application/x-www-form-urlencoded'
  
  # 設定username和password為阿里雲AccessKey。

• 查詢結果

  {
      "status": "success",
      "data": {
          "resultType": "vector",
          "result": [
              {
                  "metric": {
                      "__name__": "up",
                      "instance": "demo.promlabs.com:10001",
                      "job": "demo"
                  },
                  "value": [
                      1676700550.696,
                      "1"
                  ]
              },
              {
                  "metric": {
                      "__name__": "up",
                      "instance": "demo.promlabs.com:10000",
                      "job": "demo"
                  },
                  "value": [
                      1676700550.696,
                      "1"
                  ]
              }
          ]
      }
  }

Range Queries API

Range Queries API用於查詢指定時間範圍內多個時間點的指標資料。

GET https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/query_range
POST https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/query_range

參數說明如下表所示。

• 範例程式碼

  查詢2023-02-18 14:09:59到2023-02-18 14:16:39之間的指標資料，step為60s。

  curl -X GET 'https://haoqi-sls-metric-test.pub-cn-hangzhou.log.aliyuncs.com/prometheus/haoqi-sls-metric-test/prometheus-metrics/api/v1/query_range?query=up&start=1676700599&end=1676700999&step=60s' \
  -u username:password \
  -H 'Content-Type: application/x-www-form-urlencoded'
  
  # 設定username和password為阿里雲AccessKey。

• 查詢結果

  {
    "status": "success",
    "data": {
      "resultType": "matrix",
      "result": [
        {
          "metric": {
            "__name__": "up",
            "instance": "demo.promlabs.com:10000",
            "job": "demo"
          },
          "values": [
            [
              1676700599,
              "1"
            ],
            [
              1676700659,
              "1"
            ],
            [
              1676700719,
              "0"
            ],
            [
              1676700779,
              "0"
            ],
            [
              1676700839,
              "1"
            ],
            [
              1676700899,
              "0"
            ],
            [
              1676700959,
              "1"
            ]
          ]
        },
        {
          "metric": {
            "__name__": "up",
            "instance": "demo.promlabs.com:10001",
            "job": "demo"
          },
          "values": [
            [
              1676700599,
              "1"
            ],
            [
              1676700659,
              "1"
            ],
            [
              1676700719,
              "0"
            ],
            [
              1676700779,
              "0"
            ],
            [
              1676700839,
              "1"
            ],
            [
              1676700899,
              "1"
            ],
            [
              1676700959,
              "1"
            ]
          ]
        }
      ]
    }
  }

Query Series API

Query Series API用於查詢指定時間段內特定條件下的所有MetricName以及該MetricName下所有的Label數值對。

GET https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/series
POST https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/series

參數說明如下表所示。

• 配置樣本

  curl -g -X GET 'https://haoqi-sls-metric-test.pub-cn-hangzhou.log.aliyuncs.com/prometheus/haoqi-sls-metric-test/prometheus-metrics/api/v1/series?match[]=up{instance="demo.promlabs.com:10000"}&match[]=go_sched_latencies_seconds_bucket&start=1676700599&end=1676700999' \
  -u username:password \
  -H 'Content-Type: application/x-www-form-urlencoded'
  
  # 設定username和password為阿里雲AccessKey。

• 查詢結果

  {
      "status": "success",
      "data": [
          {
              "__name__": "go_gc_duration_seconds_count",
              "instance": "demo.promlabs.com:10000",
              "job": "demo"
          },
          {
              "__name__": "go_gc_duration_seconds_count",
              "instance": "demo.promlabs.com:10001",
              "job": "demo"
          },
          {
              "__name__": "up",
              "instance": "demo.promlabs.com:10000",
              "job": "demo"
          }
      ]
  }

Query Label Names API

查詢指定時間段內特定條件下所有的LabelName。

GET https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/labels
POST https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/labels

參數說明如下表所示。

• 配置樣本

  查詢指定時間段內所有Metric的LabelName資訊。

  curl -X GET 'https://haoqi-sls-metric-test.pub-cn-hangzhou.log.aliyuncs.com/prometheus/haoqi-sls-metric-test/prometheus-metrics/api/v1/labels?start=1676700599&end=1676700999' \
  -u username:password \
  -H 'Content-Type: application/x-www-form-urlencoded'
  
  # 設定username和password為阿里雲AccessKey。

• 查詢結果

  {
      "status": "success",
      "data": [
          "code",
          "instance",
          "job",
          "le",
          "method",
          "mode",
          "path",
          "quantile",
          "status",
          "type",
          "version",
          "__name__"
      ]
  }

Query Label Values API

Query Label Values API用於查詢指定時間段內特定條件以及特定LabelName下所有的LabelValue資訊。

GET https://{project}.{sls-endpoint}/prometheus/{project}/{metricstore}/api/v1/label/<label_name>/values

參數說明如下表所示。

• 配置樣本

  查詢指定時間段內up指標中，instance Label下所有LabelValue。

  curl -X GET 'https://haoqi-sls-metric-test.pub-cn-hangzhou.log.aliyuncs.com/prometheus/haoqi-sls-metric-test/prometheus-metrics/api/v1/label/instance/values?match[]=up&start=1676700599&end=1676700999' \
  -u username:password \
  -H 'Content-Type: application/x-www-form-urlencoded'
  
  # 設定username和password為阿里雲AccessKey。

• 查詢結果

  {
      "status": "success",
      "data": [
          "demo.promlabs.com:10000",
          "demo.promlabs.com:10001",
          "demo.promlabs.com:10002"
      ]
  }

通過HTTP方式訪問查詢API

import (
	"flag"
	"fmt"
	"io/ioutil"
	"net/http"
	"net/url"
	"strconv"
	"strings"
	"time"
)

const separator = "#"

func http_main() {

	project := flag.String("project", "xxxx", "")
	metricStore := flag.String("metricstore", "xxxx", "")
	endpoint := flag.String("endpoint", "xxxx", "")
	akId := flag.String("akid", "xxxx", "")
	akKey := flag.String("aksecret", "xxxx", "")
	query := flag.String("query", "avg(up)", "")
	queryType := flag.String("type", "values", "range or query or labels or values or series")
	matches := flag.String("match", "up", "") // 多個match[]參數使用#進行串連。
	labelName := flag.String("label", "instance", "")
	step := flag.String("step", "1m", "")
	fromtime := flag.String("from", "2023-02-15T00:00:00Z", "time 2006-01-02T15:04:05Z07:00")
	totime := flag.String("to", "2023-02-15T00:15:00Z", "time 2006-01-02T15:04:05Z07:00")

	flag.Parse()

	timeFrom, err := time.Parse(time.RFC3339, *fromtime)
	if err != nil {
		panic(err)
	}
	timeTo, err := time.Parse(time.RFC3339, *totime)
	if err != nil {
		panic(err)
	}

	// URL：https://{project}.{sls-enpoint}/prometheus/{project}/{metricstore}
	prometheusEndpoint := fmt.Sprintf("https://%s/prometheus/%s/%s", *project+"."+*endpoint, *project, *metricStore)

	var uri string
	urlVal := url.Values{}
	urlVal.Add("start", strconv.FormatInt(timeFrom.Unix(), 10))
	urlVal.Add("end", strconv.FormatInt(timeTo.Unix(), 10))

	switch *queryType {
	case "range":
		urlVal.Add("query", *query)
		urlVal.Add("step", *step)
		uri = fmt.Sprintf("%s/api/v1/query_range?%v", prometheusEndpoint, urlVal.Encode())
	case "query":
		urlVal.Add("query", *query)
		urlVal.Add("time", strconv.FormatInt(timeTo.Unix(), 10))
		uri = fmt.Sprintf("%s/api/v1/query?%v", prometheusEndpoint, urlVal.Encode())
	case "labels":
		extractAddMatches(*matches, urlVal)
		uri = fmt.Sprintf("%s/api/v1/labels?%v", prometheusEndpoint, urlVal.Encode())
	case "values":
		extractAddMatches(*matches, urlVal)
		uri = fmt.Sprintf("%s/api/v1/label/%s/values?%v", prometheusEndpoint, *labelName, urlVal.Encode())
	case "series":
		extractAddMatches(*matches, urlVal)
		uri = fmt.Sprintf("%s/api/v1/series?%v", prometheusEndpoint, urlVal.Encode())
	}

	req, _ := http.NewRequest(http.MethodGet, uri, nil)
	req.SetBasicAuth(*akId, *akKey)

	resp, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	buf, err := ioutil.ReadAll(resp.Body)
	resp.Body.Close()
	if err != nil {
		panic(err)
	}

	fmt.Println(string(buf))

}

func extractAddMatches(matches string, uVal url.Values) {
	splits := strings.Split(matches, separator)
	for _, match := range splits {
		uVal.Add("match[]", match)
	}
}

通過Prometheus SDK訪問查詢API

本樣本基於Prometheus client_golangv1.14.0版本。

import (
	"context"
	"flag"
	"fmt"
	"github.com/prometheus/client_golang/api"
	v1 "github.com/prometheus/client_golang/api/prometheus/v1"
	"net"
	"net/http"
	"net/url"
	"time"
)

func main() {
	project := flag.String("project", "xxxx", "")
	metricStore := flag.String("metricstore", "xxxx", "")
	endpoint := flag.String("endpoint", "xxxx", "")
	akId := flag.String("akid", "xxxx", "")
	akKey := flag.String("aksecret", "xxxx", "")
	flag.Parse()

	// URL：https://{project}.{sls-enpoint}/prometheus/{project}/{metricstore}
	prometheusEndpoint := fmt.Sprintf("https://%s.%s/prometheus/%s/%s", *project, *endpoint, *project, *metricStore)

	client, err := api.NewClient(api.Config{
		Address: prometheusEndpoint,
		RoundTripper: &http.Transport{
			// set basic auth
			Proxy: func(req *http.Request) (*url.URL, error) {
				req.SetBasicAuth(*akId, *akKey)
				return nil, nil
			},
			DialContext: (&net.Dialer{
				Timeout:   60 * time.Second,
				KeepAlive: 60 * time.Second,
			}).DialContext,
			TLSHandshakeTimeout: 10 * time.Second,
		},
	})
	if err != nil {
		panic(err)
	}

	v1api := v1.NewAPI(client)
	ctx, _ := context.WithTimeout(context.Background(), 60*time.Second)
	r := v1.Range{
		Start: time.Now().Add(-15 * time.Minute),
		End:   time.Now(),
		Step:  time.Minute,
	}
	// query range
	result, warnings, err := v1api.QueryRange(ctx, "avg(up)", r)
	if err != nil {
		panic(err)
	}
	if len(warnings) > 0 {
		fmt.Printf("Warnings: %v %v\n", warnings, result)
	}
	fmt.Println(result)

	// query
	result, warnings, err = v1api.Query(ctx, "avg(up)", time.Now())
	if err != nil {
		panic(err)
	}
	if len(warnings) > 0 {
		fmt.Printf("Warnings: %v %v\n", warnings, result)
	}
	fmt.Println(result)

	// series
	series, warnings, err := v1api.Series(ctx, []string{"up"}, time.Now().Add(-15*time.Minute), time.Now())
	if err != nil {
		panic(err)
	}
	if len(warnings) > 0 {
		fmt.Printf("Warnings: %v %v\n", warnings, result)
	}
	fmt.Println(series)

	// labels
	names, warnings, err := v1api.LabelNames(ctx, []string{"up"}, time.Now().Add(-15*time.Minute), time.Now())
	if err != nil {
		panic(err)
	}
	if len(warnings) > 0 {
		fmt.Printf("Warnings: %v %v\n", warnings, result)
	}
	fmt.Println(names)

	// labelValues
	values, warnings, err := v1api.LabelValues(ctx, "instance", []string{"up"}, time.Now().Add(-15*time.Minute), time.Now())
	if err != nil {
		panic(err)
	}
	if len(warnings) > 0 {
		fmt.Printf("Warnings: %v %v\n", warnings, result)
	}
	fmt.Println(values)
}

鑒權失敗

返回如下資訊時，表示鑒權失敗，請修改您輸入的AccessKey。

{
    "status": "error",
    "errorType": "unauthorized",
    "error": "get query instance error: {\n    \"httpCode\": 401,\n    \"errorCode\": \"Unauthorized\",\n    \"errorMessage\": \"AccessKeyId not found: xxxx\",\n    \"requestID\": \"xxxx\"\n}"
}

PromQL語句存在錯誤

返回如下資訊時，表示PromQL語句存在錯誤，請修改query參數中的查詢語句。

--> /api/v1/query_range?query=up[2m]&start=1676700599&end=1676700999&step=60s
{
    "status": "error",
    "errorType": "bad_data",
    "error": "invalid expression type \"range vector\" for range query, must be Scalar or instant Vector"
}

逾時錯誤

返回如下資訊時，表示逾時錯誤，請調高timeout參數的值。

{
    "status": "error",
    "errorType": "timeout",
    "error": "query timed out in expression evaluation"
}

查詢不完整

返回如下資訊時，表示查詢不完整，建議縮小查詢時間範圍，重新查詢。

{
    "status": "success",
    "data": {
        "resultType": "matrix",
        "result": [
            {
                "metric": {},
                "values": [
                    [
                        1673798460,
                        "11111111"
                    ],
                    [
                        1673799060,
                        "22222222"
                    ],
                    [
                        1673799660,
                        "33333333"
                    ]
                ]
            }
        ]
    },
    "warnings": [
        "Request to Sls partial incompleted, incomplete task count : 11, total : 108"
    ]
}