add missing fields to targets API

Signed-off-by: yeya24 <[email protected]>

Author: yeya24

api/prometheus/v1/api.go

@@ -380,12 +380,15 @@ type TargetsResult struct {
 
 // ActiveTarget models an active Prometheus scrape target.
 type ActiveTarget struct {
-	DiscoveredLabels map[string]string `json:"discoveredLabels"`
-	Labels           model.LabelSet    `json:"labels"`
-	ScrapeURL        string            `json:"scrapeUrl"`
-	LastError        string            `json:"lastError"`
-	LastScrape       time.Time         `json:"lastScrape"`
-	Health           HealthStatus      `json:"health"`
+	DiscoveredLabels   map[string]string `json:"discoveredLabels"`
+	Labels             model.LabelSet    `json:"labels"`
+	ScrapePool         string            `json:"scrapePool"`
+	ScrapeURL          string            `json:"scrapeUrl"`
+	GlobalURL          string            `json:"globalUrl"`
+	LastError          string            `json:"lastError"`
+	LastScrape         time.Time         `json:"lastScrape"`
+	LastScrapeDuration float64           `json:"lastScrapeDuration"`
+	Health             HealthStatus      `json:"health"`
 }
 
 // DroppedTarget models a dropped Prometheus scrape target.

api/prometheus/v1/api_test.go

@@ -871,10 +871,13 @@ func TestAPIs(t *testing.T) {
 							"instance": "127.0.0.1:9090",
 							"job":      "prometheus",
 						},
-						"scrapeUrl":  "http://127.0.0.1:9090",
-						"lastError":  "error while scraping target",
-						"lastScrape": testTime.UTC().Format(time.RFC3339Nano),
-						"health":     "up",
+						"scrapePool":         "prometheus",
+						"scrapeUrl":          "http://127.0.0.1:9090",
+						"globalUrl":          "http://127.0.0.1:9090",
+						"lastError":          "error while scraping target",
+						"lastScrape":         testTime.UTC().Format(time.RFC3339Nano),
+						"lastScrapeDuration": 0.001146115,
+						"health":             "up",
 					},
 				},
 				"droppedTargets": []map[string]interface{}{
@@ -901,10 +904,13 @@ func TestAPIs(t *testing.T) {
 							"instance": "127.0.0.1:9090",
 							"job":      "prometheus",
 						},
-						ScrapeURL:  "http://127.0.0.1:9090",
-						LastError:  "error while scraping target",
-						LastScrape: testTime.UTC(),
-						Health:     HealthGood,
+						ScrapePool:         "prometheus",
+						ScrapeURL:          "http://127.0.0.1:9090",
+						GlobalURL:          "http://127.0.0.1:9090",
+						LastError:          "error while scraping target",
+						LastScrape:         testTime.UTC(),
+						LastScrapeDuration: 0.001146115,
+						Health:             HealthGood,
 					},
 				},
 				Dropped: []DroppedTarget{