Update api structs for metrics endpoint

api/agent.go

@@ -99,10 +99,37 @@ type AgentToken struct {
 // Metrics info is used to store different types of metric values from the agent.
 type MetricsInfo struct {
 	Timestamp string
-	Gauges    []map[string]interface{}
-	Points    []map[string]interface{}
-	Counters  []map[string]interface{}
-	Samples   []map[string]interface{}
+	Gauges    []GaugeValue
+	Points    []PointValue
+	Counters  []SampledValue
+	Samples   []SampledValue
+}
+
+// GaugeValue stores one value that is updated as time goes on, such as
+// the amount of memory allocated.
+type GaugeValue struct {
+	Name   string
+	Value  float32
+	Labels map[string]string
+}
+
+// PointValue holds a series of points for a metric.
+type PointValue struct {
+	Name   string
+	Points []float32
+}
+
+// SampledValue stores info about a metric that is incremented over time,
+// such as the number of requests to an HTTP endpoint.
+type SampledValue struct {
+	Name   string
+	Count  int
+	Sum    float64
+	Min    float64
+	Max    float64
+	Mean   float64
+	Stddev float64
+	Labels map[string]string
 }
 
 // Agent can be used to query the Agent endpoints

api/agent_test.go

@@ -44,8 +44,7 @@ func TestAPI_AgentMetrics(t *testing.T) {
 		t.Fatalf("bad: %v", metrics)
 	}
 
-	name := metrics.Gauges[0]["Name"]
-	if name != "consul.runtime.alloc_bytes" {
+	if metrics.Gauges[0].Name != "consul.runtime.alloc_bytes" {
 		t.Fatalf("bad: %v", metrics.Gauges[0])
 	}
 }