add FetchLatestHostMetricValues

metrics.go

@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"
 	"net/url"
+	"strconv"
 )
 
 // MetricValue metric value
@@ -79,3 +80,35 @@ func (c *Client) FetchLatestMetricValues(hostIDs []string, metricNames []string)
 
 	return *(data.LatestMetricValues), err
 }
+
+// FetchLatestHostMetricValues fetch latest metrics
+func (c *Client) FetchLatestHostMetricValues(hostID string, metricName string, from int64, to int64) ([]MetricValue, error) {
+	v := url.Values{}
+	v.Add("name", metricName)
+	v.Add("from", strconv.FormatInt(from, 10))
+	v.Add("to", strconv.FormatInt(to, 10))
+
+	req, err := http.NewRequest("GET",
+		fmt.Sprintf("%s?%s",
+			c.urlFor(fmt.Sprintf("/api/v0/hosts/%s/metrics", hostID)).String(),
+			v.Encode()),
+		nil)
+	if err != nil {
+		return nil, err
+	}
+	resp, err := c.Request(req)
+	defer closeResponse(resp)
+	if err != nil {
+		return nil, err
+	}
+
+	var data struct {
+		MetricValues *[]MetricValue `json:"metrics"`
+	}
+	err = json.NewDecoder(resp.Body).Decode(&data)
+	if err != nil {
+		return nil, err
+	}
+
+	return *(data.MetricValues), err
+}