feat: add support to os load average 1m v2.x

Signed-off-by: Douglas Paz <[email protected]>

Author: Douglas Paz

collector/nodes.go

@@ -213,6 +213,14 @@ func NewNodes(logger log.Logger, client *http.Client, url *url.URL, all bool, no
 					defaultNodeLabels, nil,
 				),
 				Value: func(node NodeStatsNodeResponse) float64 {
+					// LoadAvg was an array of per-cpu values pre-2.0, and is a float in 2.x
+					if node.OS.LoadAvg != nil {
+						// trying parse as float
+						var loadAvgAsFloat float64
+						if json.Unmarshal(*node.OS.LoadAvg, &loadAvgAsFloat) == nil {
+							return loadAvgAsFloat
+						}
+					}
 					return node.OS.CPU.LoadAvg.Load1
 				},
 				Labels: defaultNodeLabelValues,

collector/nodes_response.go

@@ -279,11 +279,9 @@ type NodeStatsIndicesCacheResponse struct {
 
 // NodeStatsOSResponse is a representation of a  operating system stats, load average, mem, swap
 type NodeStatsOSResponse struct {
-	Timestamp int64 `json:"timestamp"`
-	Uptime    int64 `json:"uptime_in_millis"`
-	// LoadAvg was an array of per-cpu values pre-2.0, and is a string in 2.0
-	// Leaving this here in case we want to implement parsing logic later
-	LoadAvg    json.RawMessage         `json:"load_average"`
+	Timestamp  int64                   `json:"timestamp"`
+	Uptime     int64                   `json:"uptime_in_millis"`
+	LoadAvg    *json.RawMessage        `json:"load_average"`
 	CPU        NodeStatsOSCPUResponse  `json:"cpu"`
 	CPUPercent *int64                  `json:"cpu_percent"`
 	Mem        NodeStatsOSMemResponse  `json:"mem"`