feat: add support to os cpu percent es v2.x

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

Author: Douglas Paz

collector/nodes.go

@@ -249,6 +249,9 @@ func NewNodes(logger log.Logger, client *http.Client, url *url.URL, all bool, no
 					defaultNodeLabels, nil,
 				),
 				Value: func(node NodeStatsNodeResponse) float64 {
+					if node.OS.CPUPercent != nil {
+						return float64(*node.OS.CPUPercent)
+					}
 					return float64(node.OS.CPU.Percent)
 				},
 				Labels: defaultNodeLabelValues,

collector/nodes_response.go

@@ -283,10 +283,11 @@ type NodeStatsOSResponse struct {
 	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"`
-	CPU     NodeStatsOSCPUResponse  `json:"cpu"`
-	Mem     NodeStatsOSMemResponse  `json:"mem"`
-	Swap    NodeStatsOSSwapResponse `json:"swap"`
+	LoadAvg    json.RawMessage         `json:"load_average"`
+	CPU        NodeStatsOSCPUResponse  `json:"cpu"`
+	CPUPercent *int64                  `json:"cpu_percent"`
+	Mem        NodeStatsOSMemResponse  `json:"mem"`
+	Swap       NodeStatsOSSwapResponse `json:"swap"`
 }
 
 // NodeStatsOSMemResponse defines node stats operating system memory usage structure