diagnostics: added api to get sys info data (#11589)

diagnostics/sysinfo.go

@@ -17,9 +17,11 @@
 package diagnostics
 
 import (
+	"encoding/json"
 	"net/http"
 
 	diaglib "github.com/ledgerwatch/erigon-lib/diagnostics"
+	"github.com/ledgerwatch/erigon-lib/sysutils"
 )
 
 func SetupSysInfoAccess(metricsMux *http.ServeMux, diag *diaglib.DiagnosticClient) {
@@ -32,8 +34,41 @@ func SetupSysInfoAccess(metricsMux *http.ServeMux, diag *diaglib.DiagnosticClien
 		w.Header().Set("Content-Type", "application/json")
 		writeHardwareInfo(w, diag)
 	})
+
+	metricsMux.HandleFunc("/cpu-usage", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		writeCPUUsage(w)
+	})
+
+	metricsMux.HandleFunc("/processes-info", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		writeProcessesInfo(w)
+	})
+
+	metricsMux.HandleFunc("/memory-info", func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Access-Control-Allow-Origin", "*")
+		w.Header().Set("Content-Type", "application/json")
+		writeMemoryInfo(w)
+	})
 }
 
 func writeHardwareInfo(w http.ResponseWriter, diag *diaglib.DiagnosticClient) {
 	diag.HardwareInfoJson(w)
 }
+
+func writeCPUUsage(w http.ResponseWriter) {
+	cpuusage := sysutils.CPUUsage()
+	json.NewEncoder(w).Encode(cpuusage)
+}
+
+func writeProcessesInfo(w http.ResponseWriter) {
+	processes := sysutils.GetProcessesInfo()
+	json.NewEncoder(w).Encode(processes)
+}
+
+func writeMemoryInfo(w http.ResponseWriter) {
+	totalMemory := sysutils.TotalMemoryUsage()
+	json.NewEncoder(w).Encode(totalMemory)
+}