Add cgroup version

telemetry.go

@@ -87,6 +87,12 @@ func Run(startTime time.Time, serviceName string, license string) (stats *Stats,
 		log.Warn().Err(err).Msg("Failed to get OS release")
 	}
 
+	cgroupVersion, err := getCgroupVersion()
+	if err != nil {
+		log.Warn().Err(err).Msg("Failed to get cgroup version")
+		cgroupVersion = "none"
+	}
+
 	cpuUsage := getCPUUsage()
 	cpuNum := getCPUNum()
 	memAlloc, memSys := getMemoryUsage()
@@ -103,6 +109,7 @@ func Run(startTime time.Time, serviceName string, license string) (stats *Stats,
 		Hostname:      strings.TrimSpace(hostname),
 		KernelDetails: kernelDetails,
 		OSRelease:     osRelease,
+		CgroupVersion: cgroupVersion,
 	}
 
 	err = emitMetrics(stats, serviceName, license)

types.go

@@ -12,4 +12,5 @@ type Stats struct {
 	Hostname      string        `json:"hostname"`
 	KernelDetails string        `json:"kernelDetails"`
 	OSRelease     string        `json:"osRelease"`
+	CgroupVersion string        `json:"cgroupVersion"`
 }

utils.go

@@ -4,6 +4,7 @@ import (
 	"os"
 	"os/exec"
 	"runtime"
+	"strings"
 
 	"github.com/struCoder/pidusage"
 )
@@ -58,3 +59,22 @@ func getOSRelease() (string, error) {
 
 	return string(output), nil
 }
+
+func getCgroupVersion() (string, error) {
+	data, err := os.ReadFile("/proc/mounts")
+	if err != nil {
+		return "", err
+	}
+
+	lines := strings.Split(string(data), "\n")
+	for _, line := range lines {
+		fields := strings.Fields(line)
+		if len(fields) >= 2 && strings.Contains(fields[1], "cgroup2") {
+			return "v2", nil
+		} else if len(fields) >= 2 && strings.Contains(fields[1], "cgroup") {
+			return "v1", nil
+		}
+	}
+
+	return "", nil
+}