feat(cluster): add check network

pkg/cluster/operation/check.go

@@ -54,6 +54,7 @@ var (
 	CheckNamePortListen    = "listening-port"
 	CheckNameEpoll         = "epoll-exclusive"
 	CheckNameMem           = "memory"
+	CheckNameNet           = "network"
 	CheckNameLimits        = "limits"
 	CheckNameSysService    = "service"
 	CheckNameSELinux       = "selinux"
@@ -135,6 +136,9 @@ func checkSysInfo(opt *CheckOptions, sysInfo *sysinfo.SysInfo) []*CheckResult {
 	// check memory size
 	results = append(results, checkMem(opt, &sysInfo.Memory)...)
 
+	// check network
+	results = append(results, checkNetwork(opt, sysInfo.Network)...)
+
 	return results
 }
 
@@ -233,6 +237,29 @@ func checkMem(opt *CheckOptions, memInfo *sysinfo.Memory) []*CheckResult {
 	return results
 }
 
+func checkNetwork(opt *CheckOptions, networkDevices []sysinfo.NetworkDevice) []*CheckResult {
+	var results []*CheckResult
+	for _, netdev := range networkDevices {
+		// ignore the network devices that cannot be detected
+		if netdev.Speed == 0 {
+			continue
+		}
+		if netdev.Speed > 1000 {
+			results = append(results, &CheckResult{
+				Name: CheckNameNet,
+				Msg:  fmt.Sprintf("network speed of %s is %dMB", netdev.Name, netdev.Speed),
+			})
+		} else {
+			results = append(results, &CheckResult{
+				Name: CheckNameNet,
+				Err:  fmt.Errorf("network speed of %s is %dMB too low, needs 1GB or more", netdev.Name, netdev.Speed),
+			})
+		}
+	}
+
+	return results
+}
+
 // CheckSysLimits checks limits in /etc/security/limits.conf
 func CheckSysLimits(opt *CheckOptions, user string, l []byte) []*CheckResult {
 	var results []*CheckResult