kubeadm: add system verification check(including kernel version check) for upgrade

Author: pacoxu

cmd/kubeadm/app/cmd/phases/upgrade/apply/preflight.go

@@ -72,6 +72,9 @@ func runPreflight(c workflow.RunData) error {
 	if err := preflight.RunRootCheckOnly(ignorePreflightErrors); err != nil {
 		return err
 	}
+	if err := preflight.RunUpgradeChecks(ignorePreflightErrors); err != nil {
+		return err
+	}
 
 	// Run CoreDNS migration check.
 	if err := upgrade.RunCoreDNSMigrationCheck(client, ignorePreflightErrors); err != nil {

cmd/kubeadm/app/cmd/phases/upgrade/node/preflight.go

@@ -54,6 +54,9 @@ func runPreflight(c workflow.RunData) error {
 	if err := preflight.RunRootCheckOnly(data.IgnorePreflightErrors()); err != nil {
 		return err
 	}
+	if err := preflight.RunUpgradeChecks(data.IgnorePreflightErrors()); err != nil {
+		return err
+	}
 
 	// If this is a control-plane node, pull the basic images.
 	if data.IsControlPlaneNode() {

cmd/kubeadm/app/preflight/checks.go

@@ -1091,6 +1091,15 @@ func RunRootCheckOnly(ignorePreflightErrors sets.Set[string]) error {
 	return RunChecks(checks, os.Stderr, ignorePreflightErrors)
 }
 
+// RunUpgradeChecks initializes checks slice of structs and call RunChecks
+func RunUpgradeChecks(ignorePreflightErrors sets.Set[string]) error {
+	checks := []Checker{
+		SystemVerificationCheck{},
+	}
+
+	return RunChecks(checks, os.Stderr, ignorePreflightErrors)
+}
+
 // RunPullImagesCheck will pull images kubeadm needs if they are not found on the system
 func RunPullImagesCheck(execer utilsexec.Interface, cfg *kubeadmapi.InitConfiguration, ignorePreflightErrors sets.Set[string]) error {
 	containerRuntime := utilruntime.NewContainerRuntime(cfg.NodeRegistration.CRISocket)