Remove deprecated flag --non-masquerade-cidr in kubelet

Signed-off-by: Ciprian Hacman <ciprian@hakman.dev>

cluster/gce/util.sh

@@ -781,9 +781,6 @@ function construct-linux-kubelet-flags {
       flags+=" --resolv-conf=/run/systemd/resolve/resolv.conf"
     fi
   fi
-  if [[ -n "${NON_MASQUERADE_CIDR:-}" ]]; then
-    flags+=" --non-masquerade-cidr=${NON_MASQUERADE_CIDR}"
-  fi
   flags+=" --volume-plugin-dir=${VOLUME_PLUGIN_DIR}"
   local node_labels
   node_labels="$(build-linux-node-labels "${node_type}")"

cmd/kubelet/app/options/options.go

@@ -143,8 +143,6 @@ type KubeletFlags struct {
 	// schedulable. Won't have any effect if register-node is false.
 	// DEPRECATED: use registerWithTaints instead
 	RegisterSchedulable bool
-	// nonMasqueradeCIDR configures masquerading: traffic to IPs outside this range will use IP masquerade.
-	NonMasqueradeCIDR string
 	// This flag, if set, instructs the kubelet to keep volumes from terminated pods mounted to the node.
 	// This can be useful for debugging volume related issues.
 	KeepTerminatedPodVolumes bool
@@ -163,7 +161,6 @@ func NewKubeletFlags() *KubeletFlags {
 		MaxContainerCount:       -1,
 		MaxPerPodContainerCount: 1,
 		MinimumGCAge:            metav1.Duration{Duration: 0},
-		NonMasqueradeCIDR:       "10.0.0.0/8",
 		RegisterSchedulable:     true,
 		NodeLabels:              make(map[string]string),
 	}
@@ -337,8 +334,6 @@ func (f *KubeletFlags) AddFlags(mainfs *pflag.FlagSet) {
 	fs.MarkDeprecated("master-service-namespace", "This flag will be removed in a future version.")
 	fs.BoolVar(&f.RegisterSchedulable, "register-schedulable", f.RegisterSchedulable, "Register the node as schedulable. Won't have any effect if register-node is false.")
 	fs.MarkDeprecated("register-schedulable", "will be removed in a future version")
-	fs.StringVar(&f.NonMasqueradeCIDR, "non-masquerade-cidr", f.NonMasqueradeCIDR, "Traffic to IPs outside this range will use IP masquerade. Set to '0.0.0.0/0' to never masquerade.")
-	fs.MarkDeprecated("non-masquerade-cidr", "will be removed in a future version")
 	fs.BoolVar(&f.KeepTerminatedPodVolumes, "keep-terminated-pod-volumes", f.KeepTerminatedPodVolumes, "Keep terminated pod volumes mounted to the node after the pod terminates.  Can be useful for debugging volume related issues.")
 	fs.MarkDeprecated("keep-terminated-pod-volumes", "will be removed in a future version")
 	fs.StringVar(&f.ExperimentalMounterPath, "experimental-mounter-path", f.ExperimentalMounterPath, "[Experimental] Path of mounter binary. Leave empty to use the default mount.")

cmd/kubelet/app/server.go

@@ -773,8 +773,7 @@ func run(ctx context.Context, s *options.KubeletServer, kubeDeps *kubelet.Depend
 		s.ContainerRuntime,
 		s.RuntimeCgroups,
 		s.RemoteRuntimeEndpoint,
-		s.RemoteImageEndpoint,
-		s.NonMasqueradeCIDR)
+		s.RemoteImageEndpoint)
 	if err != nil {
 		return err
 	}

pkg/kubelet/kubelet.go

@@ -289,8 +289,7 @@ func PreInitRuntimeService(kubeCfg *kubeletconfiginternal.KubeletConfiguration,
 	containerRuntime string,
 	runtimeCgroups string,
 	remoteRuntimeEndpoint string,
-	remoteImageEndpoint string,
-	nonMasqueradeCIDR string) error {
+	remoteImageEndpoint string) error {
 	if remoteRuntimeEndpoint != "" {
 		// remoteImageEndpoint is same as remoteRuntimeEndpoint if not explicitly specified
 		if remoteImageEndpoint == "" {

pkg/kubelet/kubelet_test.go

@@ -2356,7 +2356,7 @@ func TestSyncTerminatingPodKillPod(t *testing.T) {
 }
 
 func TestPreInitRuntimeService(t *testing.T) {
-	err := PreInitRuntimeService(nil, nil, nil, "", "", "", "", "")
+	err := PreInitRuntimeService(nil, nil, nil, "", "", "", "")
 	if err == nil {
 		t.Fatal("PreInitRuntimeService should fail when not configured with a container runtime")
 	}