Changes according to the approved KEP. SCTP is supported for HostPort and LoadBalancer. Alpha feature flag SCTPSupport controls the support of SCTP. Kube-proxy config parameter is removed.

pkg/kubelet/dockershim/network/hostport/hostport_manager.go

@@ -264,6 +264,12 @@ func (hm *hostportManager) openHostports(podPortMapping *PodPortMapping) (map[ho
 		if pm.HostPort <= 0 {
 			continue
 		}
+		
+		// We do not open host ports for SCTP ports, as we agreed in the Support of SCTP KEP
+		if pm.Protocol == v1.ProtocolSCTP {
+			continue
+		}
+		
 		hp := portMappingToHostport(pm)
 		socket, err := hm.portOpener(&hp)
 		if err != nil {

pkg/kubelet/dockershim/network/hostport/hostport_manager_test.go

@@ -152,6 +152,11 @@ func TestOpenCloseHostports(t *testing.T) {
 				{HostPort: 7070, Protocol: v1.Protocol("TCP")},
 			},
 		},
+		{
+			portMappings: []*PortMapping{
+				{HostPort: 7777, Protocol: v1.Protocol("SCTP")},
+			},
+		},
 	}
 
 	for _, tc := range closePortCases {
@@ -197,6 +202,11 @@ func TestHostportManager(t *testing.T) {
 						ContainerPort: 81,
 						Protocol:      v1.ProtocolUDP,
 					},
+					{
+                        HostPort:      8083,
+                        ContainerPort: 83,
+                        Protocol:      v1.ProtocolSCTP,
+                    },
 				},
 			},
 			expectError: false,
@@ -218,6 +228,11 @@ func TestHostportManager(t *testing.T) {
 						ContainerPort: 81,
 						Protocol:      v1.ProtocolUDP,
 					},
+					{
+						HostPort:      8083,
+						ContainerPort: 83,
+						Protocol:      v1.ProtocolSCTP,
+					},
 				},
 			},
 			expectError: true,

pkg/kubelet/dockershim/network/hostport/hostport_syncer.go

@@ -29,6 +29,7 @@ import (
 
 	iptablesproxy "k8s.io/kubernetes/pkg/proxy/iptables"
 	utiliptables "k8s.io/kubernetes/pkg/util/iptables"
+	"k8s.io/api/core/v1"
 )
 
 // HostportSyncer takes a list of PodPortMappings and implements hostport all at once
@@ -74,6 +75,12 @@ func (h *hostportSyncer) openHostports(podHostportMapping *PodPortMapping) error
 			// Assume hostport is not specified in this portmapping. So skip
 			continue
 		}
+		
+		// We do not open host ports for SCTP ports, as we agreed in the Support of SCTP KEP
+		if port.Protocol == v1.ProtocolSCTP {
+			continue
+		}
+		
 		hp := hostport{
 			port:     port.HostPort,
 			protocol: strings.ToLower(string(port.Protocol)),