From 4113462fe4bef73cd1f3a9c74f1cf0b2a1b643bd Mon Sep 17 00:00:00 2001
From: xiadanni1 <xiadanni1@huawei.com>
Date: Tue, 18 Aug 2020 03:26:32 +0800
Subject: [PATCH 34/50] kata-runtime: add kata-ipvs command

reason: add kata-ipvs command to update IPVS rules
in VM.

Signed-off-by: xiadanni1 <xiadanni1@huawei.com>
---
 cli/ipvsadm.go                                     | 239 ++++++++
 cli/main.go                                        |   1 +
 .../agent/protocols/grpc/agent.pb.go               | 663 +++++++++++++++------
 virtcontainers/agent.go                            |   3 +
 virtcontainers/api.go                              |  25 +
 virtcontainers/implementation.go                   |   5 +
 virtcontainers/interfaces.go                       |   3 +
 virtcontainers/kata_agent.go                       |  24 +
 virtcontainers/noop_agent.go                       |   4 +
 virtcontainers/pkg/vcmock/mock.go                  |   8 +
 virtcontainers/pkg/vcmock/sandbox.go               |   5 +
 virtcontainers/pkg/vcmock/types.go                 |   2 +
 virtcontainers/sandbox.go                          |   5 +
 13 files changed, 806 insertions(+), 181 deletions(-)
 create mode 100644 cli/ipvsadm.go

diff --git a/cli/ipvsadm.go b/cli/ipvsadm.go
new file mode 100644
index 00000000..51e4bf41
--- /dev/null
+++ b/cli/ipvsadm.go
@@ -0,0 +1,239 @@
+// Copyright (c) Huawei Technologies Co., Ltd. 2020. All rights reserved.
+// SPDX-License-Identifier: Apache-2.0
+// Description: IPVS related common functions
+// Author: xiadanni
+// Create: 2020-08-01
+
+package main
+
+import (
+	"bufio"
+	"bytes"
+	"fmt"
+	"io"
+	"os"
+	"regexp"
+	"strconv"
+	"strings"
+
+	"github.com/kata-containers/agent/protocols/grpc"
+	"github.com/kata-containers/runtime/virtcontainers/types"
+	"github.com/urfave/cli"
+)
+
+const (
+	ruleLimitMax = 20000
+	restoreHead  = "restore"
+)
+
+var kataIPVSCLICommand = cli.Command{
+	Name:  "kata-ipvs",
+	Usage: "manage IPVS service for container",
+	Subcommands: []cli.Command{
+		IPVSadmCommand,
+		CleanupCommand,
+	},
+	Action: func(context *cli.Context) error {
+		return cli.ShowSubcommandHelp(context)
+	},
+}
+
+var IPVSadmCommand = cli.Command{
+	Name:      "ipvsadm",
+	Usage:     "manage virtual server and real server for container",
+	ArgsUsage: `<container-id>`,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "parameters",
+			Usage: "parameters of IPVSadm command",
+		},
+		cli.StringFlag{
+			Name:  "restore",
+			Usage: "restore rules from stdin, - for stdin",
+		},
+	},
+	Action: func(context *cli.Context) error {
+		ctx, err := cliContextToContext(context)
+		if err != nil {
+			return err
+		}
+
+		status, sandboxID, err := getExistingContainerInfo(ctx, context.Args().First())
+		if err != nil {
+			return err
+		}
+
+		if status.State.State != types.StateReady &&
+			status.State.State != types.StateRunning {
+			return fmt.Errorf("container with id %s is not running", status.ID)
+		}
+
+		var IPVSRule string
+		input := context.String("restore")
+		if input != "" {
+			if input != "-" {
+				return fmt.Errorf("invalid kata-IPVS command, please use --restore - for stdin")
+			}
+			ruleFile, ruleCnt, err := getRestoreFile(os.Stdin)
+			if err != nil {
+				return err
+			}
+			// restore format: restore|ruleCnt|ruleFileContext
+			IPVSRule = restoreHead + "|" + strconv.Itoa(ruleCnt) + "|" + ruleFile
+		} else {
+			parameters := context.String("parameters")
+			IPVSRule = "ipvsadm " + parameters
+			IPVSRule, err = checkIPVSRule(IPVSRule)
+			if err != nil {
+				return err
+			}
+
+			// we just use NAT mode
+			if strings.Contains(IPVSRule, "add-server") || strings.Contains(IPVSRule, "edit-server") ||
+				strings.Contains(IPVSRule, " -a ") || strings.Contains(IPVSRule, " -e ") {
+				IPVSRule = IPVSRule + " -m"
+			}
+		}
+
+		IPVSReq := &grpc.UpdateIPVSRequest{
+			IPVSReq: IPVSRule,
+		}
+		resultingIPVS, err := vci.UpdateIPVSRule(ctx, sandboxID, IPVSReq)
+		if err != nil {
+			kataLog.WithField("resulting-IPVSadm", fmt.Sprintf("%+v", resultingIPVS)).
+				WithError(err).Error("exec IPVSadm failed")
+			return err
+		}
+
+		if resultingIPVS.IPVSRes != "" {
+			fmt.Printf(resultingIPVS.IPVSRes)
+		}
+
+		return nil
+	},
+}
+
+var CleanupCommand = cli.Command{
+	Name:      "cleanup",
+	Usage:     "delete conntrack of destination address",
+	ArgsUsage: `<container-id>`,
+	Flags: []cli.Flag{
+		cli.StringFlag{
+			Name:  "parameters",
+			Usage: "parameters of cleanup command",
+		},
+	},
+	Action: func(context *cli.Context) error {
+		ctx, err := cliContextToContext(context)
+		if err != nil {
+			return err
+		}
+
+		status, sandboxID, err := getExistingContainerInfo(ctx, context.Args().First())
+		if err != nil {
+			return err
+		}
+
+		if status.State.State != types.StateReady &&
+			status.State.State != types.StateRunning {
+			return fmt.Errorf("container with id %s is not running", status.ID)
+		}
+
+		parameters := context.String("parameters")
+		IPVSRule := "conntrack -D " + parameters
+
+		_, err = checkIPVSRule(IPVSRule)
+		if err != nil {
+			return err
+		}
+
+		IPVSReq := &grpc.UpdateIPVSRequest{
+			IPVSReq: IPVSRule,
+		}
+		resultingIPVS, err := vci.UpdateIPVSRule(ctx, sandboxID, IPVSReq)
+		if err != nil {
+			kataLog.WithField("resulting-conntrack", fmt.Sprintf("%+v", resultingIPVS)).
+				WithError(err).Error("exec conntrack failed")
+			return err
+		}
+
+		fmt.Printf(resultingIPVS.IPVSRes)
+
+		return nil
+	},
+}
+
+var (
+	match   = regexp.MustCompile
+	ipReg   = `((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)`
+	portReg = `:(6[0-4]\d{3}|65[0-4]\d{2}|655[0-2]\d|6553[0-5]|[1-5]\d{4}|[1-9]\d{0,3})\b`
+
+	addOrEditServiceReg = match(`(--(add|edit)-service|-A|-E)\s+`)
+	serverTopReg        = match(`(--(add|edit|delete)-server|-a|-e|-d)\s+`)
+	schedulerReg        = match(`(--scheduler|-s)(\s+|=)(rr|wrr|lc|wlc|lblc|lblcr|dh|sh|sed|nq)\b`)
+	persistentReg       = match(`(--persistent|-p)(\s+|=)\d{1,7}\b`)
+	persistentZeroReg   = match(`(--persistent|-p)\s+0\b`)
+	serviceReg          = match(`(--(tcp|udp)-service|-t|-u)(\s+|=)` + ipReg + portReg)
+	serverReg           = match(`(--real-server|-r)(\s+|=)` + ipReg + portReg)
+	delServiceReg       = match(`(--delete-service|-D)\s+` + serviceReg.String())
+	conntrackReg        = match(`conntrack\s+-D\s+(--orig-dst|-d)\s+` + ipReg + `\s+(--protonum|-p)\s+(tcp|udp)\s*$`)
+	otherReg            = match(`((--list|-L|-l|--clear|-C|--set).*)|` + conntrackReg.String())
+)
+
+func checkIPVSRule(rule string) (string, error) {
+	switch {
+	// match add-service or edit-service rule format
+	case addOrEditServiceReg.MatchString(rule) && serviceReg.MatchString(rule) &&
+		schedulerReg.MatchString(rule) && persistentReg.MatchString(rule):
+		rule = persistentZeroReg.ReplaceAllString(rule, "")
+		return rule, nil
+	// match delete-service rule format
+	case delServiceReg.MatchString(rule):
+		return rule, nil
+	// match add/edit/delete-server rule format
+	case serverTopReg.MatchString(rule) && serviceReg.MatchString(rule) && serverReg.MatchString(rule):
+		return rule, nil
+	// match cleanup/list/set/clear rule format
+	case otherReg.MatchString(rule):
+		return rule, nil
+	default:
+		return "", fmt.Errorf("invalid input of IPVS rule")
+	}
+}
+
+func getRestoreFile(stdin io.Reader) (string, int, error) {
+	var ruleContent bytes.Buffer
+	firstFlag := true
+	ruleCnt := 0
+	scanner := bufio.NewScanner(stdin)
+	for scanner.Scan() {
+		if err := scanner.Err(); err != nil {
+			return "", 0, err
+		}
+		newLine := scanner.Text()
+
+		_, err := checkIPVSRule(newLine)
+		if err != nil {
+			return "", 0, err
+		}
+
+		ruleCnt++
+
+		if ruleCnt > ruleLimitMax {
+			return "", 0, fmt.Errorf("Rules exceed limit %v", ruleLimitMax)
+		}
+
+		if firstFlag {
+			firstFlag = false
+		} else {
+			ruleContent.WriteString("\n")
+		}
+		ruleContent.WriteString(newLine)
+	}
+
+	if ruleCnt == 0 {
+		return "", 0, fmt.Errorf("Rule file has no effective rule.")
+	}
+
+	return ruleContent.String(), ruleCnt, nil
+}
diff --git a/cli/main.go b/cli/main.go
index 5eb2fb19..95a0786b 100644
--- a/cli/main.go
+++ b/cli/main.go
@@ -146,6 +146,7 @@ var runtimeCommands = []cli.Command{
 	kataNetworkCLICommand,
 	kataOverheadCLICommand,
 	factoryCLICommand,
+	kataIPVSCLICommand,
 }
 
 // runtimeBeforeSubcommands is the function to run before command-line
diff --git a/vendor/github.com/kata-containers/agent/protocols/grpc/agent.pb.go b/vendor/github.com/kata-containers/agent/protocols/grpc/agent.pb.go
index 1b887e55..04d0ee52 100644
--- a/vendor/github.com/kata-containers/agent/protocols/grpc/agent.pb.go
+++ b/vendor/github.com/kata-containers/agent/protocols/grpc/agent.pb.go
@@ -63,6 +63,8 @@
 		CopyFileRequest
 		StartTracingRequest
 		StopTracingRequest
+		UpdateIPVSRequest
+		IPVSResponse
 		CheckRequest
 		HealthCheckResponse
 		VersionCheckResponse
@@ -1842,6 +1844,40 @@ func (m *StopTracingRequest) String() string            { return proto.CompactTe
 func (*StopTracingRequest) ProtoMessage()               {}
 func (*StopTracingRequest) Descriptor() ([]byte, []int) { return fileDescriptorAgent, []int{52} }
 
+type UpdateIPVSRequest struct {
+	// IPVS_req is the IPVS rule message needed to update
+	IPVSReq string `protobuf:"bytes,1,opt,name=IPVS_req,json=IPVSReq,proto3" json:"IPVS_req,omitempty"`
+}
+
+func (m *UpdateIPVSRequest) Reset()                    { *m = UpdateIPVSRequest{} }
+func (m *UpdateIPVSRequest) String() string            { return proto.CompactTextString(m) }
+func (*UpdateIPVSRequest) ProtoMessage()               {}
+func (*UpdateIPVSRequest) Descriptor() ([]byte, []int) { return fileDescriptorAgent, []int{53} }
+
+func (m *UpdateIPVSRequest) GetIPVSReq() string {
+	if m != nil {
+		return m.IPVSReq
+	}
+	return ""
+}
+
+type IPVSResponse struct {
+	// IPVS_res is the response of IPVS updating
+	IPVSRes string `protobuf:"bytes,1,opt,name=IPVS_res,json=IPVSRes,proto3" json:"IPVS_res,omitempty"`
+}
+
+func (m *IPVSResponse) Reset()                    { *m = IPVSResponse{} }
+func (m *IPVSResponse) String() string            { return proto.CompactTextString(m) }
+func (*IPVSResponse) ProtoMessage()               {}
+func (*IPVSResponse) Descriptor() ([]byte, []int) { return fileDescriptorAgent, []int{54} }
+
+func (m *IPVSResponse) GetIPVSRes() string {
+	if m != nil {
+		return m.IPVSRes
+	}
+	return ""
+}
+
 func init() {
 	proto.RegisterType((*CreateContainerRequest)(nil), "grpc.CreateContainerRequest")
 	proto.RegisterType((*StartContainerRequest)(nil), "grpc.StartContainerRequest")
@@ -1896,6 +1932,8 @@ func init() {
 	proto.RegisterType((*CopyFileRequest)(nil), "grpc.CopyFileRequest")
 	proto.RegisterType((*StartTracingRequest)(nil), "grpc.StartTracingRequest")
 	proto.RegisterType((*StopTracingRequest)(nil), "grpc.StopTracingRequest")
+	proto.RegisterType((*UpdateIPVSRequest)(nil), "grpc.UpdateIPVSRequest")
+	proto.RegisterType((*IPVSResponse)(nil), "grpc.IPVSResponse")
 }
 
 // Reference imports to suppress errors if they are not otherwise used.
@@ -1938,6 +1976,7 @@ type AgentServiceClient interface {
 	UpdateRoutes(ctx context.Context, in *UpdateRoutesRequest, opts ...grpc1.CallOption) (*Routes, error)
 	ListInterfaces(ctx context.Context, in *ListInterfacesRequest, opts ...grpc1.CallOption) (*Interfaces, error)
 	ListRoutes(ctx context.Context, in *ListRoutesRequest, opts ...grpc1.CallOption) (*Routes, error)
+	UpdateIPVSRule(ctx context.Context, in *UpdateIPVSRequest, opts ...grpc1.CallOption) (*IPVSResponse, error)
 	// tracing
 	StartTracing(ctx context.Context, in *StartTracingRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error)
 	StopTracing(ctx context.Context, in *StopTracingRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error)
@@ -2140,6 +2179,15 @@ func (c *agentServiceClient) ListRoutes(ctx context.Context, in *ListRoutesReque
 	return out, nil
 }
 
+func (c *agentServiceClient) UpdateIPVSRule(ctx context.Context, in *UpdateIPVSRequest, opts ...grpc1.CallOption) (*IPVSResponse, error) {
+	out := new(IPVSResponse)
+	err := grpc1.Invoke(ctx, "/grpc.AgentService/UpdateIPVSRule", in, out, c.cc, opts...)
+	if err != nil {
+		return nil, err
+	}
+	return out, nil
+}
+
 func (c *agentServiceClient) StartTracing(ctx context.Context, in *StartTracingRequest, opts ...grpc1.CallOption) (*google_protobuf2.Empty, error) {
 	out := new(google_protobuf2.Empty)
 	err := grpc1.Invoke(ctx, "/grpc.AgentService/StartTracing", in, out, c.cc, opts...)
@@ -2262,6 +2310,7 @@ type AgentServiceServer interface {
 	UpdateRoutes(context.Context, *UpdateRoutesRequest) (*Routes, error)
 	ListInterfaces(context.Context, *ListInterfacesRequest) (*Interfaces, error)
 	ListRoutes(context.Context, *ListRoutesRequest) (*Routes, error)
+	UpdateIPVSRule(context.Context, *UpdateIPVSRequest) (*IPVSResponse, error)
 	// tracing
 	StartTracing(context.Context, *StartTracingRequest) (*google_protobuf2.Empty, error)
 	StopTracing(context.Context, *StopTracingRequest) (*google_protobuf2.Empty, error)
@@ -2640,6 +2689,24 @@ func _AgentService_ListRoutes_Handler(srv interface{}, ctx context.Context, dec
 	return interceptor(ctx, in, info, handler)
 }
 
+func _AgentService_UpdateIPVSRule_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc1.UnaryServerInterceptor) (interface{}, error) {
+	in := new(UpdateIPVSRequest)
+	if err := dec(in); err != nil {
+		return nil, err
+	}
+	if interceptor == nil {
+		return srv.(AgentServiceServer).UpdateIPVSRule(ctx, in)
+	}
+	info := &grpc1.UnaryServerInfo{
+		Server:     srv,
+		FullMethod: "/grpc.AgentService/UpdateIPVSRule",
+	}
+	handler := func(ctx context.Context, req interface{}) (interface{}, error) {
+		return srv.(AgentServiceServer).UpdateIPVSRule(ctx, req.(*UpdateIPVSRequest))
+	}
+	return interceptor(ctx, in, info, handler)
+}
+
 func _AgentService_StartTracing_Handler(srv interface{}, ctx context.Context, dec func(interface{}) error, interceptor grpc1.UnaryServerInterceptor) (interface{}, error) {
 	in := new(StartTracingRequest)
 	if err := dec(in); err != nil {
@@ -2904,6 +2971,10 @@ var _AgentService_serviceDesc = grpc1.ServiceDesc{
 			MethodName: "ListRoutes",
 			Handler:    _AgentService_ListRoutes_Handler,
 		},
+		{
+			MethodName: "UpdateIPVSRule",
+			Handler:    _AgentService_UpdateIPVSRule_Handler,
+		},
 		{
 			MethodName: "StartTracing",
 			Handler:    _AgentService_StartTracing_Handler,
@@ -5088,6 +5159,54 @@ func (m *StopTracingRequest) MarshalTo(dAtA []byte) (int, error) {
 	return i, nil
 }
 
+func (m *UpdateIPVSRequest) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *UpdateIPVSRequest) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.IPVSReq) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(len(m.IPVSReq)))
+		i += copy(dAtA[i:], m.IPVSReq)
+	}
+	return i, nil
+}
+
+func (m *IPVSResponse) Marshal() (dAtA []byte, err error) {
+	size := m.Size()
+	dAtA = make([]byte, size)
+	n, err := m.MarshalTo(dAtA)
+	if err != nil {
+		return nil, err
+	}
+	return dAtA[:n], nil
+}
+
+func (m *IPVSResponse) MarshalTo(dAtA []byte) (int, error) {
+	var i int
+	_ = i
+	var l int
+	_ = l
+	if len(m.IPVSRes) > 0 {
+		dAtA[i] = 0xa
+		i++
+		i = encodeVarintAgent(dAtA, i, uint64(len(m.IPVSRes)))
+		i += copy(dAtA[i:], m.IPVSRes)
+	}
+	return i, nil
+}
+
 func encodeVarintAgent(dAtA []byte, offset int, v uint64) int {
 	for v >= 1<<7 {
 		dAtA[offset] = uint8(v&0x7f | 0x80)
@@ -6019,6 +6138,26 @@ func (m *StopTracingRequest) Size() (n int) {
 	return n
 }
 
+func (m *UpdateIPVSRequest) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.IPVSReq)
+	if l > 0 {
+		n += 1 + l + sovAgent(uint64(l))
+	}
+	return n
+}
+
+func (m *IPVSResponse) Size() (n int) {
+	var l int
+	_ = l
+	l = len(m.IPVSRes)
+	if l > 0 {
+		n += 1 + l + sovAgent(uint64(l))
+	}
+	return n
+}
+
 func sovAgent(x uint64) (n int) {
 	for {
 		n++
@@ -12785,6 +12924,164 @@ func (m *StopTracingRequest) Unmarshal(dAtA []byte) error {
 	}
 	return nil
 }
+func (m *UpdateIPVSRequest) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowAgent
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: UpdateIPVSRequest: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: UpdateIPVSRequest: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field IPVSReq", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAgent
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.IPVSReq = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipAgent(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthAgent
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
+func (m *IPVSResponse) Unmarshal(dAtA []byte) error {
+	l := len(dAtA)
+	iNdEx := 0
+	for iNdEx < l {
+		preIndex := iNdEx
+		var wire uint64
+		for shift := uint(0); ; shift += 7 {
+			if shift >= 64 {
+				return ErrIntOverflowAgent
+			}
+			if iNdEx >= l {
+				return io.ErrUnexpectedEOF
+			}
+			b := dAtA[iNdEx]
+			iNdEx++
+			wire |= (uint64(b) & 0x7F) << shift
+			if b < 0x80 {
+				break
+			}
+		}
+		fieldNum := int32(wire >> 3)
+		wireType := int(wire & 0x7)
+		if wireType == 4 {
+			return fmt.Errorf("proto: IPVSResponse: wiretype end group for non-group")
+		}
+		if fieldNum <= 0 {
+			return fmt.Errorf("proto: IPVSResponse: illegal tag %d (wire type %d)", fieldNum, wire)
+		}
+		switch fieldNum {
+		case 1:
+			if wireType != 2 {
+				return fmt.Errorf("proto: wrong wireType = %d for field IPVSRes", wireType)
+			}
+			var stringLen uint64
+			for shift := uint(0); ; shift += 7 {
+				if shift >= 64 {
+					return ErrIntOverflowAgent
+				}
+				if iNdEx >= l {
+					return io.ErrUnexpectedEOF
+				}
+				b := dAtA[iNdEx]
+				iNdEx++
+				stringLen |= (uint64(b) & 0x7F) << shift
+				if b < 0x80 {
+					break
+				}
+			}
+			intStringLen := int(stringLen)
+			if intStringLen < 0 {
+				return ErrInvalidLengthAgent
+			}
+			postIndex := iNdEx + intStringLen
+			if postIndex > l {
+				return io.ErrUnexpectedEOF
+			}
+			m.IPVSRes = string(dAtA[iNdEx:postIndex])
+			iNdEx = postIndex
+		default:
+			iNdEx = preIndex
+			skippy, err := skipAgent(dAtA[iNdEx:])
+			if err != nil {
+				return err
+			}
+			if skippy < 0 {
+				return ErrInvalidLengthAgent
+			}
+			if (iNdEx + skippy) > l {
+				return io.ErrUnexpectedEOF
+			}
+			iNdEx += skippy
+		}
+	}
+
+	if iNdEx > l {
+		return io.ErrUnexpectedEOF
+	}
+	return nil
+}
 func skipAgent(dAtA []byte) (n int, err error) {
 	l := len(dAtA)
 	iNdEx := 0
@@ -12893,185 +13190,189 @@ var (
 func init() { proto.RegisterFile("agent.proto", fileDescriptorAgent) }
 
 var fileDescriptorAgent = []byte{
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+	0x0b, 0xff, 0x64, 0x90, 0x69, 0xaa, 0xac, 0xfe, 0x55, 0x33, 0xda, 0x1e, 0xeb, 0x7f, 0x3c, 0x63,
+	0xfb, 0x8f, 0x67, 0xfc, 0x20, 0x4a, 0xc4, 0x1c, 0x3d, 0x80, 0x5e, 0xf9, 0xef, 0x05, 0xba, 0x6e,
+	0x73, 0x90, 0x15, 0xff, 0x34, 0x2e, 0x64, 0xf3, 0x10, 0xfa, 0x0b, 0x3f, 0x32, 0xac, 0x3e, 0xab,
+	0xff, 0x6f, 0x5c, 0xc8, 0xe8, 0x2e, 0xb4, 0x0b, 0x7f, 0x2e, 0xd0, 0x50, 0x33, 0x59, 0xfe, 0x99,
+	0x71, 0x21, 0x83, 0x7d, 0xe8, 0x96, 0x7e, 0x26, 0xa0, 0x91, 0xb1, 0x67, 0xc5, 0x1f, 0x86, 0x0b,
+	0x99, 0xec, 0x41, 0xbb, 0xd0, 0xd3, 0xb7, 0x5a, 0x2c, 0xff, 0x38, 0x18, 0x5d, 0x5b, 0x31, 0x63,
+	0xb6, 0xf3, 0x00, 0xba, 0xa5, 0x0e, 0xbc, 0x55, 0x64, 0x55, 0xf7, 0x7f, 0x74, 0x7d, 0xe5, 0x9c,
+	0xe1, 0xf4, 0x10, 0xfa, 0x0b, 0xfd, 0x78, 0xeb, 0xdc, 0xd5, 0x6d, 0xfa, 0x0b, 0xcd, 0xfa, 0x5c,
+	0x6d, 0x76, 0xa1, 0xdc, 0x2a, 0x6c, 0xf6, 0x72, 0xf7, 0x7d, 0x74, 0x63, 0xf5, 0xa4, 0xd1, 0xea,
+	0x01, 0xf4, 0xca, 0x8d, 0x77, 0xcb, 0x6c, 0x65, 0x3b, 0xfe, 0xf2, 0x93, 0x53, 0xea, 0xc1, 0xe7,
+	0x27, 0x67, 0x55, 0x6b, 0xfe, 0x42, 0x46, 0xf7, 0x00, 0x4c, 0x71, 0x15, 0x92, 0x38, 0xdb, 0xb2,
+	0xa5, 0xa2, 0x2e, 0xdb, 0xb2, 0x15, 0x85, 0xd8, 0x5d, 0x00, 0x5d, 0x13, 0x85, 0x34, 0x15, 0xe8,
+	0xaa, 0x55, 0x63, 0xa1, 0x10, 0x1b, 0x0d, 0x97, 0x27, 0x96, 0x18, 0x60, 0xc6, 0x5e, 0x84, 0xc1,
+	0x67, 0x00, 0x79, 0xad, 0x65, 0x19, 0x2c, 0x55, 0x5f, 0x97, 0xf8, 0xa0, 0x53, 0xac, 0xac, 0x90,
+	0xb1, 0x75, 0x45, 0xb5, 0x75, 0x09, 0x8b, 0xfe, 0x42, 0xe6, 0x5c, 0x3e, 0x6c, 0x8b, 0x09, 0xf5,
+	0x68, 0x29, 0x7b, 0x46, 0x1f, 0x42, 0xa7, 0x98, 0x32, 0x5b, 0x2d, 0x56, 0xa4, 0xd1, 0xa3, 0x52,
+	0xda, 0x8c, 0xee, 0x42, 0xaf, 0x9c, 0x10, 0xa3, 0xc2, 0xbd, 0x58, 0x4a, 0x93, 0x47, 0xa6, 0x19,
+	0x54, 0x20, 0x7f, 0x1f, 0x20, 0x4f, 0x9c, 0xad, 0xfb, 0x96, 0x52, 0xe9, 0x05, 0xa9, 0x9f, 0x41,
+	0xaf, 0x10, 0xb7, 0x65, 0x4d, 0x78, 0xb5, 0x64, 0x70, 0x1e, 0xcd, 0x47, 0x26, 0xc3, 0x2a, 0x85,
+	0xed, 0x7b, 0xd0, 0x29, 0xbe, 0x11, 0xd6, 0xda, 0x15, 0xef, 0xc6, 0x65, 0x41, 0xaf, 0xf0, 0x9e,
+	0xd8, 0xb3, 0xbb, 0xfc, 0xc4, 0x5c, 0x16, 0xf4, 0x4a, 0xf5, 0xa8, 0x8d, 0x35, 0xab, 0x8a, 0xd4,
+	0xcb, 0x9e, 0x82, 0x72, 0xf1, 0x66, 0xbd, 0xbf, 0xb2, 0xa4, 0xbb, 0xec, 0x0c, 0x16, 0xeb, 0x14,
+	0xeb, 0x8f, 0x15, 0xb5, 0xcb, 0xf7, 0xc4, 0x84, 0x62, 0x2d, 0x52, 0x88, 0x09, 0x2b, 0x4a, 0x94,
+	0x0b, 0x19, 0x1d, 0x40, 0xff, 0xa1, 0x4d, 0x33, 0x4d, 0x0a, 0x6c, 0xd4, 0x59, 0x91, 0xf2, 0x8f,
+	0x46, 0xab, 0xa6, 0xcc, 0x2e, 0x7f, 0x0e, 0x83, 0xa5, 0xf4, 0x17, 0xdd, 0xcc, 0x5a, 0x9e, 0x2b,
+	0xf3, 0xe2, 0x0b, 0xd5, 0x3a, 0x84, 0x8d, 0xc5, 0xec, 0x17, 0xbd, 0x62, 0x36, 0x7d, 0x75, 0x56,
+	0x7c, 0x21, 0xab, 0x8f, 0xa1, 0x69, 0xb3, 0x2d, 0x64, 0x5a, 0xcb, 0x0b, 0xd9, 0xd7, 0x45, 0x4b,
+	0xf7, 0x3a, 0xdf, 0x7e, 0x77, 0xb3, 0xf2, 0xd7, 0xef, 0x6e, 0x56, 0xfe, 0xf1, 0xdd, 0xcd, 0xca,
+	0x71, 0x43, 0xcd, 0xbe, 0xff, 0xaf, 0x00, 0x00, 0x00, 0xff, 0xff, 0x45, 0xa8, 0x91, 0xab, 0x62,
+	0x22, 0x00, 0x00,
 }
diff --git a/virtcontainers/agent.go b/virtcontainers/agent.go
index c22ed39c..3f22d9f0 100644
--- a/virtcontainers/agent.go
+++ b/virtcontainers/agent.go
@@ -264,4 +264,7 @@ type agent interface {
 
 	// get proxy process pid
 	getProxyPid() int
+
+	// updateIPVSRule updates IPVS rules in VM
+	updateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error)
 }
diff --git a/virtcontainers/api.go b/virtcontainers/api.go
index a4bf41bb..7036df8c 100644
--- a/virtcontainers/api.go
+++ b/virtcontainers/api.go
@@ -13,6 +13,7 @@ import (
 	"strings"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	deviceApi "github.com/kata-containers/runtime/virtcontainers/device/api"
 	deviceConfig "github.com/kata-containers/runtime/virtcontainers/device/config"
 	"github.com/kata-containers/runtime/virtcontainers/persist"
@@ -1017,6 +1018,30 @@ func ListRoutes(ctx context.Context, sandboxID string) ([]*vcTypes.Route, error)
 	return routes, nil
 }
 
+// UpdateIPVSRule adds IPVS rule
+func UpdateIPVSRule(ctx context.Context, sandboxID string, IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	span, ctx := trace(ctx, "UpdateIPVSRule")
+	defer span.Finish()
+
+	if sandboxID == "" {
+		return nil, vcTypes.ErrNeedSandboxID
+	}
+
+	unlock, err := rwLockSandbox(sandboxID)
+	if err != nil {
+		return nil, err
+	}
+	defer unlock()
+
+	s, err := fetchSandbox(ctx, sandboxID)
+	if err != nil {
+		return nil, err
+	}
+	defer s.releaseStatelessSandbox()
+
+	return s.UpdateIPVSRule(IPVSRule)
+}
+
 // CleanupContaienr is used by shimv2 to stop and delete a container exclusively, once there is no container
 // in the sandbox left, do stop the sandbox and delete it. Those serial operations will be done exclusively by
 // locking the sandbox.
diff --git a/virtcontainers/implementation.go b/virtcontainers/implementation.go
index 92cc4c12..0265d1ed 100644
--- a/virtcontainers/implementation.go
+++ b/virtcontainers/implementation.go
@@ -13,6 +13,7 @@ import (
 	"context"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	"github.com/kata-containers/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
 	vcTypes "github.com/kata-containers/runtime/virtcontainers/pkg/types"
@@ -178,3 +179,7 @@ func (impl *VCImpl) ListRoutes(ctx context.Context, sandboxID string) ([]*vcType
 func (impl *VCImpl) CleanupContainer(ctx context.Context, sandboxID, containerID string, force bool) error {
 	return CleanupContainer(ctx, sandboxID, containerID, force)
 }
+
+func (impl *VCImpl) UpdateIPVSRule(ctx context.Context, sandboxID string, IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	return UpdateIPVSRule(ctx, sandboxID, IPVSRule)
+}
diff --git a/virtcontainers/interfaces.go b/virtcontainers/interfaces.go
index 6bb9ea22..d8f0be69 100644
--- a/virtcontainers/interfaces.go
+++ b/virtcontainers/interfaces.go
@@ -10,6 +10,7 @@ import (
 	"io"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	"github.com/kata-containers/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
 	vcTypes "github.com/kata-containers/runtime/virtcontainers/pkg/types"
@@ -53,6 +54,7 @@ type VC interface {
 	ListInterfaces(ctx context.Context, sandboxID string) ([]*vcTypes.Interface, error)
 	UpdateRoutes(ctx context.Context, sandboxID string, routes []*vcTypes.Route, op vcTypes.NetworkOp) ([]*vcTypes.Route, error)
 	ListRoutes(ctx context.Context, sandboxID string) ([]*vcTypes.Route, error)
+	UpdateIPVSRule(ctx context.Context, sandboxID string, IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error)
 
 	CleanupContainer(ctx context.Context, sandboxID, containerID string, force bool) error
 }
@@ -99,6 +101,7 @@ type VCSandbox interface {
 	UpdateRoutes(routes []*vcTypes.Route, op vcTypes.NetworkOp) ([]*vcTypes.Route, error)
 	ListRoutes() ([]*vcTypes.Route, error)
 	IsCompatOldCNI() bool
+	UpdateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error)
 }
 
 // VCContainer is the Container interface
diff --git a/virtcontainers/kata_agent.go b/virtcontainers/kata_agent.go
index 16662949..29287685 100644
--- a/virtcontainers/kata_agent.go
+++ b/virtcontainers/kata_agent.go
@@ -128,6 +128,7 @@ const (
 	grpcSetGuestDateTimeRequest  = "grpc.SetGuestDateTimeRequest"
 	grpcStartTracingRequest      = "grpc.StartTracingRequest"
 	grpcStopTracingRequest       = "grpc.StopTracingRequest"
+	grpcUpdateIPVSRequest        = "grpc.UpdateIPVSRequest"
 )
 
 // The function is declared this way for mocking in unit tests
@@ -2067,6 +2068,10 @@ func (k *kataAgent) installReqFunc(c *kataclient.AgentClient) {
 	k.reqHandlers[grpcStopTracingRequest] = func(ctx context.Context, req interface{}, opts ...golangGrpc.CallOption) (interface{}, error) {
 		return k.client.StopTracing(ctx, req.(*grpc.StopTracingRequest), opts...)
 	}
+	k.reqHandlers[grpcUpdateIPVSRequest] = func(ctx context.Context, req interface{}, opts ...golangGrpc.CallOption) (interface{}, error) {
+		return k.client.UpdateIPVSRule(ctx, req.(*grpc.UpdateIPVSRequest), opts...)
+	}
+
 }
 
 func (k *kataAgent) getReqContext(reqName string) (ctx context.Context, cancel context.CancelFunc) {
@@ -2402,3 +2407,22 @@ func (k *kataAgent) load(s persistapi.AgentState) {
 func (k *kataAgent) getProxyPid() int {
 	return k.state.ProxyPid
 }
+
+func (k *kataAgent) updateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	if IPVSRule == nil {
+		return nil, nil
+	}
+	resultingIPVS, err := k.sendReq(IPVSRule)
+	if err != nil {
+		k.Logger().WithFields(logrus.Fields{
+			"IPVS-requested": fmt.Sprintf("%+v", IPVSRule),
+			"resulting-IPVS": fmt.Sprintf("%+v", resultingIPVS),
+		}).WithError(err).Error("update IPVS rule request failed")
+	}
+	resultIPVS, ok := resultingIPVS.(*grpc.IPVSResponse)
+	if ok && resultIPVS != nil {
+		return resultIPVS, err
+	}
+
+	return nil, err
+}
diff --git a/virtcontainers/noop_agent.go b/virtcontainers/noop_agent.go
index b19705c3..d174623b 100644
--- a/virtcontainers/noop_agent.go
+++ b/virtcontainers/noop_agent.go
@@ -240,3 +240,7 @@ func (n *noopAgent) load(s persistapi.AgentState) {}
 func (n *noopAgent) getProxyPid() int {
 	return -1
 }
+
+func (n *noopAgent) updateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	return nil, nil
+}
diff --git a/virtcontainers/pkg/vcmock/mock.go b/virtcontainers/pkg/vcmock/mock.go
index 9c50e0e4..aa9bae9a 100644
--- a/virtcontainers/pkg/vcmock/mock.go
+++ b/virtcontainers/pkg/vcmock/mock.go
@@ -20,6 +20,7 @@ import (
 	"fmt"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	vc "github.com/kata-containers/runtime/virtcontainers"
 	"github.com/kata-containers/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
@@ -296,3 +297,10 @@ func (m *VCMock) CleanupContainer(ctx context.Context, sandboxID, containerID st
 	}
 	return fmt.Errorf("%s: %s (%+v): sandboxID: %v", mockErrorPrefix, getSelf(), m, sandboxID)
 }
+
+func (m *VCMock) UpdateIPVSRule(ctx context.Context, sandboxID string, ipvs *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	if m.UpdateIPVSRuleFunc != nil {
+		return m.UpdateIPVSRuleFunc(ctx, sandboxID, ipvs)
+	}
+	return nil, fmt.Errorf("%s: %s (%+v): sandboxID: %v", mockErrorPrefix, getSelf(), m, sandboxID)
+}
diff --git a/virtcontainers/pkg/vcmock/sandbox.go b/virtcontainers/pkg/vcmock/sandbox.go
index 7329e1a7..063c9eca 100644
--- a/virtcontainers/pkg/vcmock/sandbox.go
+++ b/virtcontainers/pkg/vcmock/sandbox.go
@@ -9,6 +9,7 @@ import (
 	"io"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	vc "github.com/kata-containers/runtime/virtcontainers"
 	"github.com/kata-containers/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
@@ -217,3 +218,7 @@ func (s *Sandbox) ListRoutes() ([]*vcTypes.Route, error) {
 func (s *Sandbox) IsCompatOldCNI() bool {
 	return false
 }
+
+func (s *Sandbox) UpdateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	return nil, nil
+}
diff --git a/virtcontainers/pkg/vcmock/types.go b/virtcontainers/pkg/vcmock/types.go
index 8cf0e0b7..43247ef9 100644
--- a/virtcontainers/pkg/vcmock/types.go
+++ b/virtcontainers/pkg/vcmock/types.go
@@ -9,6 +9,7 @@ import (
 	"context"
 	"syscall"
 
+	"github.com/kata-containers/agent/protocols/grpc"
 	vc "github.com/kata-containers/runtime/virtcontainers"
 	"github.com/kata-containers/runtime/virtcontainers/device/api"
 	"github.com/kata-containers/runtime/virtcontainers/device/config"
@@ -75,4 +76,5 @@ type VCMock struct {
 	UpdateRoutesFunc     func(ctx context.Context, sandboxID string, routes []*vcTypes.Route) ([]*vcTypes.Route, error)
 	ListRoutesFunc       func(ctx context.Context, sandboxID string) ([]*vcTypes.Route, error)
 	CleanupContainerFunc func(ctx context.Context, sandboxID, containerID string, force bool) error
+	UpdateIPVSRuleFunc   func(ctx context.Context, sandboxID string, ipvs *grpc.UpdateIpvsRequest) (*grpc.IpvsResponse, error)
 }
diff --git a/virtcontainers/sandbox.go b/virtcontainers/sandbox.go
index f226af4e..0d599267 100644
--- a/virtcontainers/sandbox.go
+++ b/virtcontainers/sandbox.go
@@ -1065,6 +1065,11 @@ func (s *Sandbox) ListRoutes() ([]*vcTypes.Route, error) {
 	return s.agent.listRoutes()
 }
 
+// UpdateIPVSRule manages IPVS rule in the sandbox
+func (s *Sandbox) UpdateIPVSRule(IPVSRule *grpc.UpdateIPVSRequest) (*grpc.IPVSResponse, error) {
+	return s.agent.updateIPVSRule(IPVSRule)
+}
+
 // startVM starts the VM.
 func (s *Sandbox) startVM() (err error) {
 	span, ctx := s.trace("startVM")
-- 
2.14.3 (Apple Git-98)