kubernetes/pkg/util/ipvs/ipvs_linux_test.go
Son Dinh 4f75949bcb Ipvs: Add a new FlagSourceHash to "mh" distribution method.
With the flag, ipvs uses both source IP and source port (instead of
only source IP) to distribute new connections evently to endpoints
that avoids sending all connections from the same client (i.e. same
source IP) to one single endpoint.

User can explicitly set sessionAffinity in service spec to keep all
connections from a source IP to end up on the same endpoint if needed.

Change-Id: I42f950c0840ac06a4ee68a7bbdeab0fc5505c71f
2023-02-11 20:51:02 +11:00

442 lines
9.9 KiB
Go

//go:build linux
// +build linux
/*
Copyright 2017 The Kubernetes Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package ipvs
import (
"fmt"
"reflect"
"testing"
netutils "k8s.io/utils/net"
libipvs "github.com/moby/ipvs"
"golang.org/x/sys/unix"
)
func Test_toVirtualServer(t *testing.T) {
Tests := []struct {
ipvsService libipvs.Service
virtualServer VirtualServer
expectError bool
reason string
}{
{
libipvs.Service{
Flags: 0x0,
},
VirtualServer{},
true,
fmt.Sprintf("IPVS Service Flags should include %x, got 0x0", FlagHashed),
},
{
libipvs.Service{
Flags: 0x1,
},
VirtualServer{},
true,
fmt.Sprintf("IPVS Service Flags should include %x, got 0x1", FlagHashed),
},
{
libipvs.Service{
Protocol: unix.IPPROTO_TCP,
Port: 80,
FWMark: 0,
SchedName: "",
Flags: uint32(FlagPersistent + FlagHashed),
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: nil,
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("0.0.0.0"),
Protocol: "TCP",
Port: 80,
Scheduler: "",
Flags: ServiceFlags(FlagPersistent),
Timeout: 0,
},
false,
"",
},
{
libipvs.Service{
Protocol: unix.IPPROTO_UDP,
Port: 33434,
FWMark: 0,
SchedName: "wlc",
Flags: uint32(0 + FlagHashed),
Timeout: 100,
Netmask: 128,
AddressFamily: unix.AF_INET6,
Address: netutils.ParseIPSloppy("2012::beef"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("2012::beef"),
Protocol: "UDP",
Port: 33434,
Scheduler: "wlc",
Flags: ServiceFlags(0),
Timeout: 100,
},
false,
"",
},
{
libipvs.Service{
Protocol: 0,
Port: 0,
FWMark: 0,
SchedName: "lc",
Flags: uint32(0 + FlagHashed),
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: netutils.ParseIPSloppy("1.2.3.4"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("1.2.3.4"),
Protocol: "",
Port: 0,
Scheduler: "lc",
Flags: ServiceFlags(0),
Timeout: 0,
},
false,
"",
},
{
libipvs.Service{
Protocol: 0,
Port: 0,
FWMark: 0,
SchedName: "wrr",
Flags: uint32(FlagPersistent + FlagHashed),
Timeout: 0,
Netmask: 128,
AddressFamily: unix.AF_INET6,
Address: nil,
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("::0"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: ServiceFlags(FlagPersistent),
Timeout: 0,
},
false,
"",
},
{
libipvs.Service{
Protocol: 0,
Port: 0,
FWMark: 0,
SchedName: "mh",
Flags: uint32(FlagPersistent + FlagHashed + FlagSourceHash),
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: netutils.ParseIPSloppy("1.2.3.4"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("1.2.3.4"),
Protocol: "",
Port: 0,
Scheduler: "mh",
Flags: ServiceFlags(FlagPersistent + FlagSourceHash),
Timeout: 0,
},
false,
"",
},
{
libipvs.Service{
Protocol: unix.IPPROTO_SCTP,
Port: 80,
FWMark: 0,
SchedName: "",
Flags: uint32(FlagPersistent + FlagHashed),
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: nil,
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("0.0.0.0"),
Protocol: "SCTP",
Port: 80,
Scheduler: "",
Flags: ServiceFlags(FlagPersistent),
Timeout: 0,
},
false,
"",
},
}
for i := range Tests {
got, err := toVirtualServer(&Tests[i].ipvsService)
if Tests[i].expectError && err == nil {
t.Errorf("case: %d, expected error: %s, got nil", i, Tests[i].reason)
}
if !Tests[i].expectError && err != nil {
t.Errorf("case: %d, unexpected error: %v", i, err)
}
if got != nil {
if !reflect.DeepEqual(*got, Tests[i].virtualServer) {
t.Errorf("case: %d, got %#v, want %#v", i, *got, Tests[i].virtualServer)
}
}
}
}
func Test_toIPVSService(t *testing.T) {
Tests := []struct {
ipvsService libipvs.Service
virtualServer VirtualServer
}{
{
libipvs.Service{
Protocol: unix.IPPROTO_TCP,
Port: 80,
FWMark: 0,
SchedName: "",
Flags: 0,
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: netutils.ParseIPSloppy("0.0.0.0"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("0.0.0.0"),
Protocol: "TCP",
Port: 80,
Scheduler: "",
Flags: 0,
Timeout: 0,
},
},
{
libipvs.Service{
Protocol: unix.IPPROTO_UDP,
Port: 33434,
FWMark: 0,
SchedName: "wlc",
Flags: 1234,
Timeout: 100,
Netmask: 128,
AddressFamily: unix.AF_INET6,
Address: netutils.ParseIPSloppy("2012::beef"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("2012::beef"),
Protocol: "UDP",
Port: 33434,
Scheduler: "wlc",
Flags: 1234,
Timeout: 100,
},
},
{
libipvs.Service{
Protocol: 0,
Port: 0,
FWMark: 0,
SchedName: "lc",
Flags: 0,
Timeout: 0,
Netmask: 0xffffffff,
AddressFamily: unix.AF_INET,
Address: netutils.ParseIPSloppy("1.2.3.4"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("1.2.3.4"),
Protocol: "",
Port: 0,
Scheduler: "lc",
Flags: 0,
Timeout: 0,
},
},
{
libipvs.Service{
Protocol: 0,
Port: 0,
FWMark: 0,
SchedName: "wrr",
Flags: 0,
Timeout: 0,
Netmask: 128,
AddressFamily: unix.AF_INET6,
Address: netutils.ParseIPSloppy("::0"),
PEName: "",
},
VirtualServer{
Address: netutils.ParseIPSloppy("::0"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
},
}
for i := range Tests {
got, err := toIPVSService(&Tests[i].virtualServer)
if err != nil {
t.Errorf("case: %d, unexpected error: %v", i, err)
}
if !reflect.DeepEqual(*got, Tests[i].ipvsService) {
t.Errorf("case: %d - got %#v, want %#v", i, *got, Tests[i].ipvsService)
}
}
}
func Test_toRealServer(t *testing.T) {
Tests := []struct {
ipvsDestination libipvs.Destination
realServer RealServer
}{
{
libipvs.Destination{
Port: 54321,
ConnectionFlags: 0,
Weight: 1,
Address: netutils.ParseIPSloppy("1.2.3.4"),
},
RealServer{
Address: netutils.ParseIPSloppy("1.2.3.4"),
Port: 54321,
Weight: 1,
},
},
{
libipvs.Destination{
Port: 53,
ConnectionFlags: 0,
Weight: 1,
Address: netutils.ParseIPSloppy("2002::cafe"),
},
RealServer{
Address: netutils.ParseIPSloppy("2002::cafe"),
Port: 53,
Weight: 1,
},
},
}
for i := range Tests {
got, err := toRealServer(&Tests[i].ipvsDestination)
if err != nil {
t.Errorf("case %d unexpected error: %v", i, err)
}
if !reflect.DeepEqual(*got, Tests[i].realServer) {
t.Errorf("case %d Failed to translate Destination - got %#v, want %#v", i, *got, Tests[i].realServer)
}
}
}
func Test_toIPVSDestination(t *testing.T) {
Tests := []struct {
realServer RealServer
ipvsDestination libipvs.Destination
}{
{
RealServer{
Address: netutils.ParseIPSloppy("1.2.3.4"),
Port: 54321,
Weight: 1,
},
libipvs.Destination{
Port: 54321,
ConnectionFlags: 0,
Weight: 1,
Address: netutils.ParseIPSloppy("1.2.3.4"),
},
},
{
RealServer{
Address: netutils.ParseIPSloppy("2002::cafe"),
Port: 53,
Weight: 1,
},
libipvs.Destination{
Port: 53,
ConnectionFlags: 0,
Weight: 1,
Address: netutils.ParseIPSloppy("2002::cafe"),
},
},
}
for i := range Tests {
got, err := toIPVSDestination(&Tests[i].realServer)
if err != nil {
t.Errorf("case %d unexpected error: %v", i, err)
}
if !reflect.DeepEqual(*got, Tests[i].ipvsDestination) {
t.Errorf("case %d failed to translate Destination - got %#v, want %#v", i, *got, Tests[i].ipvsDestination)
}
}
}
func Test_stringToProtocol(t *testing.T) {
tests := []string{
"TCP", "UDP", "ICMP", "SCTP",
}
expected := []uint16{
uint16(unix.IPPROTO_TCP), uint16(unix.IPPROTO_UDP), uint16(0), uint16(unix.IPPROTO_SCTP),
}
for i := range tests {
got := stringToProtocol(tests[i])
if got != expected[i] {
t.Errorf("stringToProtocol() failed - got %#v, want %#v",
got, expected[i])
}
}
}
func Test_protocolToString(t *testing.T) {
tests := []Protocol{
unix.IPPROTO_TCP, unix.IPPROTO_UDP, Protocol(0), unix.IPPROTO_SCTP,
}
expected := []string{
"TCP", "UDP", "", "SCTP",
}
for i := range tests {
got := protocolToString(tests[i])
if got != expected[i] {
t.Errorf("protocolToString() failed - got %#v, want %#v",
got, expected[i])
}
}
}