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kubernetes/pkg/util/ipvs/ipvs_test.go
Emrecan BATI 90ce2d50d3 Add GetKernelVersion to ipvs.KernelHandler interface 
ipvs `getProxyMode` test fails on mac as `utilipvs.GetRequiredIPVSMods`
try to reach `/proc/sys/kernel/osrelease` to find version of the running
linux kernel. Linux kernel version is used to determine the list of required
kernel modules for ipvs.

Logic to determine kernel version is moved to GetKernelVersion
method in LinuxKernelHandler which implements ipvs.KernelHandler.
Mock KernelHandler is used in the test cases.

Read and parse file is converted to go function instead of execing cut.
2019-07-31 22:10:44 +03:00

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/*
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 (
"net"
"reflect"
"sort"
"testing"
"k8s.io/apimachinery/pkg/util/version"
)
func TestVirtualServerEqual(t *testing.T) {
Tests := []struct {
svcA *VirtualServer
svcB *VirtualServer
equal bool
reason string
}{
{
svcA: &VirtualServer{
Address: net.ParseIP("10.20.30.40"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("10.20.30.41"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "IPv4 address not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("2017::beef"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "IPv6 address not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "TCP",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("2012::beeef"),
Protocol: "UDP",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "Protocol not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "TCP",
Port: 80,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "TCP",
Port: 8080,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "Port not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "rr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "wlc",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "Scheduler not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "rr",
Flags: 2,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "rr",
Flags: 3,
Timeout: 0,
},
equal: false,
reason: "Flags not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 10800,
},
equal: false,
reason: "Timeout not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "rr",
Flags: 0x1,
Timeout: 10800,
},
svcB: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "TCP",
Port: 80,
Scheduler: "rr",
Flags: 0x1,
Timeout: 10800,
},
equal: true,
reason: "All fields equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "TCP",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
svcB: &VirtualServer{
Address: net.ParseIP("2012::beeef"),
Protocol: "SCTP",
Port: 0,
Scheduler: "wrr",
Flags: 0,
Timeout: 0,
},
equal: false,
reason: "Protocol not equal",
},
{
svcA: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "SCTP",
Port: 80,
Scheduler: "rr",
Flags: 0x1,
Timeout: 10800,
},
svcB: &VirtualServer{
Address: net.ParseIP("1.2.3.4"),
Protocol: "SCTP",
Port: 80,
Scheduler: "rr",
Flags: 0x1,
Timeout: 10800,
},
equal: true,
reason: "All fields equal",
},
}
for i := range Tests {
equal := Tests[i].svcA.Equal(Tests[i].svcB)
if equal != Tests[i].equal {
t.Errorf("case: %d got %v, expected %v, reason: %s", i, equal, Tests[i].equal, Tests[i].reason)
}
}
}
func TestRealServerEqual(t *testing.T) {
Tests := []struct {
rsA *RealServer
rsB *RealServer
equal bool
reason string
}{
{
rsA: &RealServer{
Address: net.ParseIP("10.20.30.40"),
Port: 80,
},
rsB: &RealServer{
Address: net.ParseIP("10.20.30.41"),
Port: 80,
},
equal: false,
reason: "IPv4 address not equal",
},
{
rsA: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 80,
},
rsB: &RealServer{
Address: net.ParseIP("2017::beef"),
Port: 80,
},
equal: false,
reason: "IPv6 address not equal",
},
{
rsA: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 80,
},
rsB: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 8080,
},
equal: false,
reason: "Port not equal",
},
{
rsA: &RealServer{
Address: net.ParseIP("1.2.3.4"),
Port: 3080,
},
rsB: &RealServer{
Address: net.ParseIP("1.2.3.4"),
Port: 3080,
},
equal: true,
reason: "All fields equal",
},
{
rsA: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 3080,
},
rsB: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 3080,
},
equal: true,
reason: "All fields equal",
},
}
for i := range Tests {
equal := Tests[i].rsA.Equal(Tests[i].rsB)
if equal != Tests[i].equal {
t.Errorf("case: %d got %v, expected %v, reason: %s", i, equal, Tests[i].equal, Tests[i].reason)
}
}
}
func TestFrontendServiceString(t *testing.T) {
Tests := []struct {
svc *VirtualServer
expected string
}{
{
svc: &VirtualServer{
Address: net.ParseIP("10.20.30.40"),
Protocol: "TCP",
Port: 80,
},
expected: "10.20.30.40:80/TCP",
},
{
svc: &VirtualServer{
Address: net.ParseIP("2012::beef"),
Protocol: "UDP",
Port: 8080,
},
expected: "[2012::beef]:8080/UDP",
},
{
svc: &VirtualServer{
Address: net.ParseIP("10.20.30.41"),
Protocol: "ESP",
Port: 1234,
},
expected: "10.20.30.41:1234/ESP",
},
}
for i := range Tests {
if Tests[i].expected != Tests[i].svc.String() {
t.Errorf("case: %d got %v, expected %v", i, Tests[i].svc.String(), Tests[i].expected)
}
}
}
func TestFrontendDestinationString(t *testing.T) {
Tests := []struct {
svc *RealServer
expected string
}{
{
svc: &RealServer{
Address: net.ParseIP("10.20.30.40"),
Port: 80,
},
expected: "10.20.30.40:80",
},
{
svc: &RealServer{
Address: net.ParseIP("2012::beef"),
Port: 8080,
},
expected: "[2012::beef]:8080",
},
}
for i := range Tests {
if Tests[i].expected != Tests[i].svc.String() {
t.Errorf("case: %d got %v, expected %v", i, Tests[i].svc.String(), Tests[i].expected)
}
}
}
func TestGetRequiredIPVSModules(t *testing.T) {
Tests := []struct {
name string
kernelVersion *version.Version
want []string
}{
{
name: "kernel version < 4.19",
kernelVersion: version.MustParseGeneric("4.18"),
want: []string{KernelModuleIPVS, KernelModuleIPVSRR, KernelModuleIPVSWRR, KernelModuleIPVSSH, KernelModuleNfConntrackIPV4},
},
{
name: "kernel version 4.19",
kernelVersion: version.MustParseGeneric("4.19"),
want: []string{KernelModuleIPVS, KernelModuleIPVSRR, KernelModuleIPVSWRR, KernelModuleIPVSSH, KernelModuleNfConntrack},
},
}
for _, test := range Tests {
t.Run(test.name, func(t *testing.T) {
got := GetRequiredIPVSModules(test.kernelVersion)
sort.Strings(got)
sort.Strings(test.want)
if !reflect.DeepEqual(got, test.want) {
t.Errorf("GetRequiredIPVSMods() = %v for kenel version: %s, want %v", got, test.kernelVersion, test.want)
}
})
}
}
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