Use vendored ipvs package

The ipvs package was moved to a separate repo.

The ipvs package is a fairly generic set of helpers for managing IPVS.
The ipvs package is used by docker swarm and kubernetes.
Because we want to merge libnetwork back into the moby/moby codebase
while also not creating more dependencies for other projects on
moby/moby itself, it was decided that the best path for ipvs is to live
on it's own since there are no other ties to libnetwork.

Ref: https://github.com/moby/libnetwork/issues/2522

Signed-off-by: Brian Goff <cpuguy83@gmail.com>
This commit is contained in:
Brian Goff 2020-03-11 09:36:12 -07:00
parent c485bbf754
commit a533fe7094
9 changed files with 218 additions and 386 deletions

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@ -1,385 +0,0 @@
// +build linux
package ipvs
import (
"net"
"testing"
"time"
"github.com/docker/libnetwork/testutils"
"github.com/vishvananda/netlink"
"github.com/vishvananda/netlink/nl"
"golang.org/x/sys/unix"
"gotest.tools/assert"
is "gotest.tools/assert/cmp"
)
var (
schedMethods = []string{
RoundRobin,
LeastConnection,
DestinationHashing,
SourceHashing,
WeightedLeastConnection,
WeightedRoundRobin,
}
protocols = []string{
"TCP",
"UDP",
"FWM",
}
fwdMethods = []uint32{
ConnectionFlagMasq,
ConnectionFlagTunnel,
ConnectionFlagDirectRoute,
}
fwdMethodStrings = []string{
"Masq",
"Tunnel",
"Route",
}
)
func lookupFwMethod(fwMethod uint32) string {
switch fwMethod {
case ConnectionFlagMasq:
return fwdMethodStrings[0]
case ConnectionFlagTunnel:
return fwdMethodStrings[1]
case ConnectionFlagDirectRoute:
return fwdMethodStrings[2]
}
return ""
}
func checkDestination(t *testing.T, i *Handle, s *Service, d *Destination, checkPresent bool) {
var dstFound bool
dstArray, err := i.GetDestinations(s)
assert.NilError(t, err)
for _, dst := range dstArray {
if dst.Address.Equal(d.Address) && dst.Port == d.Port && lookupFwMethod(dst.ConnectionFlags) == lookupFwMethod(d.ConnectionFlags) {
dstFound = true
break
}
}
switch checkPresent {
case true: //The test expects the service to be present
if !dstFound {
t.Fatalf("Did not find the service %s in ipvs output", d.Address.String())
}
case false: //The test expects that the service should not be present
if dstFound {
t.Fatalf("Did not find the destination %s fwdMethod %s in ipvs output", d.Address.String(), lookupFwMethod(d.ConnectionFlags))
}
}
}
func checkService(t *testing.T, i *Handle, s *Service, checkPresent bool) {
svcArray, err := i.GetServices()
assert.NilError(t, err)
var svcFound bool
for _, svc := range svcArray {
if svc.Protocol == s.Protocol && svc.Address.String() == s.Address.String() && svc.Port == s.Port {
svcFound = true
break
}
}
switch checkPresent {
case true: //The test expects the service to be present
if !svcFound {
t.Fatalf("Did not find the service %s in ipvs output", s.Address.String())
}
case false: //The test expects that the service should not be present
if svcFound {
t.Fatalf("Did not expect the service %s in ipvs output", s.Address.String())
}
}
}
func TestGetFamily(t *testing.T) {
if testutils.RunningOnCircleCI() {
t.Skip("Skipping as not supported on CIRCLE CI kernel")
}
id, err := getIPVSFamily()
assert.NilError(t, err)
assert.Check(t, 0 != id)
}
func TestService(t *testing.T) {
if testutils.RunningOnCircleCI() {
t.Skip("Skipping as not supported on CIRCLE CI kernel")
}
defer testutils.SetupTestOSContext(t)()
i, err := New("")
assert.NilError(t, err)
for _, protocol := range protocols {
for _, schedMethod := range schedMethods {
testDatas := []struct {
AddressFamily uint16
IP string
Netmask uint32
}{
{
AddressFamily: nl.FAMILY_V4,
IP: "1.2.3.4",
Netmask: 0xFFFFFFFF,
}, {
AddressFamily: nl.FAMILY_V6,
IP: "2001:db8:3c4d:15::1a00",
Netmask: 128,
},
}
for _, td := range testDatas {
s := Service{
AddressFamily: td.AddressFamily,
SchedName: schedMethod,
}
switch protocol {
case "FWM":
s.FWMark = 1234
s.Netmask = td.Netmask
case "TCP":
s.Protocol = unix.IPPROTO_TCP
s.Port = 80
s.Address = net.ParseIP(td.IP)
s.Netmask = td.Netmask
case "UDP":
s.Protocol = unix.IPPROTO_UDP
s.Port = 53
s.Address = net.ParseIP(td.IP)
s.Netmask = td.Netmask
}
err := i.NewService(&s)
assert.NilError(t, err)
checkService(t, i, &s, true)
for _, updateSchedMethod := range schedMethods {
if updateSchedMethod == schedMethod {
continue
}
s.SchedName = updateSchedMethod
err = i.UpdateService(&s)
assert.NilError(t, err)
checkService(t, i, &s, true)
scopy, err := i.GetService(&s)
assert.NilError(t, err)
assert.Check(t, is.Equal((*scopy).Address.String(), s.Address.String()))
assert.Check(t, is.Equal((*scopy).Port, s.Port))
assert.Check(t, is.Equal((*scopy).Protocol, s.Protocol))
}
err = i.DelService(&s)
assert.NilError(t, err)
checkService(t, i, &s, false)
}
}
}
svcs := []Service{
{
AddressFamily: nl.FAMILY_V4,
SchedName: RoundRobin,
Protocol: unix.IPPROTO_TCP,
Port: 80,
Address: net.ParseIP("10.20.30.40"),
Netmask: 0xFFFFFFFF,
},
{
AddressFamily: nl.FAMILY_V4,
SchedName: LeastConnection,
Protocol: unix.IPPROTO_UDP,
Port: 8080,
Address: net.ParseIP("10.20.30.41"),
Netmask: 0xFFFFFFFF,
},
}
// Create services for testing flush
for _, svc := range svcs {
if !i.IsServicePresent(&svc) {
err = i.NewService(&svc)
assert.NilError(t, err)
checkService(t, i, &svc, true)
} else {
t.Errorf("svc: %v exists", svc)
}
}
err = i.Flush()
assert.NilError(t, err)
got, err := i.GetServices()
assert.NilError(t, err)
if len(got) != 0 {
t.Errorf("Unexpected services after flush")
}
}
func createDummyInterface(t *testing.T) {
if testutils.RunningOnCircleCI() {
t.Skip("Skipping as not supported on CIRCLE CI kernel")
}
dummy := &netlink.Dummy{
LinkAttrs: netlink.LinkAttrs{
Name: "dummy",
},
}
err := netlink.LinkAdd(dummy)
assert.NilError(t, err)
dummyLink, err := netlink.LinkByName("dummy")
assert.NilError(t, err)
ip, ipNet, err := net.ParseCIDR("10.1.1.1/24")
assert.NilError(t, err)
ipNet.IP = ip
ipAddr := &netlink.Addr{IPNet: ipNet, Label: ""}
err = netlink.AddrAdd(dummyLink, ipAddr)
assert.NilError(t, err)
}
func TestDestination(t *testing.T) {
defer testutils.SetupTestOSContext(t)()
createDummyInterface(t)
i, err := New("")
assert.NilError(t, err)
for _, protocol := range protocols {
testDatas := []struct {
AddressFamily uint16
IP string
Netmask uint32
Destinations []string
}{
{
AddressFamily: nl.FAMILY_V4,
IP: "1.2.3.4",
Netmask: 0xFFFFFFFF,
Destinations: []string{"10.1.1.2", "10.1.1.3", "10.1.1.4"},
}, {
AddressFamily: nl.FAMILY_V6,
IP: "2001:db8:3c4d:15::1a00",
Netmask: 128,
Destinations: []string{"2001:db8:3c4d:15::1a2b", "2001:db8:3c4d:15::1a2c", "2001:db8:3c4d:15::1a2d"},
},
}
for _, td := range testDatas {
s := Service{
AddressFamily: td.AddressFamily,
SchedName: RoundRobin,
}
switch protocol {
case "FWM":
s.FWMark = 1234
s.Netmask = td.Netmask
case "TCP":
s.Protocol = unix.IPPROTO_TCP
s.Port = 80
s.Address = net.ParseIP(td.IP)
s.Netmask = td.Netmask
case "UDP":
s.Protocol = unix.IPPROTO_UDP
s.Port = 53
s.Address = net.ParseIP(td.IP)
s.Netmask = td.Netmask
}
err := i.NewService(&s)
assert.NilError(t, err)
checkService(t, i, &s, true)
s.SchedName = ""
for _, fwdMethod := range fwdMethods {
destinations := make([]Destination, 0)
for _, ip := range td.Destinations {
d := Destination{
AddressFamily: td.AddressFamily,
Address: net.ParseIP(ip),
Port: 5000,
Weight: 1,
ConnectionFlags: fwdMethod,
}
destinations = append(destinations, d)
err := i.NewDestination(&s, &d)
assert.NilError(t, err)
checkDestination(t, i, &s, &d, true)
}
for _, updateFwdMethod := range fwdMethods {
if updateFwdMethod == fwdMethod {
continue
}
for _, d := range destinations {
d.ConnectionFlags = updateFwdMethod
err = i.UpdateDestination(&s, &d)
assert.NilError(t, err)
checkDestination(t, i, &s, &d, true)
}
}
for _, d := range destinations {
err = i.DelDestination(&s, &d)
assert.NilError(t, err)
checkDestination(t, i, &s, &d, false)
}
}
}
}
}
func TestTimeouts(t *testing.T) {
if testutils.RunningOnCircleCI() {
t.Skip("Skipping as not supported on CIRCLE CI kernel")
}
defer testutils.SetupTestOSContext(t)()
i, err := New("")
assert.NilError(t, err)
_, err = i.GetConfig()
assert.NilError(t, err)
cfg := Config{66 * time.Second, 66 * time.Second, 66 * time.Second}
err = i.SetConfig(&cfg)
assert.NilError(t, err)
c2, err := i.GetConfig()
assert.NilError(t, err)
assert.DeepEqual(t, cfg, *c2)
// A timeout value 0 means that the current timeout value of the corresponding entry is preserved
cfg = Config{77 * time.Second, 0 * time.Second, 77 * time.Second}
err = i.SetConfig(&cfg)
assert.NilError(t, err)
c3, err := i.GetConfig()
assert.NilError(t, err)
assert.DeepEqual(t, *c3, Config{77 * time.Second, 66 * time.Second, 77 * time.Second})
}

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@ -16,10 +16,10 @@ import (
"github.com/docker/docker/pkg/reexec"
"github.com/docker/libnetwork/iptables"
"github.com/docker/libnetwork/ipvs"
"github.com/docker/libnetwork/ns"
"github.com/gogo/protobuf/proto"
"github.com/ishidawataru/sctp"
"github.com/moby/ipvs"
"github.com/sirupsen/logrus"
"github.com/vishvananda/netlink/nl"
"github.com/vishvananda/netns"

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@ -57,3 +57,5 @@ go.opencensus.io 9c377598961b706d1542bd2d84d538b5094d596e
gotest.tools 1083505acf35a0bd8a696b26837e1fb3187a7a83 # v2.3.0
github.com/google/go-cmp 3af367b6b30c263d47e8895973edcca9a49cf029 # v0.2.0
github.com/moby/ipvs 45bd6e080830fe2f2a43320b154d82b8f3f5aa0c

202
libnetwork/vendor/github.com/moby/ipvs/LICENSE generated vendored Normal file
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@ -0,0 +1,202 @@
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http://www.apache.org/licenses/
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1
libnetwork/vendor/github.com/moby/ipvs/doc.go generated vendored Normal file
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@ -0,0 +1 @@
package ipvs

12
libnetwork/vendor/github.com/moby/ipvs/go.mod generated vendored Normal file
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@ -0,0 +1,12 @@
module github.com/moby/ipvs
go 1.13
require (
github.com/pkg/errors v0.8.1 // indirect
github.com/sirupsen/logrus v1.4.1
github.com/vishvananda/netlink v1.0.0
github.com/vishvananda/netns v0.0.0-20190625233234-7109fa855b0f
golang.org/x/sys v0.0.0-20190303122642-d455e41777fc
gotest.tools v1.4.1-0.20181223230014-1083505acf35
)