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Merge pull request #360 from mrjana/cnm

Cherry picks from docker1.7_integ branch
This commit is contained in:
Jana Radhakrishnan 2015-07-02 10:51:23 -07:00
commit 0dbbe8b696
28 changed files with 2262 additions and 73 deletions

View file

@ -69,6 +69,11 @@
"Comment": "v1.4.1-4106-g637023a",
"Rev": "637023a5f8d8347a0e271c09d5c9bc84fbc97693"
},
{
"ImportPath": "github.com/docker/libcontainer/netlink",
"Comment": "v1.4.0-495-g3e66118",
"Rev": "3e661186ba24f259d3860f067df052c7f6904bee"
},
{
"ImportPath": "github.com/docker/libcontainer/user",
"Comment": "v1.4.0-495-g3e66118",
@ -127,7 +132,7 @@
},
{
"ImportPath": "github.com/vishvananda/netlink",
"Rev": "8eb64238879fed52fd51c5b30ad20b928fb4c36c"
"Rev": "20397a138846e4d6590e01783ed023ed7e1c38a6"
},
{
"ImportPath": "github.com/vishvananda/netns",

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@ -0,0 +1,2 @@
Michael Crosby <michael@crosbymichael.com> (@crosbymichael)
Guillaume J. Charmes <guillaume@docker.com> (@creack)

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@ -0,0 +1,31 @@
// Packet netlink provide access to low level Netlink sockets and messages.
//
// Actual implementations are in:
// netlink_linux.go
// netlink_darwin.go
package netlink
import (
"errors"
"net"
)
var (
ErrWrongSockType = errors.New("Wrong socket type")
ErrShortResponse = errors.New("Got short response from netlink")
ErrInterfaceExists = errors.New("Network interface already exists")
)
// A Route is a subnet associated with the interface to reach it.
type Route struct {
*net.IPNet
Iface *net.Interface
Default bool
}
// An IfAddr defines IP network settings for a given network interface
type IfAddr struct {
Iface *net.Interface
IP net.IP
IPNet *net.IPNet
}

File diff suppressed because it is too large Load diff

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@ -0,0 +1,5 @@
package netlink
func ifrDataByte(b byte) uint8 {
return uint8(b)
}

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@ -0,0 +1,7 @@
// +build !arm
package netlink
func ifrDataByte(b byte) int8 {
return int8(b)
}

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@ -0,0 +1,408 @@
package netlink
import (
"net"
"strings"
"syscall"
"testing"
)
type testLink struct {
name string
linkType string
}
func addLink(t *testing.T, name string, linkType string) {
if err := NetworkLinkAdd(name, linkType); err != nil {
t.Fatalf("Unable to create %s link: %s", name, err)
}
}
func readLink(t *testing.T, name string) *net.Interface {
iface, err := net.InterfaceByName(name)
if err != nil {
t.Fatalf("Could not find %s interface: %s", name, err)
}
return iface
}
func deleteLink(t *testing.T, name string) {
if err := NetworkLinkDel(name); err != nil {
t.Fatalf("Unable to delete %s link: %s", name, err)
}
}
func upLink(t *testing.T, name string) {
iface := readLink(t, name)
if err := NetworkLinkUp(iface); err != nil {
t.Fatalf("Could not bring UP %#v interface: %s", iface, err)
}
}
func downLink(t *testing.T, name string) {
iface := readLink(t, name)
if err := NetworkLinkDown(iface); err != nil {
t.Fatalf("Could not bring DOWN %#v interface: %s", iface, err)
}
}
func ipAssigned(iface *net.Interface, ip net.IP) bool {
addrs, _ := iface.Addrs()
for _, addr := range addrs {
args := strings.SplitN(addr.String(), "/", 2)
if args[0] == ip.String() {
return true
}
}
return false
}
func TestNetworkLinkAddDel(t *testing.T) {
if testing.Short() {
return
}
testLinks := []testLink{
{"tstEth", "dummy"},
{"tstBr", "bridge"},
}
for _, tl := range testLinks {
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
readLink(t, tl.name)
}
}
func TestNetworkLinkUpDown(t *testing.T) {
if testing.Short() {
return
}
tl := testLink{name: "tstEth", linkType: "dummy"}
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
upLink(t, tl.name)
ifcAfterUp := readLink(t, tl.name)
if (ifcAfterUp.Flags & syscall.IFF_UP) != syscall.IFF_UP {
t.Fatalf("Could not bring UP %#v initerface", tl)
}
downLink(t, tl.name)
ifcAfterDown := readLink(t, tl.name)
if (ifcAfterDown.Flags & syscall.IFF_UP) == syscall.IFF_UP {
t.Fatalf("Could not bring DOWN %#v initerface", tl)
}
}
func TestNetworkSetMacAddress(t *testing.T) {
if testing.Short() {
return
}
tl := testLink{name: "tstEth", linkType: "dummy"}
macaddr := "22:ce:e0:99:63:6f"
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
ifcBeforeSet := readLink(t, tl.name)
if err := NetworkSetMacAddress(ifcBeforeSet, macaddr); err != nil {
t.Fatalf("Could not set %s MAC address on %#v interface: %s", macaddr, tl, err)
}
ifcAfterSet := readLink(t, tl.name)
if ifcAfterSet.HardwareAddr.String() != macaddr {
t.Fatalf("Could not set %s MAC address on %#v interface", macaddr, tl)
}
}
func TestNetworkSetMTU(t *testing.T) {
if testing.Short() {
return
}
tl := testLink{name: "tstEth", linkType: "dummy"}
mtu := 1400
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
ifcBeforeSet := readLink(t, tl.name)
if err := NetworkSetMTU(ifcBeforeSet, mtu); err != nil {
t.Fatalf("Could not set %d MTU on %#v interface: %s", mtu, tl, err)
}
ifcAfterSet := readLink(t, tl.name)
if ifcAfterSet.MTU != mtu {
t.Fatalf("Could not set %d MTU on %#v interface", mtu, tl)
}
}
func TestNetworkSetMasterNoMaster(t *testing.T) {
if testing.Short() {
return
}
master := testLink{"tstBr", "bridge"}
slave := testLink{"tstEth", "dummy"}
testLinks := []testLink{master, slave}
for _, tl := range testLinks {
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
upLink(t, tl.name)
}
masterIfc := readLink(t, master.name)
slaveIfc := readLink(t, slave.name)
if err := NetworkSetMaster(slaveIfc, masterIfc); err != nil {
t.Fatalf("Could not set %#v to be the master of %#v: %s", master, slave, err)
}
// Trying to figure out a way to test which will not break on RHEL6.
// We could check for existence of /sys/class/net/tstEth/upper_tstBr
// which should point to the ../tstBr which is the UPPER device i.e. network bridge
if err := NetworkSetNoMaster(slaveIfc); err != nil {
t.Fatalf("Could not UNset %#v master of %#v: %s", master, slave, err)
}
}
func TestNetworkChangeName(t *testing.T) {
if testing.Short() {
return
}
tl := testLink{"tstEth", "dummy"}
newName := "newTst"
addLink(t, tl.name, tl.linkType)
linkIfc := readLink(t, tl.name)
if err := NetworkChangeName(linkIfc, newName); err != nil {
deleteLink(t, tl.name)
t.Fatalf("Could not change %#v interface name to %s: %s", tl, newName, err)
}
readLink(t, newName)
deleteLink(t, newName)
}
func TestNetworkLinkAddVlan(t *testing.T) {
if testing.Short() {
return
}
tl := struct {
name string
id uint16
}{
name: "tstVlan",
id: 32,
}
masterLink := testLink{"tstEth", "dummy"}
addLink(t, masterLink.name, masterLink.linkType)
defer deleteLink(t, masterLink.name)
if err := NetworkLinkAddVlan(masterLink.name, tl.name, tl.id); err != nil {
t.Fatalf("Unable to create %#v VLAN interface: %s", tl, err)
}
readLink(t, tl.name)
}
func TestNetworkLinkAddMacVlan(t *testing.T) {
if testing.Short() {
return
}
tl := struct {
name string
mode string
}{
name: "tstVlan",
mode: "private",
}
masterLink := testLink{"tstEth", "dummy"}
addLink(t, masterLink.name, masterLink.linkType)
defer deleteLink(t, masterLink.name)
if err := NetworkLinkAddMacVlan(masterLink.name, tl.name, tl.mode); err != nil {
t.Fatalf("Unable to create %#v MAC VLAN interface: %s", tl, err)
}
readLink(t, tl.name)
}
func TestNetworkLinkAddMacVtap(t *testing.T) {
if testing.Short() {
return
}
tl := struct {
name string
mode string
}{
name: "tstVtap",
mode: "private",
}
masterLink := testLink{"tstEth", "dummy"}
addLink(t, masterLink.name, masterLink.linkType)
defer deleteLink(t, masterLink.name)
if err := NetworkLinkAddMacVtap(masterLink.name, tl.name, tl.mode); err != nil {
t.Fatalf("Unable to create %#v MAC VTAP interface: %s", tl, err)
}
readLink(t, tl.name)
}
func TestAddDelNetworkIp(t *testing.T) {
if testing.Short() {
return
}
ifaceName := "lo"
ip := net.ParseIP("127.0.1.1")
mask := net.IPv4Mask(255, 255, 255, 255)
ipNet := &net.IPNet{IP: ip, Mask: mask}
iface, err := net.InterfaceByName(ifaceName)
if err != nil {
t.Skip("No 'lo' interface; skipping tests")
}
if err := NetworkLinkAddIp(iface, ip, ipNet); err != nil {
t.Fatalf("Could not add IP address %s to interface %#v: %s", ip.String(), iface, err)
}
if !ipAssigned(iface, ip) {
t.Fatalf("Could not locate address '%s' in lo address list.", ip.String())
}
if err := NetworkLinkDelIp(iface, ip, ipNet); err != nil {
t.Fatalf("Could not delete IP address %s from interface %#v: %s", ip.String(), iface, err)
}
if ipAssigned(iface, ip) {
t.Fatalf("Located address '%s' in lo address list after removal.", ip.String())
}
}
func TestAddRouteSourceSelection(t *testing.T) {
tstIp := "127.1.1.1"
tl := testLink{name: "tstEth", linkType: "dummy"}
addLink(t, tl.name, tl.linkType)
defer deleteLink(t, tl.name)
ip := net.ParseIP(tstIp)
mask := net.IPv4Mask(255, 255, 255, 255)
ipNet := &net.IPNet{IP: ip, Mask: mask}
iface, err := net.InterfaceByName(tl.name)
if err != nil {
t.Fatalf("Lost created link %#v", tl)
}
if err := NetworkLinkAddIp(iface, ip, ipNet); err != nil {
t.Fatalf("Could not add IP address %s to interface %#v: %s", ip.String(), iface, err)
}
upLink(t, tl.name)
defer downLink(t, tl.name)
if err := AddRoute("127.0.0.0/8", tstIp, "", tl.name); err != nil {
t.Fatalf("Failed to add route with source address")
}
}
func TestCreateVethPair(t *testing.T) {
if testing.Short() {
return
}
var (
name1 = "veth1"
name2 = "veth2"
)
if err := NetworkCreateVethPair(name1, name2, 0); err != nil {
t.Fatalf("Could not create veth pair %s %s: %s", name1, name2, err)
}
defer NetworkLinkDel(name1)
readLink(t, name1)
readLink(t, name2)
}
//
// netlink package tests which do not use RTNETLINK
//
func TestCreateBridgeWithMac(t *testing.T) {
if testing.Short() {
return
}
name := "testbridge"
if err := CreateBridge(name, true); err != nil {
t.Fatal(err)
}
if _, err := net.InterfaceByName(name); err != nil {
t.Fatal(err)
}
// cleanup and tests
if err := DeleteBridge(name); err != nil {
t.Fatal(err)
}
if _, err := net.InterfaceByName(name); err == nil {
t.Fatalf("expected error getting interface because %s bridge was deleted", name)
}
}
func TestSetMacAddress(t *testing.T) {
if testing.Short() {
return
}
name := "testmac"
mac := randMacAddr()
if err := NetworkLinkAdd(name, "bridge"); err != nil {
t.Fatal(err)
}
defer NetworkLinkDel(name)
if err := SetMacAddress(name, mac); err != nil {
t.Fatal(err)
}
iface, err := net.InterfaceByName(name)
if err != nil {
t.Fatal(err)
}
if iface.HardwareAddr.String() != mac {
t.Fatalf("mac address %q does not match %q", iface.HardwareAddr, mac)
}
}

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@ -0,0 +1,88 @@
// +build !linux
package netlink
import (
"errors"
"net"
)
var (
ErrNotImplemented = errors.New("not implemented")
)
func NetworkGetRoutes() ([]Route, error) {
return nil, ErrNotImplemented
}
func NetworkLinkAdd(name string, linkType string) error {
return ErrNotImplemented
}
func NetworkLinkDel(name string) error {
return ErrNotImplemented
}
func NetworkLinkUp(iface *net.Interface) error {
return ErrNotImplemented
}
func NetworkLinkAddIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
return ErrNotImplemented
}
func NetworkLinkDelIp(iface *net.Interface, ip net.IP, ipNet *net.IPNet) error {
return ErrNotImplemented
}
func AddRoute(destination, source, gateway, device string) error {
return ErrNotImplemented
}
func AddDefaultGw(ip, device string) error {
return ErrNotImplemented
}
func NetworkSetMTU(iface *net.Interface, mtu int) error {
return ErrNotImplemented
}
func NetworkSetTxQueueLen(iface *net.Interface, txQueueLen int) error {
return ErrNotImplemented
}
func NetworkCreateVethPair(name1, name2 string, txQueueLen int) error {
return ErrNotImplemented
}
func NetworkChangeName(iface *net.Interface, newName string) error {
return ErrNotImplemented
}
func NetworkSetNsFd(iface *net.Interface, fd int) error {
return ErrNotImplemented
}
func NetworkSetNsPid(iface *net.Interface, nspid int) error {
return ErrNotImplemented
}
func NetworkSetMaster(iface, master *net.Interface) error {
return ErrNotImplemented
}
func NetworkLinkDown(iface *net.Interface) error {
return ErrNotImplemented
}
func CreateBridge(name string, setMacAddr bool) error {
return ErrNotImplemented
}
func DeleteBridge(name string) error {
return ErrNotImplemented
}
func AddToBridge(iface, master *net.Interface) error {
return ErrNotImplemented
}

View file

@ -43,13 +43,19 @@ import (
)
func main() {
mybridge := &netlink.Bridge{netlink.LinkAttrs{Name: "foo"}}
la := netlink.NewLinkAttrs()
la.Name = "foo"
mybridge := &netlink.Bridge{la}}
_ := netlink.LinkAdd(mybridge)
eth1, _ := netlink.LinkByName("eth1")
netlink.LinkSetMaster(eth1, mybridge)
}
```
Note `NewLinkAttrs` constructor, it sets default values in structure. For now
it sets only `TxQLen` to `-1`, so kernel will set default by itself. If you're
using simple initialization(`LinkAttrs{Name: "foo"}`) `TxQLen` will be set to
`0` unless you specify it like `LinkAttrs{Name: "foo", TxQLen: 1000}`.
Add a new ip address to loopback:

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@ -14,8 +14,8 @@ type Addr struct {
}
// String returns $ip/$netmask $label
func (addr Addr) String() string {
return fmt.Sprintf("%s %s", addr.IPNet, addr.Label)
func (a Addr) String() string {
return fmt.Sprintf("%s %s", a.IPNet, a.Label)
}
// ParseAddr parses the string representation of an address in the

View file

@ -81,7 +81,7 @@ func AddrList(link Link, family int) ([]Addr, error) {
index = base.Index
}
res := make([]Addr, 0)
var res []Addr
for _, m := range msgs {
msg := nl.DeserializeIfAddrmsg(m)
@ -95,11 +95,17 @@ func AddrList(link Link, family int) ([]Addr, error) {
return nil, err
}
var local, dst *net.IPNet
var addr Addr
for _, attr := range attrs {
switch attr.Attr.Type {
case syscall.IFA_ADDRESS:
addr.IPNet = &net.IPNet{
dst = &net.IPNet{
IP: attr.Value,
Mask: net.CIDRMask(int(msg.Prefixlen), 8*len(attr.Value)),
}
case syscall.IFA_LOCAL:
local = &net.IPNet{
IP: attr.Value,
Mask: net.CIDRMask(int(msg.Prefixlen), 8*len(attr.Value)),
}
@ -107,6 +113,14 @@ func AddrList(link Link, family int) ([]Addr, error) {
addr.Label = string(attr.Value[:len(attr.Value)-1])
}
}
// IFA_LOCAL should be there but if not, fall back to IFA_ADDRESS
if local != nil {
addr.IPNet = local
} else {
addr.IPNet = dst
}
res = append(res, addr)
}

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@ -10,16 +10,29 @@ type Link interface {
Type() string
}
type (
NsPid int
NsFd int
)
// LinkAttrs represents data shared by most link types
type LinkAttrs struct {
Index int
MTU int
TxQLen uint32 // Transmit Queue Length
TxQLen int // Transmit Queue Length
Name string
HardwareAddr net.HardwareAddr
Flags net.Flags
ParentIndex int // index of the parent link device
MasterIndex int // must be the index of a bridge
ParentIndex int // index of the parent link device
MasterIndex int // must be the index of a bridge
Namespace interface{} // nil | NsPid | NsFd
}
// NewLinkAttrs returns LinkAttrs structure filled with default values
func NewLinkAttrs() LinkAttrs {
return LinkAttrs{
TxQLen: -1,
}
}
// Device links cannot be created via netlink. These links
@ -76,9 +89,21 @@ func (vlan *Vlan) Type() string {
return "vlan"
}
type MacvlanMode uint16
const (
MACVLAN_MODE_DEFAULT MacvlanMode = iota
MACVLAN_MODE_PRIVATE
MACVLAN_MODE_VEPA
MACVLAN_MODE_BRIDGE
MACVLAN_MODE_PASSTHRU
MACVLAN_MODE_SOURCE
)
// Macvlan links have ParentIndex set in their Attrs()
type Macvlan struct {
LinkAttrs
Mode MacvlanMode
}
func (macvlan *Macvlan) Attrs() *LinkAttrs {

View file

@ -13,6 +13,15 @@ import (
var native = nl.NativeEndian()
var lookupByDump = false
var macvlanModes = [...]uint32{
0,
nl.MACVLAN_MODE_PRIVATE,
nl.MACVLAN_MODE_VEPA,
nl.MACVLAN_MODE_BRIDGE,
nl.MACVLAN_MODE_PASSTHRU,
nl.MACVLAN_MODE_SOURCE,
}
func ensureIndex(link *LinkAttrs) {
if link != nil && link.Index == 0 {
newlink, _ := LinkByName(link.Name)
@ -39,7 +48,7 @@ func LinkSetUp(link Link) error {
return err
}
// LinkSetUp disables link device.
// LinkSetDown disables link device.
// Equivalent to: `ip link set $link down`
func LinkSetDown(link Link) error {
base := link.Attrs()
@ -67,7 +76,7 @@ func LinkSetMTU(link Link, mtu int) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_MTU
req.AddData(msg)
b := make([]byte, 4)
@ -91,7 +100,7 @@ func LinkSetName(link Link, name string) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_IFNAME
req.AddData(msg)
data := nl.NewRtAttr(syscall.IFLA_IFNAME, []byte(name))
@ -112,7 +121,7 @@ func LinkSetHardwareAddr(link Link, hwaddr net.HardwareAddr) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_ADDRESS
req.AddData(msg)
data := nl.NewRtAttr(syscall.IFLA_ADDRESS, []byte(hwaddr))
@ -145,7 +154,7 @@ func LinkSetMasterByIndex(link Link, masterIndex int) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_MASTER
req.AddData(msg)
b := make([]byte, 4)
@ -170,7 +179,7 @@ func LinkSetNsPid(link Link, nspid int) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_NET_NS_PID
req.AddData(msg)
b := make([]byte, 4)
@ -183,7 +192,7 @@ func LinkSetNsPid(link Link, nspid int) error {
return err
}
// LinkSetNsPid puts the device into a new network namespace. The
// LinkSetNsFd puts the device into a new network namespace. The
// fd must be an open file descriptor to a network namespace.
// Similar to: `ip link set $link netns $ns`
func LinkSetNsFd(link Link, fd int) error {
@ -195,7 +204,7 @@ func LinkSetNsFd(link Link, fd int) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = nl.IFLA_NET_NS_FD
req.AddData(msg)
b := make([]byte, 4)
@ -312,11 +321,28 @@ func LinkAdd(link Link) error {
req.AddData(mtu)
}
if base.TxQLen >= 0 {
qlen := nl.NewRtAttr(syscall.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
req.AddData(qlen)
}
if base.Namespace != nil {
var attr *nl.RtAttr
switch base.Namespace.(type) {
case NsPid:
val := nl.Uint32Attr(uint32(base.Namespace.(NsPid)))
attr = nl.NewRtAttr(syscall.IFLA_NET_NS_PID, val)
case NsFd:
val := nl.Uint32Attr(uint32(base.Namespace.(NsFd)))
attr = nl.NewRtAttr(nl.IFLA_NET_NS_FD, val)
}
req.AddData(attr)
}
linkInfo := nl.NewRtAttr(syscall.IFLA_LINKINFO, nil)
nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_KIND, nl.NonZeroTerminated(link.Type()))
nl.NewRtAttrChild(linkInfo, syscall.IFLA_TXQLEN, nl.Uint32Attr(base.TxQLen))
if vlan, ok := link.(*Vlan); ok {
b := make([]byte, 2)
native.PutUint16(b, uint16(vlan.VlanId))
@ -327,15 +353,23 @@ func LinkAdd(link Link) error {
peer := nl.NewRtAttrChild(data, nl.VETH_INFO_PEER, nil)
nl.NewIfInfomsgChild(peer, syscall.AF_UNSPEC)
nl.NewRtAttrChild(peer, syscall.IFLA_IFNAME, nl.ZeroTerminated(veth.PeerName))
nl.NewRtAttrChild(peer, syscall.IFLA_TXQLEN, nl.Uint32Attr(base.TxQLen))
if base.TxQLen >= 0 {
nl.NewRtAttrChild(peer, syscall.IFLA_TXQLEN, nl.Uint32Attr(uint32(base.TxQLen)))
}
if base.MTU > 0 {
nl.NewRtAttrChild(peer, syscall.IFLA_MTU, nl.Uint32Attr(uint32(base.MTU)))
}
} else if vxlan, ok := link.(*Vxlan); ok {
addVxlanAttrs(vxlan, linkInfo)
} else if ipv, ok := link.(*IPVlan); ok {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
nl.NewRtAttrChild(data, nl.IFLA_IPVLAN_MODE, nl.Uint16Attr(uint16(ipv.Mode)))
} else if macv, ok := link.(*Macvlan); ok {
if macv.Mode != MACVLAN_MODE_DEFAULT {
data := nl.NewRtAttrChild(linkInfo, nl.IFLA_INFO_DATA, nil)
nl.NewRtAttrChild(data, nl.IFLA_MACVLAN_MODE, nl.Uint32Attr(macvlanModes[macv.Mode]))
}
}
req.AddData(linkInfo)
@ -483,6 +517,8 @@ func linkDeserialize(m []byte) (Link, error) {
link = &Vxlan{}
case "ipvlan":
link = &IPVlan{}
case "macvlan":
link = &Macvlan{}
default:
link = &Generic{LinkType: linkType}
}
@ -498,6 +534,8 @@ func linkDeserialize(m []byte) (Link, error) {
parseVxlanData(link, data)
case "ipvlan":
parseIPVlanData(link, data)
case "macvlan":
parseMacvlanData(link, data)
}
}
}
@ -520,7 +558,7 @@ func linkDeserialize(m []byte) (Link, error) {
case syscall.IFLA_MASTER:
base.MasterIndex = int(native.Uint32(attr.Value[0:4]))
case syscall.IFLA_TXQLEN:
base.TxQLen = native.Uint32(attr.Value[0:4])
base.TxQLen = int(native.Uint32(attr.Value[0:4]))
}
}
// Links that don't have IFLA_INFO_KIND are hardware devices
@ -547,8 +585,7 @@ func LinkList() ([]Link, error) {
return nil, err
}
res := make([]Link, 0)
var res []Link
for _, m := range msgs {
link, err := linkDeserialize(m)
if err != nil {
@ -593,7 +630,7 @@ func setProtinfoAttr(link Link, mode bool, attr int) error {
msg.Type = syscall.RTM_SETLINK
msg.Flags = syscall.NLM_F_REQUEST
msg.Index = int32(base.Index)
msg.Change = nl.DEFAULT_CHANGE
msg.Change = syscall.IFLA_PROTINFO | syscall.NLA_F_NESTED
req.AddData(msg)
br := nl.NewRtAttr(syscall.IFLA_PROTINFO|syscall.NLA_F_NESTED, nil)
@ -674,6 +711,27 @@ func parseIPVlanData(link Link, data []syscall.NetlinkRouteAttr) {
}
}
func parseMacvlanData(link Link, data []syscall.NetlinkRouteAttr) {
macv := link.(*Macvlan)
for _, datum := range data {
if datum.Attr.Type == nl.IFLA_MACVLAN_MODE {
switch native.Uint32(datum.Value[0:4]) {
case nl.MACVLAN_MODE_PRIVATE:
macv.Mode = MACVLAN_MODE_PRIVATE
case nl.MACVLAN_MODE_VEPA:
macv.Mode = MACVLAN_MODE_VEPA
case nl.MACVLAN_MODE_BRIDGE:
macv.Mode = MACVLAN_MODE_BRIDGE
case nl.MACVLAN_MODE_PASSTHRU:
macv.Mode = MACVLAN_MODE_PASSTHRU
case nl.MACVLAN_MODE_SOURCE:
macv.Mode = MACVLAN_MODE_SOURCE
}
return
}
}
}
// copied from pkg/net_linux.go
func linkFlags(rawFlags uint32) net.Flags {
var f net.Flags

View file

@ -8,7 +8,10 @@ import (
"github.com/vishvananda/netns"
)
const testTxQLen uint32 = 100
const (
testTxQLen int = 100
defaultTxQLen int = 1000
)
func testLinkAddDel(t *testing.T, link Link) {
links, err := LinkList()
@ -50,9 +53,9 @@ func testLinkAddDel(t *testing.T, link Link) {
}
}
if veth, ok := link.(*Veth); ok {
if veth.TxQLen != testTxQLen {
t.Fatalf("TxQLen is %d, should be %d", veth.TxQLen, testTxQLen)
if veth, ok := result.(*Veth); ok {
if rBase.TxQLen != base.TxQLen {
t.Fatalf("qlen is %d, should be %d", rBase.TxQLen, base.TxQLen)
}
if rBase.MTU != base.MTU {
t.Fatalf("MTU is %d, should be %d", rBase.MTU, base.MTU)
@ -91,6 +94,16 @@ func testLinkAddDel(t *testing.T, link Link) {
}
}
if macv, ok := link.(*Macvlan); ok {
other, ok := result.(*Macvlan)
if !ok {
t.Fatal("Result of create is not a macvlan")
}
if macv.Mode != other.Mode {
t.Fatalf("Got unexpected mode: %d, expected: %d", other.Mode, macv.Mode)
}
}
if err = LinkDel(link); err != nil {
t.Fatal(err)
}
@ -199,7 +212,10 @@ func TestLinkAddDelMacvlan(t *testing.T) {
t.Fatal(err)
}
testLinkAddDel(t, &Macvlan{LinkAttrs{Name: "bar", ParentIndex: parent.Attrs().Index}})
testLinkAddDel(t, &Macvlan{
LinkAttrs: LinkAttrs{Name: "bar", ParentIndex: parent.Attrs().Index},
Mode: MACVLAN_MODE_PRIVATE,
})
if err := LinkDel(parent); err != nil {
t.Fatal(err)
@ -213,6 +229,99 @@ func TestLinkAddDelVeth(t *testing.T) {
testLinkAddDel(t, &Veth{LinkAttrs{Name: "foo", TxQLen: testTxQLen, MTU: 1400}, "bar"})
}
func TestLinkAddVethWithDefaultTxQLen(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
la := NewLinkAttrs()
la.Name = "foo"
veth := &Veth{LinkAttrs: la, PeerName: "bar"}
if err := LinkAdd(veth); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if veth, ok := link.(*Veth); !ok {
t.Fatalf("unexpected link type: %T", link)
} else {
if veth.TxQLen != defaultTxQLen {
t.Fatalf("TxQLen is %d, should be %d", veth.TxQLen, defaultTxQLen)
}
}
peer, err := LinkByName("bar")
if err != nil {
t.Fatal(err)
}
if veth, ok := peer.(*Veth); !ok {
t.Fatalf("unexpected link type: %T", link)
} else {
if veth.TxQLen != defaultTxQLen {
t.Fatalf("TxQLen is %d, should be %d", veth.TxQLen, defaultTxQLen)
}
}
}
func TestLinkAddVethWithZeroTxQLen(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
la := NewLinkAttrs()
la.Name = "foo"
la.TxQLen = 0
veth := &Veth{LinkAttrs: la, PeerName: "bar"}
if err := LinkAdd(veth); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if veth, ok := link.(*Veth); !ok {
t.Fatalf("unexpected link type: %T", link)
} else {
if veth.TxQLen != 0 {
t.Fatalf("TxQLen is %d, should be %d", veth.TxQLen, 0)
}
}
peer, err := LinkByName("bar")
if err != nil {
t.Fatal(err)
}
if veth, ok := peer.(*Veth); !ok {
t.Fatalf("unexpected link type: %T", link)
} else {
if veth.TxQLen != 0 {
t.Fatalf("TxQLen is %d, should be %d", veth.TxQLen, 0)
}
}
}
func TestLinkAddDummyWithTxQLen(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()
la := NewLinkAttrs()
la.Name = "foo"
la.TxQLen = 1500
dummy := &Dummy{LinkAttrs: la}
if err := LinkAdd(dummy); err != nil {
t.Fatal(err)
}
link, err := LinkByName("foo")
if err != nil {
t.Fatal(err)
}
if dummy, ok := link.(*Dummy); !ok {
t.Fatalf("unexpected link type: %T", link)
} else {
if dummy.TxQLen != 1500 {
t.Fatalf("TxQLen is %d, should be %d", dummy.TxQLen, 1500)
}
}
}
func TestLinkAddDelBridgeMaster(t *testing.T) {
tearDown := setUpNetlinkTest(t)
defer tearDown()

View file

@ -141,7 +141,7 @@ func NeighList(linkIndex, family int) ([]Neigh, error) {
return nil, err
}
res := make([]Neigh, 0)
var res []Neigh
for _, m := range msgs {
ndm := deserializeNdmsg(m)
if linkIndex != 0 && int(ndm.Index) != linkIndex {

View file

@ -79,3 +79,18 @@ const (
// not defined in syscall
IFLA_NET_NS_FD = 28
)
const (
IFLA_MACVLAN_UNSPEC = iota
IFLA_MACVLAN_MODE
IFLA_MACVLAN_FLAGS
IFLA_MACVLAN_MAX = IFLA_MACVLAN_FLAGS
)
const (
MACVLAN_MODE_PRIVATE = 1
MACVLAN_MODE_VEPA = 2
MACVLAN_MODE_BRIDGE = 4
MACVLAN_MODE_PASSTHRU = 8
MACVLAN_MODE_SOURCE = 16
)

View file

@ -172,16 +172,16 @@ type NetlinkRequest struct {
}
// Serialize the Netlink Request into a byte array
func (msg *NetlinkRequest) Serialize() []byte {
func (req *NetlinkRequest) Serialize() []byte {
length := syscall.SizeofNlMsghdr
dataBytes := make([][]byte, len(msg.Data))
for i, data := range msg.Data {
dataBytes := make([][]byte, len(req.Data))
for i, data := range req.Data {
dataBytes[i] = data.Serialize()
length = length + len(dataBytes[i])
}
msg.Len = uint32(length)
req.Len = uint32(length)
b := make([]byte, length)
hdr := (*(*[syscall.SizeofNlMsghdr]byte)(unsafe.Pointer(msg)))[:]
hdr := (*(*[syscall.SizeofNlMsghdr]byte)(unsafe.Pointer(req)))[:]
next := syscall.SizeofNlMsghdr
copy(b[0:next], hdr)
for _, data := range dataBytes {
@ -193,9 +193,9 @@ func (msg *NetlinkRequest) Serialize() []byte {
return b
}
func (msg *NetlinkRequest) AddData(data NetlinkRequestData) {
func (req *NetlinkRequest) AddData(data NetlinkRequestData) {
if data != nil {
msg.Data = append(msg.Data, data)
req.Data = append(req.Data, data)
}
}
@ -218,11 +218,11 @@ func (req *NetlinkRequest) Execute(sockType int, resType uint16) ([][]byte, erro
return nil, err
}
res := make([][]byte, 0)
var res [][]byte
done:
for {
msgs, err := s.Recieve()
msgs, err := s.Receive()
if err != nil {
return nil, err
}
@ -294,7 +294,7 @@ func getNetlinkSocket(protocol int) (*NetlinkSocket, error) {
// Create a netlink socket with a given protocol (e.g. NETLINK_ROUTE)
// and subscribe it to multicast groups passed in variable argument list.
// Returns the netlink socket on whic hReceive() method can be called
// Returns the netlink socket on which Receive() method can be called
// to retrieve the messages from the kernel.
func Subscribe(protocol int, groups ...uint) (*NetlinkSocket, error) {
fd, err := syscall.Socket(syscall.AF_NETLINK, syscall.SOCK_RAW, protocol)
@ -329,7 +329,7 @@ func (s *NetlinkSocket) Send(request *NetlinkRequest) error {
return nil
}
func (s *NetlinkSocket) Recieve() ([]syscall.NetlinkMessage, error) {
func (s *NetlinkSocket) Receive() ([]syscall.NetlinkMessage, error) {
rb := make([]byte, syscall.Getpagesize())
nr, _, err := syscall.Recvfrom(s.fd, rb, 0)
if err != nil {

View file

@ -104,9 +104,8 @@ func (x *XfrmAddress) ToIPNet(prefixlen uint8) *net.IPNet {
ip := x.ToIP()
if GetIPFamily(ip) == FAMILY_V4 {
return &net.IPNet{IP: ip, Mask: net.CIDRMask(int(prefixlen), 32)}
} else {
return &net.IPNet{IP: ip, Mask: net.CIDRMask(int(prefixlen), 128)}
}
return &net.IPNet{IP: ip, Mask: net.CIDRMask(int(prefixlen), 128)}
}
func (x *XfrmAddress) FromIP(ip net.IP) {
@ -125,8 +124,8 @@ func DeserializeXfrmAddress(b []byte) *XfrmAddress {
return (*XfrmAddress)(unsafe.Pointer(&b[0:SizeofXfrmAddress][0]))
}
func (msg *XfrmAddress) Serialize() []byte {
return (*(*[SizeofXfrmAddress]byte)(unsafe.Pointer(msg)))[:]
func (x *XfrmAddress) Serialize() []byte {
return (*(*[SizeofXfrmAddress]byte)(unsafe.Pointer(x)))[:]
}
// struct xfrm_selector {

View file

@ -16,7 +16,7 @@ type Protinfo struct {
// String returns a list of enabled flags
func (prot *Protinfo) String() string {
boolStrings := make([]string, 0)
var boolStrings []string
if prot.Hairpin {
boolStrings = append(boolStrings, "Hairpin")
}

View file

@ -119,7 +119,7 @@ func RouteList(link Link, family int) ([]Route, error) {
}
native := nl.NativeEndian()
res := make([]Route, 0)
var res []Route
for _, m := range msgs {
msg := nl.DeserializeRtMsg(m)
@ -193,7 +193,7 @@ func RouteGet(destination net.IP) ([]Route, error) {
}
native := nl.NativeEndian()
res := make([]Route, 0)
var res []Route
for _, m := range msgs {
msg := nl.DeserializeRtMsg(m)
attrs, err := nl.ParseRouteAttr(m[msg.Len():])

View file

@ -84,7 +84,7 @@ func XfrmPolicyList(family int) ([]XfrmPolicy, error) {
return nil, err
}
res := make([]XfrmPolicy, 0)
var res []XfrmPolicy
for _, m := range msgs {
msg := nl.DeserializeXfrmUserpolicyInfo(m)

View file

@ -118,7 +118,7 @@ func XfrmStateList(family int) ([]XfrmState, error) {
return nil, err
}
res := make([]XfrmState, 0)
var res []XfrmState
for _, m := range msgs {
msg := nl.DeserializeXfrmUsersaInfo(m)

View file

@ -2,12 +2,14 @@ package bridge
import (
"errors"
"fmt"
"net"
"os/exec"
"strconv"
"sync"
"github.com/Sirupsen/logrus"
bri "github.com/docker/libcontainer/netlink"
"github.com/docker/libnetwork/driverapi"
"github.com/docker/libnetwork/ipallocator"
"github.com/docker/libnetwork/iptables"
@ -754,6 +756,20 @@ func (d *driver) DeleteNetwork(nid types.UUID) error {
return err
}
func addToBridge(ifaceName, bridgeName string) error {
iface, err := net.InterfaceByName(ifaceName)
if err != nil {
return fmt.Errorf("could not find interface %s: %v", ifaceName, err)
}
master, err := net.InterfaceByName(bridgeName)
if err != nil {
return fmt.Errorf("could not find bridge %s: %v", bridgeName, err)
}
return bri.AddToBridge(iface, master)
}
func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointInfo, epOptions map[string]interface{}) error {
var (
ipv6Addr *net.IPNet
@ -821,27 +837,27 @@ func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointIn
}()
// Generate a name for what will be the host side pipe interface
name1, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
hostIfName, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
if err != nil {
return err
}
// Generate a name for what will be the sandbox side pipe interface
name2, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
containerIfName, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
if err != nil {
return err
}
// Generate and add the interface pipe host <-> sandbox
veth := &netlink.Veth{
LinkAttrs: netlink.LinkAttrs{Name: name1, TxQLen: 0},
PeerName: name2}
LinkAttrs: netlink.LinkAttrs{Name: hostIfName, TxQLen: 0},
PeerName: containerIfName}
if err = netlink.LinkAdd(veth); err != nil {
return err
}
// Get the host side pipe interface handler
host, err := netlink.LinkByName(name1)
host, err := netlink.LinkByName(hostIfName)
if err != nil {
return err
}
@ -852,7 +868,7 @@ func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointIn
}()
// Get the sandbox side pipe interface handler
sbox, err := netlink.LinkByName(name2)
sbox, err := netlink.LinkByName(containerIfName)
if err != nil {
return err
}
@ -879,9 +895,8 @@ func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointIn
}
// Attach host side pipe interface into the bridge
if err = netlink.LinkSetMaster(host,
&netlink.Bridge{LinkAttrs: netlink.LinkAttrs{Name: config.BridgeName}}); err != nil {
return err
if err = addToBridge(hostIfName, config.BridgeName); err != nil {
return fmt.Errorf("adding interface %s to bridge %s failed: %v", hostIfName, config.BridgeName, err)
}
if !config.EnableUserlandProxy {
@ -898,14 +913,24 @@ func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointIn
}
ipv4Addr := &net.IPNet{IP: ip4, Mask: n.bridge.bridgeIPv4.Mask}
// Down the interface before configuring mac address.
if err := netlink.LinkSetDown(sbox); err != nil {
return fmt.Errorf("could not set link down for container interface %s: %v", containerIfName, err)
}
// Set the sbox's MAC. If specified, use the one configured by user, otherwise generate one based on IP.
mac := electMacAddress(epConfig, ip4)
err = netlink.LinkSetHardwareAddr(sbox, mac)
if err != nil {
return err
return fmt.Errorf("could not set mac address for container interface %s: %v", containerIfName, err)
}
endpoint.macAddress = mac
// Up the host interface after finishing all netlink configuration
if err := netlink.LinkSetUp(host); err != nil {
return fmt.Errorf("could not set link up for host interface %s: %v", hostIfName, err)
}
// v6 address for the sandbox side pipe interface
ipv6Addr = &net.IPNet{}
if config.EnableIPv6 {
@ -934,7 +959,7 @@ func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointIn
}
// Create the sandbox side pipe interface
endpoint.srcName = name2
endpoint.srcName = containerIfName
endpoint.addr = ipv4Addr
if config.EnableIPv6 {

View file

@ -1,15 +1,15 @@
package bridge
import (
log "github.com/Sirupsen/logrus"
"github.com/docker/docker/pkg/parsers/kernel"
"github.com/docker/libnetwork/netutils"
"github.com/docker/libnetwork/types"
bri "github.com/docker/libcontainer/netlink"
"github.com/vishvananda/netlink"
)
// SetupDevice create a new bridge interface/
func setupDevice(config *networkConfiguration, i *bridgeInterface) error {
var setMac bool
// We only attempt to create the bridge when the requested device name is
// the default one.
if config.BridgeName != DefaultBridgeName && !config.AllowNonDefaultBridge {
@ -27,15 +27,10 @@ func setupDevice(config *networkConfiguration, i *bridgeInterface) error {
// was not supported before that.
kv, err := kernel.GetKernelVersion()
if err == nil && (kv.Kernel >= 3 && kv.Major >= 3) {
i.Link.Attrs().HardwareAddr = netutils.GenerateRandomMAC()
log.Debugf("Setting bridge mac address to %s", i.Link.Attrs().HardwareAddr)
setMac = true
}
// Call out to netlink to create the device.
if err = netlink.LinkAdd(i.Link); err != nil {
return types.InternalErrorf("Failed to program bridge link: %s", err.Error())
}
return nil
return bri.CreateBridge(config.BridgeName, setMac)
}
// SetupDeviceUp ups the given bridge interface.

View file

@ -57,7 +57,11 @@ func (d *driver) EndpointOperInfo(nid, eid types.UUID) (map[string]interface{},
// Join method is invoked when a Sandbox is attached to an endpoint.
func (d *driver) Join(nid, eid types.UUID, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
return (jinfo.SetHostsPath("/etc/hosts"))
if err := jinfo.SetHostsPath("/etc/hosts"); err != nil {
return err
}
return jinfo.SetResolvConfPath("/etc/resolv.conf")
}
// Leave method is invoked when a Sandbox detaches from an endpoint.

View file

@ -155,7 +155,7 @@ func (n *network) initSandbox() error {
func (n *network) watchMiss(nlSock *nl.NetlinkSocket) {
for {
msgs, err := nlSock.Recieve()
msgs, err := nlSock.Receive()
if err != nil {
logrus.Errorf("Failed to receive from netlink: %v ", err)
continue

View file

@ -811,9 +811,19 @@ func (ep *endpoint) updateDNS(resolvConf []byte) error {
return os.Rename(tmpResolvFile.Name(), container.config.resolvConfPath)
}
func copyFile(src, dst string) error {
sBytes, err := ioutil.ReadFile(src)
if err != nil {
return err
}
return ioutil.WriteFile(dst, sBytes, 0644)
}
func (ep *endpoint) setupDNS() error {
ep.Lock()
container := ep.container
joinInfo := ep.joinInfo
ep.Unlock()
if container == nil {
@ -830,6 +840,14 @@ func (ep *endpoint) setupDNS() error {
return err
}
if joinInfo.resolvConfPath != "" {
if err := copyFile(joinInfo.resolvConfPath, container.config.resolvConfPath); err != nil {
return fmt.Errorf("could not copy source resolv.conf file %s to %s: %v", joinInfo.resolvConfPath, container.config.resolvConfPath, err)
}
return nil
}
resolvConf, err := resolvconf.Get()
if err != nil {
return err

View file

@ -1564,6 +1564,74 @@ func TestEnableIPv6(t *testing.T) {
}
}
func TestResolvConfHost(t *testing.T) {
if !netutils.IsRunningInContainer() {
defer netutils.SetupTestNetNS(t)()
}
tmpResolvConf := []byte("search localhost.net\nnameserver 127.0.0.1\nnameserver 2001:4860:4860::8888")
//take a copy of resolv.conf for restoring after test completes
resolvConfSystem, err := ioutil.ReadFile("/etc/resolv.conf")
if err != nil {
t.Fatal(err)
}
//cleanup
defer func() {
if err := ioutil.WriteFile("/etc/resolv.conf", resolvConfSystem, 0644); err != nil {
t.Fatal(err)
}
}()
n, err := controller.NetworkByName("testhost")
if err != nil {
t.Fatal(err)
}
ep1, err := n.CreateEndpoint("ep1", nil)
if err != nil {
t.Fatal(err)
}
if err := ioutil.WriteFile("/etc/resolv.conf", tmpResolvConf, 0644); err != nil {
t.Fatal(err)
}
resolvConfPath := "/tmp/libnetwork_test/resolv.conf"
defer os.Remove(resolvConfPath)
err = ep1.Join(containerID,
libnetwork.JoinOptionResolvConfPath(resolvConfPath))
if err != nil {
t.Fatal(err)
}
defer func() {
err = ep1.Leave(containerID)
if err != nil {
t.Fatal(err)
}
}()
finfo, err := os.Stat(resolvConfPath)
if err != nil {
t.Fatal(err)
}
fmode := (os.FileMode)(0644)
if finfo.Mode() != fmode {
t.Fatalf("Expected file mode %s, got %s", fmode.String(), finfo.Mode().String())
}
content, err := ioutil.ReadFile(resolvConfPath)
if err != nil {
t.Fatal(err)
}
if !bytes.Equal(content, tmpResolvConf) {
t.Fatalf("Expected %s, Got %s", string(tmpResolvConf), string(content))
}
}
func TestResolvConf(t *testing.T) {
if !netutils.IsRunningInContainer() {
defer netutils.SetupTestNetNS(t)()