// Create creates a bridge device and returns the interface.
// If the device already exists, returns the existing interface.
func (Bridge) Create(name string, ip net.IP, subnet *net.IPNet) (intf *net.Interface, err error) {
netlinkMu.Lock()
defer netlinkMu.Unlock()
if intf, _ := net.InterfaceByName(name); intf != nil {
return intf, nil
}
link := &netlink.Bridge{LinkAttrs: netlink.LinkAttrs{Name: name}}
if err := netlink.LinkAdd(link); err != nil && err.Error() != "file exists" {
return nil, fmt.Errorf("devices: create bridge: %v", err)
}
hAddr, _ := net.ParseMAC(randMacAddr())
err = netlink.LinkSetHardwareAddr(link, hAddr)
if err != nil {
return nil, fmt.Errorf("devices: set hardware address: %v", err)
}
if intf, err = net.InterfaceByName(name); err != nil {
return nil, fmt.Errorf("devices: look up created bridge interface: %v", err)
}
addr := &netlink.Addr{IPNet: &net.IPNet{IP: ip, Mask: subnet.Mask}}
if err = netlink.AddrAdd(link, addr); err != nil && err.Error() != "file exists" {
return nil, fmt.Errorf("devices: add IP to bridge: %v", err)
}
return intf, nil
}
func SetHWAddrByIP(ifName string, ip4 net.IP, ip6 net.IP) error {
iface, err := netlink.LinkByName(ifName)
if err != nil {
return fmt.Errorf("failed to lookup %q: %v", ifName, err)
}
switch {
case ip4 == nil && ip6 == nil:
return fmt.Errorf("neither ip4 or ip6 specified")
case ip4 != nil:
{
hwAddr, err := hwaddr.GenerateHardwareAddr4(ip4, hwaddr.PrivateMACPrefix)
if err != nil {
return fmt.Errorf("failed to generate hardware addr: %v", err)
}
if err = netlink.LinkSetHardwareAddr(iface, hwAddr); err != nil {
return fmt.Errorf("failed to add hardware addr to %q: %v", ifName, err)
}
}
case ip6 != nil:
// TODO: IPv6
}
return nil
}
// SetInterfaceMac : Set mac address of an interface
func SetInterfaceMac(name string, macaddr string) error {
iface, err := netlink.LinkByName(name)
if err != nil {
return err
}
hwaddr, err := net.ParseMAC(macaddr)
if err != nil {
return err
}
return netlink.LinkSetHardwareAddr(iface, hwaddr)
}
func SetVethMac(vethNameHost, mac string) error {
addr, err := net.ParseMAC(mac)
if err != nil {
return errors.Wrap(err, "Veth setting error")
}
return netlink.LinkSetHardwareAddr(&netlink.Veth{
LinkAttrs: netlink.LinkAttrs{
Name: vethNameHost,
},
}, addr)
}
// Wire up a tap interface for communicating with the guest. Returns the name
// of the created tap interface.
func wireTapInterface(config *netConfig) string {
// Drop link on eth0 before configuring anything
eth0, err := netlink.LinkByName("eth0")
if err != nil {
log.Fatalf("LinkByName(eth0): %v", err)
}
if err := netlink.LinkSetDown(eth0); err != nil {
log.Fatalf("LinkSetDown(eth0): %v", err)
}
// Flush any L3 addresses on eth0
if err := flushAddresses(eth0); err != nil {
log.Fatalf("flushAddresses(eth0): %v", err)
}
// Generate and set random MAC address for eth0
eth0Addr := generateHardwareAddr()
if err := netlink.LinkSetHardwareAddr(eth0, eth0Addr); err != nil {
log.Fatalf("LinkSetHardwareAddr(eth0): %v", err)
}
// Create "tap0" (interface to guest)
tap0Attrs := netlink.NewLinkAttrs()
tap0Attrs.Name = "tap0"
tap0 := &netlink.Tuntap{tap0Attrs, netlink.TUNTAP_MODE_TAP}
if err := netlink.LinkAdd(tap0); err != nil {
log.Fatalf("LinkAdd(tap0): %v", err)
}
// Create a new bridge, br0 and add eth0 and tap0 to it
br0Attrs := netlink.NewLinkAttrs()
br0Attrs.Name = "br0"
br0 := &netlink.Bridge{br0Attrs}
if err := netlink.LinkAdd(br0); err != nil {
log.Fatalf("LinkAdd(br0): %v", err)
}
if err := netlink.LinkSetMaster(eth0, br0); err != nil {
log.Fatalf("LinkSetMaster(eth0, br0): %v", err)
}
if err := netlink.LinkSetMaster(tap0, br0); err != nil {
log.Fatalf("LinkSetMaster(tap0, br0): %v", err)
}
// Set all links up
if err := netlink.LinkSetUp(tap0); err != nil {
log.Fatalf("LinkSetUp(tap0): %v", err)
}
if err := netlink.LinkSetUp(eth0); err != nil {
log.Fatalf("LinkSetUp(eth0): %v", err)
}
if err := netlink.LinkSetUp(br0); err != nil {
log.Fatalf("LinkSetUp(br0): %v", err)
}
return tap0Attrs.Name
}
// 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 {
return NonDefaultBridgeExistError(config.BridgeName)
}
// Set the bridgeInterface netlink.Bridge.
i.Link = &netlink.Bridge{
LinkAttrs: netlink.LinkAttrs{
Name: config.BridgeName,
},
}
// Only set the bridge's MAC address if the kernel version is > 3.3, as it
// was not supported before that.
kv, err := kernel.GetKernelVersion()
if err != nil {
logrus.Errorf("Failed to check kernel versions: %v. Will not assign a MAC address to the bridge interface", err)
} else {
setMac = kv.Kernel > 3 || (kv.Kernel == 3 && kv.Major >= 3)
}
if err = netlink.LinkAdd(i.Link); err != nil {
logrus.Debugf("Failed to create bridge %s via netlink. Trying ioctl", config.BridgeName)
return ioctlCreateBridge(config.BridgeName, setMac)
}
if setMac {
hwAddr := netutils.GenerateRandomMAC()
if err = netlink.LinkSetHardwareAddr(i.Link, hwAddr); err != nil {
return fmt.Errorf("failed to set bridge mac-address %s : %s", hwAddr, err.Error())
}
logrus.Debugf("Setting bridge mac address to %s", hwAddr)
logrus.Debugf("call recieved to bridge driver, PLUMgrid")
}
return err
}
// Join method is invoked when a Sandbox is attached to an endpoint.
func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
if err := validateID(nid, eid); err != nil {
return err
}
n := d.network(nid)
if n == nil {
return fmt.Errorf("could not find network with id %s", nid)
}
ep := n.endpoint(eid)
if ep == nil {
return fmt.Errorf("could not find endpoint with id %s", eid)
}
s := n.getSubnetforIP(ep.addr)
if s == nil {
return fmt.Errorf("could not find subnet for endpoint %s", eid)
}
if err := n.obtainVxlanID(s); err != nil {
return fmt.Errorf("couldn't get vxlan id for %q: %v", s.subnetIP.String(), err)
}
if err := n.joinSandbox(); err != nil {
return fmt.Errorf("network sandbox join failed: %v", err)
}
if err := n.joinSubnetSandbox(s); err != nil {
return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), err)
}
// joinSubnetSandbox gets called when an endpoint comes up on a new subnet in the
// overlay network. Hence the Endpoint count should be updated outside joinSubnetSandbox
n.incEndpointCount()
sbox := n.sandbox()
name1, name2, err := createVethPair()
if err != nil {
return err
}
// Set the container interface and its peer MTU to 1450 to allow
// for 50 bytes vxlan encap (inner eth header(14) + outer IP(20) +
// outer UDP(8) + vxlan header(8))
veth, err := netlink.LinkByName(name1)
if err != nil {
return fmt.Errorf("cound not find link by name %s: %v", name1, err)
}
err = netlink.LinkSetMTU(veth, vxlanVethMTU)
if err != nil {
return err
}
if err := sbox.AddInterface(name1, "veth",
sbox.InterfaceOptions().Master(s.brName)); err != nil {
return fmt.Errorf("could not add veth pair inside the network sandbox: %v", err)
}
veth, err = netlink.LinkByName(name2)
if err != nil {
return fmt.Errorf("could not find link by name %s: %v", name2, err)
}
err = netlink.LinkSetMTU(veth, vxlanVethMTU)
if err != nil {
return err
}
if err := netlink.LinkSetHardwareAddr(veth, ep.mac); err != nil {
return fmt.Errorf("could not set mac address (%v) to the container interface: %v", ep.mac, err)
}
for _, sub := range n.subnets {
if sub == s {
continue
}
if err := jinfo.AddStaticRoute(sub.subnetIP, types.NEXTHOP, s.gwIP.IP); err != nil {
log.Errorf("Adding subnet %s static route in network %q failed\n", s.subnetIP, n.id)
}
}
if iNames := jinfo.InterfaceName(); iNames != nil {
err = iNames.SetNames(name2, "eth")
if err != nil {
return err
}
}
d.peerDbAdd(nid, eid, ep.addr.IP, ep.addr.Mask, ep.mac,
net.ParseIP(d.bindAddress), true)
d.pushLocalEndpointEvent("join", nid, eid)
return nil
}
// 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 {
if err := validateID(nid, eid); err != nil {
return err
}
n := d.network(nid)
if n == nil {
return fmt.Errorf("could not find network with id %s", nid)
}
ep := n.endpoint(eid)
if ep == nil {
return fmt.Errorf("could not find endpoint with id %s", eid)
}
if err := n.joinSandbox(); err != nil {
return fmt.Errorf("network sandbox join failed: %v",
err)
}
sbox := n.sandbox()
name1, name2, err := createVethPair()
if err != nil {
return err
}
if err := sbox.AddInterface(name1, "veth",
sbox.InterfaceOptions().Master("bridge1")); err != nil {
return fmt.Errorf("could not add veth pair inside the network sandbox: %v", err)
}
veth, err := netlink.LinkByName(name2)
if err != nil {
return fmt.Errorf("could not find link by name %s: %v", name2, err)
}
if err := netlink.LinkSetHardwareAddr(veth, ep.mac); err != nil {
return fmt.Errorf("could not set mac address to the container interface: %v", err)
}
for _, iNames := range jinfo.InterfaceNames() {
// Make sure to set names on the correct interface ID.
if iNames.ID() == 1 {
err = iNames.SetNames(name2, "eth")
if err != nil {
return err
}
}
}
err = jinfo.SetGateway(bridgeIP.IP)
if err != nil {
return err
}
d.peerDbAdd(nid, eid, ep.addr.IP, ep.mac,
d.serfInstance.LocalMember().Addr, true)
d.notifyCh <- ovNotify{
action: "join",
nid: nid,
eid: eid,
}
return nil
}
func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointInfo, epOptions map[string]interface{}) error {
var (
ipv6Addr *net.IPNet
err error
)
if epInfo == nil {
return errors.New("invalid endpoint info passed")
}
if len(epInfo.Interfaces()) != 0 {
return errors.New("non empty interface list passed to bridge(local) driver")
}
// Get the network handler and make sure it exists
d.Lock()
n := d.network
config := n.config
d.Unlock()
if n == nil {
return driverapi.ErrNoNetwork(nid)
}
// Sanity check
n.Lock()
if n.id != nid {
n.Unlock()
return InvalidNetworkIDError(nid)
}
n.Unlock()
// Check if endpoint id is good and retrieve correspondent endpoint
ep, err := n.getEndpoint(eid)
if err != nil {
return err
}
// Endpoint with that id exists either on desired or other sandbox
if ep != nil {
return driverapi.ErrEndpointExists(eid)
}
// Try to convert the options to endpoint configuration
epConfig, err := parseEndpointOptions(epOptions)
if err != nil {
return err
}
// Create and add the endpoint
n.Lock()
endpoint := &bridgeEndpoint{id: eid, config: epConfig}
n.endpoints[eid] = endpoint
n.Unlock()
// On failure make sure to remove the endpoint
defer func() {
if err != nil {
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
}
}()
// Generate a name for what will be the host side pipe interface
name1, err := generateIfaceName()
if err != nil {
return err
}
// Generate a name for what will be the sandbox side pipe interface
name2, err := generateIfaceName()
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}
if err = netlink.LinkAdd(veth); err != nil {
return err
}
// Get the host side pipe interface handler
host, err := netlink.LinkByName(name1)
if err != nil {
return err
}
defer func() {
if err != nil {
netlink.LinkDel(host)
}
}()
// Get the sandbox side pipe interface handler
sbox, err := netlink.LinkByName(name2)
if err != nil {
return err
}
defer func() {
if err != nil {
netlink.LinkDel(sbox)
}
}()
// Add bridge inherited attributes to pipe interfaces
if config.Mtu != 0 {
err = netlink.LinkSetMTU(host, config.Mtu)
if err != nil {
return err
}
err = netlink.LinkSetMTU(sbox, config.Mtu)
if err != nil {
return err
}
}
// 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 !config.EnableUserlandProxy {
err = netlink.LinkSetHairpin(host, true)
if err != nil {
return err
}
}
// v4 address for the sandbox side pipe interface
ip4, err := ipAllocator.RequestIP(n.bridge.bridgeIPv4, nil)
if err != nil {
return err
}
ipv4Addr := &net.IPNet{IP: ip4, Mask: n.bridge.bridgeIPv4.Mask}
// 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
}
endpoint.macAddress = mac
// v6 address for the sandbox side pipe interface
ipv6Addr = &net.IPNet{}
if config.EnableIPv6 {
var ip6 net.IP
network := n.bridge.bridgeIPv6
if config.FixedCIDRv6 != nil {
network = config.FixedCIDRv6
}
ones, _ := network.Mask.Size()
if ones <= 80 {
ip6 = make(net.IP, len(network.IP))
copy(ip6, network.IP)
for i, h := range mac {
ip6[i+10] = h
}
}
ip6, err := ipAllocator.RequestIP(network, ip6)
if err != nil {
return err
}
ipv6Addr = &net.IPNet{IP: ip6, Mask: network.Mask}
}
// Create the sandbox side pipe interface
intf := &sandbox.Interface{}
intf.SrcName = name2
intf.DstName = containerVethPrefix
intf.Address = ipv4Addr
if config.EnableIPv6 {
intf.AddressIPv6 = ipv6Addr
}
// Store the interface in endpoint, this is needed for cleanup on DeleteEndpoint()
endpoint.intf = intf
err = epInfo.AddInterface(ifaceID, endpoint.macAddress, *ipv4Addr, *ipv6Addr)
if err != nil {
return err
}
// Program any required port mapping and store them in the endpoint
endpoint.portMapping, err = allocatePorts(epConfig, intf, config.DefaultBindingIP, config.EnableUserlandProxy)
if err != nil {
return err
}
return nil
}
func (d *driver) CreateEndpoint(nid, eid string, ifInfo driverapi.InterfaceInfo, epOptions map[string]interface{}) error {
defer osl.InitOSContext()()
if ifInfo == nil {
return errors.New("invalid interface info passed")
}
// Get the network handler and make sure it exists
d.Lock()
n, ok := d.networks[nid]
dconfig := d.config
d.Unlock()
if !ok {
return types.NotFoundErrorf("network %s does not exist", nid)
}
if n == nil {
return driverapi.ErrNoNetwork(nid)
}
// Sanity check
n.Lock()
if n.id != nid {
n.Unlock()
return InvalidNetworkIDError(nid)
}
n.Unlock()
// Check if endpoint id is good and retrieve correspondent endpoint
ep, err := n.getEndpoint(eid)
if err != nil {
return err
}
// Endpoint with that id exists either on desired or other sandbox
if ep != nil {
return driverapi.ErrEndpointExists(eid)
}
// Try to convert the options to endpoint configuration
epConfig, err := parseEndpointOptions(epOptions)
if err != nil {
return err
}
// Create and add the endpoint
n.Lock()
endpoint := &bridgeEndpoint{id: eid, config: epConfig}
n.endpoints[eid] = endpoint
n.Unlock()
// On failure make sure to remove the endpoint
defer func() {
if err != nil {
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
}
}()
// Generate a name for what will be the host side pipe interface
hostIfName, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
if err != nil {
return err
}
// Generate a name for what will be the sandbox side pipe interface
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: hostIfName, TxQLen: 0},
PeerName: containerIfName}
if err = netlink.LinkAdd(veth); err != nil {
return types.InternalErrorf("failed to add the host (%s) <=> sandbox (%s) pair interfaces: %v", hostIfName, containerIfName, err)
}
// Get the host side pipe interface handler
host, err := netlink.LinkByName(hostIfName)
if err != nil {
return types.InternalErrorf("failed to find host side interface %s: %v", hostIfName, err)
}
defer func() {
if err != nil {
netlink.LinkDel(host)
}
}()
// Get the sandbox side pipe interface handler
sbox, err := netlink.LinkByName(containerIfName)
if err != nil {
return types.InternalErrorf("failed to find sandbox side interface %s: %v", containerIfName, err)
}
defer func() {
if err != nil {
netlink.LinkDel(sbox)
}
}()
n.Lock()
config := n.config
n.Unlock()
// Add bridge inherited attributes to pipe interfaces
if config.Mtu != 0 {
err = netlink.LinkSetMTU(host, config.Mtu)
if err != nil {
return types.InternalErrorf("failed to set MTU on host interface %s: %v", hostIfName, err)
}
err = netlink.LinkSetMTU(sbox, config.Mtu)
if err != nil {
return types.InternalErrorf("failed to set MTU on sandbox interface %s: %v", containerIfName, err)
}
}
// Attach host side pipe interface into the bridge
if err = addToBridge(hostIfName, config.BridgeName); err != nil {
return fmt.Errorf("adding interface %s to bridge %s failed: %v", hostIfName, config.BridgeName, err)
}
if !dconfig.EnableUserlandProxy {
err = setHairpinMode(host, true)
if err != nil {
return err
}
}
// Create the sandbox side pipe interface
endpoint.srcName = containerIfName
endpoint.macAddress = ifInfo.MacAddress()
endpoint.addr = ifInfo.Address()
endpoint.addrv6 = ifInfo.AddressIPv6()
// 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.
if endpoint.macAddress == nil {
endpoint.macAddress = electMacAddress(epConfig, endpoint.addr.IP)
if err := ifInfo.SetMacAddress(endpoint.macAddress); err != nil {
return err
}
}
err = netlink.LinkSetHardwareAddr(sbox, endpoint.macAddress)
if err != nil {
return fmt.Errorf("could not set mac address for container interface %s: %v", containerIfName, err)
}
// 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)
}
if endpoint.addrv6 == nil && config.EnableIPv6 {
var ip6 net.IP
network := n.bridge.bridgeIPv6
if config.AddressIPv6 != nil {
network = config.AddressIPv6
}
ones, _ := network.Mask.Size()
if ones > 80 {
err = types.ForbiddenErrorf("Cannot self generate an IPv6 address on network %v: At least 48 host bits are needed.", network)
return err
}
ip6 = make(net.IP, len(network.IP))
copy(ip6, network.IP)
for i, h := range endpoint.macAddress {
ip6[i+10] = h
}
endpoint.addrv6 = &net.IPNet{IP: ip6, Mask: network.Mask}
if err := ifInfo.SetIPAddress(endpoint.addrv6); err != nil {
return err
}
}
// Program any required port mapping and store them in the endpoint
endpoint.portMapping, err = n.allocatePorts(epConfig, endpoint, config.DefaultBindingIP, d.config.EnableUserlandProxy)
if err != nil {
return err
}
return nil
}
func (d *Driver) createVxLan(vxlanName string, net *dockertypes.NetworkResource) (*netlink.Vxlan, error) {
vxlan := &netlink.Vxlan{
LinkAttrs: netlink.LinkAttrs{
Name: vxlanName,
},
}
// Parse interface options
for k, v := range net.Options {
if k == "vxlanMTU" {
MTU, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting MTU to int: %v", err)
return nil, err
}
vxlan.LinkAttrs.MTU = MTU
}
if k == "vxlanHardwareAddr" {
HardwareAddr, err := gonet.ParseMAC(v)
if err != nil {
log.Errorf("Error parsing mac: %v", err)
return nil, err
}
vxlan.LinkAttrs.HardwareAddr = HardwareAddr
}
if k == "vxlanTxQLen" {
TxQLen, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting TxQLen to int: %v", err)
return nil, err
}
vxlan.LinkAttrs.TxQLen = TxQLen
}
if k == "VxlanId" {
log.Debugf("VxlanID: %+v", v)
VxlanID, err := strconv.ParseInt(v, 0, 32)
if err != nil {
log.Errorf("Error converting VxlanId to int: %v", err)
return nil, err
}
log.Debugf("VxlanID: %+v", VxlanID)
log.Debugf("int(VxlanID): %+v", int(VxlanID))
vxlan.VxlanId = int(VxlanID)
}
if k == "VtepDev" {
vtepDev, err := netlink.LinkByName(v)
if err != nil {
log.Errorf("Error getting VtepDev interface: %v", err)
return nil, err
}
vxlan.VtepDevIndex = vtepDev.Attrs().Index
}
if k == "SrcAddr" {
vxlan.SrcAddr = gonet.ParseIP(v)
}
if k == "Group" {
vxlan.Group = gonet.ParseIP(v)
}
if k == "TTL" {
TTL, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting TTL to int: %v", err)
return nil, err
}
vxlan.TTL = TTL
}
if k == "TOS" {
TOS, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting TOS to int: %v", err)
return nil, err
}
vxlan.TOS = TOS
}
if k == "Learning" {
Learning, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting Learning to bool: %v", err)
return nil, err
}
vxlan.Learning = Learning
}
if k == "Proxy" {
Proxy, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting Proxy to bool: %v", err)
return nil, err
}
vxlan.Proxy = Proxy
}
if k == "RSC" {
RSC, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting RSC to bool: %v", err)
return nil, err
}
vxlan.RSC = RSC
}
if k == "L2miss" {
L2miss, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting L2miss to bool: %v", err)
return nil, err
}
vxlan.L2miss = L2miss
}
if k == "L3miss" {
L3miss, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting L3miss to bool: %v", err)
return nil, err
}
vxlan.L3miss = L3miss
}
if k == "NoAge" {
NoAge, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting NoAge to bool: %v", err)
return nil, err
}
vxlan.NoAge = NoAge
}
if k == "GBP" {
GBP, err := strconv.ParseBool(v)
if err != nil {
log.Errorf("Error converting GBP to bool: %v", err)
return nil, err
}
vxlan.GBP = GBP
}
if k == "Age" {
Age, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting Age to int: %v", err)
return nil, err
}
vxlan.Age = Age
}
if k == "Limit" {
Limit, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting Limit to int: %v", err)
return nil, err
}
vxlan.Limit = Limit
}
if k == "Port" {
Port, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting Port to int: %v", err)
return nil, err
}
vxlan.Port = Port
}
if k == "PortLow" {
PortLow, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting PortLow to int: %v", err)
return nil, err
}
vxlan.PortLow = PortLow
}
if k == "PortHigh" {
PortHigh, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting PortHigh to int: %v", err)
return nil, err
}
vxlan.PortHigh = PortHigh
}
}
if d.vtepdev != "" {
vtepDev, err := netlink.LinkByName(d.vtepdev)
if err != nil {
log.Errorf("Error getting vtepdev interface: %v", err)
return nil, err
}
vxlan.VtepDevIndex = vtepDev.Attrs().Index
}
err := netlink.LinkAdd(vxlan)
if err != nil {
log.Errorf("Error adding vxlan interface: %v", err)
return nil, err
}
// Parse interface options
for k, v := range net.Options {
if k == "vxlanHardwareAddr" {
hardwareAddr, err := gonet.ParseMAC(v)
if err != nil {
log.Errorf("Error parsing mac address: %v", err)
return nil, err
}
err = netlink.LinkSetHardwareAddr(vxlan, hardwareAddr)
if err != nil {
log.Errorf("Error setting mac address: %v", err)
return nil, err
}
}
if k == "vxlanMTU" {
mtu, err := strconv.Atoi(v)
if err != nil {
log.Errorf("Error converting MTU to int: %v", err)
return nil, err
}
err = netlink.LinkSetMTU(vxlan, mtu)
if err != nil {
log.Errorf("Error setting MTU: %v", err)
return nil, err
}
}
}
// bring interfaces up
err = netlink.LinkSetUp(vxlan)
if err != nil {
log.Errorf("Error bringing up vxlan: %v", err)
return nil, err
}
return vxlan, nil
}
func setInterfaceMAC(iface netlink.Link, i *nwIface) error {
if i.MacAddress() == nil {
return nil
}
return netlink.LinkSetHardwareAddr(iface, i.MacAddress())
}
func (v *veth) initialize(config *network) error {
peer := config.TempVethPeerName
if peer == "" {
return fmt.Errorf("peer is not specified")
}
child, err := netlink.LinkByName(peer)
if err != nil {
return err
}
if err := netlink.LinkSetDown(child); err != nil {
return err
}
if err := netlink.LinkSetName(child, config.Name); err != nil {
return err
}
// get the interface again after we changed the name as the index also changes.
if child, err = netlink.LinkByName(config.Name); err != nil {
return err
}
if config.MacAddress != "" {
mac, err := net.ParseMAC(config.MacAddress)
if err != nil {
return err
}
if err := netlink.LinkSetHardwareAddr(child, mac); err != nil {
return err
}
}
ip, err := netlink.ParseAddr(config.Address)
if err != nil {
return err
}
if err := netlink.AddrAdd(child, ip); err != nil {
return err
}
if config.IPv6Address != "" {
ip6, err := netlink.ParseAddr(config.IPv6Address)
if err != nil {
return err
}
if err := netlink.AddrAdd(child, ip6); err != nil {
return err
}
}
if err := netlink.LinkSetMTU(child, config.Mtu); err != nil {
return err
}
if err := netlink.LinkSetUp(child); err != nil {
return err
}
if config.Gateway != "" {
gw := net.ParseIP(config.Gateway)
if err := netlink.RouteAdd(&netlink.Route{
Scope: netlink.SCOPE_UNIVERSE,
LinkIndex: child.Attrs().Index,
Gw: gw,
}); err != nil {
return err
}
}
if config.IPv6Gateway != "" {
gw := net.ParseIP(config.IPv6Gateway)
if err := netlink.RouteAdd(&netlink.Route{
Scope: netlink.SCOPE_UNIVERSE,
LinkIndex: child.Attrs().Index,
Gw: gw,
}); err != nil {
return err
}
}
return nil
}
// setup sets up networking through CNI using the given ns/name and sandbox ID.
// TODO: Don't pass the pod to this method, it only needs it for bandwidth
// shaping and hostport management.
func (plugin *kubenetNetworkPlugin) setup(namespace string, name string, id kubecontainer.ContainerID, pod *v1.Pod) error {
// Bring up container loopback interface
if _, err := plugin.addContainerToNetwork(plugin.loConfig, "lo", namespace, name, id); err != nil {
return err
}
// Hook container up with our bridge
res, err := plugin.addContainerToNetwork(plugin.netConfig, network.DefaultInterfaceName, namespace, name, id)
if err != nil {
return err
}
if res.IP4 == nil {
return fmt.Errorf("CNI plugin reported no IPv4 address for container %v.", id)
}
ip4 := res.IP4.IP.IP.To4()
if ip4 == nil {
return fmt.Errorf("CNI plugin reported an invalid IPv4 address for container %v: %+v.", id, res.IP4)
}
// Explicitly assign mac address to cbr0. If bridge mac address is not explicitly set will adopt the lowest MAC address of the attached veths.
// TODO: Remove this once upstream cni bridge plugin handles this
link, err := netlink.LinkByName(BridgeName)
if err != nil {
return fmt.Errorf("failed to lookup %q: %v", BridgeName, err)
}
macAddr, err := generateHardwareAddr(plugin.gateway)
if err != nil {
return err
}
glog.V(3).Infof("Configure %q mac address to %v", BridgeName, macAddr)
err = netlink.LinkSetHardwareAddr(link, macAddr)
if err != nil {
return fmt.Errorf("Failed to configure %q mac address to %q: %v", BridgeName, macAddr, err)
}
// Put the container bridge into promiscuous mode to force it to accept hairpin packets.
// TODO: Remove this once the kernel bug (#20096) is fixed.
// TODO: check and set promiscuous mode with netlink once vishvananda/netlink supports it
if plugin.hairpinMode == componentconfig.PromiscuousBridge {
output, err := plugin.execer.Command("ip", "link", "show", "dev", BridgeName).CombinedOutput()
if err != nil || strings.Index(string(output), "PROMISC") < 0 {
_, err := plugin.execer.Command("ip", "link", "set", BridgeName, "promisc", "on").CombinedOutput()
if err != nil {
return fmt.Errorf("Error setting promiscuous mode on %s: %v", BridgeName, err)
}
}
// configure the ebtables rules to eliminate duplicate packets by best effort
plugin.syncEbtablesDedupRules(macAddr)
}
plugin.podIPs[id] = ip4.String()
// The host can choose to not support "legacy" features. The remote
// shim doesn't support it (#35457), but the kubelet does.
if !plugin.host.SupportsLegacyFeatures() {
return nil
}
// The first SetUpPod call creates the bridge; get a shaper for the sake of
// initialization
shaper := plugin.shaper()
ingress, egress, err := bandwidth.ExtractPodBandwidthResources(pod.Annotations)
if err != nil {
return fmt.Errorf("Error reading pod bandwidth annotations: %v", err)
}
if egress != nil || ingress != nil {
if err := shaper.ReconcileCIDR(fmt.Sprintf("%s/32", ip4.String()), egress, ingress); err != nil {
return fmt.Errorf("Failed to add pod to shaper: %v", err)
}
}
// Open any hostports the pod's containers want
activePods, err := plugin.getActivePods()
if err != nil {
return err
}
newPod := &hostport.ActivePod{Pod: pod, IP: ip4}
if err := plugin.hostportHandler.OpenPodHostportsAndSync(newPod, BridgeName, activePods); err != nil {
return err
}
return nil
}
// Join method is invoked when a Sandbox is attached to an endpoint.
func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
if err := validateID(nid, eid); err != nil {
return err
}
n := d.network(nid)
if n == nil {
return fmt.Errorf("could not find network with id %s", nid)
}
ep := n.endpoint(eid)
if ep == nil {
return fmt.Errorf("could not find endpoint with id %s", eid)
}
if err := n.joinSandbox(); err != nil {
return fmt.Errorf("network sandbox join failed: %v",
err)
}
sbox := n.sandbox()
name1, name2, err := createVethPair()
if err != nil {
return err
}
// Set the container interface and its peer MTU to 1450 to allow
// for 50 bytes vxlan encap (inner eth header(14) + outer IP(20) +
// outer UDP(8) + vxlan header(8))
veth, err := netlink.LinkByName(name1)
if err != nil {
return fmt.Errorf("cound not find link by name %s: %v", name1, err)
}
err = netlink.LinkSetMTU(veth, vxlanVethMTU)
if err != nil {
return err
}
if err := sbox.AddInterface(name1, "veth",
sbox.InterfaceOptions().Master("bridge1")); err != nil {
return fmt.Errorf("could not add veth pair inside the network sandbox: %v", err)
}
veth, err = netlink.LinkByName(name2)
if err != nil {
return fmt.Errorf("could not find link by name %s: %v", name2, err)
}
err = netlink.LinkSetMTU(veth, vxlanVethMTU)
if err != nil {
return err
}
if err := netlink.LinkSetHardwareAddr(veth, ep.mac); err != nil {
return fmt.Errorf("could not set mac address to the container interface: %v", err)
}
if iNames := jinfo.InterfaceName(); iNames != nil {
err = iNames.SetNames(name2, "eth")
if err != nil {
return err
}
}
err = jinfo.SetGateway(bridgeIP.IP)
if err != nil {
return err
}
d.peerDbAdd(nid, eid, ep.addr.IP, ep.mac,
d.serfInstance.LocalMember().Addr, true)
d.notifyCh <- ovNotify{
action: "join",
nid: nid,
eid: eid,
}
return nil
}
func (d *driver) CreateEndpoint(nid, eid types.UUID, epInfo driverapi.EndpointInfo, epOptions map[string]interface{}) error {
var (
ipv6Addr *net.IPNet
err error
)
defer sandbox.InitOSContext()()
if epInfo == nil {
return errors.New("invalid endpoint info passed")
}
if len(epInfo.Interfaces()) != 0 {
return errors.New("non empty interface list passed to bridge(local) driver")
}
// Get the network handler and make sure it exists
d.Lock()
n, ok := d.networks[nid]
d.Unlock()
if !ok {
return types.NotFoundErrorf("network %s does not exist", nid)
}
if n == nil {
return driverapi.ErrNoNetwork(nid)
}
// Sanity check
n.Lock()
if n.id != nid {
n.Unlock()
return InvalidNetworkIDError(nid)
}
n.Unlock()
// Check if endpoint id is good and retrieve correspondent endpoint
ep, err := n.getEndpoint(eid)
if err != nil {
return err
}
// Endpoint with that id exists either on desired or other sandbox
if ep != nil {
return driverapi.ErrEndpointExists(eid)
}
// Try to convert the options to endpoint configuration
epConfig, err := parseEndpointOptions(epOptions)
if err != nil {
return err
}
// Create and add the endpoint
n.Lock()
endpoint := &bridgeEndpoint{id: eid, config: epConfig}
n.endpoints[eid] = endpoint
n.Unlock()
// On failure make sure to remove the endpoint
defer func() {
if err != nil {
n.Lock()
delete(n.endpoints, eid)
n.Unlock()
}
}()
// Generate a name for what will be the host side pipe interface
hostIfName, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
if err != nil {
return err
}
// Generate a name for what will be the sandbox side pipe interface
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: 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(hostIfName)
if err != nil {
return err
}
defer func() {
if err != nil {
netlink.LinkDel(host)
}
}()
// Get the sandbox side pipe interface handler
sbox, err := netlink.LinkByName(containerIfName)
if err != nil {
return err
}
defer func() {
if err != nil {
netlink.LinkDel(sbox)
}
}()
n.Lock()
config := n.config
n.Unlock()
// Add bridge inherited attributes to pipe interfaces
if config.Mtu != 0 {
err = netlink.LinkSetMTU(host, config.Mtu)
if err != nil {
return err
}
err = netlink.LinkSetMTU(sbox, config.Mtu)
if err != nil {
return err
}
}
// Attach host side pipe interface into the bridge
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 {
err = setHairpinMode(host, true)
if err != nil {
return err
}
}
// v4 address for the sandbox side pipe interface
ip4, err := ipAllocator.RequestIP(n.bridge.bridgeIPv4, nil)
if err != nil {
return err
}
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 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 {
var ip6 net.IP
network := n.bridge.bridgeIPv6
if config.FixedCIDRv6 != nil {
network = config.FixedCIDRv6
}
ones, _ := network.Mask.Size()
if ones <= 80 {
ip6 = make(net.IP, len(network.IP))
copy(ip6, network.IP)
for i, h := range mac {
ip6[i+10] = h
}
}
ip6, err := ipAllocator.RequestIP(network, ip6)
if err != nil {
return err
}
ipv6Addr = &net.IPNet{IP: ip6, Mask: network.Mask}
}
// Create the sandbox side pipe interface
endpoint.srcName = containerIfName
endpoint.addr = ipv4Addr
if config.EnableIPv6 {
endpoint.addrv6 = ipv6Addr
}
err = epInfo.AddInterface(ifaceID, endpoint.macAddress, *ipv4Addr, *ipv6Addr)
if err != nil {
return err
}
// Program any required port mapping and store them in the endpoint
endpoint.portMapping, err = n.allocatePorts(epConfig, endpoint, config.DefaultBindingIP, config.EnableUserlandProxy)
if err != nil {
return err
}
return nil
}
func (e *endpoints) create(eid string, ifInfo *driverapi.EndpointInterface, niConfig networkConfig) (err error) {
ep := endpoint{}
// Generate a name for what will be the host side pipe interface
hostIfName, err := netutils.GenerateIfaceName(vethPrefix, vethLen)
if err != nil {
return err
}
// Generate a name for what will be the sandbox side pipe interface
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: hostIfName, TxQLen: 0},
PeerName: containerIfName,
}
if err = netlink.LinkAdd(veth); err != nil {
return types.InternalErrorf("failed to add the host (%s) <=> sandbox (%s) pair interfaces: %v", hostIfName, containerIfName, err)
}
// Get the host side pipe interface handler
host, err := netlink.LinkByName(hostIfName)
if err != nil {
return types.InternalErrorf("failed to find host side interface %s: %v", hostIfName, err)
}
defer func() {
if err != nil {
netlink.LinkDel(host)
}
}()
// Get the sandbox side pipe interface handler
sbox, err := netlink.LinkByName(containerIfName)
if err != nil {
return types.InternalErrorf("failed to find sandbox side interface %s: %v", containerIfName, err)
}
defer func() {
if err != nil {
netlink.LinkDel(sbox)
}
}()
// Add bridge inherited attributes to pipe interfaces
if niConfig.Mtu != 0 {
err = netlink.LinkSetMTU(host, niConfig.Mtu)
if err != nil {
return types.InternalErrorf("failed to set MTU on host interface %s: %v", hostIfName, err)
}
err = netlink.LinkSetMTU(sbox, niConfig.Mtu)
if err != nil {
return types.InternalErrorf("failed to set MTU on sandbox interface %s: %v", containerIfName, err)
}
}
// Attach host side pipe interface into the bridge
br, err := netlink.LinkByName(niConfig.BridgeName)
if err != nil {
return types.InternalErrorf("failed to find bridge by name %s: %v", niConfig.BridgeName, err)
}
if err = netlink.LinkSetMaster(host, br.(*netlink.Bridge)); err != nil {
return fmt.Errorf("adding interface %s to bridge %s failed: %v", hostIfName, niConfig.BridgeName, err)
}
// Create the sandbox side pipe interface
ep.ifname = containerIfName
ep.addr, _, err = net.ParseCIDR(ifInfo.Address)
if err != nil {
return fmt.Errorf("ipv4 adress unparseable")
}
/*
_, ep.addrv6, err = net.ParseCIDR(ifInfo.AddressIPv6)
if err != nil {
return fmt.Errorf("ipv6 adress unparseable")
}
*/
if ifInfo.MacAddress != "" {
ep.mac, err = net.ParseMAC(ifInfo.MacAddress)
if err != nil {
return fmt.Errorf("mac adress unparseable")
}
// 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)
}
err = netlink.LinkSetHardwareAddr(sbox, ep.mac)
if err != nil {
return fmt.Errorf("could not set mac address for container interface %s: %v", containerIfName, err)
}
if err = netlink.LinkSetUp(sbox); err != nil {
return fmt.Errorf("could not set link up for container interface %s: %v", containerIfName, err)
}
} else {
// Get existing mac address from interface
ep.mac = sbox.Attrs().HardwareAddr
}
// 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)
}
if ep.addrv6 == nil && niConfig.EnableIPv6 {
return fmt.Errorf("IPV6 is not supported. Go and code it yourself.")
}
e.add(eid, ep)
Log.Debugf("ep data at join: ip: %v, mac: %v", ep.addr, ep.mac)
broadcastChange(br, ep)
return nil
}
