// create and attach a veth to the Weave bridge
func CreateAndAttachVeth(name, peerName, bridgeName string, mtu int, keepTXOn bool, init func(peer netlink.Link) error) (*netlink.Veth, error) {
bridge, err := netlink.LinkByName(bridgeName)
if err != nil {
return nil, fmt.Errorf(`bridge "%s" not present; did you launch weave?`, bridgeName)
}
if mtu == 0 {
mtu = bridge.Attrs().MTU
}
veth := &netlink.Veth{
LinkAttrs: netlink.LinkAttrs{
Name: name,
MTU: mtu},
PeerName: peerName,
}
if err := netlink.LinkAdd(veth); err != nil {
return nil, fmt.Errorf(`could not create veth pair %s-%s: %s`, name, peerName, err)
}
cleanup := func(format string, a ...interface{}) (*netlink.Veth, error) {
netlink.LinkDel(veth)
return nil, fmt.Errorf(format, a...)
}
switch bridgeType := DetectBridgeType(bridgeName, DatapathName); bridgeType {
case Bridge, BridgedFastdp:
if err := netlink.LinkSetMasterByIndex(veth, bridge.Attrs().Index); err != nil {
return cleanup(`unable to set master of %s: %s`, name, err)
}
if bridgeType == Bridge && !keepTXOn {
if err := EthtoolTXOff(peerName); err != nil {
return cleanup(`unable to set tx off on %q: %s`, peerName, err)
}
}
case Fastdp:
if err := odp.AddDatapathInterface(bridgeName, name); err != nil {
return cleanup(`failed to attach %s to device "%s": %s`, name, bridgeName, err)
}
default:
return cleanup(`invalid bridge configuration`)
}
if init != nil {
peer, err := netlink.LinkByName(peerName)
if err != nil {
return cleanup("unable to find peer veth %s: %s", peerName, err)
}
if err := init(peer); err != nil {
return cleanup("initializing veth: %s", err)
}
}
if err := netlink.LinkSetUp(veth); err != nil {
return cleanup("unable to bring veth up: %s", err)
}
return veth, nil
}
func (driver *driver) JoinEndpoint(j *api.JoinRequest) (*api.JoinResponse, error) {
endID := j.EndpointID
maybeBridge, err := netlink.LinkByName(WeaveBridge)
if err != nil {
return nil, errorf(`bridge "%s" not present; did you launch weave?`, WeaveBridge)
}
// create and attach local name to the bridge
local := vethPair(endID[:5])
local.Attrs().MTU = maybeBridge.Attrs().MTU
if err := netlink.LinkAdd(local); err != nil {
return nil, errorf("could not create veth pair: %s", err)
}
switch maybeBridge.(type) {
case *netlink.Bridge:
if err := netlink.LinkSetMasterByIndex(local, maybeBridge.Attrs().Index); err != nil {
return nil, errorf(`unable to set master: %s`, err)
}
case *netlink.GenericLink:
if maybeBridge.Type() != "openvswitch" {
Log.Errorf("device %s is %+v", WeaveBridge, maybeBridge)
return nil, errorf(`device "%s" is of type "%s"`, WeaveBridge, maybeBridge.Type())
}
odp.AddDatapathInterface(WeaveBridge, local.Name)
case *netlink.Device:
Log.Warnf("kernel does not report what kind of device %s is, just %+v", WeaveBridge, maybeBridge)
// Assume it's our openvswitch device, and the kernel has not been updated to report the kind.
odp.AddDatapathInterface(WeaveBridge, local.Name)
default:
Log.Errorf("device %s is %+v", WeaveBridge, maybeBridge)
return nil, errorf(`device "%s" not a bridge`, WeaveBridge)
}
if err := netlink.LinkSetUp(local); err != nil {
return nil, errorf(`unable to bring veth up: %s`, err)
}
ifname := &api.InterfaceName{
SrcName: local.PeerName,
DstPrefix: "ethwe",
}
response := &api.JoinResponse{
InterfaceName: ifname,
}
if !driver.noMulticastRoute {
multicastRoute := api.StaticRoute{
Destination: "224.0.0.0/4",
RouteType: types.CONNECTED,
}
response.StaticRoutes = append(response.StaticRoutes, multicastRoute)
}
Log.Infof("Join endpoint %s:%s to %s", j.NetworkID, j.EndpointID, j.SandboxKey)
return response, nil
}
func (driver *driver) JoinEndpoint(j *api.JoinRequest) (*api.JoinResponse, error) {
endID := j.EndpointID
// create and attach local name to the bridge
local := vethPair(endID[:5])
if err := netlink.LinkAdd(local); err != nil {
return nil, errorf("could not create veth pair: %s", err)
}
if maybeBridge, err := netlink.LinkByName(WeaveBridge); err != nil {
return nil, errorf(`bridge "%s" not present; did you launch weave?`, WeaveBridge)
} else {
switch maybeBridge.(type) {
case *netlink.Bridge:
if err := netlink.LinkSetMasterByIndex(local, maybeBridge.Attrs().Index); err != nil {
return nil, errorf(`unable to set master: %s`, err)
}
case *netlink.GenericLink:
if maybeBridge.Type() != "openvswitch" {
Log.Errorf("device %s is %+v", WeaveBridge, maybeBridge)
return nil, errorf(`device "%s" is of type "%s"`, WeaveBridge, maybeBridge.Type())
}
odp.AddDatapathInterface(WeaveBridge, local.Name)
default:
Log.Errorf("device %s is %+v", WeaveBridge, maybeBridge)
return nil, errorf(`device "%s" not a bridge`, WeaveBridge)
}
}
if err := netlink.LinkSetUp(local); err != nil {
return nil, errorf(`unable to bring veth up: %s`, err)
}
ifname := &api.InterfaceName{
SrcName: local.PeerName,
DstPrefix: "ethwe",
}
response := &api.JoinResponse{
InterfaceName: ifname,
}
if driver.nameserver != "" {
routeToDNS := api.StaticRoute{
Destination: driver.nameserver + "/32",
RouteType: types.CONNECTED,
NextHop: "",
}
response.StaticRoutes = []api.StaticRoute{routeToDNS}
}
Log.Infof("Join endpoint %s:%s to %s", j.NetworkID, j.EndpointID, j.SandboxKey)
return response, nil
}
func resourceLXCBridgeCreate(d *schema.ResourceData, meta interface{}) error {
br := d.Get("name").(string)
var bridge netlink.Link
bridge, err := netlink.LinkByName(br)
if err != nil {
bridge = &netlink.Bridge{netlink.LinkAttrs{
Name: d.Get("name").(string),
}}
if err := netlink.LinkAdd(bridge); err != nil {
return fmt.Errorf("Error creating bridge %s: %v", br, err)
}
if ifaceName, ok := d.GetOk("hostInterface"); ok {
iface, err := netlink.LinkByName(ifaceName.(string))
if err != nil {
return fmt.Errorf("Error adding host interface %s to bridge %s : unknow host interface %v", ifaceName, br, err)
}
if err := netlink.LinkSetMasterByIndex(iface, bridge.Attrs().Index); err != nil {
return fmt.Errorf("Error adding host interface %s to bridge %s : %v", ifaceName, br, err)
}
}
log.Printf("[INFO] Created new bridge %s: %v", br, bridge)
} else {
log.Printf("[INFO] Found existing bridge %s: %v", br, bridge)
}
log.Printf("[INFO] Bringing bridge %s up", br)
if err := netlink.LinkSetUp(bridge); err != nil {
return fmt.Errorf("Error bringing bridge %s up: %v", br, err)
}
d.SetId(strconv.Itoa(bridge.Attrs().Index))
return resourceLXCBridgeRead(d, meta)
}