mirror of
https://github.com/moby/moby.git
synced 2022-11-09 12:21:53 -05:00
130 lines
3.2 KiB
Go
130 lines
3.2 KiB
Go
package overlay
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import (
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"fmt"
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"net"
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log "github.com/Sirupsen/logrus"
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"github.com/docker/libnetwork/driverapi"
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"github.com/docker/libnetwork/types"
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"github.com/vishvananda/netlink"
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)
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// Join method is invoked when a Sandbox is attached to an endpoint.
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func (d *driver) Join(nid, eid string, sboxKey string, jinfo driverapi.JoinInfo, options map[string]interface{}) error {
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if err := validateID(nid, eid); err != nil {
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return err
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}
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n := d.network(nid)
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if n == nil {
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return fmt.Errorf("could not find network with id %s", nid)
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}
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ep := n.endpoint(eid)
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if ep == nil {
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return fmt.Errorf("could not find endpoint with id %s", eid)
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}
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s := n.getSubnetforIP(ep.addr)
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if s == nil {
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return fmt.Errorf("could not find subnet for endpoint %s", eid)
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}
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if err := n.obtainVxlanID(s); err != nil {
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return fmt.Errorf("couldn't get vxlan id for %q: %v", s.subnetIP.String(), err)
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}
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if err := n.joinSandbox(); err != nil {
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return fmt.Errorf("network sandbox join failed: %v", err)
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}
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if err := n.joinSubnetSandbox(s); err != nil {
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return fmt.Errorf("subnet sandbox join failed for %q: %v", s.subnetIP.String(), err)
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}
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// joinSubnetSandbox gets called when an endpoint comes up on a new subnet in the
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// overlay network. Hence the Endpoint count should be updated outside joinSubnetSandbox
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n.incEndpointCount()
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sbox := n.sandbox()
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name1, name2, err := createVethPair()
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if err != nil {
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return err
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}
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// Set the container interface and its peer MTU to 1450 to allow
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// for 50 bytes vxlan encap (inner eth header(14) + outer IP(20) +
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// outer UDP(8) + vxlan header(8))
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veth, err := netlink.LinkByName(name1)
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if err != nil {
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return fmt.Errorf("cound not find link by name %s: %v", name1, err)
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}
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err = netlink.LinkSetMTU(veth, vxlanVethMTU)
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if err != nil {
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return err
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}
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if err := sbox.AddInterface(name1, "veth",
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sbox.InterfaceOptions().Master(s.brName)); err != nil {
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return fmt.Errorf("could not add veth pair inside the network sandbox: %v", err)
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}
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veth, err = netlink.LinkByName(name2)
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if err != nil {
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return fmt.Errorf("could not find link by name %s: %v", name2, err)
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}
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err = netlink.LinkSetMTU(veth, vxlanVethMTU)
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if err != nil {
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return err
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}
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if err := netlink.LinkSetHardwareAddr(veth, ep.mac); err != nil {
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return fmt.Errorf("could not set mac address (%v) to the container interface: %v", ep.mac, err)
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}
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for _, sub := range n.subnets {
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if sub == s {
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continue
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}
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if err := jinfo.AddStaticRoute(sub.subnetIP, types.NEXTHOP, s.gwIP.IP); err != nil {
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log.Errorf("Adding subnet %s static route in network %q failed\n", s.subnetIP, n.id)
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}
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}
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if iNames := jinfo.InterfaceName(); iNames != nil {
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err = iNames.SetNames(name2, "eth")
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if err != nil {
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return err
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}
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}
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d.peerDbAdd(nid, eid, ep.addr.IP, ep.addr.Mask, ep.mac,
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net.ParseIP(d.bindAddress), true)
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d.pushLocalEndpointEvent("join", nid, eid)
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return nil
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}
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// Leave method is invoked when a Sandbox detaches from an endpoint.
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func (d *driver) Leave(nid, eid string) error {
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if err := validateID(nid, eid); err != nil {
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return err
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}
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n := d.network(nid)
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if n == nil {
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return fmt.Errorf("could not find network with id %s", nid)
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}
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d.notifyCh <- ovNotify{
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action: "leave",
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nid: nid,
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eid: eid,
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}
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n.leaveSandbox()
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return nil
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}
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