func (d NetworkDriver) Join(request *network.JoinRequest) (*network.JoinResponse, error) {
logutils.JSONMessage("Join", request)
// 1) Set up a veth pair
// The one end will stay in the host network namespace - named caliXXXXX
// The other end is given a temporary name. It's moved into the final network namespace by libnetwork itself.
var err error
prefix := request.EndpointID[:mathutils.MinInt(11, len(request.EndpointID))]
hostInterfaceName := "cali" + prefix
tempInterfaceName := "temp" + prefix
if err = netns.CreateVeth(hostInterfaceName, tempInterfaceName); err != nil {
err = errors.Wrapf(
err, "Veth creation error, hostInterfaceName=%v, tempInterfaceName=%v",
hostInterfaceName, tempInterfaceName)
log.Errorln(err)
return nil, err
}
// libnetwork doesn't set the MAC address properly, so set it here.
if err = netns.SetVethMac(tempInterfaceName, d.fixedMac); err != nil {
log.Debugf("Veth mac setting for %v failed, removing veth for %v\n", tempInterfaceName, hostInterfaceName)
err = netns.RemoveVeth(hostInterfaceName)
err = errors.Wrapf(err, "Veth removing for %v error", hostInterfaceName)
log.Errorln(err)
return nil, err
}
resp := &network.JoinResponse{
InterfaceName: network.InterfaceName{
SrcName: tempInterfaceName,
DstPrefix: IFPrefix,
},
}
// One of the network gateway addresses indicate that we are using
// Calico IPAM driver. In this case we setup routes using the gateways
// configured on the endpoint (which will be our host IPs).
log.Debugln("Using Calico IPAM driver, configure gateway and static routes to the host")
resp.Gateway = d.DummyIPV4Nexthop
resp.StaticRoutes = append(resp.StaticRoutes, &network.StaticRoute{
Destination: d.DummyIPV4Nexthop + "/32",
RouteType: 1, // 1 = CONNECTED
NextHop: "",
})
logutils.JSONMessage("Join response", resp)
return resp, nil
}
func (d NetworkDriver) Leave(request *network.LeaveRequest) error {
logutils.JSONMessage("Leave response", request)
caliName := "cali" + request.EndpointID[:mathutils.MinInt(11, len(request.EndpointID))]
err := netns.RemoveVeth(caliName)
return err
}