func (vb *VXLANBackend) handleSubnetEvents(batch subnet.EventBatch) {
for _, evt := range batch {
switch evt.Type {
case subnet.SubnetAdded:
log.Info("Subnet added: ", evt.Lease.Network)
if evt.Lease.Attrs.BackendType != "vxlan" {
log.Warningf("Ignoring non-vxlan subnet: type=%v", evt.Lease.Attrs.BackendType)
continue
}
var attrs vxlanLeaseAttrs
if err := json.Unmarshal(evt.Lease.Attrs.BackendData, &attrs); err != nil {
log.Error("Error decoding subnet lease JSON: ", err)
continue
}
if err := vb.dev.AddL2(neigh{IP: evt.Lease.Attrs.PublicIP, MAC: net.HardwareAddr(attrs.VtepMAC)}); err != nil {
log.Error("Error adding L2 entry: ", err)
}
if err := vb.dev.AddL3(neigh{IP: evt.Lease.Network.IP, MAC: net.HardwareAddr(attrs.VtepMAC)}); err != nil {
log.Error("Error adding L3 entry: ", err)
}
if err := vb.dev.AddRoute(evt.Lease.Network); err != nil {
log.Error("Error adding route: ", err)
}
case subnet.SubnetRemoved:
log.Info("Subnet removed: ", evt.Lease.Network)
if evt.Lease.Attrs.BackendType != "vxlan" {
log.Warningf("Ignoring non-vxlan subnet: type=%v", evt.Lease.Attrs.BackendType)
continue
}
var attrs vxlanLeaseAttrs
if err := json.Unmarshal(evt.Lease.Attrs.BackendData, &attrs); err != nil {
log.Error("Error decoding subnet lease JSON: ", err)
continue
}
if err := vb.dev.DelRoute(evt.Lease.Network); err != nil {
log.Error("Error deleting route: ", err)
}
if len(attrs.VtepMAC) > 0 {
if err := vb.dev.DelL2(neigh{IP: evt.Lease.Attrs.PublicIP, MAC: net.HardwareAddr(attrs.VtepMAC)}); err != nil {
log.Error("Error deleting L2 entry: ", err)
}
if err := vb.dev.DelL3(neigh{IP: evt.Lease.Network.IP, MAC: net.HardwareAddr(attrs.VtepMAC)}); err != nil {
log.Error("Error deleting L3 entry: ", err)
}
}
default:
log.Error("Internal error: unknown event type: ", int(evt.Type))
}
}
}
func (rb *HostgwBackend) handleSubnetEvents(batch subnet.EventBatch) {
for _, evt := range batch {
switch evt.Type {
case subnet.SubnetAdded:
log.Infof("Subnet added: %v via %v", evt.Lease.Network, evt.Lease.Attrs.PublicIP)
if evt.Lease.Attrs.BackendType != "host-gw" {
log.Warningf("Ignoring non-host-gw subnet: type=%v", evt.Lease.Attrs.BackendType)
continue
}
route := netlink.Route{
Dst: evt.Lease.Network.ToIPNet(),
Gw: evt.Lease.Attrs.PublicIP.ToIP(),
LinkIndex: rb.extIface.Index,
}
if err := netlink.RouteAdd(&route); err != nil {
log.Errorf("Error adding route to %v via %v: %v", evt.Lease.Network, evt.Lease.Attrs.PublicIP, err)
continue
}
case subnet.SubnetRemoved:
log.Info("Subnet removed: ", evt.Lease.Network)
if evt.Lease.Attrs.BackendType != "host-gw" {
log.Warningf("Ignoring non-host-gw subnet: type=%v", evt.Lease.Attrs.BackendType)
continue
}
route := netlink.Route{
Dst: evt.Lease.Network.ToIPNet(),
Gw: evt.Lease.Attrs.PublicIP.ToIP(),
LinkIndex: rb.extIface.Index,
}
if err := netlink.RouteDel(&route); err != nil {
log.Errorf("Error deleting route to %v: %v", evt.Lease.Network, err)
continue
}
default:
log.Error("Internal error: unknown event type: ", int(evt.Type))
}
}
}
func ensureLink(vxlan *netlink.Vxlan) (*netlink.Vxlan, error) {
err := netlink.LinkAdd(vxlan)
if err == syscall.EEXIST {
// it's ok if the device already exists as long as config is similar
existing, err := netlink.LinkByName(vxlan.Name)
if err != nil {
return nil, err
}
incompat := vxlanLinksIncompat(vxlan, existing)
if incompat == "" {
return existing.(*netlink.Vxlan), nil
}
// delete existing
log.Warningf("%q already exists with incompatable configuration: %v; recreating device", vxlan.Name, incompat)
if err = netlink.LinkDel(existing); err != nil {
return nil, fmt.Errorf("failed to delete interface: %v", err)
}
// create new
if err = netlink.LinkAdd(vxlan); err != nil {
return nil, fmt.Errorf("failed to create vxlan interface: %v", err)
}
} else if err != nil {
return nil, err
}
ifindex := vxlan.Index
link, err := netlink.LinkByIndex(vxlan.Index)
if err != nil {
return nil, fmt.Errorf("can't locate created vxlan device with index %v", ifindex)
}
var ok bool
if vxlan, ok = link.(*netlink.Vxlan); !ok {
return nil, fmt.Errorf("created vxlan device with index %v is not vxlan", ifindex)
}
return vxlan, nil
}
func (ipt *IPTables) Exists(table string, args ...string) (bool, error) {
checkPresent, err := getIptablesHasCheckCommand()
if err != nil {
log.Warningf("Error checking iptables version, assuming version at least 1.4.11: %v\n", err)
checkPresent = true
}
if !checkPresent {
cmd := append([]string{"-A"}, args...)
return existsForOldIpTables(table, strings.Join(cmd, " "))
} else {
cmd := append([]string{"-t", table, "-C"}, args...)
err = exec.Command(ipt.path, cmd...).Run()
}
switch {
case err == nil:
return true, nil
case err.(*exec.ExitError).Sys().(syscall.WaitStatus).ExitStatus() == 1:
return false, nil
default:
return false, err
}
}