97664d8a6a
This change improves the performance of the ipam.ConfigureIface. Some plugins are slow because of the ip.SettleAddress in ipam.ConfigureIface. It seems to be only needed for IPv6, so should be skipped if only IPv4 is used.
92 lines
2.4 KiB
Go
92 lines
2.4 KiB
Go
// Copyright 2015 CNI authors
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
package ipam
|
|
|
|
import (
|
|
"fmt"
|
|
"net"
|
|
"os"
|
|
|
|
"github.com/containernetworking/cni/pkg/types/current"
|
|
"github.com/containernetworking/plugins/pkg/ip"
|
|
|
|
"github.com/vishvananda/netlink"
|
|
)
|
|
|
|
// ConfigureIface takes the result of IPAM plugin and
|
|
// applies to the ifName interface
|
|
func ConfigureIface(ifName string, res *current.Result) error {
|
|
if len(res.Interfaces) == 0 {
|
|
return fmt.Errorf("no interfaces to configure")
|
|
}
|
|
|
|
link, err := netlink.LinkByName(ifName)
|
|
if err != nil {
|
|
return fmt.Errorf("failed to lookup %q: %v", ifName, err)
|
|
}
|
|
|
|
if err := netlink.LinkSetUp(link); err != nil {
|
|
return fmt.Errorf("failed to set %q UP: %v", ifName, err)
|
|
}
|
|
|
|
var v4gw, v6gw net.IP
|
|
for _, ipc := range res.IPs {
|
|
if ipc.Interface == nil {
|
|
continue
|
|
}
|
|
intIdx := *ipc.Interface
|
|
if intIdx < 0 || intIdx >= len(res.Interfaces) || res.Interfaces[intIdx].Name != ifName {
|
|
// IP address is for a different interface
|
|
return fmt.Errorf("failed to add IP addr %v to %q: invalid interface index", ipc, ifName)
|
|
}
|
|
|
|
addr := &netlink.Addr{IPNet: &ipc.Address, Label: ""}
|
|
if err = netlink.AddrAdd(link, addr); err != nil {
|
|
return fmt.Errorf("failed to add IP addr %v to %q: %v", ipc, ifName, err)
|
|
}
|
|
|
|
gwIsV4 := ipc.Gateway.To4() != nil
|
|
if gwIsV4 && v4gw == nil {
|
|
v4gw = ipc.Gateway
|
|
} else if !gwIsV4 && v6gw == nil {
|
|
v6gw = ipc.Gateway
|
|
}
|
|
}
|
|
|
|
if v6gw != nil {
|
|
ip.SettleAddresses(ifName, 10)
|
|
}
|
|
|
|
for _, r := range res.Routes {
|
|
routeIsV4 := r.Dst.IP.To4() != nil
|
|
gw := r.GW
|
|
if gw == nil {
|
|
if routeIsV4 && v4gw != nil {
|
|
gw = v4gw
|
|
} else if !routeIsV4 && v6gw != nil {
|
|
gw = v6gw
|
|
}
|
|
}
|
|
if err = ip.AddRoute(&r.Dst, gw, link); err != nil {
|
|
// we skip over duplicate routes as we assume the first one wins
|
|
if !os.IsExist(err) {
|
|
return fmt.Errorf("failed to add route '%v via %v dev %v': %v", r.Dst, gw, ifName, err)
|
|
}
|
|
}
|
|
}
|
|
|
|
return nil
|
|
}
|