func cmdAdd(args *skel.CmdArgs) error {
tuningConf := TuningConf{}
if err := json.Unmarshal(args.StdinData, &tuningConf); err != nil {
return fmt.Errorf("failed to load netconf: %v", err)
}
// The directory /proc/sys/net is per network namespace. Enter in the
// network namespace before writing on it.
err := ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
for key, value := range tuningConf.SysCtl {
fileName := filepath.Join("/proc/sys", strings.Replace(key, ".", "/", -1))
fileName = filepath.Clean(fileName)
// Refuse to modify sysctl parameters that don't belong
// to the network subsystem.
if !strings.HasPrefix(fileName, "/proc/sys/net/") {
return fmt.Errorf("invalid net sysctl key: %q", key)
}
content := []byte(value)
err := ioutil.WriteFile(fileName, content, 0644)
if err != nil {
return err
}
}
return nil
})
if err != nil {
return err
}
result := types.Result{}
return result.Print()
}
func cmdAdd(args *skel.CmdArgs) error {
result := types.Result{}
if err := rpcCall("DHCP.Allocate", args, &result); err != nil {
return err
}
return result.Print()
}
// Allocate acquires an IP from a DHCP server for a specified container.
// The acquired lease will be maintained until Release() is called.
func (d *DHCP) Allocate(args *skel.CmdArgs, result *types.Result) error {
conf := types.NetConf{}
if err := json.Unmarshal(args.StdinData, &conf); err != nil {
return fmt.Errorf("error parsing netconf: %v", err)
}
clientID := args.ContainerID + "/" + conf.Name
l, err := AcquireLease(clientID, args.Netns, args.IfName)
if err != nil {
return err
}
ipn, err := l.IPNet()
if err != nil {
l.Stop()
return err
}
d.setLease(args.ContainerID, conf.Name, l)
result.IP4 = &types.IPConfig{
IP: *ipn,
Gateway: l.Gateway(),
Routes: l.Routes(),
}
return nil
}
func cmdAdd(args *skel.CmdArgs) error {
args.IfName = "lo" // ignore config, this only works for loopback
err := ns.WithNetNSPath(args.Netns, false, func(hostNS *os.File) error {
link, err := netlink.LinkByName(args.IfName)
if err != nil {
return err // not tested
}
err = netlink.LinkSetUp(link)
if err != nil {
return err // not tested
}
return nil
})
if err != nil {
return err // not tested
}
result := types.Result{}
return result.Print()
}