05683bf11d
The 'flannel' meta plugin delegates to other plugins to do the actual
OS-level work. It used the ipam.Exec{Add,Del} procedures for this
delegation, since those do precisely what's needed.
However this is a bit misleading, since the flannel plugin _isn't_
doing this for IPAM, and the ipam.Exec* procedures aren't doing
something specific to IPAM plugins.
So: anticipating that there may be more meta plugins that want to
delegate in the same way, this commit moves generic delegation
procedures to `pkg/invoke`, and makes the `pkg/ipam` procedures (still
used, accurately, in the non-meta plugins) shims.
69 lines
1.9 KiB
Go
69 lines
1.9 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"
|
|
"os"
|
|
|
|
"github.com/appc/cni/pkg/invoke"
|
|
"github.com/appc/cni/pkg/ip"
|
|
"github.com/appc/cni/pkg/types"
|
|
|
|
"github.com/vishvananda/netlink"
|
|
)
|
|
|
|
func ExecAdd(plugin string, netconf []byte) (*types.Result, error) {
|
|
return invoke.DelegateAdd(plugin, netconf)
|
|
}
|
|
|
|
func ExecDel(plugin string, netconf []byte) error {
|
|
return invoke.DelegateDel(plugin, netconf)
|
|
}
|
|
|
|
// ConfigureIface takes the result of IPAM plugin and
|
|
// applies to the ifName interface
|
|
func ConfigureIface(ifName string, res *types.Result) error {
|
|
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)
|
|
}
|
|
|
|
// TODO(eyakubovich): IPv6
|
|
addr := &netlink.Addr{IPNet: &res.IP4.IP, Label: ""}
|
|
if err = netlink.AddrAdd(link, addr); err != nil {
|
|
return fmt.Errorf("failed to add IP addr to %q: %v", ifName, err)
|
|
}
|
|
|
|
for _, r := range res.IP4.Routes {
|
|
gw := r.GW
|
|
if gw == nil {
|
|
gw = res.IP4.Gateway
|
|
}
|
|
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
|
|
}
|