87 lines
1.8 KiB
Go
87 lines
1.8 KiB
Go
// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"fmt"
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"os"
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"path/filepath"
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"strings"
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"github.com/containernetworking/cni/libcni"
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)
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const (
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EnvCNIPath = "CNI_PATH"
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EnvNetDir = "NETCONFPATH"
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DefaultNetDir = "/etc/cni/net.d"
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CmdAdd = "add"
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CmdDel = "del"
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)
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func main() {
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if len(os.Args) < 3 {
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usage()
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return
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}
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netdir := os.Getenv(EnvNetDir)
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if netdir == "" {
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netdir = DefaultNetDir
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}
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netconf, err := libcni.LoadConf(netdir, os.Args[2])
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if err != nil {
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exit(err)
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}
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netns := os.Args[3]
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cninet := &libcni.CNIConfig{
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Path: strings.Split(os.Getenv(EnvCNIPath), ":"),
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}
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rt := &libcni.RuntimeConf{
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ContainerID: "cni",
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NetNS: netns,
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IfName: "eth0",
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}
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switch os.Args[1] {
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case CmdAdd:
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_, err := cninet.AddNetwork(netconf, rt)
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exit(err)
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case CmdDel:
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exit(cninet.DelNetwork(netconf, rt))
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}
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}
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func usage() {
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exe := filepath.Base(os.Args[0])
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fmt.Fprintf(os.Stderr, "%s: Add or remove network interfaces from a network namespace\n", exe)
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fmt.Fprintf(os.Stderr, " %s %s <net> <netns>\n", exe, CmdAdd)
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fmt.Fprintf(os.Stderr, " %s %s <net> <netns>\n", exe, CmdDel)
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os.Exit(1)
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}
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func exit(err error) {
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if err != nil {
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fmt.Fprintf(os.Stderr, "%s\n", err)
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os.Exit(1)
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}
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os.Exit(0)
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}
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