b88f173c43
This takes some of the machinery from CNI and from the rkt networking code, and turns it into a library that can be linked into go apps. Included is an example command-line application that uses the library, called `cnitool`. Other headline changes: * Plugin exec'ing is factored out The motivation here is to factor out the protocol for invoking plugins. To that end, a generalisation of the code from api.go and pkg/plugin/ipam.go goes into pkg/invoke/exec.go. * Move argument-handling and conf-loading into public API The fact that the arguments get turned into an environment for the plugin is incidental to the API; so, provide a way of supplying them as a struct or saying "just use the same arguments as I got" (the latter is for IPAM plugins).
94 lines
1.9 KiB
Go
94 lines
1.9 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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"errors"
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"github.com/appc/cni/plugins/ipam/host-local/backend/disk"
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"github.com/appc/cni/pkg/skel"
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"github.com/appc/cni/pkg/types"
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)
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func main() {
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skel.PluginMain(cmdAdd, cmdDel)
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}
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func cmdAdd(args *skel.CmdArgs) error {
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ipamConf, err := LoadIPAMConfig(args.StdinData, args.Args)
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if err != nil {
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return err
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}
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store, err := disk.New(ipamConf.Name)
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if err != nil {
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return err
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}
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defer store.Close()
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ipamArgs := IPAMArgs{}
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err = types.LoadArgs(args.Args, &ipamArgs)
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if err != nil {
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return err
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}
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ipamConf.Args = &ipamArgs
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allocator, err := NewIPAllocator(ipamConf, store)
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if err != nil {
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return err
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}
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var ipConf *types.IPConfig
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switch ipamConf.Type {
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case "host-local":
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ipConf, err = allocator.Get(args.ContainerID)
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case "host-local-ptp":
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ipConf, err = allocator.GetPtP(args.ContainerID)
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default:
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return errors.New("Unsupported IPAM plugin type")
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}
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if err != nil {
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return err
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}
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r := &types.Result{
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IP4: ipConf,
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}
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return r.Print()
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}
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func cmdDel(args *skel.CmdArgs) error {
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ipamConf, err := LoadIPAMConfig(args.StdinData, args.Args)
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if err != nil {
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return err
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}
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store, err := disk.New(ipamConf.Name)
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if err != nil {
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return err
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}
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defer store.Close()
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allocator, err := NewIPAllocator(ipamConf, store)
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if err != nil {
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return err
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}
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return allocator.Release(args.ContainerID)
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}
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