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).
69 lines
1.7 KiB
Go
69 lines
1.7 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 libcni
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import (
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"strings"
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"github.com/appc/cni/pkg/invoke"
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"github.com/appc/cni/pkg/types"
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)
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type RuntimeConf struct {
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ContainerID string
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NetNS string
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IfName string
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Args [][2]string
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}
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type NetworkConfig struct {
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Network *types.NetConf
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Bytes []byte
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}
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type CNI interface {
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AddNetwork(net *NetworkConfig, rt *RuntimeConf) (*types.Result, error)
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DelNetwork(net *NetworkConfig, rt *RuntimeConf) error
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}
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type CNIConfig struct {
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Path []string
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}
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func (c *CNIConfig) AddNetwork(net *NetworkConfig, rt *RuntimeConf) (*types.Result, error) {
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return c.execPlugin("ADD", net, rt)
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}
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func (c *CNIConfig) DelNetwork(net *NetworkConfig, rt *RuntimeConf) error {
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_, err := c.execPlugin("DEL", net, rt)
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return err
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}
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// =====
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func (c *CNIConfig) execPlugin(action string, conf *NetworkConfig, rt *RuntimeConf) (*types.Result, error) {
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pluginPath := invoke.FindInPath(conf.Network.Type, c.Path)
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args := &invoke.Args{
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Command: action,
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ContainerID: rt.ContainerID,
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NetNS: rt.NetNS,
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PluginArgs: rt.Args,
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IfName: rt.IfName,
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Path: strings.Join(c.Path, ":"),
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}
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return invoke.ExecPlugin(pluginPath, conf.Bytes, args)
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}
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