main.go

/*
Copyright 2019 The Arktos 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 main

import (
	"errors"
	"fmt"
	"time"

	"github.com/containernetworking/cni/pkg/skel"
	"github.com/containernetworking/cni/pkg/version"
	"github.com/containernetworking/plugins/pkg/ns"
	"github.com/futurewei-cloud/cniplugins/mizni/vnicmanager"
	"github.com/futurewei-cloud/cniplugins/vnic"
)

const capProbeTimeoutInMilliseconds = 1000 * 60 // 1 minute

func cmdAdd(args *skel.CmdArgs) error {
	vnics, err := vnic.LoadVNICs(args.Args)
	if err != nil {
		return fmt.Errorf("ADD op failed to load cni args: %v", err)
	}

	netconf, err := loadNetConf(args.StdinData)
	if err != nil {
		return fmt.Errorf("ADD op failed to load netconf: %v", err)
	}

	if netconf.ProbeTimeoutInMilliseconds > capProbeTimeoutInMilliseconds {
		return fmt.Errorf("Invalid netconf setting: prober timeout exceeds the cap of 60 seconds")
	}

	netns, err := ns.GetNS(args.Netns)
	if err != nil {
		return fmt.Errorf("failed to open netns %q: %v", args.Netns, err)
	}
	defer netns.Close()

	plugger := vnicmanager.New(vnics.VPC, args.Netns, time.Millisecond*time.Duration(netconf.ProbeTimeoutInMilliseconds))

	r, err := attachVNICs(plugger, vnics.NICs, args.ContainerID)
	if err != nil {
		return fmt.Errorf("ADD op failed to attach vnics: %v", err)
	}

	versionedResult, err := r.GetAsVersion(netconf.CNIVersion)
	if err != nil {
		return fmt.Errorf("ADD op failed to convert result: %v", err)
	}

	return versionedResult.Print()
}

func cmdDel(args *skel.CmdArgs) error {
	vnics, err := vnic.LoadVNICs(args.Args)
	if err != nil {
		return fmt.Errorf("DEL op failed to load cni args: %v", err)
	}

	netns, err := ns.GetNS(args.Netns)
	if err != nil {
		return fmt.Errorf("failed to open netns %q: %v", args.Netns, err)
	}
	defer netns.Close()

	unplugger := vnicmanager.New(vnics.VPC, args.Netns, 0) //probe timeout not used by unplugger; set 0 to satisfy the signiture
	return detachVNICs(unplugger, vnics.NICs)
}

func cmdCheck(args *skel.CmdArgs) error {
	return errors.New("not implemented")
}

func main() {
	supportVersions := version.PluginSupports("0.1.0", "0.2.0", "0.3.0", "0.3.1")
	skel.PluginMain(cmdAdd, cmdCheck, cmdDel, supportVersions, "mizni")
}