pool_add_subnet.go

// Copyright © 2018 Cybozu
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

package cmd

import (
	"context"
	"errors"
	"net"

	"github.com/cybozu-go/coil/model"
	"github.com/cybozu-go/etcdutil"
	"github.com/cybozu-go/log"
	"github.com/cybozu-go/well"
	"github.com/spf13/cobra"
)

var addSubnetParams struct {
	Name   string
	Subnet *net.IPNet
}

// poolAddSubnetCmd represents the add-subnet command
var poolAddSubnetCmd = &cobra.Command{
	Use:   "add-subnet NAME SUBNET",
	Short: "adds a subnet to an existing pool",
	Long: `Adds a subnet to an existing pool.

The subnet size must be larger than the SIZE given when the pool was created.`,
	Args: func(cmd *cobra.Command, args []string) error {
		if len(args) != 2 {
			return errors.New("requires 2 argument")
		}

		_, subnet, err := net.ParseCIDR(args[1])
		if err != nil {
			return err
		}

		addSubnetParams.Name = args[0]
		addSubnetParams.Subnet = subnet
		return nil
	},
	Run: func(cmd *cobra.Command, args []string) {
		etcd, err := etcdutil.NewClient(etcdConfig)
		if err != nil {
			log.ErrorExit(err)
		}
		defer etcd.Close()

		m := model.NewEtcdModel(etcd)
		well.Go(func(ctx context.Context) error {
			return m.AddSubnet(ctx, addSubnetParams.Name, addSubnetParams.Subnet)
		})
		well.Stop()
		err = well.Wait()
		if err != nil {
			log.ErrorExit(err)
		}
	},
}

func init() {
	poolCmd.AddCommand(poolAddSubnetCmd)
}