-
Notifications
You must be signed in to change notification settings - Fork 64
/
create.go
105 lines (87 loc) · 2.73 KB
/
create.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
// SPDX-License-Identifier: BSD-3-Clause
// Copyright (c) 2022, Unikraft GmbH and The KraftKit Authors.
// Licensed under the BSD-3-Clause License (the "License").
// You may not use this file expect in compliance with the License.
package create
import (
"context"
"fmt"
"net"
"github.com/spf13/cobra"
"github.com/vishvananda/netlink"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
networkapi "kraftkit.sh/api/network/v1alpha1"
"kraftkit.sh/cmdfactory"
"kraftkit.sh/iostreams"
"kraftkit.sh/machine/network"
)
type CreateOptions struct {
Driver string `noattribute:"true"`
Network string `long:"network" short:"n" usage:"Set the gateway IP address and the subnet of the network in CIDR format."`
}
// Create a new local machine network.
func Create(ctx context.Context, opts *CreateOptions, args ...string) error {
if opts == nil {
opts = &CreateOptions{}
}
return opts.Run(ctx, args)
}
func NewCmd() *cobra.Command {
cmd, err := cmdfactory.New(&CreateOptions{}, cobra.Command{
Short: "Create a new machine network",
Use: "create [FLAGS] NETWORK",
Aliases: []string{"add"},
Args: cobra.ExactArgs(1),
Annotations: map[string]string{
cmdfactory.AnnotationHelpGroup: "net",
},
})
if err != nil {
panic(err)
}
return cmd
}
func (opts *CreateOptions) Pre(cmd *cobra.Command, _ []string) error {
opts.Driver = cmd.Flag("driver").Value.String()
// TODO(nderjung): A future implementation can list existing networks and
// generate new subnet and gateway appropriately. Simply calculate a new
// subnet which is out of bounds from all existing subnets for the given
// driver. Additionally, a gateway can be determined by selecting the first
// allocatable IP of a given subnet, i.e. 0.0.0.1. The subnet and gateway
// can therefore be expressed in the form X.Y.Z.1/N.
// if opts.Subnet == "" {
// return fmt.Errorf("cannot create network without subnet")
// }
if opts.Network == "" {
return fmt.Errorf("cannot create network without gateway and subnet in CIDR format")
}
return nil
}
func (opts *CreateOptions) Run(ctx context.Context, args []string) error {
var err error
strategy, ok := network.Strategies()[opts.Driver]
if !ok {
return fmt.Errorf("unsupported network driver strategy: %v (contributions welcome!)", opts.Driver)
}
controller, err := strategy.NewNetworkV1alpha1(ctx)
if err != nil {
return err
}
addr, err := netlink.ParseAddr(opts.Network)
if err != nil {
return err
}
if _, err := controller.Create(ctx, &networkapi.Network{
ObjectMeta: metav1.ObjectMeta{
Name: args[0],
},
Spec: networkapi.NetworkSpec{
Gateway: addr.IP.String(),
Netmask: net.IP(addr.Mask).String(),
},
}); err != nil {
return err
}
fmt.Fprintln(iostreams.G(ctx).Out, args[0])
return nil
}