/
network.go
105 lines (88 loc) · 3.08 KB
/
network.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
package main
import (
"fmt"
"os/exec"
"strings"
"github.com/lxc/lxd/shared"
)
func networkInterfaces(routers Routers) ([]string, []string, error) {
vethInterfaces := []string{}
bridgeInterfaces := []string{}
for _, r := range routers {
for _, p := range r.Peers {
if strings.HasPrefix(p.Interface, "v") {
veth := strings.TrimSuffix(strings.TrimSuffix(p.Interface, "-1"), "-2")
if !shared.StringInSlice(veth, vethInterfaces) {
vethInterfaces = append(vethInterfaces, veth)
}
} else if strings.HasPrefix(p.Interface, "br") {
if !shared.StringInSlice(p.Interface, bridgeInterfaces) {
bridgeInterfaces = append(bridgeInterfaces, p.Interface)
}
} else {
return nil, nil, fmt.Errorf("Invalid interface name: %s", p.Interface)
}
}
}
return vethInterfaces, bridgeInterfaces, nil
}
func networkCreate(routers Routers) error {
vethInterfaces, bridgeInterfaces, err := networkInterfaces(routers)
if err != nil {
return err
}
for _, veth := range vethInterfaces {
if !shared.PathExists(fmt.Sprintf("/sys/class/net/%s-1", veth)) && !shared.PathExists(fmt.Sprintf("/sys/class/net/%s-2", veth)) {
out, err := exec.Command("ip", "link", "add", "dev", fmt.Sprintf("%s-1", veth), "type", "veth", "peer", "name", fmt.Sprintf("%s-2", veth)).CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to create veth device: %s", out)
}
}
if shared.PathExists(fmt.Sprintf("/sys/class/net/%s-1", veth)) {
out, err := exec.Command("ip", "link", "set", "dev", fmt.Sprintf("%s-1", veth), "up").CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to bring veth device up: %s", out)
}
}
if shared.PathExists(fmt.Sprintf("/sys/class/net/%s-2", veth)) {
out, err := exec.Command("ip", "link", "set", "dev", fmt.Sprintf("%s-2", veth), "up").CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to bring veth device up: %s", out)
}
}
}
for _, bridge := range bridgeInterfaces {
if !shared.PathExists(fmt.Sprintf("/sys/class/net/%s", bridge)) {
out, err := exec.Command("ip", "link", "add", "dev", bridge, "type", "bridge").CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to create bridge device: %s", out)
}
}
out, err := exec.Command("ip", "link", "set", "dev", bridge, "up").CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to bring bridge device up: %s", out)
}
}
return nil
}
func networkDestroy(routers Routers) error {
vethInterfaces, _, err := networkInterfaces(routers)
if err != nil {
return err
}
for _, veth := range vethInterfaces {
if shared.PathExists(fmt.Sprintf("/sys/class/net/%s-1", veth)) {
out, err := exec.Command("ip", "link", "del", "dev", fmt.Sprintf("%s-1", veth)).CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to delete veth device up: %s", out)
}
}
if shared.PathExists(fmt.Sprintf("/sys/class/net/%s-2", veth)) {
out, err := exec.Command("ip", "link", "del", "dev", fmt.Sprintf("%s-2", veth)).CombinedOutput()
if err != nil {
return fmt.Errorf("Failed to delete veth device up: %s", out)
}
}
}
return nil
}