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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
package network
import (
"encoding/json"
"io/ioutil"
"sort"
"strings"
"github.com/containernetworking/cni/libcni"
"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
"github.com/pkg/errors"
)
// LoadCNIConfsFromDir loads all the CNI configurations from a dir
func LoadCNIConfsFromDir(dir string) ([]*libcni.NetworkConfigList, error) {
var configs []*libcni.NetworkConfigList
files, err := libcni.ConfFiles(dir, []string{".conflist"})
if err != nil {
return nil, err
}
sort.Strings(files)
for _, confFile := range files {
conf, err := libcni.ConfListFromFile(confFile)
if err != nil {
return nil, err
}
configs = append(configs, conf)
}
return configs, nil
}
// GetCNIConfigPathByName finds a CNI network by name and
// returns its configuration file path
func GetCNIConfigPathByName(name string) (string, error) {
files, err := libcni.ConfFiles(CNIConfigDir, []string{".conflist"})
if err != nil {
return "", err
}
for _, confFile := range files {
conf, err := libcni.ConfListFromFile(confFile)
if err != nil {
return "", err
}
if conf.Name == name {
return confFile, nil
}
}
return "", errors.Errorf("unable to find network configuration for %s", name)
}
// ReadRawCNIConfByName reads the raw CNI configuration for a CNI
// network by name
func ReadRawCNIConfByName(name string) ([]byte, error) {
confFile, err := GetCNIConfigPathByName(name)
if err != nil {
return nil, err
}
b, err := ioutil.ReadFile(confFile)
return b, err
}
// GetCNIPlugins returns a list of plugins that a given network
// has in the form of a string
func GetCNIPlugins(list *libcni.NetworkConfigList) string {
var plugins []string
for _, plug := range list.Plugins {
plugins = append(plugins, plug.Network.Type)
}
return strings.Join(plugins, ",")
}
// GetNetworksFromFilesystem gets all the networks from the cni configuration
// files
func GetNetworksFromFilesystem() ([]*allocator.Net, error) {
var cniNetworks []*allocator.Net
networks, err := LoadCNIConfsFromDir(CNIConfigDir)
if err != nil {
return nil, err
}
for _, n := range networks {
for _, cniplugin := range n.Plugins {
if cniplugin.Network.Type == "bridge" {
ipamConf := allocator.Net{}
if err := json.Unmarshal(cniplugin.Bytes, &ipamConf); err != nil {
return nil, err
}
cniNetworks = append(cniNetworks, &ipamConf)
break
}
}
}
return cniNetworks, nil
}
// GetNetworkNamesFromFileSystem gets all the names from the cni network
// configuration files
func GetNetworkNamesFromFileSystem() ([]string, error) {
var networkNames []string
networks, err := LoadCNIConfsFromDir(CNIConfigDir)
if err != nil {
return nil, err
}
for _, n := range networks {
networkNames = append(networkNames, n.Name)
}
return networkNames, nil
}
// GetInterfaceNameFromConfig returns the interface name for the bridge plugin
func GetInterfaceNameFromConfig(path string) (string, error) {
var name string
conf, err := libcni.ConfListFromFile(path)
if err != nil {
return "", err
}
for _, cniplugin := range conf.Plugins {
if cniplugin.Network.Type == "bridge" {
plugin := make(map[string]interface{})
if err := json.Unmarshal(cniplugin.Bytes, &plugin); err != nil {
return "", err
}
name = plugin["bridge"].(string)
break
}
}
if len(name) == 0 {
return "", errors.New("unable to find interface name for network")
}
return name, nil
}
|
