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
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
|
package network
import (
"encoding/json"
"fmt"
"io/ioutil"
"sort"
"strings"
"github.com/containernetworking/cni/libcni"
"github.com/containernetworking/plugins/plugins/ipam/host-local/backend/allocator"
"github.com/containers/common/pkg/config"
"github.com/containers/podman/v3/libpod/define"
"github.com/pkg/errors"
"github.com/sirupsen/logrus"
)
// ErrNoSuchNetworkInterface indicates that no network interface exists
var ErrNoSuchNetworkInterface = errors.New("unable to find interface name for network")
// GetCNIConfDir get CNI configuration directory
func GetCNIConfDir(configArg *config.Config) string {
if len(configArg.Network.NetworkConfigDir) < 1 {
dc, err := config.DefaultConfig()
if err != nil {
// Fallback to hard-coded dir
return CNIConfigDir
}
return dc.Network.NetworkConfigDir
}
return configArg.Network.NetworkConfigDir
}
// LoadCNIConfsFromDir loads all the CNI configurations from a dir
func LoadCNIConfsFromDir(dir string) ([]*libcni.NetworkConfigList, error) {
files, err := libcni.ConfFiles(dir, []string{".conflist"})
if err != nil {
return nil, err
}
sort.Strings(files)
configs := make([]*libcni.NetworkConfigList, 0, len(files))
for _, confFile := range files {
conf, err := libcni.ConfListFromFile(confFile)
if err != nil {
return nil, errors.Wrapf(err, "in %s", confFile)
}
configs = append(configs, conf)
}
return configs, nil
}
// GetCNIConfigPathByNameOrID finds a CNI network by name and
// returns its configuration file path
func GetCNIConfigPathByNameOrID(config *config.Config, name string) (string, error) {
files, err := libcni.ConfFiles(GetCNIConfDir(config), []string{".conflist"})
if err != nil {
return "", err
}
idMatch := 0
file := ""
for _, confFile := range files {
conf, err := libcni.ConfListFromFile(confFile)
if err != nil {
return "", errors.Wrapf(err, "in %s", confFile)
}
if conf.Name == name {
return confFile, nil
}
if strings.HasPrefix(GetNetworkID(conf.Name), name) {
idMatch++
file = confFile
}
}
if idMatch == 1 {
return file, nil
}
if idMatch > 1 {
return "", errors.Errorf("more than one result for network ID %s", name)
}
return "", errors.Wrap(define.ErrNoSuchNetwork, fmt.Sprintf("unable to find network configuration for %s", name))
}
// ReadRawCNIConfByNameOrID reads the raw CNI configuration for a CNI
// network by name
func ReadRawCNIConfByNameOrID(config *config.Config, name string) ([]byte, error) {
confFile, err := GetCNIConfigPathByNameOrID(config, 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 {
plugins := make([]string, 0, len(list.Plugins))
for _, plug := range list.Plugins {
plugins = append(plugins, plug.Network.Type)
}
return strings.Join(plugins, ",")
}
// GetNetworkLabels returns a list of labels as a string
func GetNetworkLabels(list *libcni.NetworkConfigList) NcLabels {
cniJSON := make(map[string]interface{})
err := json.Unmarshal(list.Bytes, &cniJSON)
if err != nil {
logrus.Errorf("failed to unmarshal network config %v %v", cniJSON["name"], err)
return nil
}
if args, ok := cniJSON["args"]; ok {
if key, ok := args.(map[string]interface{}); ok {
if labels, ok := key[PodmanLabelKey]; ok {
if labels, ok := labels.(map[string]interface{}); ok {
result := make(NcLabels, len(labels))
for k, v := range labels {
if v, ok := v.(string); ok {
result[k] = v
} else {
logrus.Errorf("network config %v invalid label value type %T should be string", cniJSON["name"], labels)
}
}
return result
}
logrus.Errorf("network config %v invalid label type %T should be map[string]string", cniJSON["name"], labels)
}
}
}
return nil
}
// GetNetworksFromFilesystem gets all the networks from the cni configuration
// files
func GetNetworksFromFilesystem(config *config.Config) ([]*allocator.Net, error) {
var cniNetworks []*allocator.Net
networks, err := LoadCNIConfsFromDir(GetCNIConfDir(config))
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(config *config.Config) ([]string, error) {
networks, err := LoadCNIConfsFromDir(GetCNIConfDir(config))
if err != nil {
return nil, err
}
networkNames := []string{}
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 "", ErrNoSuchNetworkInterface
}
return name, nil
}
// GetBridgeNamesFromFileSystem is a convenience function to get all the bridge
// names from the configured networks
func GetBridgeNamesFromFileSystem(config *config.Config) ([]string, error) {
networks, err := LoadCNIConfsFromDir(GetCNIConfDir(config))
if err != nil {
return nil, err
}
bridgeNames := []string{}
for _, n := range networks {
var name string
// iterate network conflists
for _, cniplugin := range n.Plugins {
// iterate plugins
if cniplugin.Network.Type == "bridge" {
plugin := make(map[string]interface{})
if err := json.Unmarshal(cniplugin.Bytes, &plugin); err != nil {
continue
}
name = plugin["bridge"].(string)
}
}
bridgeNames = append(bridgeNames, name)
}
return bridgeNames, nil
}
|
