forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 0
/
kubecfg.go
292 lines (269 loc) · 8.02 KB
/
kubecfg.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
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
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package kubecfg
import (
"encoding/json"
"fmt"
"io"
"io/ioutil"
"os"
"strconv"
"strings"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/labels"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util/wait"
"github.com/GoogleCloudPlatform/kubernetes/pkg/version"
"github.com/golang/glog"
"gopkg.in/v1/yaml"
)
func GetServerVersion(client *client.Client) (*version.Info, error) {
info, err := client.ServerVersion()
if err != nil {
return nil, fmt.Errorf("Got error: %v", err)
}
return info, nil
}
func promptForString(field string, r io.Reader) string {
fmt.Printf("Please enter %s: ", field)
var result string
fmt.Fscan(r, &result)
return result
}
type AuthInfo struct {
User string
Password string
CAFile string
CertFile string
KeyFile string
Insecure *bool
}
// LoadAuthInfo parses an AuthInfo object from a file path. It prompts user and creates file if it doesn't exist.
func LoadAuthInfo(path string, r io.Reader) (*AuthInfo, error) {
var auth AuthInfo
if _, err := os.Stat(path); os.IsNotExist(err) {
auth.User = promptForString("Username", r)
auth.Password = promptForString("Password", r)
data, err := json.Marshal(auth)
if err != nil {
return &auth, err
}
err = ioutil.WriteFile(path, data, 0600)
return &auth, err
}
data, err := ioutil.ReadFile(path)
if err != nil {
return nil, err
}
err = json.Unmarshal(data, &auth)
if err != nil {
return nil, err
}
return &auth, err
}
// Update performs a rolling update of a collection of pods.
// 'name' points to a replication controller.
// 'client' is used for updating pods.
// 'updatePeriod' is the time between pod updates.
// 'imageName' is the new image to update for the template. This will work
// with the first container in the pod. There is no support yet for
// updating more complex replication controllers. If this is blank then no
// update of the image is performed.
func Update(ctx api.Context, name string, client client.Interface, updatePeriod time.Duration, imageName string) error {
controller, err := client.GetReplicationController(ctx, name)
if err != nil {
return err
}
if len(imageName) != 0 {
controller.DesiredState.PodTemplate.DesiredState.Manifest.Containers[0].Image = imageName
controller, err = client.UpdateReplicationController(ctx, controller)
if err != nil {
return err
}
}
s := labels.Set(controller.DesiredState.ReplicaSelector).AsSelector()
podList, err := client.ListPods(ctx, s)
if err != nil {
return err
}
expected := len(podList.Items)
if expected == 0 {
return nil
}
for _, pod := range podList.Items {
// We delete the pod here, the controller will recreate it. This will result in pulling
// a new Docker image. This isn't a full "update" but it's what we support for now.
err = client.DeletePod(ctx, pod.ID)
if err != nil {
return err
}
time.Sleep(updatePeriod)
}
return wait.Poll(time.Second*5, time.Second*300, func() (bool, error) {
podList, err := client.ListPods(ctx, s)
if err != nil {
return false, err
}
return len(podList.Items) == expected, nil
})
}
// StopController stops a controller named 'name' by setting replicas to zero.
func StopController(ctx api.Context, name string, client client.Interface) error {
return ResizeController(ctx, name, 0, client)
}
// ResizeController resizes a controller named 'name' by setting replicas to 'replicas'.
func ResizeController(ctx api.Context, name string, replicas int, client client.Interface) error {
controller, err := client.GetReplicationController(ctx, name)
if err != nil {
return err
}
controller.DesiredState.Replicas = replicas
controllerOut, err := client.UpdateReplicationController(ctx, controller)
if err != nil {
return err
}
data, err := yaml.Marshal(controllerOut)
if err != nil {
return err
}
fmt.Print(string(data))
return nil
}
func portsFromString(spec string) ([]api.Port, error) {
if spec == "" {
return []api.Port{}, nil
}
parts := strings.Split(spec, ",")
var result []api.Port
for _, part := range parts {
pieces := strings.Split(part, ":")
if len(pieces) < 1 || len(pieces) > 2 {
glog.Infof("Bad port spec: %s", part)
return nil, fmt.Errorf("Bad port spec: %s", part)
}
host := 0
container := 0
var err error
if len(pieces) == 1 {
container, err = strconv.Atoi(pieces[0])
if err != nil {
glog.Errorf("Container port is not integer: %s %v", pieces[0], err)
return nil, err
}
} else {
host, err = strconv.Atoi(pieces[0])
if err != nil {
glog.Errorf("Host port is not integer: %s %v", pieces[0], err)
return nil, err
}
container, err = strconv.Atoi(pieces[1])
if err != nil {
glog.Errorf("Container port is not integer: %s %v", pieces[1], err)
return nil, err
}
}
if container < 1 {
glog.Errorf("Container port is not valid: %d", container)
return nil, err
}
result = append(result, api.Port{ContainerPort: container, HostPort: host})
}
return result, nil
}
// RunController creates a new replication controller named 'name' which creates 'replicas' pods running 'image'.
func RunController(ctx api.Context, image, name string, replicas int, client client.Interface, portSpec string, servicePort int) error {
if servicePort > 0 && !util.IsDNSLabel(name) {
return fmt.Errorf("Service creation requested, but an invalid name for a service was provided (%s). Service names must be valid DNS labels.", name)
}
ports, err := portsFromString(portSpec)
if err != nil {
return err
}
controller := &api.ReplicationController{
TypeMeta: api.TypeMeta{
ID: name,
},
DesiredState: api.ReplicationControllerState{
Replicas: replicas,
ReplicaSelector: map[string]string{
"simpleService": name,
},
PodTemplate: api.PodTemplate{
DesiredState: api.PodState{
Manifest: api.ContainerManifest{
Version: "v1beta2",
Containers: []api.Container{
{
Name: strings.ToLower(name),
Image: image,
Ports: ports,
},
},
},
},
Labels: map[string]string{
"simpleService": name,
},
},
},
}
controllerOut, err := client.CreateReplicationController(ctx, controller)
if err != nil {
return err
}
data, err := yaml.Marshal(controllerOut)
if err != nil {
return err
}
fmt.Print(string(data))
if servicePort > 0 {
svc, err := createService(ctx, name, servicePort, client)
if err != nil {
return err
}
data, err = yaml.Marshal(svc)
if err != nil {
return err
}
fmt.Printf(string(data))
}
return nil
}
func createService(ctx api.Context, name string, port int, client client.Interface) (*api.Service, error) {
svc := &api.Service{
TypeMeta: api.TypeMeta{ID: name},
Port: port,
Labels: map[string]string{
"simpleService": name,
},
Selector: map[string]string{
"simpleService": name,
},
}
svc, err := client.CreateService(ctx, svc)
return svc, err
}
// DeleteController deletes a replication controller named 'name', requires that the controller
// already be stopped.
func DeleteController(ctx api.Context, name string, client client.Interface) error {
controller, err := client.GetReplicationController(ctx, name)
if err != nil {
return err
}
if controller.DesiredState.Replicas != 0 {
return fmt.Errorf("controller has non-zero replicas (%d), please stop it first", controller.DesiredState.Replicas)
}
return client.DeleteReplicationController(ctx, name)
}