forked from kubernetes/kubernetes
-
Notifications
You must be signed in to change notification settings - Fork 1
/
kubecfg.go
528 lines (478 loc) · 16.2 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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
/*
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 main
import (
"flag"
"fmt"
"io/ioutil"
"net/http"
"os"
"reflect"
"sort"
"strconv"
"strings"
"time"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/latest"
"github.com/GoogleCloudPlatform/kubernetes/pkg/api/meta"
"github.com/GoogleCloudPlatform/kubernetes/pkg/client"
"github.com/GoogleCloudPlatform/kubernetes/pkg/kubecfg"
"github.com/GoogleCloudPlatform/kubernetes/pkg/runtime"
"github.com/GoogleCloudPlatform/kubernetes/pkg/util"
"github.com/GoogleCloudPlatform/kubernetes/pkg/version"
"github.com/GoogleCloudPlatform/kubernetes/pkg/version/verflag"
"github.com/golang/glog"
"github.com/skratchdot/open-golang/open"
)
var (
serverVersion = verflag.Version("server_version", verflag.VersionFalse, "Print the server's version information and quit")
preventSkew = flag.Bool("expect_version_match", false, "Fail if server's version doesn't match own version.")
config = flag.String("c", "", "Path or URL to the config file, or '-' to read from STDIN")
selector = flag.String("l", "", "Selector (label query) to use for listing")
fieldSelector = flag.String("fields", "", "Selector (field query) to use for listing")
updatePeriod = flag.Duration("u", 60*time.Second, "Update interval period")
portSpec = flag.String("p", "", "The port spec, comma-separated list of <external>:<internal>,...")
servicePort = flag.Int("s", -1, "If positive, create and run a corresponding service on this port, only used with 'run'")
authConfig = flag.String("auth", os.Getenv("HOME")+"/.kubernetes_auth", "Path to the auth info file. If missing, prompt the user. Only used if doing https.")
json = flag.Bool("json", false, "If true, print raw JSON for responses")
yaml = flag.Bool("yaml", false, "If true, print raw YAML for responses")
verbose = flag.Bool("verbose", false, "If true, print extra information")
validate = flag.Bool("validate", false, "If true, try to validate the passed in object using a swagger schema on the api server")
proxy = flag.Bool("proxy", false, "If true, run a proxy to the api server")
www = flag.String("www", "", "If -proxy is true, use this directory to serve static files")
templateFile = flag.String("template_file", "", "If present, load this file as a golang template and use it for output printing")
templateStr = flag.String("template", "", "If present, parse this string as a golang template and use it for output printing")
imageName = flag.String("image", "", "Image used when updating a replicationController. Will apply to the first container in the pod template.")
clientConfig = &client.Config{}
openBrowser = flag.Bool("open_browser", true, "If true, and -proxy is specified, open a browser pointed at the Kubernetes UX. Default true.")
ns = flag.String("ns", "", "If present, the namespace scope for this request.")
nsFile = flag.String("ns_file", os.Getenv("HOME")+"/.kubernetes_ns", "Path to the namespace file")
)
func init() {
flag.StringVar(&clientConfig.Host, "h", "", "The host to connect to.")
flag.StringVar(&clientConfig.Version, "api_version", latest.Version, "The version of the API to use against this server.")
flag.StringVar(&clientConfig.CAFile, "certificate_authority", "", "Path to a cert. file for the certificate authority")
flag.StringVar(&clientConfig.CertFile, "client_certificate", "", "Path to a client certificate for TLS.")
flag.StringVar(&clientConfig.KeyFile, "client_key", "", "Path to a client key file for TLS.")
flag.BoolVar(&clientConfig.Insecure, "insecure_skip_tls_verify", clientConfig.Insecure, "If true, the server's certificate will not be checked for validity. This will make your HTTPS connections insecure.")
}
var parser = kubecfg.NewParser(map[string]runtime.Object{
"pods": &api.Pod{},
"services": &api.Service{},
"replicationControllers": &api.ReplicationController{},
"minions": &api.Node{},
"nodes": &api.Node{},
"events": &api.Event{},
})
func usage() {
fmt.Fprintf(os.Stderr, `Usage: kubecfg -h [-c config/file.json|url|-] <method>
Kubernetes REST API:
kubecfg [OPTIONS] get|list|create|delete|update <%s>[/<id>]
Manage replication controllers:
kubecfg [OPTIONS] stop|rm <controller>
kubecfg [OPTIONS] [-u <time>] [-image <image>] rollingupdate <controller>
kubecfg [OPTIONS] resize <controller> <replicas>
Launch a simple ReplicationController with a single container based
on the given image:
kubecfg [OPTIONS] [-p <port spec>] run <image> <replicas> <controller>
Manage namespace:
kubecfg [OPTIONS] ns [<namespace>]
Options:
`, prettyWireStorage())
flag.PrintDefaults()
}
func prettyWireStorage() string {
types := parser.SupportedWireStorage()
sort.Strings(types)
return strings.Join(types, "|")
}
// readConfigData reads the bytes from the specified filesytem or network location associated with the *config flag
func readConfigData() []byte {
// read from STDIN
if *config == "-" {
data, err := ioutil.ReadAll(os.Stdin)
if err != nil {
glog.Fatalf("Unable to read from STDIN: %v\n", err)
}
return data
}
// we look for http:// or https:// to determine if valid URL, otherwise do normal file IO
if strings.Index(*config, "http://") == 0 || strings.Index(*config, "https://") == 0 {
resp, err := http.Get(*config)
if err != nil {
glog.Fatalf("Unable to access URL %v: %v\n", *config, err)
}
defer resp.Body.Close()
if resp.StatusCode != 200 {
glog.Fatalf("Unable to read URL, server reported %d %s", resp.StatusCode, resp.Status)
}
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
glog.Fatalf("Unable to read URL %v: %v\n", *config, err)
}
return data
}
data, err := ioutil.ReadFile(*config)
if err != nil {
glog.Fatalf("Unable to read %v: %v\n", *config, err)
}
return data
}
// readConfig reads and parses pod, replicationController, and service
// configuration files. If any errors log and exit non-zero.
func readConfig(storage string, c *client.Client) []byte {
serverCodec := c.RESTClient.Codec
if len(*config) == 0 {
glog.Fatal("Need config file (-c)")
}
dataInput := readConfigData()
if *validate {
err := kubecfg.ValidateObject(dataInput, c)
if err != nil {
glog.Fatalf("Error validating %v as an object for %v: %v\n", *config, storage, err)
}
}
data, err := parser.ToWireFormat(dataInput, storage, latest.Codec, serverCodec)
if err != nil {
glog.Fatalf("Error parsing %v as an object for %v: %v\n", *config, storage, err)
}
if *verbose {
glog.Infof("Parsed config file successfully; sending:\n%v\n", string(data))
}
return data
}
func main() {
flag.Usage = func() {
usage()
}
flag.Parse()
util.InitLogs()
defer util.FlushLogs()
verflag.PrintAndExitIfRequested()
// Initialize the client
if clientConfig.Host == "" {
clientConfig.Host = os.Getenv("KUBERNETES_MASTER")
}
// Load namespace information for requests
// Check if the namespace was overriden by the -ns argument
ctx := api.NewDefaultContext()
if len(*ns) > 0 {
ctx = api.WithNamespace(ctx, *ns)
} else {
nsInfo, err := kubecfg.LoadNamespaceInfo(*nsFile)
if err != nil {
glog.Fatalf("Error loading current namespace: %v", err)
}
ctx = api.WithNamespace(ctx, nsInfo.Namespace)
}
if clientConfig.Host == "" {
// TODO: eventually apiserver should start on 443 and be secure by default
// TODO: don't specify http or https in Host, and infer that from auth options.
clientConfig.Host = "http://localhost:8080"
}
if client.IsConfigTransportTLS(clientConfig) {
auth, err := kubecfg.LoadClientAuthInfoOrPrompt(*authConfig, os.Stdin)
if err != nil {
glog.Fatalf("Error loading auth: %v", err)
}
clientConfig.Username = auth.User
clientConfig.Password = auth.Password
if auth.CAFile != "" {
clientConfig.CAFile = auth.CAFile
}
if auth.CertFile != "" {
clientConfig.CertFile = auth.CertFile
}
if auth.KeyFile != "" {
clientConfig.KeyFile = auth.KeyFile
}
if auth.BearerToken != "" {
clientConfig.BearerToken = auth.BearerToken
}
if auth.Insecure != nil {
clientConfig.Insecure = *auth.Insecure
}
}
kubeClient, err := client.New(clientConfig)
if err != nil {
glog.Fatalf("Can't configure client: %v", err)
}
if *serverVersion != verflag.VersionFalse {
got, err := kubeClient.ServerVersion()
if err != nil {
fmt.Printf("Couldn't read version from server: %v\n", err)
os.Exit(1)
}
if *serverVersion == verflag.VersionRaw {
fmt.Printf("%#v\n", *got)
os.Exit(0)
} else {
fmt.Printf("Server: Kubernetes %s\n", got)
os.Exit(0)
}
}
if *preventSkew {
got, err := kubeClient.ServerVersion()
if err != nil {
fmt.Printf("Couldn't read version from server: %v\n", err)
os.Exit(1)
}
if c, s := version.Get(), *got; !reflect.DeepEqual(c, s) {
fmt.Printf("Server version (%#v) differs from client version (%#v)!\n", s, c)
os.Exit(1)
}
}
if *proxy {
glog.Info("Starting to serve on localhost:8001")
if *openBrowser {
go func() {
time.Sleep(2 * time.Second)
open.Start("http://localhost:8001/static/")
}()
}
server, err := kubecfg.NewProxyServer(*www, clientConfig)
if err != nil {
glog.Fatalf("Error creating proxy server: %v", err)
}
glog.Fatal(server.Serve())
}
if len(flag.Args()) < 1 {
usage()
os.Exit(1)
}
method := flag.Arg(0)
matchFound := executeAPIRequest(ctx, method, kubeClient) || executeControllerRequest(ctx, method, kubeClient) || executeNamespaceRequest(method, kubeClient)
if matchFound == false {
glog.Fatalf("Unknown command %s", method)
}
}
// storagePathFromArg normalizes a path and breaks out the first segment if available
func storagePathFromArg(arg string) (storage, path string, hasSuffix bool) {
path = strings.Trim(arg, "/")
segments := strings.SplitN(path, "/", 2)
storage = segments[0]
if len(segments) > 1 && segments[1] != "" {
hasSuffix = true
}
return storage, path, hasSuffix
}
//checkStorage returns true if the provided storage is valid
func checkStorage(storage string) bool {
for _, allowed := range parser.SupportedWireStorage() {
if allowed == storage {
return true
}
}
return false
}
func getPrinter() kubecfg.ResourcePrinter {
var printer kubecfg.ResourcePrinter
switch {
case *json:
printer = &kubecfg.IdentityPrinter{}
case *yaml:
printer = &kubecfg.YAMLPrinter{}
case len(*templateFile) > 0 || len(*templateStr) > 0:
var data []byte
if len(*templateFile) > 0 {
var err error
data, err = ioutil.ReadFile(*templateFile)
if err != nil {
glog.Fatalf("Error reading template %s, %v\n", *templateFile, err)
return nil
}
} else {
data = []byte(*templateStr)
}
var err error
printer, err = kubecfg.NewTemplatePrinter(data)
if err != nil {
glog.Fatalf("Error '%v' parsing template:\n'%s'", err, string(data))
return nil
}
default:
printer = humanReadablePrinter()
}
return printer
}
func executeAPIRequest(ctx api.Context, method string, c *client.Client) bool {
storage, path, hasSuffix := storagePathFromArg(flag.Arg(1))
validStorage := checkStorage(storage)
verb := ""
setBody := false
var version string
printer := getPrinter()
switch method {
case "get":
verb = "GET"
if !validStorage || !hasSuffix {
glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>[/<id>]", method, prettyWireStorage())
}
case "list":
verb = "GET"
if !validStorage || hasSuffix {
glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>", method, prettyWireStorage())
}
case "delete":
verb = "DELETE"
if !validStorage || !hasSuffix {
glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>/<id>", method, prettyWireStorage())
}
case "create":
verb = "POST"
setBody = true
if !validStorage || hasSuffix {
glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>", method, prettyWireStorage())
}
case "update":
obj, err := c.Verb("GET").Namespace(api.Namespace(ctx)).Suffix(path).Do().Get()
if err != nil {
glog.Fatalf("error obtaining resource version for update: %v", err)
}
meta, err := meta.Accessor(obj)
if err != nil {
glog.Fatalf("error finding json base for update: %v", err)
}
version = meta.ResourceVersion()
verb = "PUT"
setBody = true
if !validStorage || !hasSuffix {
glog.Fatalf("usage: kubecfg [OPTIONS] %s <%s>/<id>", method, prettyWireStorage())
}
case "print":
data := readConfig(storage, c)
obj, err := latest.Codec.Decode(data)
if err != nil {
glog.Fatalf("error setting resource version: %v", err)
}
printer.PrintObj(obj, os.Stdout)
return true
default:
return false
}
r := c.Verb(verb).Namespace(api.Namespace(ctx)).Suffix(path)
if len(*selector) > 0 {
r.ParseSelectorParam("labels", *selector)
}
if len(*fieldSelector) > 0 {
r.ParseSelectorParam("fields", *fieldSelector)
}
if setBody {
if len(version) > 0 {
data := readConfig(storage, c)
obj, err := latest.Codec.Decode(data)
if err != nil {
glog.Fatalf("error setting resource version: %v", err)
}
jsonBase, err := meta.Accessor(obj)
if err != nil {
glog.Fatalf("error setting resource version: %v", err)
}
jsonBase.SetResourceVersion(version)
data, err = c.RESTClient.Codec.Encode(obj)
if err != nil {
glog.Fatalf("error setting resource version: %v", err)
}
r.Body(data)
} else {
r.Body(readConfig(storage, c))
}
}
result := r.Do()
obj, err := result.Get()
if err != nil {
glog.Fatalf("Got request error: %v\n", err)
return false
}
if err = printer.PrintObj(obj, os.Stdout); err != nil {
body, _ := result.Raw()
glog.Fatalf("Failed to print: %v\nRaw received object:\n%#v\n\nBody received: %v", err, obj, string(body))
}
fmt.Print("\n")
return true
}
func executeControllerRequest(ctx api.Context, method string, c *client.Client) bool {
parseController := func() string {
if len(flag.Args()) != 2 {
glog.Fatal("usage: kubecfg [OPTIONS] stop|rm|rollingupdate <controller>")
}
return flag.Arg(1)
}
var err error
switch method {
case "stop":
err = kubecfg.StopController(ctx, parseController(), c)
case "rm":
err = kubecfg.DeleteController(ctx, parseController(), c)
case "rollingupdate":
err = kubecfg.Update(ctx, parseController(), c, *updatePeriod, *imageName)
case "run":
if len(flag.Args()) != 4 {
glog.Fatal("usage: kubecfg [OPTIONS] run <image> <replicas> <controller>")
}
image := flag.Arg(1)
replicas, err2 := strconv.Atoi(flag.Arg(2))
if err2 != nil {
glog.Fatalf("Error parsing replicas: %v", err2)
}
name := flag.Arg(3)
err = kubecfg.RunController(ctx, image, name, replicas, c, *portSpec, *servicePort)
case "resize":
args := flag.Args()
if len(args) < 3 {
glog.Fatal("usage: kubecfg resize <controller> <replicas>")
}
name := args[1]
replicas, err2 := strconv.Atoi(args[2])
if err2 != nil {
glog.Fatalf("Error parsing replicas: %v", err2)
}
err = kubecfg.ResizeController(ctx, name, replicas, c)
default:
return false
}
if err != nil {
glog.Fatalf("Error: %v", err)
}
return true
}
// executeNamespaceRequest handles client operations for namespaces
func executeNamespaceRequest(method string, c *client.Client) bool {
var err error
var ns *kubecfg.NamespaceInfo
switch method {
case "ns":
args := flag.Args()
switch len(args) {
case 1:
ns, err = kubecfg.LoadNamespaceInfo(*nsFile)
case 2:
ns = &kubecfg.NamespaceInfo{Namespace: args[1]}
err = kubecfg.SaveNamespaceInfo(*nsFile, ns)
default:
glog.Fatalf("usage: kubecfg ns [<namespace>]")
}
default:
return false
}
if err != nil {
glog.Fatalf("Error: %v", err)
}
fmt.Printf("Using namespace %s\n", ns.Namespace)
return true
}
func humanReadablePrinter() *kubecfg.HumanReadablePrinter {
printer := kubecfg.NewHumanReadablePrinter()
// Add Handler calls here to support additional types
return printer
}