summaryrefslogtreecommitdiff
path: root/pkg/api/handlers/compat/images.go
blob: 4b7a2a71cea1ed3e8618d0d403b3aad32e1ee4a1 (plain)
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
package compat

import (
	"context"
	"encoding/json"
	"fmt"
	"io/ioutil"
	"net/http"
	"os"
	"strings"

	"github.com/containers/buildah"
	"github.com/containers/common/libimage"
	"github.com/containers/common/pkg/config"
	"github.com/containers/image/v5/manifest"
	"github.com/containers/image/v5/types"
	"github.com/containers/podman/v3/libpod"
	"github.com/containers/podman/v3/pkg/api/handlers"
	"github.com/containers/podman/v3/pkg/api/handlers/utils"
	"github.com/containers/podman/v3/pkg/auth"
	"github.com/containers/podman/v3/pkg/channel"
	"github.com/containers/podman/v3/pkg/domain/entities"
	"github.com/containers/podman/v3/pkg/domain/infra/abi"
	"github.com/containers/storage"
	"github.com/gorilla/schema"
	"github.com/opencontainers/go-digest"
	"github.com/pkg/errors"
	"github.com/sirupsen/logrus"
)

// mergeNameAndTagOrDigest creates an image reference as string from the
// provided image name and tagOrDigest which can be a tag, a digest or empty.
func mergeNameAndTagOrDigest(name, tagOrDigest string) string {
	if len(tagOrDigest) == 0 {
		return name
	}

	separator := ":" // default to tag
	if _, err := digest.Parse(tagOrDigest); err == nil {
		// We have a digest, so let's change the separator.
		separator = "@"
	}
	return fmt.Sprintf("%s%s%s", name, separator, tagOrDigest)
}

func ExportImage(w http.ResponseWriter, r *http.Request) {
	// 200 ok
	// 500 server
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	tmpfile, err := ioutil.TempFile("", "api.tar")
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
		return
	}
	defer os.Remove(tmpfile.Name())

	name := utils.GetName(r)
	imageEngine := abi.ImageEngine{Libpod: runtime}

	saveOptions := entities.ImageSaveOptions{
		Format: "docker-archive",
		Output: tmpfile.Name(),
	}

	if err := imageEngine.Save(r.Context(), name, nil, saveOptions); err != nil {
		if errors.Cause(err) == storage.ErrImageUnknown {
			utils.ImageNotFound(w, name, errors.Wrapf(err, "failed to find image %s", name))
			return
		}
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
		return
	}

	if err := tmpfile.Close(); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to close tempfile"))
		return
	}

	rdr, err := os.Open(tmpfile.Name())
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to read the exported tarfile"))
		return
	}
	defer rdr.Close()
	utils.WriteResponse(w, http.StatusOK, rdr)
}

func CommitContainer(w http.ResponseWriter, r *http.Request) {
	var (
		destImage string
	)
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		Author    string `schema:"author"`
		Changes   string `schema:"changes"`
		Comment   string `schema:"comment"`
		Container string `schema:"container"`
		// fromSrc   string  # fromSrc is currently unused
		Pause bool   `schema:"pause"`
		Repo  string `schema:"repo"`
		Tag   string `schema:"tag"`
	}{
		// This is where you can override the golang default value for one of fields
	}

	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}
	rtc, err := runtime.GetConfig()
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "Decode()"))
		return
	}
	sc := runtime.SystemContext()
	tag := "latest"
	options := libpod.ContainerCommitOptions{
		Pause: true,
	}
	options.CommitOptions = buildah.CommitOptions{
		SignaturePolicyPath:   rtc.Engine.SignaturePolicyPath,
		ReportWriter:          os.Stderr,
		SystemContext:         sc,
		PreferredManifestType: manifest.DockerV2Schema2MediaType,
	}

	input := handlers.CreateContainerConfig{}
	if err := json.NewDecoder(r.Body).Decode(&input); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "Decode()"))
		return
	}

	if len(query.Tag) > 0 {
		tag = query.Tag
	}
	options.Message = query.Comment
	options.Author = query.Author
	options.Pause = query.Pause
	options.Changes = strings.Fields(query.Changes)
	ctr, err := runtime.LookupContainer(query.Container)
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusNotFound, err)
		return
	}

	// I know mitr hates this ... but doing for now
	if len(query.Repo) > 1 {
		destImage = fmt.Sprintf("%s:%s", query.Repo, tag)
	}

	commitImage, err := ctr.Commit(r.Context(), destImage, options)
	if err != nil && !strings.Contains(err.Error(), "is not running") {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrapf(err, "CommitFailure"))
		return
	}
	utils.WriteResponse(w, http.StatusOK, handlers.IDResponse{ID: commitImage.ID()}) // nolint
}

func CreateImageFromSrc(w http.ResponseWriter, r *http.Request) {
	// 200 no error
	// 404 repo does not exist or no read access
	// 500 internal
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		FromSrc string   `schema:"fromSrc"`
		Changes []string `schema:"changes"`
	}{
		// This is where you can override the golang default value for one of fields
	}

	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}
	// fromSrc – Source to import. The value may be a URL from which the image can be retrieved or - to read the image from the request body. This parameter may only be used when importing an image.
	source := query.FromSrc
	if source == "-" {
		f, err := ioutil.TempFile("", "api_load.tar")
		if err != nil {
			utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to create tempfile"))
			return
		}
		source = f.Name()
		if err := SaveFromBody(f, r); err != nil {
			utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to write temporary file"))
		}
	}

	imageEngine := abi.ImageEngine{Libpod: runtime}
	report, err := imageEngine.Import(r.Context(), entities.ImageImportOptions{Source: source, Changes: query.Changes})
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to import tarball"))
		return
	}
	// Success
	utils.WriteResponse(w, http.StatusOK, struct {
		Status         string            `json:"status"`
		Progress       string            `json:"progress"`
		ProgressDetail map[string]string `json:"progressDetail"`
		Id             string            `json:"id"` // nolint
	}{
		Status:         report.Id,
		ProgressDetail: map[string]string{},
		Id:             report.Id,
	})
}

func CreateImageFromImage(w http.ResponseWriter, r *http.Request) {
	// 200 no error
	// 404 repo does not exist or no read access
	// 500 internal
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		FromImage string `schema:"fromImage"`
		Tag       string `schema:"tag"`
	}{
		// This is where you can override the golang default value for one of fields
	}

	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}

	fromImage := mergeNameAndTagOrDigest(query.FromImage, query.Tag)

	authConf, authfile, key, err := auth.GetCredentials(r)
	if err != nil {
		utils.Error(w, "failed to retrieve repository credentials", http.StatusBadRequest, errors.Wrapf(err, "failed to parse %q header for %s", key, r.URL.String()))
		return
	}
	defer auth.RemoveAuthfile(authfile)

	pullOptions := &libimage.PullOptions{}
	pullOptions.AuthFilePath = authfile
	if authConf != nil {
		pullOptions.Username = authConf.Username
		pullOptions.Password = authConf.Password
		pullOptions.IdentityToken = authConf.IdentityToken
	}
	pullOptions.Writer = os.Stderr // allows for debugging on the server

	stderr := channel.NewWriter(make(chan []byte))
	defer stderr.Close()

	progress := make(chan types.ProgressProperties)
	pullOptions.Progress = progress

	var img string
	runCtx, cancel := context.WithCancel(context.Background())
	go func() {
		defer cancel()
		pulledImages, err := runtime.LibimageRuntime().Pull(runCtx, fromImage, config.PullPolicyAlways, pullOptions)
		if err != nil {
			stderr.Write([]byte(err.Error() + "\n"))
		} else {
			if len(pulledImages) == 0 {
				utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.New("internal error: no images pulled"))
				return
			}
			img = pulledImages[0].ID()
		}
	}()

	flush := func() {
		if flusher, ok := w.(http.Flusher); ok {
			flusher.Flush()
		}
	}

	w.WriteHeader(http.StatusOK)
	w.Header().Add("Content-Type", "application/json")
	flush()

	enc := json.NewEncoder(w)
	enc.SetEscapeHTML(true)
	var failed bool

loop: // break out of for/select infinite loop
	for {
		var report struct {
			Stream   string `json:"stream,omitempty"`
			Status   string `json:"status,omitempty"`
			Progress struct {
				Current uint64 `json:"current,omitempty"`
				Total   int64  `json:"total,omitempty"`
			} `json:"progressDetail,omitempty"`
			Error string `json:"error,omitempty"`
			Id    string `json:"id,omitempty"` // nolint
		}

		select {
		case e := <-progress:
			switch e.Event {
			case types.ProgressEventNewArtifact:
				report.Status = "Pulling fs layer"
			case types.ProgressEventRead:
				report.Status = "Downloading"
				report.Progress.Current = e.Offset
				report.Progress.Total = e.Artifact.Size
			case types.ProgressEventSkipped:
				report.Status = "Already exists"
			case types.ProgressEventDone:
				report.Status = "Download complete"
			}
			report.Id = e.Artifact.Digest.Encoded()[0:12]
			if err := enc.Encode(report); err != nil {
				stderr.Write([]byte(err.Error()))
			}
			flush()
		case e := <-stderr.Chan():
			failed = true
			report.Error = string(e)
			if err := enc.Encode(report); err != nil {
				logrus.Warnf("Failed to json encode error %q", err.Error())
			}
			flush()
		case <-runCtx.Done():
			if !failed {
				report.Status = "Pull complete"
				report.Id = img[0:12]
				if err := enc.Encode(report); err != nil {
					logrus.Warnf("Failed to json encode error %q", err.Error())
				}
				flush()
			}
			break loop // break out of for/select infinite loop
		case <-r.Context().Done():
			// Client has closed connection
			break loop // break out of for/select infinite loop
		}
	}
}

func GetImage(w http.ResponseWriter, r *http.Request) {
	// 200 no error
	// 404 no such
	// 500 internal
	name := utils.GetName(r)
	newImage, err := utils.GetImage(r, name)
	if err != nil {
		// Here we need to fiddle with the error message because docker-py is looking for "No
		// such image" to determine on how to raise the correct exception.
		errMsg := strings.ReplaceAll(err.Error(), "image not known", "No such image")
		utils.Error(w, "Something went wrong.", http.StatusNotFound, errors.Errorf("failed to find image %s: %s", name, errMsg))
		return
	}
	inspect, err := handlers.ImageDataToImageInspect(r.Context(), newImage)
	if err != nil {
		utils.Error(w, "Server error", http.StatusInternalServerError, errors.Wrapf(err, "failed to convert ImageData to ImageInspect '%s'", inspect.ID))
		return
	}
	utils.WriteResponse(w, http.StatusOK, inspect)
}

func GetImages(w http.ResponseWriter, r *http.Request) {
	images, err := utils.GetImages(w, r)
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "Failed get images"))
		return
	}
	var summaries = make([]*entities.ImageSummary, len(images))
	for j, img := range images {
		is, err := handlers.ImageToImageSummary(img)
		if err != nil {
			utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "Failed transform image summaries"))
			return
		}
		summaries[j] = is
	}
	utils.WriteResponse(w, http.StatusOK, summaries)
}

func LoadImages(w http.ResponseWriter, r *http.Request) {
	// TODO this is basically wrong
	// TODO ... improve these ^ messages to something useful
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		Changes map[string]string `json:"changes"` // Ignored
		Message string            `json:"message"` // Ignored
		Quiet   bool              `json:"quiet"`   // Ignored
	}{
		// This is where you can override the golang default value for one of fields
	}

	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}

	// First write the body to a temporary file that we can later attempt
	// to load.
	f, err := ioutil.TempFile("", "api_load.tar")
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to create tempfile"))
		return
	}
	defer func() {
		err := os.Remove(f.Name())
		if err != nil {
			logrus.Errorf("Failed to remove temporary file: %v.", err)
		}
	}()
	if err := SaveFromBody(f, r); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to write temporary file"))
		return
	}

	imageEngine := abi.ImageEngine{Libpod: runtime}

	loadOptions := entities.ImageLoadOptions{Input: f.Name()}
	loadReport, err := imageEngine.Load(r.Context(), loadOptions)
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to load image"))
		return
	}

	if len(loadReport.Names) != 1 {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Errorf("%d instead of 1 were loaded", len(loadReport.Names)))
		return
	}

	utils.WriteResponse(w, http.StatusOK, struct {
		Stream string `json:"stream"`
	}{
		Stream: fmt.Sprintf("Loaded image: %s\n", loadReport.Names[0]),
	})
}

func ExportImages(w http.ResponseWriter, r *http.Request) {
	// 200 OK
	// 500 Error
	decoder := r.Context().Value("decoder").(*schema.Decoder)
	runtime := r.Context().Value("runtime").(*libpod.Runtime)

	query := struct {
		Names []string `schema:"names"`
	}{
		// This is where you can override the golang default value for one of fields
	}
	if err := decoder.Decode(&query, r.URL.Query()); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, errors.Wrapf(err, "failed to parse parameters for %s", r.URL.String()))
		return
	}
	if len(query.Names) <= 0 {
		utils.Error(w, "Something went wrong.", http.StatusBadRequest, fmt.Errorf("no images to download"))
		return
	}
	if len(query.Names) > 1 {
		utils.Error(w, "Something went wrong.", http.StatusNotImplemented, fmt.Errorf("getting multiple image is not supported yet"))
		return
	}

	images := query.Names
	tmpfile, err := ioutil.TempFile("", "api.tar")
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to create tempfile"))
		return
	}
	defer os.Remove(tmpfile.Name())
	if err := tmpfile.Close(); err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "unable to close tempfile"))
		return
	}

	imageEngine := abi.ImageEngine{Libpod: runtime}

	saveOptions := entities.ImageSaveOptions{Format: "docker-archive", Output: tmpfile.Name()}
	if err := imageEngine.Save(r.Context(), images[0], images[1:], saveOptions); err != nil {
		utils.InternalServerError(w, err)
		return
	}

	rdr, err := os.Open(tmpfile.Name())
	if err != nil {
		utils.Error(w, "Something went wrong.", http.StatusInternalServerError, errors.Wrap(err, "failed to read the exported tarfile"))
		return
	}
	defer rdr.Close()
	utils.WriteResponse(w, http.StatusOK, rdr)
}