root / docs / examplesdir / imageregister.rst @ 023d5ada
History | View | Annotate | Download (16.8 kB)
1 |
Image registration |
---|---|
2 |
================== |
3 |
|
4 |
In Synnefo, an image is loaded as a file to the storage service (Pithos+), and |
5 |
then is registered to the image service (Plankton). The image location at the |
6 |
storage server is unique in each a deployment and also a key for identifying |
7 |
the image. |
8 |
|
9 |
The image location format at user level:: |
10 |
|
11 |
pithos://<user_uuid>/<container>/<object path> |
12 |
|
13 |
e.g., pithos://my-u53r-1d/images/debian_base3.diskdump |
14 |
|
15 |
In **file** and **container** contexts, users may also use the shortcut: |
16 |
|
17 |
/<container>/<object path> |
18 |
|
19 |
e.g., /images/debian_base3.diskdump |
20 |
|
21 |
|
22 |
Register an image |
23 |
----------------- |
24 |
|
25 |
Let the image file `debian_base3.diskdump` be a debian image located at the |
26 |
current local directory. |
27 |
|
28 |
Upload the image to container `images` |
29 |
|
30 |
.. code-block:: console |
31 |
|
32 |
$ kamaki file upload debian_base3.diskdump /images |
33 |
|
34 |
Register the image object with the name 'Debian Base Alpha' |
35 |
|
36 |
.. code-block:: console |
37 |
|
38 |
kamaki image register --name 'Debian Base Alpha' --location=/images/debian_base3.diskdump |
39 |
checksum: 3cb03556ec971f...e8dd6190443b560cb7 |
40 |
container-format: bare |
41 |
created-at: 2013-06-19 08:00:22 |
42 |
deleted-at: |
43 |
disk-format: diskdump |
44 |
id: 7h1rd-1m4g3-1d |
45 |
is-public: False |
46 |
location: pithos://s0m3-u53r-1d/images/debian_base3.diskdump |
47 |
name: Debian Base Alpha |
48 |
owner: s0m3-u53r-1d |
49 |
properties: |
50 |
size: 903471104 |
51 |
status: available |
52 |
updated-at: 2013-06-19 08:01:00 |
53 |
Metadata file uploaded as /images/debian_base3.diskdump.meta (version 1352) |
54 |
|
55 |
.. warning:: The image created by the above command will not be able to create |
56 |
a working virtual server, although the registration will be successful. In |
57 |
the synnefo universe, an image has to be registered along with some |
58 |
`properties <http://www.synnefo.org/docs/snf-image/latest/usage.html#image-properties>`_. |
59 |
|
60 |
.. note:: The `image register` command automatically creates a meta file and |
61 |
uploads it to the same location as the image. The meta file can be |
62 |
downloaded and reused for more image registrations. |
63 |
|
64 |
Here is another way to perform the two operations above: **/image register** |
65 |
with the **\- -upload-image-file** argument. This single operation will upload |
66 |
the image file and then register it as an image, and is equivalent to |
67 |
sequentially calling **/file upload** and **/image register**. |
68 |
|
69 |
<<<<<<< HEAD:docs/collection_of_examples/imageregister.rst |
70 |
In other words, the example that follows is equivalent to calling the two |
71 |
operations above. |
72 |
======= |
73 |
In other words, the preceding and following command sequences are equivalent. |
74 |
>>>>>>> release-0.11:docs/examplesdir/imageregister.rst |
75 |
|
76 |
.. code-block:: console |
77 |
|
78 |
kamaki image register --name='Debian Base Alpha' |
79 |
--location=/images/debian_base3.diskdump |
80 |
--upload-image-file=debian_base3.diskdump |
81 |
|
82 |
|
83 |
Read the metafile |
84 |
|
85 |
.. code-block:: console |
86 |
|
87 |
kamaki file cat /images/debian_base3.diskdump.meta |
88 |
{ |
89 |
"status": "available", |
90 |
"name": "Debian Base Gama", |
91 |
"checksum": "3cb03556ec971f...e8dd6190443b560cb7", |
92 |
"id": "7h1rd-1m4g3-1d2", |
93 |
"updated-at": "2013-06-19 08:01:00", |
94 |
"created-at": "2013-06-19 08:00:22", |
95 |
"properties": {}, |
96 |
"location": "pithos://s0m3-u53r-1d/images/debian_base3.diskdump", |
97 |
"is-public": "False", |
98 |
"owner": "s0m3-u53r-1d", |
99 |
"disk-format": "diskdump", |
100 |
"size": "903471104", |
101 |
"deleted-at": "", |
102 |
"container-format": "bare" |
103 |
} |
104 |
|
105 |
Images registered by me |
106 |
----------------------- |
107 |
|
108 |
List all images, then list only images owned by the user with id s0m3-u53r-1d |
109 |
|
110 |
.. code-block:: console |
111 |
|
112 |
kamaki image list |
113 |
f1r57-1m4g3-1d Debian Base Alpha |
114 |
container_format: bare |
115 |
disk_format: diskdump |
116 |
size: 474066944 |
117 |
status: available |
118 |
53c0nd-1m4g3-1d Beta Debian Base |
119 |
container_format: bare |
120 |
disk_format: diskdump |
121 |
size: 474066944 |
122 |
status: available |
123 |
7h1rd-1m4g3-1d Debian Base Gama |
124 |
container_format: bare |
125 |
disk_format: diskdump |
126 |
size: 474066944 |
127 |
status: available |
128 |
kamaki image list --owner=s0m3-u53r-1d |
129 |
7h1rd-1m4g3-1d Debian Base Gama |
130 |
container_format: bare |
131 |
disk_format: diskdump |
132 |
size: 474066944 |
133 |
status: available |
134 |
|
135 |
.. note:: To get the current user id, use `kamaki user info` |
136 |
|
137 |
Unregister an image |
138 |
------------------- |
139 |
|
140 |
An image can be unregistered by its image id, but only if the current user is |
141 |
also the image owner. In this example, there is only one image owned by current |
142 |
user. |
143 |
|
144 |
Unregister image owned by current user |
145 |
|
146 |
.. code-block:: console |
147 |
|
148 |
kamaki image unregister 7h1rd-1m4g3-1d |
149 |
|
150 |
Check if the image is deleted |
151 |
|
152 |
.. code-block:: console |
153 |
|
154 |
kamaki image list --owner=s0m3-u53r-1d |
155 |
|
156 |
Attempt to unregister an image of another user |
157 |
|
158 |
.. code-block:: console |
159 |
|
160 |
kamaki image unregister f1r57-1m4g3-1d |
161 |
(403) FORBIDDEN forbidden () |
162 |
|
163 |
Register with properties |
164 |
------------------------ |
165 |
|
166 |
.. warning:: A succesfully registered image will not be functional, if the |
167 |
image properties are not defined correctly. Read the |
168 |
`documentation <http://www.synnefo.org/docs/snf-image/latest/usage.html#image-properties>`_ |
169 |
for more information. |
170 |
|
171 |
The image will be registered again, but with some custom properties:: |
172 |
|
173 |
OSFAMILY: linux |
174 |
USER: someuser |
175 |
|
176 |
In theory, these properties can be added freely by the user, and they are not |
177 |
required by the image server. In practice, some properties are absolutely |
178 |
vital for an image to be useful, although not necessary for registration. |
179 |
An attempt to register an image with custom properties: |
180 |
|
181 |
.. code-block:: console |
182 |
|
183 |
kamaki image register --name='Debian Base Gama' --location=/images/debian_base3.diskdump -p OS=linux -p user=someuser |
184 |
Metadata file /images/debian_base3.diskdump.meta already exists |
185 |
|
186 |
It's true that a metafile with this name is already there, but we can override |
187 |
it (**-f**) |
188 |
|
189 |
.. code-block:: console |
190 |
|
191 |
kamaki image register -f --name='Debian Base Gama' --location=/images/debian_base3.diskdump -p OS=linux -p user=someuser |
192 |
|
193 |
Register with a meta file |
194 |
------------------------- |
195 |
|
196 |
Download the meta file of the image (it was uploaded recently) |
197 |
|
198 |
.. code-block:: console |
199 |
|
200 |
kamaki file download /images/debian_base3.diskdump.meta |
201 |
Downloading /images/debian_base3.diskdump.meta --> /home/someuser/debian_base3.diskdump.meta |
202 |
Done |
203 |
|
204 |
The metadata file can be edited. Let's edit the file to add these properties:: |
205 |
|
206 |
OS: linux |
207 |
USER: root |
208 |
|
209 |
The resulting file will look like this: |
210 |
|
211 |
.. code-block:: javascript |
212 |
|
213 |
{ |
214 |
"status": "available", |
215 |
"name": "Debian Base Gama", |
216 |
"checksum": "3cb03556ec971f...e8dd6190443b560cb7", |
217 |
"id": "7h1rd-1m4g3-1d2", |
218 |
"updated-at": "2013-06-19 08:01:00", |
219 |
"created-at": "2013-06-19 08:00:22", |
220 |
"properties": { |
221 |
"OS": "linux", |
222 |
"USER": "root" |
223 |
}, |
224 |
"location": "pithos://s0m3-u53r-1d/images/debian_base3.diskdump", |
225 |
"is-public": "False", |
226 |
"owner": "s0m3-u53r-1d", |
227 |
"disk-format": "diskdump", |
228 |
"size": "903471104", |
229 |
"deleted-at": "", |
230 |
"container-format": "bare" |
231 |
} |
232 |
|
233 |
.. warning:: make sure the file is in a valid json format, otherwise image |
234 |
register will fail |
235 |
|
236 |
In the following registration, the image name will change to a new one. |
237 |
|
238 |
Register the image (don't forget the -f parameter, to override the metafile). |
239 |
|
240 |
.. code-block:: console |
241 |
|
242 |
kamaki image register -f --name='Debian Base Delta' --location=/images/debian_base3.diskdump --metafile=debian_base3.diskdump.meta |
243 |
checksum: 3cb03556ec971f...e8dd6190443b560cb7 |
244 |
container-format: bare |
245 |
created-at: 2013-06-19 08:00:22 |
246 |
deleted-at: |
247 |
disk-format: diskdump |
248 |
id: 7h1rd-1m4g3-1d |
249 |
is-public: False |
250 |
location: pithos://s0m3-u53r-1d/images/debian_base3.diskdump |
251 |
name: Debian Base Delta |
252 |
owner: s0m3-u53r-1d |
253 |
properties: |
254 |
OS: linux |
255 |
USER: root |
256 |
size: 903471104 |
257 |
status: available |
258 |
updated-at: 2013-06-19 08:01:00 |
259 |
Metadata file uploaded as /images/debian_base3.diskdump.meta (version 1359) |
260 |
|
261 |
Metadata and Property modification |
262 |
---------------------------------- |
263 |
|
264 |
According to the OpenStack terminology, the terms **metadata** and |
265 |
**properties** are two different thinks, if we talk about images. **Metadata** |
266 |
are all kinds of named metadata on an image. Some of them are assigned by the |
267 |
system, some others are custom and set by the users who register the image. |
268 |
These custom **metadata** are called **properties**. |
269 |
|
270 |
Image **metadata** and custom **properties** can be modified even after the |
271 |
image is registered. Metadata are fixed image attributes, like name, disk |
272 |
format etc. while custom properties are set by the image owner and, usually, |
273 |
refer to attributes of the images OS. |
274 |
|
275 |
Let's rename the image: |
276 |
|
277 |
.. code-block:: console |
278 |
|
279 |
kamaki image modify 7h1rd-1m4g3-1d --name='Changed Name' |
280 |
|
281 |
A look at the image metadata reveals that the name is changed: |
282 |
|
283 |
.. code-block:: console |
284 |
|
285 |
kamaki image info 7h1rd-1m4g3-1d |
286 |
checksum: 3cb03556ec971f...e8dd6190443b560cb7 |
287 |
container-format: bare |
288 |
created-at: 2013-06-19 08:00:22 |
289 |
deleted-at: |
290 |
disk-format: diskdump |
291 |
id: 7h1rd-1m4g3-1d |
292 |
is-public: False |
293 |
location: pithos://s0m3-u53r-1d/images/debian_base3.diskdump |
294 |
name: Changed Name |
295 |
owner: s0m3-u53r-1d |
296 |
properties: |
297 |
OS: linux |
298 |
USER: root |
299 |
size: 903471104 |
300 |
status: available |
301 |
updated-at: 2013-06-19 08:01:00 |
302 |
kamaki |
303 |
|
304 |
We can use the same idea to change the values of other metadata like disk |
305 |
format, container format or status. On the other hand, we cannot modify the |
306 |
id, owner, location, checksum and dates. e.g., to make an image public or |
307 |
private: |
308 |
|
309 |
.. code-block:: console |
310 |
|
311 |
kamaki image modify 7h1rd-1m4g3-1d --public --name='Debian Base Gama' |
312 |
kamaki image modify 7h1rd-1m4g3-1d --private |
313 |
|
314 |
The first call publishes the image (set is-public to True) and also restores |
315 |
the name to "Debian Base Gama". The second one unpublishes the image (set |
316 |
is-public to False). |
317 |
|
318 |
These operations can be used for properties with the same semantics: |
319 |
|
320 |
.. code-block:: console |
321 |
|
322 |
kamaki image modify 7h1rd-1m4g3-1d -p user=user |
323 |
kamaki image info 7h1rd-1m4g3-1d |
324 |
... |
325 |
properties: |
326 |
OS: linux |
327 |
USER: user |
328 |
... |
329 |
kamaki |
330 |
|
331 |
Just to test the feature, let's create a property "greet" with value |
332 |
"hi there", and then remove it. Also, let's restore the value of USER: |
333 |
|
334 |
.. code-block:: console |
335 |
|
336 |
kamaki image modify 7h1rd-1m4g3-1d -p greet='Hi there' -p user=root |
337 |
kamaki image info 7h1rd-1m4g3-1d |
338 |
... |
339 |
properties: |
340 |
OS: linux |
341 |
USER: root |
342 |
GREET: Hi there |
343 |
... |
344 |
kamaki image modify 7h1rd-1m4g3-1d --property-del greet |
345 |
kamaki image info 7h1rd-1m4g3-1d |
346 |
... |
347 |
properties: |
348 |
OS: linux |
349 |
USER: root |
350 |
... |
351 |
kamaki |
352 |
|
353 |
|
354 |
Reregistration: priorities and overrides |
355 |
---------------------------------------- |
356 |
|
357 |
Let's review the examples presented above:: |
358 |
|
359 |
- Register an image with name `Debian Base Gama` |
360 |
- Unregister the image |
361 |
- Register a new image of the uploaded image object, with custom properties |
362 |
- Reregister the image with a meta file and modified properties and name |
363 |
|
364 |
**The image id is related to the image object** |
365 |
|
366 |
Although the image was unregistered and reregistered, the image id, that is |
367 |
produced automatically at the server side, was the same. This is due to the |
368 |
fact that image ids are 1 to 1 related to image objects uploaded to Pithos+ |
369 |
|
370 |
**An explicit image name overrides the metafile** |
371 |
|
372 |
Each image needs a name and this is given as the first argument of the |
373 |
`register` command. This name overrides the name in the metafile. |
374 |
|
375 |
**Reregistration is not an update, but an override** |
376 |
|
377 |
The property `user: root` won over `user: someuser`, because it was set last. |
378 |
Actually, all properties were replaced by the new ones, when the image was |
379 |
reregistered, and the same holds with all customizable attributes of the image. |
380 |
|
381 |
Command line wins the metafile |
382 |
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ |
383 |
|
384 |
Let's compine the metafile with a command line attribute `user: admin` |
385 |
|
386 |
.. code-block:: console |
387 |
|
388 |
kamaki image register -f --name='Debian Base Delta' --location=/images/debian_base3.diskdump --metafile=debian_base3.diskdump.meta |
389 |
checksum: 3cb03556ec971f...e8dd6190443b560cb7 |
390 |
container-format: bare |
391 |
created-at: 2013-06-19 08:00:22 |
392 |
deleted-at: |
393 |
disk-format: diskdump |
394 |
id: 7h1rd-1m4g3-1d |
395 |
is-public: False |
396 |
location: pithos://s0me-u53r/images/s0m3-u53r-1d/images/debian_base3.diskdump |
397 |
name: Debian Base Delta |
398 |
owner: s0m3-u53r-1d |
399 |
properties: |
400 |
OS: linux |
401 |
USER: root |
402 |
size: 903471104 |
403 |
status: available |
404 |
updated-at: 2013-06-19 08:01:00 |
405 |
Metadata file uploaded as /images/debian_base3.diskdump.meta (version 1377) |
406 |
kamaki |
407 |
|
408 |
Although the property `OS` was read from the metafile, the property `USER` was |
409 |
set by the command line property to `admin`. |
410 |
|
411 |
.. note:: This feature allows the use of a metafile as a template for uploading |
412 |
multiple images with many common attributes but slight modifications per |
413 |
image |
414 |
|
415 |
Multiple metafile versions |
416 |
-------------------------- |
417 |
|
418 |
.. warning:: Make sure your container is set to auto, otherwise, there will be |
419 |
no object versions |
420 |
|
421 |
.. code-block:: console |
422 |
|
423 |
kamaki container info images | grep versioning |
424 |
x-container-policy-versioning: auto |
425 |
|
426 |
To set versioning to auto |
427 |
|
428 |
.. code-block:: console |
429 |
|
430 |
kamaki container modify images --versioning=auto |
431 |
|
432 |
In the above examples, the image was registered many times by overriding the |
433 |
metafile. It is possible to avoid writing a metafile, as well as accessing |
434 |
older versions of the file. |
435 |
|
436 |
Register the image without uploading a metafile |
437 |
|
438 |
.. code-block:: console |
439 |
|
440 |
kamaki image register --name='Debian Base Delta' --location=/images/debian_base3.diskdump --metafile=debian_base3.diskdump.meta --no-metafile-upload |
441 |
checksum: 3cb03556ec971f...e8dd6190443b560cb7 |
442 |
container-format: bare |
443 |
created-at: 2013-06-19 08:00:22 |
444 |
deleted-at: |
445 |
disk-format: diskdump |
446 |
id: 7h1rd-1m4g3-1d |
447 |
is-public: False |
448 |
location: pithos://s0m3-u53r/images/s0m3-u53r-1d/images/debian_base3.diskdump |
449 |
name: Debian Base Delta |
450 |
owner: s0m3-u53r-1d |
451 |
properties: |
452 |
OS: linux |
453 |
USER: root |
454 |
size: 903471104 |
455 |
status: available |
456 |
updated-at: 2013-06-19 08:01:00 |
457 |
kamaki |
458 |
|
459 |
Uploaded metafiles are kept in versions, thanks to Pithos+ versioning support |
460 |
|
461 |
.. code-block:: console |
462 |
|
463 |
kamaki file info /images/debian_base3.diskdump.meta --object-versions |
464 |
1352 |
465 |
created: 19-06-2013 11:00:22 |
466 |
1359 |
467 |
created: 19-06-2013 11:01:00 |
468 |
1377 |
469 |
created: 19-06-2013 11:34:37 |
470 |
kamaki |
471 |
|
472 |
Consult the first version of the metafile |
473 |
|
474 |
.. code-block:: console |
475 |
|
476 |
kamaki file cat --object-version=1352 /images/debian_base3.diskdump.meta |
477 |
{ |
478 |
"status": "available", |
479 |
"name": "Debian Base Gama", |
480 |
"checksum": "3cb03556ec971f...e8dd6190443b560cb7", |
481 |
"id": "7h1rd-1m4g3-1d2", |
482 |
"updated-at": "2013-06-19 08:01:00", |
483 |
"created-at": "2013-06-19 08:00:22", |
484 |
"properties": {}, |
485 |
"location": "pithos://s0m3-u53r/images/s0m3-u53r-1d/images/debian_base3.diskdump", |
486 |
"is-public": "False", |
487 |
"owner": "s0m3-u53r-1d", |
488 |
"disk-format": "diskdump", |
489 |
"size": "903471104", |
490 |
"deleted-at": "", |
491 |
"container-format": "bare" |
492 |
} |
493 |
|
494 |
Download the second version |
495 |
|
496 |
.. code-block:: console |
497 |
|
498 |
kamaki file download --object-version=1359 /images/debian_base3.diskdump.meta debian_base3.diskdump.meta.v1359 |
499 |
Downloading /images/debian_base3.diskdump.meta --> /home/someuser/debian_base3.diskdump.meta.v1359 |
500 |
Done |
501 |
|
502 |
Batch image upload |
503 |
------------------ |
504 |
|
505 |
Let a directory at /home/someuser/images with a variety of images needed to be |
506 |
uploaded and registered. |
507 |
|
508 |
Batch-upload the images |
509 |
|
510 |
.. code-block:: console |
511 |
|
512 |
kamaki file upload -r images /images |
513 |
mkdir /images/images |
514 |
Uploading /home/someuser/images/debian.diskdump --> /images/images/debian.diskdump |
515 |
Uploading /home/someuser/images/win8.diskdump --> /images/images/win8.diskdump |
516 |
... |
517 |
Done |
518 |
|
519 |
Make sure the images are uploaded to /images/images/ remote directory object |
520 |
|
521 |
.. code-block:: console |
522 |
|
523 |
kamaki file list /images/images/ |
524 |
D images/ |
525 |
983MB images/debian.diskdump |
526 |
2.2GB images/win8.diskdump |
527 |
... |
528 |
kamaki |
529 |
|
530 |
Use the host shell capabilities to streamline the registration, so exit kamaki |
531 |
|
532 |
.. code-block:: console |
533 |
|
534 |
kamaki /exit |