rapi.rst 26 KB
Newer Older
1 2 3
Ganeti remote API
=================

Iustin Pop's avatar
Iustin Pop committed
4
Documents Ganeti version |version|
5 6 7 8 9 10 11 12 13 14 15 16 17 18

.. contents::

Introduction
------------

Ganeti supports a remote API for enable external tools to easily
retrieve information about a cluster's state. The remote API daemon,
*ganeti-rapi*, is automatically started on the master node. By default
it runs on TCP port 5080, but this can be changed either in
``.../constants.py`` or via the command line parameter *-p*. SSL mode,
which is used by default, can also be disabled by passing command line
parameters.

19 20 21 22 23 24 25 26 27 28 29 30

Users and passwords
-------------------

``ganeti-rapi`` reads users and passwords from a file (usually
``/var/lib/ganeti/rapi_users``) on startup. After modifying the password
file, ``ganeti-rapi`` must be restarted.

Each line consists of two or three fields separated by whitespace. The
first two fields are for username and password. The third field is
optional and can be used to specify per-user options. Currently,
``write`` is the only option supported and enables the user to execute
31 32
operations modifying the cluster. Lines starting with the hash sign
(``#``) are treated as comments.
33 34 35 36 37

Passwords can either be written in clear text or as a hash. Clear text
passwords may not start with an opening brace (``{``) or they must be
prefixed with ``{cleartext}``. To use the hashed form, get the MD5 hash
of the string ``$username:Ganeti Remote API:$password`` (e.g. ``echo -n
38 39 40
'jack:Ganeti Remote API:abc123' | openssl md5``) [#pwhash]_ and prefix
it with ``{ha1}``. Using the scheme prefix for all passwords is
recommended. Scheme prefixes are not case sensitive.
41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63

Example::

  # Give Jack and Fred read-only access
  jack abc123
  fred {cleartext}foo555

  # Give write access to an imaginary instance creation script
  autocreator xyz789 write

  # Hashed password for Jessica
  jessica {HA1}7046452df2cbb530877058712cf17bd4 write


.. [#pwhash] Using the MD5 hash of username, realm and password is
   described in RFC2617_ ("HTTP Authentication"), sections 3.2.2.2 and
   3.3. The reason for using it over another algorithm is forward
   compatibility. If ``ganeti-rapi`` were to implement HTTP Digest
   authentication in the future, the same hash could be used.
   In the current version ``ganeti-rapi``'s realm, ``Ganeti Remote
   API``, can only be changed by modifying the source code.


64 65 66
Protocol
--------

67 68
The protocol used is JSON_ over HTTP designed after the REST_ principle.
HTTP Basic authentication as per RFC2617_ is supported.
69 70 71

.. _JSON: http://www.json.org/
.. _REST: http://en.wikipedia.org/wiki/Representational_State_Transfer
72
.. _RFC2617: http://tools.ietf.org/rfc/rfc2617.txt
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

PUT or POST?
------------

According to RFC2616 the main difference between PUT and POST is that
POST can create new resources but PUT can only create the resource the
URI was pointing to on the PUT request.

Unfortunately, due to historic reasons, the Ganeti RAPI library is not
consistent with this usage, so just use the methods as documented below
for each resource.

For more details have a look in the source code at
``lib/rapi/rlib2.py``.


Generic parameter types
-----------------------

A few generic refered parameter types and the values they allow.

``bool``
++++++++

A boolean option will accept ``1`` or ``0`` as numbers but not
i.e. ``True`` or ``False``.

101 102 103
Generic parameters
------------------

104 105
A few parameter mean the same thing across all resources which implement
it.
106 107 108 109

``bulk``
++++++++

Iustin Pop's avatar
Iustin Pop committed
110 111 112 113 114
Bulk-mode means that for the resources which usually return just a list
of child resources (e.g. ``/2/instances`` which returns just instance
names), the output will instead contain detailed data for all these
subresources. This is more efficient than query-ing the sub-resources
themselves.
115 116 117 118

``dry-run``
+++++++++++

119 120 121
The boolean *dry-run* argument, if provided and set, signals to Ganeti
that the job should not be executed, only the pre-execution checks will
be done.
122

Iustin Pop's avatar
Iustin Pop committed
123 124 125
This is useful in trying to determine (without guarantees though, as in
the meantime the cluster state could have changed) if the operation is
likely to succeed or at least start executing.
126

127 128 129 130 131 132
``force``
+++++++++++

Force operation to continue even if it will cause the cluster to become
inconsistent (e.g. because there are not enough master candidates).

133 134 135
Usage examples
--------------

Iustin Pop's avatar
Iustin Pop committed
136 137
You can access the API using your favorite programming language as long
as it supports network connections.
138

139 140 141 142 143
Ganeti RAPI client
++++++++++++++++++

Ganeti includes a standalone RAPI client, ``lib/rapi/client.py``.

144 145 146
Shell
+++++

Iustin Pop's avatar
Iustin Pop committed
147 148
.. highlight:: sh

149 150
Using wget::

Iustin Pop's avatar
Iustin Pop committed
151
   wget -q -O - https://CLUSTERNAME:5080/2/info
152 153 154 155 156 157 158 159 160

or curl::

  curl https://CLUSTERNAME:5080/2/info


Python
++++++

Iustin Pop's avatar
Iustin Pop committed
161 162 163
.. highlight:: python

::
164 165

  import urllib2
Tim Boring's avatar
Tim Boring committed
166
  f = urllib2.urlopen('https://CLUSTERNAME:5080/2/info')
167 168 169 170 171 172
  print f.read()


JavaScript
++++++++++

173
.. warning:: While it's possible to use JavaScript, it poses several
Iustin Pop's avatar
Iustin Pop committed
174 175 176
   potential problems, including browser blocking request due to
   non-standard ports or different domain names. Fetching the data on
   the webserver is easier.
177

Iustin Pop's avatar
Iustin Pop committed
178 179
.. highlight:: javascript

180 181
::

Tim Boring's avatar
Tim Boring committed
182
  var url = 'https://CLUSTERNAME:5080/2/info';
183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200
  var info;
  var xmlreq = new XMLHttpRequest();
  xmlreq.onreadystatechange = function () {
    if (xmlreq.readyState != 4) return;
    if (xmlreq.status == 200) {
      info = eval("(" + xmlreq.responseText + ")");
      alert(info);
    } else {
      alert('Error fetching cluster info');
    }
    xmlreq = null;
  };
  xmlreq.open('GET', url, true);
  xmlreq.send(null);

Resources
---------

Iustin Pop's avatar
Iustin Pop committed
201
.. highlight:: javascript
202

Iustin Pop's avatar
Iustin Pop committed
203 204
``/``
+++++
205

Iustin Pop's avatar
Iustin Pop committed
206
The root resource.
207

Iustin Pop's avatar
Iustin Pop committed
208
It supports the following commands: ``GET``.
209

Iustin Pop's avatar
Iustin Pop committed
210 211
``GET``
~~~~~~~
212

Iustin Pop's avatar
Iustin Pop committed
213
Shows the list of mapped resources.
214

Iustin Pop's avatar
Iustin Pop committed
215
Returns: a dictionary with 'name' and 'uri' keys for each of them.
216

Iustin Pop's avatar
Iustin Pop committed
217 218
``/2``
++++++
219

Iustin Pop's avatar
Iustin Pop committed
220
The ``/2`` resource, the root of the version 2 API.
221

Iustin Pop's avatar
Iustin Pop committed
222
It supports the following commands: ``GET``.
223

Iustin Pop's avatar
Iustin Pop committed
224 225
``GET``
~~~~~~~
226

Iustin Pop's avatar
Iustin Pop committed
227
Show the list of mapped resources.
228

Iustin Pop's avatar
Iustin Pop committed
229
Returns: a dictionary with ``name`` and ``uri`` keys for each of them.
230

Iustin Pop's avatar
Iustin Pop committed
231 232
``/2/info``
+++++++++++
233

Iustin Pop's avatar
Iustin Pop committed
234
Cluster information resource.
235

Iustin Pop's avatar
Iustin Pop committed
236
It supports the following commands: ``GET``.
237

Iustin Pop's avatar
Iustin Pop committed
238 239
``GET``
~~~~~~~
240

Iustin Pop's avatar
Iustin Pop committed
241
Returns cluster information.
242

Iustin Pop's avatar
Iustin Pop committed
243
Example::
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

  {
    "config_version": 2000000,
    "name": "cluster",
    "software_version": "2.0.0~beta2",
    "os_api_version": 10,
    "export_version": 0,
    "candidate_pool_size": 10,
    "enabled_hypervisors": [
      "fake"
    ],
    "hvparams": {
      "fake": {}
     },
    "default_hypervisor": "fake",
    "master": "node1.example.com",
    "architecture": [
      "64bit",
      "x86_64"
    ],
    "protocol_version": 20,
    "beparams": {
      "default": {
        "auto_balance": true,
        "vcpus": 1,
        "memory": 128
       }
      }
    }

274 275 276 277 278 279 280 281 282 283 284 285 286 287

``/2/redistribute-config``
++++++++++++++++++++++++++

Redistribute configuration to all nodes.

It supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Redistribute configuration to all nodes. The result will be a job id.


288 289 290 291 292 293 294 295 296 297 298 299 300
``/2/features``
+++++++++++++++

``GET``
~~~~~~~

Returns a list of features supported by the RAPI server. Available
features:

``instance-create-reqv1``
  Instance creation request data version 1 supported.


Iustin Pop's avatar
Iustin Pop committed
301 302
``/2/instances``
++++++++++++++++
303

Iustin Pop's avatar
Iustin Pop committed
304
The instances resource.
305

Iustin Pop's avatar
Iustin Pop committed
306
It supports the following commands: ``GET``, ``POST``.
307

Iustin Pop's avatar
Iustin Pop committed
308 309
``GET``
~~~~~~~
310

Iustin Pop's avatar
Iustin Pop committed
311
Returns a list of all available instances.
312

Iustin Pop's avatar
Iustin Pop committed
313
Example::
314 315 316 317 318 319 320 321 322 323 324 325

    [
      {
        "name": "web.example.com",
        "uri": "\/instances\/web.example.com"
      },
      {
        "name": "mail.example.com",
        "uri": "\/instances\/mail.example.com"
      }
    ]

326 327 328
If the optional bool *bulk* argument is provided and set to a true value
(i.e ``?bulk=1``), the output contains detailed information about
instances as a list.
329

Iustin Pop's avatar
Iustin Pop committed
330
Example::
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

    [
      {
         "status": "running",
         "disk_usage": 20480,
         "nic.bridges": [
           "xen-br0"
          ],
         "name": "web.example.com",
         "tags": ["tag1", "tag2"],
         "beparams": {
           "vcpus": 2,
           "memory": 512
         },
         "disk.sizes": [
             20480
         ],
         "pnode": "node1.example.com",
         "nic.macs": ["01:23:45:67:89:01"],
         "snodes": ["node2.example.com"],
         "disk_template": "drbd",
         "admin_state": true,
         "os": "debian-etch",
         "oper_state": true
      },
      ...
    ]


Iustin Pop's avatar
Iustin Pop committed
360 361
``POST``
~~~~~~~~
362

Iustin Pop's avatar
Iustin Pop committed
363
Creates an instance.
364

365 366 367 368
If the optional bool *dry-run* argument is provided, the job will not be
actually executed, only the pre-execution checks will be done. Query-ing
the job result will return, in both dry-run and normal case, the list of
nodes selected for the instance.
369

Iustin Pop's avatar
Iustin Pop committed
370
Returns: a job ID that can be used later for polling.
371

372 373 374 375 376 377
Body parameters:

``__version__`` (int, required)
  Must be ``1`` (older Ganeti versions used a different format for
  instance creation requests, version ``0``, but that format is not
  documented).
378 379
``mode`` (string, required)
  Instance creation mode.
380
``name`` (string, required)
381
  Instance name.
382
``disk_template`` (string, required)
383
  Disk template for instance.
384 385 386 387 388 389 390
``disks`` (list, required)
  List of disk definitions. Example: ``[{"size": 100}, {"size": 5}]``.
  Each disk definition must contain a ``size`` value and can contain an
  optional ``mode`` value denoting the disk access mode (``ro`` or
  ``rw``).
``nics`` (list, required)
  List of NIC (network interface) definitions. Example: ``[{}, {},
391 392
  {"ip": "198.51.100.4"}]``. Each NIC definition can contain the
  optional values ``ip``, ``mode``, ``link`` and ``bridge``.
393
``os`` (string, required)
394
  Instance operating system.
395 396 397
``osparams`` (dictionary)
  Dictionary with OS parameters. If not valid for the given OS, the job
  will fail.
398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419
``force_variant`` (bool)
  Whether to force an unknown variant.
``pnode`` (string)
  Primary node.
``snode`` (string)
  Secondary node.
``src_node`` (string)
  Source node for import.
``src_path`` (string)
  Source directory for import.
``start`` (bool)
  Whether to start instance after creation.
``ip_check`` (bool)
  Whether to ensure instance's IP address is inactive.
``name_check`` (bool)
  Whether to ensure instance's name is resolvable.
``file_storage_dir`` (string)
  File storage directory.
``file_driver`` (string)
  File storage driver.
``iallocator`` (string)
  Instance allocator name.
420
``source_handshake`` (list)
421 422 423 424 425
  Signed handshake from source (remote import only).
``source_x509_ca`` (string)
  Source X509 CA in PEM format (remote import only).
``source_instance_name`` (string)
  Source instance name (remote import only).
426 427 428 429
``hypervisor`` (string)
  Hypervisor name.
``hvparams`` (dict)
  Hypervisor parameters, hypervisor-dependent.
430
``beparams`` (dict)
431 432 433
  Backend parameters.


Iustin Pop's avatar
Iustin Pop committed
434 435
``/2/instances/[instance_name]``
++++++++++++++++++++++++++++++++
436

Iustin Pop's avatar
Iustin Pop committed
437
Instance-specific resource.
438

Iustin Pop's avatar
Iustin Pop committed
439
It supports the following commands: ``GET``, ``DELETE``.
440

Iustin Pop's avatar
Iustin Pop committed
441 442
``GET``
~~~~~~~
443

Iustin Pop's avatar
Iustin Pop committed
444 445
Returns information about an instance, similar to the bulk output from
the instance list.
446

Iustin Pop's avatar
Iustin Pop committed
447 448
``DELETE``
~~~~~~~~~~
449

Iustin Pop's avatar
Iustin Pop committed
450
Deletes an instance.
451

452 453
It supports the ``dry-run`` argument.

454

455 456 457 458 459 460 461 462 463 464
``/2/instances/[instance_name]/info``
+++++++++++++++++++++++++++++++++++++++

It supports the following commands: ``GET``.

``GET``
~~~~~~~

Requests detailed information about the instance. An optional parameter,
``static`` (bool), can be set to return only static information from the
465 466
configuration without querying the instance's nodes. The result will be
a job id.
467 468


Iustin Pop's avatar
Iustin Pop committed
469 470
``/2/instances/[instance_name]/reboot``
+++++++++++++++++++++++++++++++++++++++
471

Iustin Pop's avatar
Iustin Pop committed
472
Reboots URI for an instance.
473

Iustin Pop's avatar
Iustin Pop committed
474
It supports the following commands: ``POST``.
475

Iustin Pop's avatar
Iustin Pop committed
476 477
``POST``
~~~~~~~~
478

Iustin Pop's avatar
Iustin Pop committed
479
Reboots the instance.
480

481 482 483 484 485 486 487 488 489 490 491 492
The URI takes optional ``type=soft|hard|full`` and
``ignore_secondaries=0|1`` parameters.

``type`` defines the reboot type. ``soft`` is just a normal reboot,
without terminating the hypervisor. ``hard`` means full shutdown
(including terminating the hypervisor process) and startup again.
``full`` is like ``hard`` but also recreates the configuration from
ground up as if you would have done a ``gnt-instance shutdown`` and
``gnt-instance start`` on it.

``ignore_secondaries`` is a bool argument indicating if we start the
instance even if secondary disks are failing.
493

494 495 496
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
497 498
``/2/instances/[instance_name]/shutdown``
+++++++++++++++++++++++++++++++++++++++++
499

Iustin Pop's avatar
Iustin Pop committed
500
Instance shutdown URI.
501

Iustin Pop's avatar
Iustin Pop committed
502
It supports the following commands: ``PUT``.
503

Iustin Pop's avatar
Iustin Pop committed
504 505
``PUT``
~~~~~~~
506

Iustin Pop's avatar
Iustin Pop committed
507
Shutdowns an instance.
508

509 510
It supports the ``dry-run`` argument.

511

Iustin Pop's avatar
Iustin Pop committed
512 513
``/2/instances/[instance_name]/startup``
++++++++++++++++++++++++++++++++++++++++
514

Iustin Pop's avatar
Iustin Pop committed
515
Instance startup URI.
516

Iustin Pop's avatar
Iustin Pop committed
517
It supports the following commands: ``PUT``.
518

Iustin Pop's avatar
Iustin Pop committed
519 520
``PUT``
~~~~~~~
521

Iustin Pop's avatar
Iustin Pop committed
522
Startup an instance.
523

524 525
The URI takes an optional ``force=1|0`` parameter to start the
instance even if secondary disks are failing.
526

527 528
It supports the ``dry-run`` argument.

529 530 531 532 533 534 535 536 537 538 539 540
``/2/instances/[instance_name]/reinstall``
++++++++++++++++++++++++++++++++++++++++++++++

Installs the operating system again.

It supports the following commands: ``POST``.

``POST``
~~~~~~~~

Takes the parameters ``os`` (OS template name) and ``nostartup`` (bool).

541

542 543 544 545 546 547 548 549 550 551 552
``/2/instances/[instance_name]/replace-disks``
++++++++++++++++++++++++++++++++++++++++++++++

Replaces disks on an instance.

It supports the following commands: ``POST``.

``POST``
~~~~~~~~

Takes the parameters ``mode`` (one of ``replace_on_primary``,
553 554 555
``replace_on_secondary``, ``replace_new_secondary`` or
``replace_auto``), ``disks`` (comma separated list of disk indexes),
``remote_node`` and ``iallocator``.
556

557 558 559 560 561 562
Either ``remote_node`` or ``iallocator`` needs to be defined when using
``mode=replace_new_secondary``.

``mode`` is a mandatory parameter. ``replace_auto`` tries to determine
the broken disk(s) on its own and replacing it.

563

564 565 566 567 568 569 570 571 572 573
``/2/instances/[instance_name]/activate-disks``
+++++++++++++++++++++++++++++++++++++++++++++++

Activate disks on an instance.

It supports the following commands: ``PUT``.

``PUT``
~~~~~~~

574
Takes the bool parameter ``ignore_size``. When set ignore the recorded
575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590
size (useful for forcing activation when recorded size is wrong).


``/2/instances/[instance_name]/deactivate-disks``
+++++++++++++++++++++++++++++++++++++++++++++++++

Deactivate disks on an instance.

It supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Takes no parameters.


591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631
``/2/instances/[instance_name]/prepare-export``
+++++++++++++++++++++++++++++++++++++++++++++++++

Prepares an export of an instance.

It supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Takes one parameter, ``mode``, for the export mode. Returns a job ID.


``/2/instances/[instance_name]/export``
+++++++++++++++++++++++++++++++++++++++++++++++++

Exports an instance.

It supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Returns a job ID.

Body parameters:

``mode`` (string)
  Export mode.
``destination`` (required)
  Destination information, depends on export mode.
``shutdown`` (bool, required)
  Whether to shutdown instance before export.
``remove_instance`` (bool)
  Whether to remove instance after export.
``x509_key_name``
  Name of X509 key (remote export only).
``destination_x509_ca``
  Destination X509 CA (remote export only).


632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651
``/2/instances/[instance_name]/migrate``
++++++++++++++++++++++++++++++++++++++++

Migrates an instance.

Supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Returns a job ID.

Body parameters:

``mode`` (string)
  Migration mode.
``cleanup`` (bool)
  Whether a previously failed migration should be cleaned up.


652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673
``/2/instances/[instance_name]/rename``
++++++++++++++++++++++++++++++++++++++++

Renames an instance.

Supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Returns a job ID.

Body parameters:

``new_name`` (string, required)
  New instance name.
``ip_check`` (bool)
  Whether to ensure instance's IP address is inactive.
``name_check`` (bool)
  Whether to ensure instance's name is resolvable.


674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712
``/2/instances/[instance_name]/modify``
++++++++++++++++++++++++++++++++++++++++

Modifies an instance.

Supports the following commands: ``PUT``.

``PUT``
~~~~~~~

Returns a job ID.

Body parameters:

``osparams`` (dict)
  Dictionary with OS parameters.
``hvparams`` (dict)
  Hypervisor parameters, hypervisor-dependent.
``beparams`` (dict)
  Backend parameters.
``force`` (bool)
  Whether to force the operation.
``nics`` (list)
  List of NIC changes. Each item is of the form ``(op, settings)``.
  ``op`` can be ``add`` to add a new NIC with the specified settings,
  ``remove`` to remove the last NIC or a number to modify the settings
  of the NIC with that index.
``disks`` (list)
  List of disk changes. See ``nics``.
``disk_template`` (string)
  Disk template for instance.
``remote_node`` (string)
  Secondary node (used when changing disk template).
``os_name`` (string)
  Change instance's OS name. Does not reinstall the instance.
``force_variant`` (bool)
  Whether to force an unknown variant.


Iustin Pop's avatar
Iustin Pop committed
713 714
``/2/instances/[instance_name]/tags``
+++++++++++++++++++++++++++++++++++++
715

Iustin Pop's avatar
Iustin Pop committed
716
Manages per-instance tags.
717

Iustin Pop's avatar
Iustin Pop committed
718
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
719

Iustin Pop's avatar
Iustin Pop committed
720 721
``GET``
~~~~~~~
722

Iustin Pop's avatar
Iustin Pop committed
723
Returns a list of tags.
724

Iustin Pop's avatar
Iustin Pop committed
725
Example::
726

Iustin Pop's avatar
Iustin Pop committed
727
    ["tag1", "tag2", "tag3"]
728

Iustin Pop's avatar
Iustin Pop committed
729 730
``PUT``
~~~~~~~
731

Iustin Pop's avatar
Iustin Pop committed
732
Add a set of tags.
733

Iustin Pop's avatar
Iustin Pop committed
734
The request as a list of strings should be ``PUT`` to this URI. The
735
result will be a job id.
736

737 738 739
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
740 741
``DELETE``
~~~~~~~~~~
742

Iustin Pop's avatar
Iustin Pop committed
743
Delete a tag.
744

Iustin Pop's avatar
Iustin Pop committed
745 746
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
747

Iustin Pop's avatar
Iustin Pop committed
748
    /tags?tag=[tag]&tag=[tag]
749

750 751 752
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
753 754
``/2/jobs``
+++++++++++
755

Iustin Pop's avatar
Iustin Pop committed
756
The ``/2/jobs`` resource.
757

Iustin Pop's avatar
Iustin Pop committed
758
It supports the following commands: ``GET``.
759

Iustin Pop's avatar
Iustin Pop committed
760 761
``GET``
~~~~~~~
762

Iustin Pop's avatar
Iustin Pop committed
763
Returns a dictionary of jobs.
764

Iustin Pop's avatar
Iustin Pop committed
765
Returns: a dictionary with jobs id and uri.
766

Iustin Pop's avatar
Iustin Pop committed
767 768
``/2/jobs/[job_id]``
++++++++++++++++++++
769 770


Iustin Pop's avatar
Iustin Pop committed
771
Individual job URI.
772

Iustin Pop's avatar
Iustin Pop committed
773
It supports the following commands: ``GET``, ``DELETE``.
774

Iustin Pop's avatar
Iustin Pop committed
775 776
``GET``
~~~~~~~
777

Iustin Pop's avatar
Iustin Pop committed
778
Returns a job status.
779

Iustin Pop's avatar
Iustin Pop committed
780
Returns: a dictionary with job parameters.
781

Iustin Pop's avatar
Iustin Pop committed
782
The result includes:
783

Iustin Pop's avatar
Iustin Pop committed
784 785
- id: job ID as a number
- status: current job status as a string
Iustin Pop's avatar
Iustin Pop committed
786 787
- ops: involved OpCodes as a list of dictionaries for each opcodes in
  the job
Iustin Pop's avatar
Iustin Pop committed
788
- opstatus: OpCodes status as a list
789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849
- opresult: OpCodes results as a list

For a successful opcode, the ``opresult`` field corresponding to it will
contain the raw result from its :term:`LogicalUnit`. In case an opcode
has failed, its element in the opresult list will be a list of two
elements:

- first element the error type (the Ganeti internal error name)
- second element a list of either one or two elements:

  - the first element is the textual error description
  - the second element, if any, will hold an error classification

The error classification is most useful for the ``OpPrereqError``
error type - these errors happen before the OpCode has started
executing, so it's possible to retry the OpCode without side
effects. But whether it make sense to retry depends on the error
classification:

``resolver_error``
  Resolver errors. This usually means that a name doesn't exist in DNS,
  so if it's a case of slow DNS propagation the operation can be retried
  later.

``insufficient_resources``
  Not enough resources (iallocator failure, disk space, memory,
  etc.). If the resources on the cluster increase, the operation might
  succeed.

``wrong_input``
  Wrong arguments (at syntax level). The operation will not ever be
  accepted unless the arguments change.

``wrong_state``
  Wrong entity state. For example, live migration has been requested for
  a down instance, or instance creation on an offline node. The
  operation can be retried once the resource has changed state.

``unknown_entity``
  Entity not found. For example, information has been requested for an
  unknown instance.

``already_exists``
  Entity already exists. For example, instance creation has been
  requested for an already-existing instance.

``resource_not_unique``
  Resource not unique (e.g. MAC or IP duplication).

``internal_error``
  Internal cluster error. For example, a node is unreachable but not set
  offline, or the ganeti node daemons are not working, etc. A
  ``gnt-cluster verify`` should be run.

``environment_error``
  Environment error (e.g. node disk error). A ``gnt-cluster verify``
  should be run.

Note that in the above list, by entity we refer to a node or instance,
while by a resource we refer to an instance's disk, or NIC, etc.

850

Iustin Pop's avatar
Iustin Pop committed
851 852
``DELETE``
~~~~~~~~~~
853

Iustin Pop's avatar
Iustin Pop committed
854
Cancel a not-yet-started job.
855

856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879

``/2/jobs/[job_id]/wait``
+++++++++++++++++++++++++

``GET``
~~~~~~~

Waits for changes on a job. Takes the following body parameters in a
dict:

``fields``
  The job fields on which to watch for changes.

``previous_job_info``
  Previously received field values or None if not yet available.

``previous_log_serial``
  Highest log serial number received so far or None if not yet
  available.

Returns None if no changes have been detected and a dict with two keys,
``job_info`` and ``log_entries`` otherwise.


Iustin Pop's avatar
Iustin Pop committed
880 881
``/2/nodes``
++++++++++++
882

Iustin Pop's avatar
Iustin Pop committed
883
Nodes resource.
884

Iustin Pop's avatar
Iustin Pop committed
885
It supports the following commands: ``GET``.
886

Iustin Pop's avatar
Iustin Pop committed
887 888
``GET``
~~~~~~~
889

Iustin Pop's avatar
Iustin Pop committed
890
Returns a list of all nodes.
891

Iustin Pop's avatar
Iustin Pop committed
892
Example::
893 894 895 896

    [
      {
        "id": "node1.example.com",
Iustin Pop's avatar
Iustin Pop committed
897
        "uri": "\/nodes\/node1.example.com"
898 899 900
      },
      {
        "id": "node2.example.com",
Iustin Pop's avatar
Iustin Pop committed
901
        "uri": "\/nodes\/node2.example.com"
902 903 904
      }
    ]

Iustin Pop's avatar
Iustin Pop committed
905 906 907
If the optional 'bulk' argument is provided and set to 'true' value (i.e
'?bulk=1'), the output contains detailed information about nodes as a
list.
908

Iustin Pop's avatar
Iustin Pop committed
909
Example::
910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926

    [
      {
        "pinst_cnt": 1,
        "mfree": 31280,
        "mtotal": 32763,
        "name": "www.example.com",
        "tags": [],
        "mnode": 512,
        "dtotal": 5246208,
        "sinst_cnt": 2,
        "dfree": 5171712,
        "offline": false
      },
      ...
    ]

927 928 929 930 931 932 933
``/2/nodes/[node_name]``
+++++++++++++++++++++++++++++++++

Returns information about a node.

It supports the following commands: ``GET``.

934 935 936 937 938 939 940 941 942 943 944
``/2/nodes/[node_name]/evacuate``
+++++++++++++++++++++++++++++++++

Evacuates all secondary instances off a node.

It supports the following commands: ``POST``.

``POST``
~~~~~~~~

To evacuate a node, either one of the ``iallocator`` or ``remote_node``
945
parameters must be passed::
946 947 948 949

    evacuate?iallocator=[iallocator]
    evacuate?remote_node=[nodeX.example.com]

950 951 952 953 954 955 956 957 958 959 960 961 962 963 964
The result value will be a list, each element being a triple of the job
id (for this specific evacuation), the instance which is being evacuated
by this job, and the node to which it is being relocated. In case the
node is already empty, the result will be an empty list (without any
jobs being submitted).

And additional parameter ``early_release`` signifies whether to try to
parallelize the evacuations, at the risk of increasing I/O contention
and increasing the chances of data loss, if the primary node of any of
the instances being evacuated is not fully healthy.

If the dry-run parameter was specified, then the evacuation jobs were
not actually submitted, and the job IDs will be null.


965 966 967 968 969 970 971 972 973 974
``/2/nodes/[node_name]/migrate``
+++++++++++++++++++++++++++++++++

Migrates all primary instances from a node.

It supports the following commands: ``POST``.

``POST``
~~~~~~~~

975 976
No parameters are required, but the bool parameter ``live`` can be set
to use live migration (if available).
977 978 979

    migrate?live=[0|1]

980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008
``/2/nodes/[node_name]/role``
+++++++++++++++++++++++++++++

Manages node role.

It supports the following commands: ``GET``, ``PUT``.

The role is always one of the following:

  - drained
  - master
  - master-candidate
  - offline
  - regular

``GET``
~~~~~~~

Returns the current node role.

Example::

    "master-candidate"

``PUT``
~~~~~~~

Change the node role.

1009 1010
The request is a string which should be PUT to this URI. The result will
be a job id.
1011

1012
It supports the bool ``force`` argument.
1013

1014 1015 1016 1017 1018 1019 1020 1021 1022 1023
``/2/nodes/[node_name]/storage``
++++++++++++++++++++++++++++++++

Manages storage units on the node.

``GET``
~~~~~~~

Requests a list of storage units on a node. Requires the parameters
``storage_type`` (one of ``file``, ``lvm-pv`` or ``lvm-vg``) and
1024 1025
``output_fields``. The result will be a job id, using which the result
can be retrieved.
1026

1027 1028 1029 1030 1031 1032 1033 1034
``/2/nodes/[node_name]/storage/modify``
+++++++++++++++++++++++++++++++++++++++

Modifies storage units on the node.

``PUT``
~~~~~~~

1035 1036 1037 1038 1039
Modifies parameters of storage units on the node. Requires the
parameters ``storage_type`` (one of ``file``, ``lvm-pv`` or ``lvm-vg``)
and ``name`` (name of the storage unit).  Parameters can be passed
additionally. Currently only ``allocatable`` (bool) is supported. The
result will be a job id.
1040

1041 1042 1043 1044 1045 1046 1047 1048
``/2/nodes/[node_name]/storage/repair``
+++++++++++++++++++++++++++++++++++++++

Repairs a storage unit on the node.

``PUT``
~~~~~~~

1049 1050 1051
Repairs a storage unit on the node. Requires the parameters
``storage_type`` (currently only ``lvm-vg`` can be repaired) and
``name`` (name of the storage unit). The result will be a job id.
1052

Iustin Pop's avatar
Iustin Pop committed
1053 1054
``/2/nodes/[node_name]/tags``
+++++++++++++++++++++++++++++
1055

Iustin Pop's avatar
Iustin Pop committed
1056
Manages per-node tags.
1057

Iustin Pop's avatar
Iustin Pop committed
1058
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
1059

Iustin Pop's avatar
Iustin Pop committed
1060 1061
``GET``
~~~~~~~
1062

Iustin Pop's avatar
Iustin Pop committed
1063
Returns a list of tags.
1064

Iustin Pop's avatar
Iustin Pop committed
1065
Example::
1066

Iustin Pop's avatar
Iustin Pop committed
1067
    ["tag1", "tag2", "tag3"]
1068

Iustin Pop's avatar
Iustin Pop committed
1069 1070
``PUT``
~~~~~~~
1071

Iustin Pop's avatar
Iustin Pop committed
1072
Add a set of tags.
1073

Iustin Pop's avatar
Iustin Pop committed
1074 1075
The request as a list of strings should be PUT to this URI. The result
will be a job id.
1076

1077 1078
It supports the ``dry-run`` argument.

Iustin Pop's avatar
Iustin Pop committed
1079 1080
``DELETE``
~~~~~~~~~~
1081

Iustin Pop's avatar
Iustin Pop committed
1082
Deletes tags.
1083

Iustin Pop's avatar
Iustin Pop committed
1084 1085
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
1086

Iustin Pop's avatar
Iustin Pop committed
1087
    /tags?tag=[tag]&tag=[tag]
1088

1089 1090 1091
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
1092 1093
``/2/os``
+++++++++
1094

Iustin Pop's avatar
Iustin Pop committed
1095
OS resource.
1096

Iustin Pop's avatar
Iustin Pop committed
1097
It supports the following commands: ``GET``.
1098

Iustin Pop's avatar
Iustin Pop committed
1099 1100
``GET``
~~~~~~~
1101

Iustin Pop's avatar
Iustin Pop committed
1102
Return a list of all OSes.
1103

Iustin Pop's avatar
Iustin Pop committed
1104
Can return error 500 in case of a problem. Since this is a costly
Iustin Pop's avatar
Iustin Pop committed
1105
operation for Ganeti 2.0, it is not recommended to execute it too often.
1106

Iustin Pop's avatar
Iustin Pop committed
1107
Example::
1108

Iustin Pop's avatar
Iustin Pop committed
1109
    ["debian-etch"]
1110

Iustin Pop's avatar
Iustin Pop committed
1111 1112
``/2/tags``
+++++++++++
1113

Iustin Pop's avatar
Iustin Pop committed
1114
Manages cluster tags.
1115

Iustin Pop's avatar
Iustin Pop committed
1116
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
1117

Iustin Pop's avatar
Iustin Pop committed
1118 1119
``GET``
~~~~~~~
1120

Iustin Pop's avatar
Iustin Pop committed
1121
Returns the cluster tags.
1122

Iustin Pop's avatar
Iustin Pop committed
1123
Example::
1124

Iustin Pop's avatar
Iustin Pop committed
1125
    ["tag1", "tag2", "tag3"]
1126

Iustin Pop's avatar
Iustin Pop committed
1127 1128
``PUT``
~~~~~~~
1129

Iustin Pop's avatar
Iustin Pop committed
1130
Adds a set of tags.
1131

Iustin Pop's avatar
Iustin Pop committed
1132 1133
The request as a list of strings should be PUT to this URI. The result
will be a job id.
1134

1135 1136 1137
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
1138 1139
``DELETE``
~~~~~~~~~~
1140

Iustin Pop's avatar
Iustin Pop committed
1141
Deletes tags.
1142

Iustin Pop's avatar
Iustin Pop committed
1143 1144
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
1145

Iustin Pop's avatar
Iustin Pop committed
1146
    /tags?tag=[tag]&tag=[tag]
1147

1148 1149 1150
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
1151 1152
``/version``
++++++++++++
1153

Iustin Pop's avatar
Iustin Pop committed
1154
The version resource.
1155

Iustin Pop's avatar
Iustin Pop committed
1156 1157
This resource should be used to determine the remote API version and to
adapt clients accordingly.
1158

Iustin Pop's avatar
Iustin Pop committed
1159
It supports the following commands: ``GET``.
1160

Iustin Pop's avatar
Iustin Pop committed
1161 1162
``GET``
~~~~~~~
1163

Iustin Pop's avatar
Iustin Pop committed
1164 1165
Returns the remote API version. Ganeti 1.2 returned ``1`` and Ganeti 2.0
returns ``2``.
1166 1167

.. vim: set textwidth=72 :
Iustin Pop's avatar
Iustin Pop committed
1168 1169 1170 1171
.. Local Variables:
.. mode: rst
.. fill-column: 72
.. End: