rapi.rst 29.6 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

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

``ganeti-rapi`` reads users and passwords from a file (usually
24
``/var/lib/ganeti/rapi/users``) on startup. Changes to the file will be
25
read automatically.
26 27 28 29 30

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

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
56
   described in :rfc:`2617` ("HTTP Authentication"), sections 3.2.2.2 and
57 58 59 60 61 62 63
   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
The protocol used is JSON_ over HTTP designed after the REST_ principle.
68
HTTP Basic authentication as per :rfc:`2617` is supported.
69 70 71 72

.. _JSON: http://www.json.org/
.. _REST: http://en.wikipedia.org/wiki/Representational_State_Transfer

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
A note on JSON as used by RAPI
++++++++++++++++++++++++++++++

JSON_ as used by Ganeti RAPI does not conform to the specification in
:rfc:`4627`. Section 2 defines a JSON text to be either an object
(``{"key": "value", …}``) or an array (``[1, 2, 3, …]``). In violation
of this RAPI uses plain strings (``"master-candidate"``, ``"1234"``) for
some requests or responses. Changing this now would likely break
existing clients and cause a lot of trouble.

.. highlight:: ruby

Unlike Python's `JSON encoder and decoder
<http://docs.python.org/library/json.html>`_, other programming
languages or libraries may only provide a strict implementation, not
allowing plain values. For those, responses can usually be wrapped in an
array whose first element is then used, e.g. the response ``"1234"``
becomes ``["1234"]``. This works equally well for more complex values.
Example in Ruby::

  require "json"

  # Insert code to get response here
  response = "\"1234\""

  decoded = JSON.parse("[#{response}]").first

Short of modifying the encoder to allow encoding to a less strict
format, requests will have to be formatted by hand. Newer RAPI requests
already use a dictionary as their input data and shouldn't cause any
problems.


107 108 109
PUT or POST?
------------

110 111 112
According to :rfc:`2616` 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.
113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132

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``.

133 134 135
Generic parameters
------------------

136 137
A few parameter mean the same thing across all resources which implement
it.
138 139 140 141

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

Iustin Pop's avatar
Iustin Pop committed
142 143 144 145 146
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.
147 148 149 150

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

151 152 153
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.
154

Iustin Pop's avatar
Iustin Pop committed
155 156 157
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.
158

159 160 161 162 163 164
``force``
+++++++++++

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

165 166 167
Usage examples
--------------

Iustin Pop's avatar
Iustin Pop committed
168 169
You can access the API using your favorite programming language as long
as it supports network connections.
170

171 172 173 174 175
Ganeti RAPI client
++++++++++++++++++

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

176 177 178
Shell
+++++

Iustin Pop's avatar
Iustin Pop committed
179 180
.. highlight:: sh

181 182
Using wget::

Iustin Pop's avatar
Iustin Pop committed
183
   wget -q -O - https://CLUSTERNAME:5080/2/info
184 185 186 187 188 189 190 191 192

or curl::

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


Python
++++++

Iustin Pop's avatar
Iustin Pop committed
193 194 195
.. highlight:: python

::
196 197

  import urllib2
Tim Boring's avatar
Tim Boring committed
198
  f = urllib2.urlopen('https://CLUSTERNAME:5080/2/info')
199 200 201 202 203 204
  print f.read()


JavaScript
++++++++++

205
.. warning:: While it's possible to use JavaScript, it poses several
Iustin Pop's avatar
Iustin Pop committed
206 207 208
   potential problems, including browser blocking request due to
   non-standard ports or different domain names. Fetching the data on
   the webserver is easier.
209

Iustin Pop's avatar
Iustin Pop committed
210 211
.. highlight:: javascript

212 213
::

Tim Boring's avatar
Tim Boring committed
214
  var url = 'https://CLUSTERNAME:5080/2/info';
215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232
  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
233
.. highlight:: javascript
234

Iustin Pop's avatar
Iustin Pop committed
235 236
``/``
+++++
237

Iustin Pop's avatar
Iustin Pop committed
238
The root resource.
239

Iustin Pop's avatar
Iustin Pop committed
240
It supports the following commands: ``GET``.
241

Iustin Pop's avatar
Iustin Pop committed
242 243
``GET``
~~~~~~~
244

Iustin Pop's avatar
Iustin Pop committed
245
Shows the list of mapped resources.
246

Iustin Pop's avatar
Iustin Pop committed
247
Returns: a dictionary with 'name' and 'uri' keys for each of them.
248

Iustin Pop's avatar
Iustin Pop committed
249 250
``/2``
++++++
251

Iustin Pop's avatar
Iustin Pop committed
252
The ``/2`` resource, the root of the version 2 API.
253

Iustin Pop's avatar
Iustin Pop committed
254
It supports the following commands: ``GET``.
255

Iustin Pop's avatar
Iustin Pop committed
256 257
``GET``
~~~~~~~
258

Iustin Pop's avatar
Iustin Pop committed
259
Show the list of mapped resources.
260

Iustin Pop's avatar
Iustin Pop committed
261
Returns: a dictionary with ``name`` and ``uri`` keys for each of them.
262

Iustin Pop's avatar
Iustin Pop committed
263 264
``/2/info``
+++++++++++
265

Iustin Pop's avatar
Iustin Pop committed
266
Cluster information resource.
267

Iustin Pop's avatar
Iustin Pop committed
268
It supports the following commands: ``GET``.
269

Iustin Pop's avatar
Iustin Pop committed
270 271
``GET``
~~~~~~~
272

Iustin Pop's avatar
Iustin Pop committed
273
Returns cluster information.
274

Iustin Pop's avatar
Iustin Pop committed
275
Example::
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

  {
    "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
       }
      }
    }

306 307 308 309 310 311 312 313 314 315 316 317 318 319

``/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.


320 321 322 323 324 325 326 327 328 329 330
``/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.
331 332
``instance-reinstall-reqv1``
  Instance reinstall supports body parameters.
333 334


335 336 337 338 339
``/2/groups``
+++++++++++++

The groups resource.

340
It supports the following commands: ``GET``, ``POST``.
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

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

Returns a list of all existing node groups.

Example::

    [
      {
        "name": "group1",
        "uri": "\/2\/groups\/group1"
      },
      {
        "name": "group2",
        "uri": "\/2\/groups\/group2"
      }
    ]

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

Example::

    [
      {
        "name": "group1",
        "node_cnt": 2,
        "node_list": [
          "node1.example.com",
          "node2.example.com"
        ],
        "uuid": "0d7d407c-262e-49af-881a-6a430034bf43"
      },
      {
        "name": "group2",
        "node_cnt": 1,
        "node_list": [
          "node3.example.com"
        ],
        "uuid": "f5a277e7-68f9-44d3-a378-4b25ecb5df5c"
      }
    ]

386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401
``POST``
~~~~~~~~

Creates a node group.

If the optional bool *dry-run* argument is provided, the job will not be
actually executed, only the pre-execution checks will be done.

Returns: a job ID that can be used later for polling.

Body parameters:

``name`` (string, required)
  Node group name.


402
``/2/groups/[group_name]``
403
++++++++++++++++++++++++++
404 405 406

Returns information about a node group.

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

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

Returns information about a node group, similar to the bulk output from
the node group list.

``DELETE``
~~~~~~~~~~

Deletes a node group.

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


``/2/groups/[group_name]/rename``
+++++++++++++++++++++++++++++++++

Renames a node group.

Supports the following commands: ``PUT``.

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

Returns a job ID.

Body parameters:

``new_name`` (string, required)
  New node group name.
439 440


Iustin Pop's avatar
Iustin Pop committed
441 442
``/2/instances``
++++++++++++++++
443

Iustin Pop's avatar
Iustin Pop committed
444
The instances resource.
445

Iustin Pop's avatar
Iustin Pop committed
446
It supports the following commands: ``GET``, ``POST``.
447

Iustin Pop's avatar
Iustin Pop committed
448 449
``GET``
~~~~~~~
450

Iustin Pop's avatar
Iustin Pop committed
451
Returns a list of all available instances.
452

Iustin Pop's avatar
Iustin Pop committed
453
Example::
454 455 456 457 458 459 460 461 462 463 464 465

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

466 467 468
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.
469

Iustin Pop's avatar
Iustin Pop committed
470
Example::
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

    [
      {
         "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
500 501
``POST``
~~~~~~~~
502

Iustin Pop's avatar
Iustin Pop committed
503
Creates an instance.
504

505 506 507 508
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.
509

Iustin Pop's avatar
Iustin Pop committed
510
Returns: a job ID that can be used later for polling.
511

512 513 514 515 516 517
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).
518 519
``mode`` (string, required)
  Instance creation mode.
520
``name`` (string, required)
521
  Instance name.
522
``disk_template`` (string, required)
523
  Disk template for instance.
524 525 526 527 528 529 530
``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: ``[{}, {},
531 532
  {"ip": "198.51.100.4"}]``. Each NIC definition can contain the
  optional values ``ip``, ``mode``, ``link`` and ``bridge``.
533
``os`` (string, required)
534
  Instance operating system.
535 536 537
``osparams`` (dictionary)
  Dictionary with OS parameters. If not valid for the given OS, the job
  will fail.
538 539
``force_variant`` (bool)
  Whether to force an unknown variant.
540 541
``no_install`` (bool)
  Do not install the OS (will enable no-start)
542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561
``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.
562
``source_handshake`` (list)
563 564 565 566 567
  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).
568 569 570 571
``hypervisor`` (string)
  Hypervisor name.
``hvparams`` (dict)
  Hypervisor parameters, hypervisor-dependent.
572
``beparams`` (dict)
573 574 575
  Backend parameters.


Iustin Pop's avatar
Iustin Pop committed
576 577
``/2/instances/[instance_name]``
++++++++++++++++++++++++++++++++
578

Iustin Pop's avatar
Iustin Pop committed
579
Instance-specific resource.
580

Iustin Pop's avatar
Iustin Pop committed
581
It supports the following commands: ``GET``, ``DELETE``.
582

Iustin Pop's avatar
Iustin Pop committed
583 584
``GET``
~~~~~~~
585

Iustin Pop's avatar
Iustin Pop committed
586 587
Returns information about an instance, similar to the bulk output from
the instance list.
588

Iustin Pop's avatar
Iustin Pop committed
589 590
``DELETE``
~~~~~~~~~~
591

Iustin Pop's avatar
Iustin Pop committed
592
Deletes an instance.
593

594 595
It supports the ``dry-run`` argument.

596

597 598 599 600 601 602 603 604 605 606
``/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
607 608
configuration without querying the instance's nodes. The result will be
a job id.
609 610


Iustin Pop's avatar
Iustin Pop committed
611 612
``/2/instances/[instance_name]/reboot``
+++++++++++++++++++++++++++++++++++++++
613

Iustin Pop's avatar
Iustin Pop committed
614
Reboots URI for an instance.
615

Iustin Pop's avatar
Iustin Pop committed
616
It supports the following commands: ``POST``.
617

Iustin Pop's avatar
Iustin Pop committed
618 619
``POST``
~~~~~~~~
620

Iustin Pop's avatar
Iustin Pop committed
621
Reboots the instance.
622

623 624 625 626 627 628 629 630 631 632 633 634
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.
635

636 637 638
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
639 640
``/2/instances/[instance_name]/shutdown``
+++++++++++++++++++++++++++++++++++++++++
641

Iustin Pop's avatar
Iustin Pop committed
642
Instance shutdown URI.
643

Iustin Pop's avatar
Iustin Pop committed
644
It supports the following commands: ``PUT``.
645

Iustin Pop's avatar
Iustin Pop committed
646 647
``PUT``
~~~~~~~
648

Iustin Pop's avatar
Iustin Pop committed
649
Shutdowns an instance.
650

651 652
It supports the ``dry-run`` argument.

653

Iustin Pop's avatar
Iustin Pop committed
654 655
``/2/instances/[instance_name]/startup``
++++++++++++++++++++++++++++++++++++++++
656

Iustin Pop's avatar
Iustin Pop committed
657
Instance startup URI.
658

Iustin Pop's avatar
Iustin Pop committed
659
It supports the following commands: ``PUT``.
660

Iustin Pop's avatar
Iustin Pop committed
661 662
``PUT``
~~~~~~~
663

Iustin Pop's avatar
Iustin Pop committed
664
Startup an instance.
665

666 667
The URI takes an optional ``force=1|0`` parameter to start the
instance even if secondary disks are failing.
668

669 670
It supports the ``dry-run`` argument.

671 672 673 674 675 676 677 678 679 680
``/2/instances/[instance_name]/reinstall``
++++++++++++++++++++++++++++++++++++++++++++++

Installs the operating system again.

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

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

681 682 683 684 685 686 687 688 689 690 691 692 693 694
Returns a job ID.

Body parameters:

``os`` (string, required)
  Instance operating system.
``start`` (bool, defaults to true)
  Whether to start instance after reinstallation.
``osparams`` (dict)
  Dictionary with (temporary) OS parameters.

For backwards compatbility, this resource also takes the query
parameters ``os`` (OS template name) and ``nostartup`` (bool). New
clients should use the body parameters.
695

696

697 698 699 700 701 702 703 704 705 706 707
``/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``,
708 709 710
``replace_on_secondary``, ``replace_new_secondary`` or
``replace_auto``), ``disks`` (comma separated list of disk indexes),
``remote_node`` and ``iallocator``.
711

712 713 714 715 716 717
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.

718

719 720 721 722 723 724 725 726 727 728
``/2/instances/[instance_name]/activate-disks``
+++++++++++++++++++++++++++++++++++++++++++++++

Activate disks on an instance.

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

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

729
Takes the bool parameter ``ignore_size``. When set ignore the recorded
730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745
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.


746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786
``/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).


787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806
``/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.


807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828
``/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.


829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867
``/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
868 869
``/2/instances/[instance_name]/tags``
+++++++++++++++++++++++++++++++++++++
870

Iustin Pop's avatar
Iustin Pop committed
871
Manages per-instance tags.
872

Iustin Pop's avatar
Iustin Pop committed
873
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
874

Iustin Pop's avatar
Iustin Pop committed
875 876
``GET``
~~~~~~~
877

Iustin Pop's avatar
Iustin Pop committed
878
Returns a list of tags.
879

Iustin Pop's avatar
Iustin Pop committed
880
Example::
881

Iustin Pop's avatar
Iustin Pop committed
882
    ["tag1", "tag2", "tag3"]
883

Iustin Pop's avatar
Iustin Pop committed
884 885
``PUT``
~~~~~~~
886

Iustin Pop's avatar
Iustin Pop committed
887
Add a set of tags.
888

Iustin Pop's avatar
Iustin Pop committed
889
The request as a list of strings should be ``PUT`` to this URI. The
890
result will be a job id.
891

892 893 894
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
895 896
``DELETE``
~~~~~~~~~~
897

Iustin Pop's avatar
Iustin Pop committed
898
Delete a tag.
899

Iustin Pop's avatar
Iustin Pop committed
900 901
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
902

Iustin Pop's avatar
Iustin Pop committed
903
    /tags?tag=[tag]&tag=[tag]
904

905 906 907
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
908 909
``/2/jobs``
+++++++++++
910

Iustin Pop's avatar
Iustin Pop committed
911
The ``/2/jobs`` resource.
912

Iustin Pop's avatar
Iustin Pop committed
913
It supports the following commands: ``GET``.
914

Iustin Pop's avatar
Iustin Pop committed
915 916
``GET``
~~~~~~~
917

Iustin Pop's avatar
Iustin Pop committed
918
Returns a dictionary of jobs.
919

Iustin Pop's avatar
Iustin Pop committed
920
Returns: a dictionary with jobs id and uri.
921

Iustin Pop's avatar
Iustin Pop committed
922 923
``/2/jobs/[job_id]``
++++++++++++++++++++
924 925


Iustin Pop's avatar
Iustin Pop committed
926
Individual job URI.
927

Iustin Pop's avatar
Iustin Pop committed
928
It supports the following commands: ``GET``, ``DELETE``.
929

Iustin Pop's avatar
Iustin Pop committed
930 931
``GET``
~~~~~~~
932

Iustin Pop's avatar
Iustin Pop committed
933
Returns a job status.
934

Iustin Pop's avatar
Iustin Pop committed
935
Returns: a dictionary with job parameters.
936

Iustin Pop's avatar
Iustin Pop committed
937
The result includes:
938

Iustin Pop's avatar
Iustin Pop committed
939 940
- id: job ID as a number
- status: current job status as a string
Iustin Pop's avatar
Iustin Pop committed
941 942
- ops: involved OpCodes as a list of dictionaries for each opcodes in
  the job
Iustin Pop's avatar
Iustin Pop committed
943
- opstatus: OpCodes status as a list
944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004
- 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.

1005

Iustin Pop's avatar
Iustin Pop committed
1006 1007
``DELETE``
~~~~~~~~~~
1008

Iustin Pop's avatar
Iustin Pop committed
1009
Cancel a not-yet-started job.
1010

1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029 1030 1031 1032 1033 1034

``/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
1035 1036
``/2/nodes``
++++++++++++
1037

Iustin Pop's avatar
Iustin Pop committed
1038
Nodes resource.
1039

Iustin Pop's avatar
Iustin Pop committed
1040
It supports the following commands: ``GET``.
1041

Iustin Pop's avatar
Iustin Pop committed
1042 1043
``GET``
~~~~~~~
1044

Iustin Pop's avatar
Iustin Pop committed
1045
Returns a list of all nodes.
1046

Iustin Pop's avatar
Iustin Pop committed
1047
Example::
1048 1049 1050 1051

    [
      {
        "id": "node1.example.com",
Iustin Pop's avatar
Iustin Pop committed
1052
        "uri": "\/nodes\/node1.example.com"
1053 1054 1055
      },
      {
        "id": "node2.example.com",
Iustin Pop's avatar
Iustin Pop committed
1056
        "uri": "\/nodes\/node2.example.com"
1057 1058 1059
      }
    ]

Iustin Pop's avatar
Iustin Pop committed
1060 1061 1062
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.
1063

Iustin Pop's avatar
Iustin Pop committed
1064
Example::
1065 1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081

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

1082 1083 1084 1085 1086 1087 1088
``/2/nodes/[node_name]``
+++++++++++++++++++++++++++++++++

Returns information about a node.

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

1089 1090 1091 1092 1093 1094 1095 1096 1097 1098 1099
``/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``
1100
parameters must be passed::
1101 1102 1103 1104

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

1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119
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.


1120 1121 1122 1123 1124 1125 1126 1127 1128 1129
``/2/nodes/[node_name]/migrate``
+++++++++++++++++++++++++++++++++

Migrates all primary instances from a node.

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

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

1130 1131 1132 1133 1134 1135 1136 1137
If no mode is explicitly specified, each instances' hypervisor default
migration mode will be used. Query parameters:

``live`` (bool)
  If set, use live migration if available.
``mode`` (string)
  Sets migration mode, ``live`` for live migration and ``non-live`` for
  non-live migration. Supported by Ganeti 2.2 and above.
1138 1139


1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168
``/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.

1169 1170
The request is a string which should be PUT to this URI. The result will
be a job id.
1171

1172
It supports the bool ``force`` argument.
1173

1174 1175 1176 1177 1178 1179 1180 1181 1182 1183
``/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
1184 1185
``output_fields``. The result will be a job id, using which the result
can be retrieved.
1186

1187 1188 1189 1190 1191 1192 1193 1194
``/2/nodes/[node_name]/storage/modify``
+++++++++++++++++++++++++++++++++++++++

Modifies storage units on the node.

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

1195 1196 1197 1198 1199
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.
1200

1201 1202 1203 1204 1205 1206 1207 1208
``/2/nodes/[node_name]/storage/repair``
+++++++++++++++++++++++++++++++++++++++

Repairs a storage unit on the node.

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

1209 1210 1211
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.
1212

Iustin Pop's avatar
Iustin Pop committed
1213 1214
``/2/nodes/[node_name]/tags``
+++++++++++++++++++++++++++++
1215

Iustin Pop's avatar
Iustin Pop committed
1216
Manages per-node tags.
1217

Iustin Pop's avatar
Iustin Pop committed
1218
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
1219

Iustin Pop's avatar
Iustin Pop committed
1220 1221
``GET``
~~~~~~~
1222

Iustin Pop's avatar
Iustin Pop committed
1223
Returns a list of tags.
1224

Iustin Pop's avatar
Iustin Pop committed
1225
Example::
1226

Iustin Pop's avatar
Iustin Pop committed
1227
    ["tag1", "tag2", "tag3"]
1228

Iustin Pop's avatar
Iustin Pop committed
1229 1230
``PUT``
~~~~~~~
1231

Iustin Pop's avatar
Iustin Pop committed
1232
Add a set of tags.
1233

Iustin Pop's avatar
Iustin Pop committed
1234 1235
The request as a list of strings should be PUT to this URI. The result
will be a job id.
1236

1237 1238
It supports the ``dry-run`` argument.

Iustin Pop's avatar
Iustin Pop committed
1239 1240
``DELETE``
~~~~~~~~~~
1241

Iustin Pop's avatar
Iustin Pop committed
1242
Deletes tags.
1243

Iustin Pop's avatar
Iustin Pop committed
1244 1245
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
1246

Iustin Pop's avatar
Iustin Pop committed
1247
    /tags?tag=[tag]&tag=[tag]
1248

1249 1250 1251
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
1252 1253
``/2/os``
+++++++++
1254

Iustin Pop's avatar
Iustin Pop committed
1255
OS resource.
1256

Iustin Pop's avatar
Iustin Pop committed
1257
It supports the following commands: ``GET``.
1258

Iustin Pop's avatar
Iustin Pop committed
1259 1260
``GET``
~~~~~~~
1261

Iustin Pop's avatar
Iustin Pop committed
1262
Return a list of all OSes.
1263

Iustin Pop's avatar
Iustin Pop committed
1264
Can return error 500 in case of a problem. Since this is a costly
Iustin Pop's avatar
Iustin Pop committed
1265
operation for Ganeti 2.0, it is not recommended to execute it too often.
1266

Iustin Pop's avatar
Iustin Pop committed
1267
Example::
1268

Iustin Pop's avatar
Iustin Pop committed
1269
    ["debian-etch"]
1270

Iustin Pop's avatar
Iustin Pop committed
1271 1272
``/2/tags``
+++++++++++
1273

Iustin Pop's avatar
Iustin Pop committed
1274
Manages cluster tags.
1275

Iustin Pop's avatar
Iustin Pop committed
1276
It supports the following commands: ``GET``, ``PUT``, ``DELETE``.
1277

Iustin Pop's avatar
Iustin Pop committed
1278 1279
``GET``
~~~~~~~
1280

Iustin Pop's avatar
Iustin Pop committed
1281
Returns the cluster tags.
1282

Iustin Pop's avatar
Iustin Pop committed
1283
Example::
1284

Iustin Pop's avatar
Iustin Pop committed
1285
    ["tag1", "tag2", "tag3"]
1286

Iustin Pop's avatar
Iustin Pop committed
1287 1288
``PUT``
~~~~~~~
1289

Iustin Pop's avatar
Iustin Pop committed
1290
Adds a set of tags.
1291

Iustin Pop's avatar
Iustin Pop committed
1292 1293
The request as a list of strings should be PUT to this URI. The result
will be a job id.
1294

1295 1296 1297
It supports the ``dry-run`` argument.


Iustin Pop's avatar
Iustin Pop committed
1298 1299
``DELETE``
~~~~~~~~~~
1300

Iustin Pop's avatar
Iustin Pop committed
1301
Deletes tags.
1302

Iustin Pop's avatar
Iustin Pop committed
1303 1304
In order to delete a set of tags, the DELETE request should be addressed
to URI like::
1305

Iustin Pop's avatar
Iustin Pop committed
1306
    /tags?tag=[tag]&tag=[tag]
1307

1308 1309 1310
It supports the ``dry-run`` argument.


Iustin Pop's avatar