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#
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#
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# Copyright (C) 2010, 2011, 2012 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Ganeti RAPI client.
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@attention: To use the RAPI client, the application B{must} call
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            C{pycurl.global_init} during initialization and
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            C{pycurl.global_cleanup} before exiting the process. This is very
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            important in multi-threaded programs. See curl_global_init(3) and
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            curl_global_cleanup(3) for details. The decorator L{UsesRapiClient}
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            can be used.
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"""
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# No Ganeti-specific modules should be imported. The RAPI client is supposed to
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# be standalone.
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import logging
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import simplejson
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import socket
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import urllib
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import threading
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import pycurl
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import time
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try:
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  from cStringIO import StringIO
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except ImportError:
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  from StringIO import StringIO
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49

    
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GANETI_RAPI_PORT = 5080
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GANETI_RAPI_VERSION = 2
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HTTP_DELETE = "DELETE"
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HTTP_GET = "GET"
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HTTP_PUT = "PUT"
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HTTP_POST = "POST"
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HTTP_OK = 200
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HTTP_NOT_FOUND = 404
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HTTP_APP_JSON = "application/json"
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REPLACE_DISK_PRI = "replace_on_primary"
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REPLACE_DISK_SECONDARY = "replace_on_secondary"
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REPLACE_DISK_CHG = "replace_new_secondary"
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REPLACE_DISK_AUTO = "replace_auto"
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NODE_EVAC_PRI = "primary-only"
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NODE_EVAC_SEC = "secondary-only"
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NODE_EVAC_ALL = "all"
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NODE_ROLE_DRAINED = "drained"
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NODE_ROLE_MASTER_CANDIDATE = "master-candidate"
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NODE_ROLE_MASTER = "master"
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NODE_ROLE_OFFLINE = "offline"
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NODE_ROLE_REGULAR = "regular"
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JOB_STATUS_QUEUED = "queued"
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JOB_STATUS_WAITING = "waiting"
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JOB_STATUS_CANCELING = "canceling"
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JOB_STATUS_RUNNING = "running"
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JOB_STATUS_CANCELED = "canceled"
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JOB_STATUS_SUCCESS = "success"
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JOB_STATUS_ERROR = "error"
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JOB_STATUS_PENDING = frozenset([
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  JOB_STATUS_QUEUED,
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  JOB_STATUS_WAITING,
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  JOB_STATUS_CANCELING,
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  ])
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JOB_STATUS_FINALIZED = frozenset([
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  JOB_STATUS_CANCELED,
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  JOB_STATUS_SUCCESS,
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  JOB_STATUS_ERROR,
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  ])
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JOB_STATUS_ALL = frozenset([
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  JOB_STATUS_RUNNING,
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  ]) | JOB_STATUS_PENDING | JOB_STATUS_FINALIZED
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97
# Legacy name
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JOB_STATUS_WAITLOCK = JOB_STATUS_WAITING
99

    
100
# Internal constants
101
_REQ_DATA_VERSION_FIELD = "__version__"
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_QPARAM_DRY_RUN = "dry-run"
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_QPARAM_FORCE = "force"
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105
# Feature strings
106
INST_CREATE_REQV1 = "instance-create-reqv1"
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INST_REINSTALL_REQV1 = "instance-reinstall-reqv1"
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NODE_MIGRATE_REQV1 = "node-migrate-reqv1"
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NODE_EVAC_RES1 = "node-evac-res1"
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# Old feature constant names in case they're references by users of this module
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_INST_CREATE_REQV1 = INST_CREATE_REQV1
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_INST_REINSTALL_REQV1 = INST_REINSTALL_REQV1
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_NODE_MIGRATE_REQV1 = NODE_MIGRATE_REQV1
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_NODE_EVAC_RES1 = NODE_EVAC_RES1
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117
#: Resolver errors
118
ECODE_RESOLVER = "resolver_error"
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120
#: Not enough resources (iallocator failure, disk space, memory, etc.)
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ECODE_NORES = "insufficient_resources"
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123
#: Temporarily out of resources; operation can be tried again
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ECODE_TEMP_NORES = "temp_insufficient_resources"
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126
#: Wrong arguments (at syntax level)
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ECODE_INVAL = "wrong_input"
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#: Wrong entity state
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ECODE_STATE = "wrong_state"
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#: Entity not found
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ECODE_NOENT = "unknown_entity"
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#: Entity already exists
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ECODE_EXISTS = "already_exists"
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#: Resource not unique (e.g. MAC or IP duplication)
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ECODE_NOTUNIQUE = "resource_not_unique"
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#: Internal cluster error
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ECODE_FAULT = "internal_error"
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144
#: Environment error (e.g. node disk error)
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ECODE_ENVIRON = "environment_error"
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147
#: List of all failure types
148
ECODE_ALL = frozenset([
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  ECODE_RESOLVER,
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  ECODE_NORES,
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  ECODE_TEMP_NORES,
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  ECODE_INVAL,
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  ECODE_STATE,
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  ECODE_NOENT,
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  ECODE_EXISTS,
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  ECODE_NOTUNIQUE,
157
  ECODE_FAULT,
158
  ECODE_ENVIRON,
159
  ])
160

    
161
# Older pycURL versions don't have all error constants
162
try:
163
  _CURLE_SSL_CACERT = pycurl.E_SSL_CACERT
164
  _CURLE_SSL_CACERT_BADFILE = pycurl.E_SSL_CACERT_BADFILE
165
except AttributeError:
166
  _CURLE_SSL_CACERT = 60
167
  _CURLE_SSL_CACERT_BADFILE = 77
168

    
169
_CURL_SSL_CERT_ERRORS = frozenset([
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  _CURLE_SSL_CACERT,
171
  _CURLE_SSL_CACERT_BADFILE,
172
  ])
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174

    
175
class Error(Exception):
176
  """Base error class for this module.
177

178
  """
179
  pass
180

    
181

    
182
class GanetiApiError(Error):
183
  """Generic error raised from Ganeti API.
184

185
  """
186
  def __init__(self, msg, code=None):
187
    Error.__init__(self, msg)
188
    self.code = code
189

    
190

    
191
class CertificateError(GanetiApiError):
192
  """Raised when a problem is found with the SSL certificate.
193

194
  """
195
  pass
196

    
197

    
198
def _AppendIf(container, condition, value):
199
  """Appends to a list if a condition evaluates to truth.
200

201
  """
202
  if condition:
203
    container.append(value)
204

    
205
  return condition
206

    
207

    
208
def _AppendDryRunIf(container, condition):
209
  """Appends a "dry-run" parameter if a condition evaluates to truth.
210

211
  """
212
  return _AppendIf(container, condition, (_QPARAM_DRY_RUN, 1))
213

    
214

    
215
def _AppendForceIf(container, condition):
216
  """Appends a "force" parameter if a condition evaluates to truth.
217

218
  """
219
  return _AppendIf(container, condition, (_QPARAM_FORCE, 1))
220

    
221

    
222
def _SetItemIf(container, condition, item, value):
223
  """Sets an item if a condition evaluates to truth.
224

225
  """
226
  if condition:
227
    container[item] = value
228

    
229
  return condition
230

    
231

    
232
def UsesRapiClient(fn):
233
  """Decorator for code using RAPI client to initialize pycURL.
234

235
  """
236
  def wrapper(*args, **kwargs):
237
    # curl_global_init(3) and curl_global_cleanup(3) must be called with only
238
    # one thread running. This check is just a safety measure -- it doesn't
239
    # cover all cases.
240
    assert threading.activeCount() == 1, \
241
           "Found active threads when initializing pycURL"
242

    
243
    pycurl.global_init(pycurl.GLOBAL_ALL)
244
    try:
245
      return fn(*args, **kwargs)
246
    finally:
247
      pycurl.global_cleanup()
248

    
249
  return wrapper
250

    
251

    
252
def GenericCurlConfig(verbose=False, use_signal=False,
253
                      use_curl_cabundle=False, cafile=None, capath=None,
254
                      proxy=None, verify_hostname=False,
255
                      connect_timeout=None, timeout=None,
256
                      _pycurl_version_fn=pycurl.version_info):
257
  """Curl configuration function generator.
258

259
  @type verbose: bool
260
  @param verbose: Whether to set cURL to verbose mode
261
  @type use_signal: bool
262
  @param use_signal: Whether to allow cURL to use signals
263
  @type use_curl_cabundle: bool
264
  @param use_curl_cabundle: Whether to use cURL's default CA bundle
265
  @type cafile: string
266
  @param cafile: In which file we can find the certificates
267
  @type capath: string
268
  @param capath: In which directory we can find the certificates
269
  @type proxy: string
270
  @param proxy: Proxy to use, None for default behaviour and empty string for
271
                disabling proxies (see curl_easy_setopt(3))
272
  @type verify_hostname: bool
273
  @param verify_hostname: Whether to verify the remote peer certificate's
274
                          commonName
275
  @type connect_timeout: number
276
  @param connect_timeout: Timeout for establishing connection in seconds
277
  @type timeout: number
278
  @param timeout: Timeout for complete transfer in seconds (see
279
                  curl_easy_setopt(3)).
280

281
  """
282
  if use_curl_cabundle and (cafile or capath):
283
    raise Error("Can not use default CA bundle when CA file or path is set")
284

    
285
  def _ConfigCurl(curl, logger):
286
    """Configures a cURL object
287

288
    @type curl: pycurl.Curl
289
    @param curl: cURL object
290

291
    """
292
    logger.debug("Using cURL version %s", pycurl.version)
293

    
294
    # pycurl.version_info returns a tuple with information about the used
295
    # version of libcurl. Item 5 is the SSL library linked to it.
296
    # e.g.: (3, '7.18.0', 463360, 'x86_64-pc-linux-gnu', 1581, 'GnuTLS/2.0.4',
297
    # 0, '1.2.3.3', ...)
298
    sslver = _pycurl_version_fn()[5]
299
    if not sslver:
300
      raise Error("No SSL support in cURL")
301

    
302
    lcsslver = sslver.lower()
303
    if lcsslver.startswith("openssl/"):
304
      pass
305
    elif lcsslver.startswith("nss/"):
306
      # TODO: investigate compatibility beyond a simple test
307
      pass
308
    elif lcsslver.startswith("gnutls/"):
309
      if capath:
310
        raise Error("cURL linked against GnuTLS has no support for a"
311
                    " CA path (%s)" % (pycurl.version, ))
312
    else:
313
      raise NotImplementedError("cURL uses unsupported SSL version '%s'" %
314
                                sslver)
315

    
316
    curl.setopt(pycurl.VERBOSE, verbose)
317
    curl.setopt(pycurl.NOSIGNAL, not use_signal)
318

    
319
    # Whether to verify remote peer's CN
320
    if verify_hostname:
321
      # curl_easy_setopt(3): "When CURLOPT_SSL_VERIFYHOST is 2, that
322
      # certificate must indicate that the server is the server to which you
323
      # meant to connect, or the connection fails. [...] When the value is 1,
324
      # the certificate must contain a Common Name field, but it doesn't matter
325
      # what name it says. [...]"
326
      curl.setopt(pycurl.SSL_VERIFYHOST, 2)
327
    else:
328
      curl.setopt(pycurl.SSL_VERIFYHOST, 0)
329

    
330
    if cafile or capath or use_curl_cabundle:
331
      # Require certificates to be checked
332
      curl.setopt(pycurl.SSL_VERIFYPEER, True)
333
      if cafile:
334
        curl.setopt(pycurl.CAINFO, str(cafile))
335
      if capath:
336
        curl.setopt(pycurl.CAPATH, str(capath))
337
      # Not changing anything for using default CA bundle
338
    else:
339
      # Disable SSL certificate verification
340
      curl.setopt(pycurl.SSL_VERIFYPEER, False)
341

    
342
    if proxy is not None:
343
      curl.setopt(pycurl.PROXY, str(proxy))
344

    
345
    # Timeouts
346
    if connect_timeout is not None:
347
      curl.setopt(pycurl.CONNECTTIMEOUT, connect_timeout)
348
    if timeout is not None:
349
      curl.setopt(pycurl.TIMEOUT, timeout)
350

    
351
  return _ConfigCurl
352

    
353

    
354
class GanetiRapiClient(object): # pylint: disable=R0904
355
  """Ganeti RAPI client.
356

357
  """
358
  USER_AGENT = "Ganeti RAPI Client"
359
  _json_encoder = simplejson.JSONEncoder(sort_keys=True)
360

    
361
  def __init__(self, host, port=GANETI_RAPI_PORT,
362
               username=None, password=None, logger=logging,
363
               curl_config_fn=None, curl_factory=None):
364
    """Initializes this class.
365

366
    @type host: string
367
    @param host: the ganeti cluster master to interact with
368
    @type port: int
369
    @param port: the port on which the RAPI is running (default is 5080)
370
    @type username: string
371
    @param username: the username to connect with
372
    @type password: string
373
    @param password: the password to connect with
374
    @type curl_config_fn: callable
375
    @param curl_config_fn: Function to configure C{pycurl.Curl} object
376
    @param logger: Logging object
377

378
    """
379
    self._username = username
380
    self._password = password
381
    self._logger = logger
382
    self._curl_config_fn = curl_config_fn
383
    self._curl_factory = curl_factory
384

    
385
    try:
386
      socket.inet_pton(socket.AF_INET6, host)
387
      address = "[%s]:%s" % (host, port)
388
    except socket.error:
389
      address = "%s:%s" % (host, port)
390

    
391
    self._base_url = "https://%s" % address
392

    
393
    if username is not None:
394
      if password is None:
395
        raise Error("Password not specified")
396
    elif password:
397
      raise Error("Specified password without username")
398

    
399
  def _CreateCurl(self):
400
    """Creates a cURL object.
401

402
    """
403
    # Create pycURL object if no factory is provided
404
    if self._curl_factory:
405
      curl = self._curl_factory()
406
    else:
407
      curl = pycurl.Curl()
408

    
409
    # Default cURL settings
410
    curl.setopt(pycurl.VERBOSE, False)
411
    curl.setopt(pycurl.FOLLOWLOCATION, False)
412
    curl.setopt(pycurl.MAXREDIRS, 5)
413
    curl.setopt(pycurl.NOSIGNAL, True)
414
    curl.setopt(pycurl.USERAGENT, self.USER_AGENT)
415
    curl.setopt(pycurl.SSL_VERIFYHOST, 0)
416
    curl.setopt(pycurl.SSL_VERIFYPEER, False)
417
    curl.setopt(pycurl.HTTPHEADER, [
418
      "Accept: %s" % HTTP_APP_JSON,
419
      "Content-type: %s" % HTTP_APP_JSON,
420
      ])
421

    
422
    assert ((self._username is None and self._password is None) ^
423
            (self._username is not None and self._password is not None))
424

    
425
    if self._username:
426
      # Setup authentication
427
      curl.setopt(pycurl.HTTPAUTH, pycurl.HTTPAUTH_BASIC)
428
      curl.setopt(pycurl.USERPWD,
429
                  str("%s:%s" % (self._username, self._password)))
430

    
431
    # Call external configuration function
432
    if self._curl_config_fn:
433
      self._curl_config_fn(curl, self._logger)
434

    
435
    return curl
436

    
437
  @staticmethod
438
  def _EncodeQuery(query):
439
    """Encode query values for RAPI URL.
440

441
    @type query: list of two-tuples
442
    @param query: Query arguments
443
    @rtype: list
444
    @return: Query list with encoded values
445

446
    """
447
    result = []
448

    
449
    for name, value in query:
450
      if value is None:
451
        result.append((name, ""))
452

    
453
      elif isinstance(value, bool):
454
        # Boolean values must be encoded as 0 or 1
455
        result.append((name, int(value)))
456

    
457
      elif isinstance(value, (list, tuple, dict)):
458
        raise ValueError("Invalid query data type %r" % type(value).__name__)
459

    
460
      else:
461
        result.append((name, value))
462

    
463
    return result
464

    
465
  def _SendRequest(self, method, path, query, content):
466
    """Sends an HTTP request.
467

468
    This constructs a full URL, encodes and decodes HTTP bodies, and
469
    handles invalid responses in a pythonic way.
470

471
    @type method: string
472
    @param method: HTTP method to use
473
    @type path: string
474
    @param path: HTTP URL path
475
    @type query: list of two-tuples
476
    @param query: query arguments to pass to urllib.urlencode
477
    @type content: str or None
478
    @param content: HTTP body content
479

480
    @rtype: str
481
    @return: JSON-Decoded response
482

483
    @raises CertificateError: If an invalid SSL certificate is found
484
    @raises GanetiApiError: If an invalid response is returned
485

486
    """
487
    assert path.startswith("/")
488

    
489
    curl = self._CreateCurl()
490

    
491
    if content is not None:
492
      encoded_content = self._json_encoder.encode(content)
493
    else:
494
      encoded_content = ""
495

    
496
    # Build URL
497
    urlparts = [self._base_url, path]
498
    if query:
499
      urlparts.append("?")
500
      urlparts.append(urllib.urlencode(self._EncodeQuery(query)))
501

    
502
    url = "".join(urlparts)
503

    
504
    self._logger.debug("Sending request %s %s (content=%r)",
505
                       method, url, encoded_content)
506

    
507
    # Buffer for response
508
    encoded_resp_body = StringIO()
509

    
510
    # Configure cURL
511
    curl.setopt(pycurl.CUSTOMREQUEST, str(method))
512
    curl.setopt(pycurl.URL, str(url))
513
    curl.setopt(pycurl.POSTFIELDS, str(encoded_content))
514
    curl.setopt(pycurl.WRITEFUNCTION, encoded_resp_body.write)
515

    
516
    try:
517
      # Send request and wait for response
518
      try:
519
        curl.perform()
520
      except pycurl.error, err:
521
        if err.args[0] in _CURL_SSL_CERT_ERRORS:
522
          raise CertificateError("SSL certificate error %s" % err,
523
                                 code=err.args[0])
524

    
525
        raise GanetiApiError(str(err), code=err.args[0])
526
    finally:
527
      # Reset settings to not keep references to large objects in memory
528
      # between requests
529
      curl.setopt(pycurl.POSTFIELDS, "")
530
      curl.setopt(pycurl.WRITEFUNCTION, lambda _: None)
531

    
532
    # Get HTTP response code
533
    http_code = curl.getinfo(pycurl.RESPONSE_CODE)
534

    
535
    # Was anything written to the response buffer?
536
    if encoded_resp_body.tell():
537
      response_content = simplejson.loads(encoded_resp_body.getvalue())
538
    else:
539
      response_content = None
540

    
541
    if http_code != HTTP_OK:
542
      if isinstance(response_content, dict):
543
        msg = ("%s %s: %s" %
544
               (response_content["code"],
545
                response_content["message"],
546
                response_content["explain"]))
547
      else:
548
        msg = str(response_content)
549

    
550
      raise GanetiApiError(msg, code=http_code)
551

    
552
    return response_content
553

    
554
  def GetVersion(self):
555
    """Gets the Remote API version running on the cluster.
556

557
    @rtype: int
558
    @return: Ganeti Remote API version
559

560
    """
561
    return self._SendRequest(HTTP_GET, "/version", None, None)
562

    
563
  def GetFeatures(self):
564
    """Gets the list of optional features supported by RAPI server.
565

566
    @rtype: list
567
    @return: List of optional features
568

569
    """
570
    try:
571
      return self._SendRequest(HTTP_GET, "/%s/features" % GANETI_RAPI_VERSION,
572
                               None, None)
573
    except GanetiApiError, err:
574
      # Older RAPI servers don't support this resource
575
      if err.code == HTTP_NOT_FOUND:
576
        return []
577

    
578
      raise
579

    
580
  def GetOperatingSystems(self):
581
    """Gets the Operating Systems running in the Ganeti cluster.
582

583
    @rtype: list of str
584
    @return: operating systems
585

586
    """
587
    return self._SendRequest(HTTP_GET, "/%s/os" % GANETI_RAPI_VERSION,
588
                             None, None)
589

    
590
  def GetInfo(self):
591
    """Gets info about the cluster.
592

593
    @rtype: dict
594
    @return: information about the cluster
595

596
    """
597
    return self._SendRequest(HTTP_GET, "/%s/info" % GANETI_RAPI_VERSION,
598
                             None, None)
599

    
600
  def RedistributeConfig(self):
601
    """Tells the cluster to redistribute its configuration files.
602

603
    @rtype: string
604
    @return: job id
605

606
    """
607
    return self._SendRequest(HTTP_PUT,
608
                             "/%s/redistribute-config" % GANETI_RAPI_VERSION,
609
                             None, None)
610

    
611
  def ModifyCluster(self, **kwargs):
612
    """Modifies cluster parameters.
613

614
    More details for parameters can be found in the RAPI documentation.
615

616
    @rtype: string
617
    @return: job id
618

619
    """
620
    body = kwargs
621

    
622
    return self._SendRequest(HTTP_PUT,
623
                             "/%s/modify" % GANETI_RAPI_VERSION, None, body)
624

    
625
  def GetClusterTags(self):
626
    """Gets the cluster tags.
627

628
    @rtype: list of str
629
    @return: cluster tags
630

631
    """
632
    return self._SendRequest(HTTP_GET, "/%s/tags" % GANETI_RAPI_VERSION,
633
                             None, None)
634

    
635
  def AddClusterTags(self, tags, dry_run=False):
636
    """Adds tags to the cluster.
637

638
    @type tags: list of str
639
    @param tags: tags to add to the cluster
640
    @type dry_run: bool
641
    @param dry_run: whether to perform a dry run
642

643
    @rtype: string
644
    @return: job id
645

646
    """
647
    query = [("tag", t) for t in tags]
648
    _AppendDryRunIf(query, dry_run)
649

    
650
    return self._SendRequest(HTTP_PUT, "/%s/tags" % GANETI_RAPI_VERSION,
651
                             query, None)
652

    
653
  def DeleteClusterTags(self, tags, dry_run=False):
654
    """Deletes tags from the cluster.
655

656
    @type tags: list of str
657
    @param tags: tags to delete
658
    @type dry_run: bool
659
    @param dry_run: whether to perform a dry run
660
    @rtype: string
661
    @return: job id
662

663
    """
664
    query = [("tag", t) for t in tags]
665
    _AppendDryRunIf(query, dry_run)
666

    
667
    return self._SendRequest(HTTP_DELETE, "/%s/tags" % GANETI_RAPI_VERSION,
668
                             query, None)
669

    
670
  def GetInstances(self, bulk=False):
671
    """Gets information about instances on the cluster.
672

673
    @type bulk: bool
674
    @param bulk: whether to return all information about all instances
675

676
    @rtype: list of dict or list of str
677
    @return: if bulk is True, info about the instances, else a list of instances
678

679
    """
680
    query = []
681
    _AppendIf(query, bulk, ("bulk", 1))
682

    
683
    instances = self._SendRequest(HTTP_GET,
684
                                  "/%s/instances" % GANETI_RAPI_VERSION,
685
                                  query, None)
686
    if bulk:
687
      return instances
688
    else:
689
      return [i["id"] for i in instances]
690

    
691
  def GetInstance(self, instance):
692
    """Gets information about an instance.
693

694
    @type instance: str
695
    @param instance: instance whose info to return
696

697
    @rtype: dict
698
    @return: info about the instance
699

700
    """
701
    return self._SendRequest(HTTP_GET,
702
                             ("/%s/instances/%s" %
703
                              (GANETI_RAPI_VERSION, instance)), None, None)
704

    
705
  def GetInstanceInfo(self, instance, static=None):
706
    """Gets information about an instance.
707

708
    @type instance: string
709
    @param instance: Instance name
710
    @rtype: string
711
    @return: Job ID
712

713
    """
714
    if static is not None:
715
      query = [("static", static)]
716
    else:
717
      query = None
718

    
719
    return self._SendRequest(HTTP_GET,
720
                             ("/%s/instances/%s/info" %
721
                              (GANETI_RAPI_VERSION, instance)), query, None)
722

    
723
  @staticmethod
724
  def _UpdateWithKwargs(base, **kwargs):
725
    """Updates the base with params from kwargs.
726

727
    @param base: The base dict, filled with required fields
728

729
    @note: This is an inplace update of base
730

731
    """
732
    conflicts = set(kwargs.iterkeys()) & set(base.iterkeys())
733
    if conflicts:
734
      raise GanetiApiError("Required fields can not be specified as"
735
                           " keywords: %s" % ", ".join(conflicts))
736

    
737
    base.update((key, value) for key, value in kwargs.iteritems()
738
                if key != "dry_run")
739

    
740
  def InstanceAllocation(self, mode, name, disk_template, disks, nics,
741
                         **kwargs):
742
    """Generates an instance allocation as used by multiallocate.
743

744
    More details for parameters can be found in the RAPI documentation.
745
    It is the same as used by CreateInstance.
746

747
    @type mode: string
748
    @param mode: Instance creation mode
749
    @type name: string
750
    @param name: Hostname of the instance to create
751
    @type disk_template: string
752
    @param disk_template: Disk template for instance (e.g. plain, diskless,
753
                          file, or drbd)
754
    @type disks: list of dicts
755
    @param disks: List of disk definitions
756
    @type nics: list of dicts
757
    @param nics: List of NIC definitions
758

759
    @return: A dict with the generated entry
760

761
    """
762
    # All required fields for request data version 1
763
    alloc = {
764
      "mode": mode,
765
      "name": name,
766
      "disk_template": disk_template,
767
      "disks": disks,
768
      "nics": nics,
769
      }
770

    
771
    self._UpdateWithKwargs(alloc, **kwargs)
772

    
773
    return alloc
774

    
775
  def InstancesMultiAlloc(self, instances, **kwargs):
776
    """Tries to allocate multiple instances.
777

778
    More details for parameters can be found in the RAPI documentation.
779

780
    @param instances: A list of L{InstanceAllocation} results
781

782
    """
783
    query = []
784
    body = {
785
      "instances": instances,
786
      }
787
    self._UpdateWithKwargs(body, **kwargs)
788

    
789
    _AppendDryRunIf(query, kwargs.get("dry_run"))
790

    
791
    return self._SendRequest(HTTP_POST,
792
                             "/%s/instances-multi-alloc" % GANETI_RAPI_VERSION,
793
                             query, body)
794

    
795
  def CreateInstance(self, mode, name, disk_template, disks, nics,
796
                     **kwargs):
797
    """Creates a new instance.
798

799
    More details for parameters can be found in the RAPI documentation.
800

801
    @type mode: string
802
    @param mode: Instance creation mode
803
    @type name: string
804
    @param name: Hostname of the instance to create
805
    @type disk_template: string
806
    @param disk_template: Disk template for instance (e.g. plain, diskless,
807
                          file, or drbd)
808
    @type disks: list of dicts
809
    @param disks: List of disk definitions
810
    @type nics: list of dicts
811
    @param nics: List of NIC definitions
812
    @type dry_run: bool
813
    @keyword dry_run: whether to perform a dry run
814

815
    @rtype: string
816
    @return: job id
817

818
    """
819
    query = []
820

    
821
    _AppendDryRunIf(query, kwargs.get("dry_run"))
822

    
823
    if _INST_CREATE_REQV1 in self.GetFeatures():
824
      body = self.InstanceAllocation(mode, name, disk_template, disks, nics,
825
                                     **kwargs)
826
      body[_REQ_DATA_VERSION_FIELD] = 1
827
    else:
828
      raise GanetiApiError("Server does not support new-style (version 1)"
829
                           " instance creation requests")
830

    
831
    return self._SendRequest(HTTP_POST, "/%s/instances" % GANETI_RAPI_VERSION,
832
                             query, body)
833

    
834
  def DeleteInstance(self, instance, dry_run=False, **kwargs):
835
    """Deletes an instance.
836

837
    @type instance: str
838
    @param instance: the instance to delete
839

840
    @rtype: string
841
    @return: job id
842

843
    """
844
    query = []
845
    body = kwargs
846

    
847
    _AppendDryRunIf(query, dry_run)
848

    
849
    return self._SendRequest(HTTP_DELETE,
850
                             ("/%s/instances/%s" %
851
                              (GANETI_RAPI_VERSION, instance)), query, body)
852

    
853
  def ModifyInstance(self, instance, **kwargs):
854
    """Modifies an instance.
855

856
    More details for parameters can be found in the RAPI documentation.
857

858
    @type instance: string
859
    @param instance: Instance name
860
    @rtype: string
861
    @return: job id
862

863
    """
864
    body = kwargs
865

    
866
    return self._SendRequest(HTTP_PUT,
867
                             ("/%s/instances/%s/modify" %
868
                              (GANETI_RAPI_VERSION, instance)), None, body)
869

    
870
  def ActivateInstanceDisks(self, instance, ignore_size=None):
871
    """Activates an instance's disks.
872

873
    @type instance: string
874
    @param instance: Instance name
875
    @type ignore_size: bool
876
    @param ignore_size: Whether to ignore recorded size
877
    @rtype: string
878
    @return: job id
879

880
    """
881
    query = []
882
    _AppendIf(query, ignore_size, ("ignore_size", 1))
883

    
884
    return self._SendRequest(HTTP_PUT,
885
                             ("/%s/instances/%s/activate-disks" %
886
                              (GANETI_RAPI_VERSION, instance)), query, None)
887

    
888
  def DeactivateInstanceDisks(self, instance):
889
    """Deactivates an instance's disks.
890

891
    @type instance: string
892
    @param instance: Instance name
893
    @rtype: string
894
    @return: job id
895

896
    """
897
    return self._SendRequest(HTTP_PUT,
898
                             ("/%s/instances/%s/deactivate-disks" %
899
                              (GANETI_RAPI_VERSION, instance)), None, None)
900

    
901
  def RecreateInstanceDisks(self, instance, disks=None, nodes=None):
902
    """Recreate an instance's disks.
903

904
    @type instance: string
905
    @param instance: Instance name
906
    @type disks: list of int
907
    @param disks: List of disk indexes
908
    @type nodes: list of string
909
    @param nodes: New instance nodes, if relocation is desired
910
    @rtype: string
911
    @return: job id
912

913
    """
914
    body = {}
915
    _SetItemIf(body, disks is not None, "disks", disks)
916
    _SetItemIf(body, nodes is not None, "nodes", nodes)
917

    
918
    return self._SendRequest(HTTP_POST,
919
                             ("/%s/instances/%s/recreate-disks" %
920
                              (GANETI_RAPI_VERSION, instance)), None, body)
921

    
922
  def GrowInstanceDisk(self, instance, disk, amount, wait_for_sync=None):
923
    """Grows a disk of an instance.
924

925
    More details for parameters can be found in the RAPI documentation.
926

927
    @type instance: string
928
    @param instance: Instance name
929
    @type disk: integer
930
    @param disk: Disk index
931
    @type amount: integer
932
    @param amount: Grow disk by this amount (MiB)
933
    @type wait_for_sync: bool
934
    @param wait_for_sync: Wait for disk to synchronize
935
    @rtype: string
936
    @return: job id
937

938
    """
939
    body = {
940
      "amount": amount,
941
      }
942

    
943
    _SetItemIf(body, wait_for_sync is not None, "wait_for_sync", wait_for_sync)
944

    
945
    return self._SendRequest(HTTP_POST,
946
                             ("/%s/instances/%s/disk/%s/grow" %
947
                              (GANETI_RAPI_VERSION, instance, disk)),
948
                             None, body)
949

    
950
  def GetInstanceTags(self, instance):
951
    """Gets tags for an instance.
952

953
    @type instance: str
954
    @param instance: instance whose tags to return
955

956
    @rtype: list of str
957
    @return: tags for the instance
958

959
    """
960
    return self._SendRequest(HTTP_GET,
961
                             ("/%s/instances/%s/tags" %
962
                              (GANETI_RAPI_VERSION, instance)), None, None)
963

    
964
  def AddInstanceTags(self, instance, tags, dry_run=False):
965
    """Adds tags to an instance.
966

967
    @type instance: str
968
    @param instance: instance to add tags to
969
    @type tags: list of str
970
    @param tags: tags to add to the instance
971
    @type dry_run: bool
972
    @param dry_run: whether to perform a dry run
973

974
    @rtype: string
975
    @return: job id
976

977
    """
978
    query = [("tag", t) for t in tags]
979
    _AppendDryRunIf(query, dry_run)
980

    
981
    return self._SendRequest(HTTP_PUT,
982
                             ("/%s/instances/%s/tags" %
983
                              (GANETI_RAPI_VERSION, instance)), query, None)
984

    
985
  def DeleteInstanceTags(self, instance, tags, dry_run=False):
986
    """Deletes tags from an instance.
987

988
    @type instance: str
989
    @param instance: instance to delete tags from
990
    @type tags: list of str
991
    @param tags: tags to delete
992
    @type dry_run: bool
993
    @param dry_run: whether to perform a dry run
994
    @rtype: string
995
    @return: job id
996

997
    """
998
    query = [("tag", t) for t in tags]
999
    _AppendDryRunIf(query, dry_run)
1000

    
1001
    return self._SendRequest(HTTP_DELETE,
1002
                             ("/%s/instances/%s/tags" %
1003
                              (GANETI_RAPI_VERSION, instance)), query, None)
1004

    
1005
  def RebootInstance(self, instance, reboot_type=None, ignore_secondaries=None,
1006
                     dry_run=False, reason=None, **kwargs):
1007
    """Reboots an instance.
1008

1009
    @type instance: str
1010
    @param instance: instance to reboot
1011
    @type reboot_type: str
1012
    @param reboot_type: one of: hard, soft, full
1013
    @type ignore_secondaries: bool
1014
    @param ignore_secondaries: if True, ignores errors for the secondary node
1015
        while re-assembling disks (in hard-reboot mode only)
1016
    @type dry_run: bool
1017
    @param dry_run: whether to perform a dry run
1018
    @type reason: string
1019
    @param reason: the reason for the reboot
1020
    @rtype: string
1021
    @return: job id
1022

1023
    """
1024
    query = []
1025
    body = kwargs
1026

    
1027
    _AppendDryRunIf(query, dry_run)
1028
    _AppendIf(query, reboot_type, ("type", reboot_type))
1029
    _AppendIf(query, ignore_secondaries is not None,
1030
              ("ignore_secondaries", ignore_secondaries))
1031
    _AppendIf(query, reason, ("reason", reason))
1032

    
1033
    return self._SendRequest(HTTP_POST,
1034
                             ("/%s/instances/%s/reboot" %
1035
                              (GANETI_RAPI_VERSION, instance)), query, body)
1036

    
1037
  def ShutdownInstance(self, instance, dry_run=False, no_remember=False,
1038
                       reason=None, **kwargs):
1039
    """Shuts down an instance.
1040

1041
    @type instance: str
1042
    @param instance: the instance to shut down
1043
    @type dry_run: bool
1044
    @param dry_run: whether to perform a dry run
1045
    @type no_remember: bool
1046
    @param no_remember: if true, will not record the state change
1047
    @type reason: string
1048
    @param reason: the reason for the shutdown
1049
    @rtype: string
1050
    @return: job id
1051

1052
    """
1053
    query = []
1054
    body = kwargs
1055

    
1056
    _AppendDryRunIf(query, dry_run)
1057
    _AppendIf(query, no_remember, ("no_remember", 1))
1058
    _AppendIf(query, reason, ("reason", reason))
1059

    
1060
    return self._SendRequest(HTTP_PUT,
1061
                             ("/%s/instances/%s/shutdown" %
1062
                              (GANETI_RAPI_VERSION, instance)), query, body)
1063

    
1064
  def StartupInstance(self, instance, dry_run=False, no_remember=False,
1065
                      reason=None):
1066
    """Starts up an instance.
1067

1068
    @type instance: str
1069
    @param instance: the instance to start up
1070
    @type dry_run: bool
1071
    @param dry_run: whether to perform a dry run
1072
    @type no_remember: bool
1073
    @param no_remember: if true, will not record the state change
1074
    @type reason: string
1075
    @param reason: the reason for the startup
1076
    @rtype: string
1077
    @return: job id
1078

1079
    """
1080
    query = []
1081
    _AppendDryRunIf(query, dry_run)
1082
    _AppendIf(query, no_remember, ("no_remember", 1))
1083
    _AppendIf(query, reason, ("reason", reason))
1084

    
1085
    return self._SendRequest(HTTP_PUT,
1086
                             ("/%s/instances/%s/startup" %
1087
                              (GANETI_RAPI_VERSION, instance)), query, None)
1088

    
1089
  def ReinstallInstance(self, instance, os=None, no_startup=False,
1090
                        osparams=None):
1091
    """Reinstalls an instance.
1092

1093
    @type instance: str
1094
    @param instance: The instance to reinstall
1095
    @type os: str or None
1096
    @param os: The operating system to reinstall. If None, the instance's
1097
        current operating system will be installed again
1098
    @type no_startup: bool
1099
    @param no_startup: Whether to start the instance automatically
1100
    @rtype: string
1101
    @return: job id
1102

1103
    """
1104
    if _INST_REINSTALL_REQV1 in self.GetFeatures():
1105
      body = {
1106
        "start": not no_startup,
1107
        }
1108
      _SetItemIf(body, os is not None, "os", os)
1109
      _SetItemIf(body, osparams is not None, "osparams", osparams)
1110
      return self._SendRequest(HTTP_POST,
1111
                               ("/%s/instances/%s/reinstall" %
1112
                                (GANETI_RAPI_VERSION, instance)), None, body)
1113

    
1114
    # Use old request format
1115
    if osparams:
1116
      raise GanetiApiError("Server does not support specifying OS parameters"
1117
                           " for instance reinstallation")
1118

    
1119
    query = []
1120
    _AppendIf(query, os, ("os", os))
1121
    _AppendIf(query, no_startup, ("nostartup", 1))
1122

    
1123
    return self._SendRequest(HTTP_POST,
1124
                             ("/%s/instances/%s/reinstall" %
1125
                              (GANETI_RAPI_VERSION, instance)), query, None)
1126

    
1127
  def ReplaceInstanceDisks(self, instance, disks=None, mode=REPLACE_DISK_AUTO,
1128
                           remote_node=None, iallocator=None):
1129
    """Replaces disks on an instance.
1130

1131
    @type instance: str
1132
    @param instance: instance whose disks to replace
1133
    @type disks: list of ints
1134
    @param disks: Indexes of disks to replace
1135
    @type mode: str
1136
    @param mode: replacement mode to use (defaults to replace_auto)
1137
    @type remote_node: str or None
1138
    @param remote_node: new secondary node to use (for use with
1139
        replace_new_secondary mode)
1140
    @type iallocator: str or None
1141
    @param iallocator: instance allocator plugin to use (for use with
1142
                       replace_auto mode)
1143

1144
    @rtype: string
1145
    @return: job id
1146

1147
    """
1148
    query = [
1149
      ("mode", mode),
1150
      ]
1151

    
1152
    # TODO: Convert to body parameters
1153

    
1154
    if disks is not None:
1155
      _AppendIf(query, True,
1156
                ("disks", ",".join(str(idx) for idx in disks)))
1157

    
1158
    _AppendIf(query, remote_node is not None, ("remote_node", remote_node))
1159
    _AppendIf(query, iallocator is not None, ("iallocator", iallocator))
1160

    
1161
    return self._SendRequest(HTTP_POST,
1162
                             ("/%s/instances/%s/replace-disks" %
1163
                              (GANETI_RAPI_VERSION, instance)), query, None)
1164

    
1165
  def PrepareExport(self, instance, mode):
1166
    """Prepares an instance for an export.
1167

1168
    @type instance: string
1169
    @param instance: Instance name
1170
    @type mode: string
1171
    @param mode: Export mode
1172
    @rtype: string
1173
    @return: Job ID
1174

1175
    """
1176
    query = [("mode", mode)]
1177
    return self._SendRequest(HTTP_PUT,
1178
                             ("/%s/instances/%s/prepare-export" %
1179
                              (GANETI_RAPI_VERSION, instance)), query, None)
1180

    
1181
  def ExportInstance(self, instance, mode, destination, shutdown=None,
1182
                     remove_instance=None,
1183
                     x509_key_name=None, destination_x509_ca=None,
1184
                     compress=None):
1185
    """Exports an instance.
1186

1187
    @type instance: string
1188
    @param instance: Instance name
1189
    @type mode: string
1190
    @param mode: Export mode
1191
    @rtype: string
1192
    @return: Job ID
1193

1194
    """
1195
    body = {
1196
      "destination": destination,
1197
      "mode": mode,
1198
      }
1199

    
1200
    _SetItemIf(body, shutdown is not None, "shutdown", shutdown)
1201
    _SetItemIf(body, remove_instance is not None,
1202
               "remove_instance", remove_instance)
1203
    _SetItemIf(body, x509_key_name is not None, "x509_key_name", x509_key_name)
1204
    _SetItemIf(body, destination_x509_ca is not None,
1205
               "destination_x509_ca", destination_x509_ca)
1206
    _SetItemIf(body, compress is not None, "compress", compress)
1207

    
1208
    return self._SendRequest(HTTP_PUT,
1209
                             ("/%s/instances/%s/export" %
1210
                              (GANETI_RAPI_VERSION, instance)), None, body)
1211

    
1212
  def MigrateInstance(self, instance, mode=None, cleanup=None,
1213
                      target_node=None):
1214
    """Migrates an instance.
1215

1216
    @type instance: string
1217
    @param instance: Instance name
1218
    @type mode: string
1219
    @param mode: Migration mode
1220
    @type cleanup: bool
1221
    @param cleanup: Whether to clean up a previously failed migration
1222
    @type target_node: string
1223
    @param target_node: Target Node for externally mirrored instances
1224
    @rtype: string
1225
    @return: job id
1226

1227
    """
1228
    body = {}
1229
    _SetItemIf(body, mode is not None, "mode", mode)
1230
    _SetItemIf(body, cleanup is not None, "cleanup", cleanup)
1231
    _SetItemIf(body, target_node is not None, "target_node", target_node)
1232

    
1233
    return self._SendRequest(HTTP_PUT,
1234
                             ("/%s/instances/%s/migrate" %
1235
                              (GANETI_RAPI_VERSION, instance)), None, body)
1236

    
1237
  def FailoverInstance(self, instance, iallocator=None,
1238
                       ignore_consistency=None, target_node=None):
1239
    """Does a failover of an instance.
1240

1241
    @type instance: string
1242
    @param instance: Instance name
1243
    @type iallocator: string
1244
    @param iallocator: Iallocator for deciding the target node for
1245
      shared-storage instances
1246
    @type ignore_consistency: bool
1247
    @param ignore_consistency: Whether to ignore disk consistency
1248
    @type target_node: string
1249
    @param target_node: Target node for shared-storage instances
1250
    @rtype: string
1251
    @return: job id
1252

1253
    """
1254
    body = {}
1255
    _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
1256
    _SetItemIf(body, ignore_consistency is not None,
1257
               "ignore_consistency", ignore_consistency)
1258
    _SetItemIf(body, target_node is not None, "target_node", target_node)
1259

    
1260
    return self._SendRequest(HTTP_PUT,
1261
                             ("/%s/instances/%s/failover" %
1262
                              (GANETI_RAPI_VERSION, instance)), None, body)
1263

    
1264
  def RenameInstance(self, instance, new_name, ip_check=None, name_check=None):
1265
    """Changes the name of an instance.
1266

1267
    @type instance: string
1268
    @param instance: Instance name
1269
    @type new_name: string
1270
    @param new_name: New instance name
1271
    @type ip_check: bool
1272
    @param ip_check: Whether to ensure instance's IP address is inactive
1273
    @type name_check: bool
1274
    @param name_check: Whether to ensure instance's name is resolvable
1275
    @rtype: string
1276
    @return: job id
1277

1278
    """
1279
    body = {
1280
      "new_name": new_name,
1281
      }
1282

    
1283
    _SetItemIf(body, ip_check is not None, "ip_check", ip_check)
1284
    _SetItemIf(body, name_check is not None, "name_check", name_check)
1285

    
1286
    return self._SendRequest(HTTP_PUT,
1287
                             ("/%s/instances/%s/rename" %
1288
                              (GANETI_RAPI_VERSION, instance)), None, body)
1289

    
1290
  def GetInstanceConsole(self, instance):
1291
    """Request information for connecting to instance's console.
1292

1293
    @type instance: string
1294
    @param instance: Instance name
1295
    @rtype: dict
1296
    @return: dictionary containing information about instance's console
1297

1298
    """
1299
    return self._SendRequest(HTTP_GET,
1300
                             ("/%s/instances/%s/console" %
1301
                              (GANETI_RAPI_VERSION, instance)), None, None)
1302

    
1303
  def GetJobs(self, bulk=False):
1304
    """Gets all jobs for the cluster.
1305

1306
    @type bulk: bool
1307
    @param bulk: Whether to return detailed information about jobs.
1308
    @rtype: list of int
1309
    @return: List of job ids for the cluster or list of dicts with detailed
1310
             information about the jobs if bulk parameter was true.
1311

1312
    """
1313
    query = []
1314
    _AppendIf(query, bulk, ("bulk", 1))
1315

    
1316
    if bulk:
1317
      return self._SendRequest(HTTP_GET,
1318
                               "/%s/jobs" % GANETI_RAPI_VERSION,
1319
                               query, None)
1320
    else:
1321
      return [int(j["id"])
1322
              for j in self._SendRequest(HTTP_GET,
1323
                                         "/%s/jobs" % GANETI_RAPI_VERSION,
1324
                                         None, None)]
1325

    
1326
  def GetJobStatus(self, job_id):
1327
    """Gets the status of a job.
1328

1329
    @type job_id: string
1330
    @param job_id: job id whose status to query
1331

1332
    @rtype: dict
1333
    @return: job status
1334

1335
    """
1336
    return self._SendRequest(HTTP_GET,
1337
                             "/%s/jobs/%s" % (GANETI_RAPI_VERSION, job_id),
1338
                             None, None)
1339

    
1340
  def WaitForJobCompletion(self, job_id, period=5, retries=-1):
1341
    """Polls cluster for job status until completion.
1342

1343
    Completion is defined as any of the following states listed in
1344
    L{JOB_STATUS_FINALIZED}.
1345

1346
    @type job_id: string
1347
    @param job_id: job id to watch
1348
    @type period: int
1349
    @param period: how often to poll for status (optional, default 5s)
1350
    @type retries: int
1351
    @param retries: how many time to poll before giving up
1352
                    (optional, default -1 means unlimited)
1353

1354
    @rtype: bool
1355
    @return: C{True} if job succeeded or C{False} if failed/status timeout
1356
    @deprecated: It is recommended to use L{WaitForJobChange} wherever
1357
      possible; L{WaitForJobChange} returns immediately after a job changed and
1358
      does not use polling
1359

1360
    """
1361
    while retries != 0:
1362
      job_result = self.GetJobStatus(job_id)
1363

    
1364
      if job_result and job_result["status"] == JOB_STATUS_SUCCESS:
1365
        return True
1366
      elif not job_result or job_result["status"] in JOB_STATUS_FINALIZED:
1367
        return False
1368

    
1369
      if period:
1370
        time.sleep(period)
1371

    
1372
      if retries > 0:
1373
        retries -= 1
1374

    
1375
    return False
1376

    
1377
  def WaitForJobChange(self, job_id, fields, prev_job_info, prev_log_serial):
1378
    """Waits for job changes.
1379

1380
    @type job_id: string
1381
    @param job_id: Job ID for which to wait
1382
    @return: C{None} if no changes have been detected and a dict with two keys,
1383
      C{job_info} and C{log_entries} otherwise.
1384
    @rtype: dict
1385

1386
    """
1387
    body = {
1388
      "fields": fields,
1389
      "previous_job_info": prev_job_info,
1390
      "previous_log_serial": prev_log_serial,
1391
      }
1392

    
1393
    return self._SendRequest(HTTP_GET,
1394
                             "/%s/jobs/%s/wait" % (GANETI_RAPI_VERSION, job_id),
1395
                             None, body)
1396

    
1397
  def CancelJob(self, job_id, dry_run=False):
1398
    """Cancels a job.
1399

1400
    @type job_id: string
1401
    @param job_id: id of the job to delete
1402
    @type dry_run: bool
1403
    @param dry_run: whether to perform a dry run
1404
    @rtype: tuple
1405
    @return: tuple containing the result, and a message (bool, string)
1406

1407
    """
1408
    query = []
1409
    _AppendDryRunIf(query, dry_run)
1410

    
1411
    return self._SendRequest(HTTP_DELETE,
1412
                             "/%s/jobs/%s" % (GANETI_RAPI_VERSION, job_id),
1413
                             query, None)
1414

    
1415
  def GetNodes(self, bulk=False):
1416
    """Gets all nodes in the cluster.
1417

1418
    @type bulk: bool
1419
    @param bulk: whether to return all information about all instances
1420

1421
    @rtype: list of dict or str
1422
    @return: if bulk is true, info about nodes in the cluster,
1423
        else list of nodes in the cluster
1424

1425
    """
1426
    query = []
1427
    _AppendIf(query, bulk, ("bulk", 1))
1428

    
1429
    nodes = self._SendRequest(HTTP_GET, "/%s/nodes" % GANETI_RAPI_VERSION,
1430
                              query, None)
1431
    if bulk:
1432
      return nodes
1433
    else:
1434
      return [n["id"] for n in nodes]
1435

    
1436
  def GetNode(self, node):
1437
    """Gets information about a node.
1438

1439
    @type node: str
1440
    @param node: node whose info to return
1441

1442
    @rtype: dict
1443
    @return: info about the node
1444

1445
    """
1446
    return self._SendRequest(HTTP_GET,
1447
                             "/%s/nodes/%s" % (GANETI_RAPI_VERSION, node),
1448
                             None, None)
1449

    
1450
  def EvacuateNode(self, node, iallocator=None, remote_node=None,
1451
                   dry_run=False, early_release=None,
1452
                   mode=None, accept_old=False):
1453
    """Evacuates instances from a Ganeti node.
1454

1455
    @type node: str
1456
    @param node: node to evacuate
1457
    @type iallocator: str or None
1458
    @param iallocator: instance allocator to use
1459
    @type remote_node: str
1460
    @param remote_node: node to evaucate to
1461
    @type dry_run: bool
1462
    @param dry_run: whether to perform a dry run
1463
    @type early_release: bool
1464
    @param early_release: whether to enable parallelization
1465
    @type mode: string
1466
    @param mode: Node evacuation mode
1467
    @type accept_old: bool
1468
    @param accept_old: Whether caller is ready to accept old-style (pre-2.5)
1469
        results
1470

1471
    @rtype: string, or a list for pre-2.5 results
1472
    @return: Job ID or, if C{accept_old} is set and server is pre-2.5,
1473
      list of (job ID, instance name, new secondary node); if dry_run was
1474
      specified, then the actual move jobs were not submitted and the job IDs
1475
      will be C{None}
1476

1477
    @raises GanetiApiError: if an iallocator and remote_node are both
1478
        specified
1479

1480
    """
1481
    if iallocator and remote_node:
1482
      raise GanetiApiError("Only one of iallocator or remote_node can be used")
1483

    
1484
    query = []
1485
    _AppendDryRunIf(query, dry_run)
1486

    
1487
    if _NODE_EVAC_RES1 in self.GetFeatures():
1488
      # Server supports body parameters
1489
      body = {}
1490

    
1491
      _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
1492
      _SetItemIf(body, remote_node is not None, "remote_node", remote_node)
1493
      _SetItemIf(body, early_release is not None,
1494
                 "early_release", early_release)
1495
      _SetItemIf(body, mode is not None, "mode", mode)
1496
    else:
1497
      # Pre-2.5 request format
1498
      body = None
1499

    
1500
      if not accept_old:
1501
        raise GanetiApiError("Server is version 2.4 or earlier and caller does"
1502
                             " not accept old-style results (parameter"
1503
                             " accept_old)")
1504

    
1505
      # Pre-2.5 servers can only evacuate secondaries
1506
      if mode is not None and mode != NODE_EVAC_SEC:
1507
        raise GanetiApiError("Server can only evacuate secondary instances")
1508

    
1509
      _AppendIf(query, iallocator, ("iallocator", iallocator))
1510
      _AppendIf(query, remote_node, ("remote_node", remote_node))
1511
      _AppendIf(query, early_release, ("early_release", 1))
1512

    
1513
    return self._SendRequest(HTTP_POST,
1514
                             ("/%s/nodes/%s/evacuate" %
1515
                              (GANETI_RAPI_VERSION, node)), query, body)
1516

    
1517
  def MigrateNode(self, node, mode=None, dry_run=False, iallocator=None,
1518
                  target_node=None):
1519
    """Migrates all primary instances from a node.
1520

1521
    @type node: str
1522
    @param node: node to migrate
1523
    @type mode: string
1524
    @param mode: if passed, it will overwrite the live migration type,
1525
        otherwise the hypervisor default will be used
1526
    @type dry_run: bool
1527
    @param dry_run: whether to perform a dry run
1528
    @type iallocator: string
1529
    @param iallocator: instance allocator to use
1530
    @type target_node: string
1531
    @param target_node: Target node for shared-storage instances
1532

1533
    @rtype: string
1534
    @return: job id
1535

1536
    """
1537
    query = []
1538
    _AppendDryRunIf(query, dry_run)
1539

    
1540
    if _NODE_MIGRATE_REQV1 in self.GetFeatures():
1541
      body = {}
1542

    
1543
      _SetItemIf(body, mode is not None, "mode", mode)
1544
      _SetItemIf(body, iallocator is not None, "iallocator", iallocator)
1545
      _SetItemIf(body, target_node is not None, "target_node", target_node)
1546

    
1547
      assert len(query) <= 1
1548

    
1549
      return self._SendRequest(HTTP_POST,
1550
                               ("/%s/nodes/%s/migrate" %
1551
                                (GANETI_RAPI_VERSION, node)), query, body)
1552
    else:
1553
      # Use old request format
1554
      if target_node is not None:
1555
        raise GanetiApiError("Server does not support specifying target node"
1556
                             " for node migration")
1557

    
1558
      _AppendIf(query, mode is not None, ("mode", mode))
1559

    
1560
      return self._SendRequest(HTTP_POST,
1561
                               ("/%s/nodes/%s/migrate" %
1562
                                (GANETI_RAPI_VERSION, node)), query, None)
1563

    
1564
  def GetNodeRole(self, node):
1565
    """Gets the current role for a node.
1566

1567
    @type node: str
1568
    @param node: node whose role to return
1569

1570
    @rtype: str
1571
    @return: the current role for a node
1572

1573
    """
1574
    return self._SendRequest(HTTP_GET,
1575
                             ("/%s/nodes/%s/role" %
1576
                              (GANETI_RAPI_VERSION, node)), None, None)
1577

    
1578
  def SetNodeRole(self, node, role, force=False, auto_promote=None):
1579
    """Sets the role for a node.
1580

1581
    @type node: str
1582
    @param node: the node whose role to set
1583
    @type role: str
1584
    @param role: the role to set for the node
1585
    @type force: bool
1586
    @param force: whether to force the role change
1587
    @type auto_promote: bool
1588
    @param auto_promote: Whether node(s) should be promoted to master candidate
1589
                         if necessary
1590

1591
    @rtype: string
1592
    @return: job id
1593

1594
    """
1595
    query = []
1596
    _AppendForceIf(query, force)
1597
    _AppendIf(query, auto_promote is not None, ("auto-promote", auto_promote))
1598

    
1599
    return self._SendRequest(HTTP_PUT,
1600
                             ("/%s/nodes/%s/role" %
1601
                              (GANETI_RAPI_VERSION, node)), query, role)
1602

    
1603
  def PowercycleNode(self, node, force=False):
1604
    """Powercycles a node.
1605

1606
    @type node: string
1607
    @param node: Node name
1608
    @type force: bool
1609
    @param force: Whether to force the operation
1610
    @rtype: string
1611
    @return: job id
1612

1613
    """
1614
    query = []
1615
    _AppendForceIf(query, force)
1616

    
1617
    return self._SendRequest(HTTP_POST,
1618
                             ("/%s/nodes/%s/powercycle" %
1619
                              (GANETI_RAPI_VERSION, node)), query, None)
1620

    
1621
  def ModifyNode(self, node, **kwargs):
1622
    """Modifies a node.
1623

1624
    More details for parameters can be found in the RAPI documentation.
1625

1626
    @type node: string
1627
    @param node: Node name
1628
    @rtype: string
1629
    @return: job id
1630

1631
    """
1632
    return self._SendRequest(HTTP_POST,
1633
                             ("/%s/nodes/%s/modify" %
1634
                              (GANETI_RAPI_VERSION, node)), None, kwargs)
1635

    
1636
  def GetNodeStorageUnits(self, node, storage_type, output_fields):
1637
    """Gets the storage units for a node.
1638

1639
    @type node: str
1640
    @param node: the node whose storage units to return
1641
    @type storage_type: str
1642
    @param storage_type: storage type whose units to return
1643
    @type output_fields: str
1644
    @param output_fields: storage type fields to return
1645

1646
    @rtype: string
1647
    @return: job id where results can be retrieved
1648

1649
    """
1650
    query = [
1651
      ("storage_type", storage_type),
1652
      ("output_fields", output_fields),
1653
      ]
1654

    
1655
    return self._SendRequest(HTTP_GET,
1656
                             ("/%s/nodes/%s/storage" %
1657
                              (GANETI_RAPI_VERSION, node)), query, None)
1658

    
1659
  def ModifyNodeStorageUnits(self, node, storage_type, name, allocatable=None):
1660
    """Modifies parameters of storage units on the node.
1661

1662
    @type node: str
1663
    @param node: node whose storage units to modify
1664
    @type storage_type: str
1665
    @param storage_type: storage type whose units to modify
1666
    @type name: str
1667
    @param name: name of the storage unit
1668
    @type allocatable: bool or None
1669
    @param allocatable: Whether to set the "allocatable" flag on the storage
1670
                        unit (None=no modification, True=set, False=unset)
1671

1672
    @rtype: string
1673
    @return: job id
1674

1675
    """
1676
    query = [
1677
      ("storage_type", storage_type),
1678
      ("name", name),
1679
      ]
1680

    
1681
    _AppendIf(query, allocatable is not None, ("allocatable", allocatable))
1682

    
1683
    return self._SendRequest(HTTP_PUT,
1684
                             ("/%s/nodes/%s/storage/modify" %
1685
                              (GANETI_RAPI_VERSION, node)), query, None)
1686

    
1687
  def RepairNodeStorageUnits(self, node, storage_type, name):
1688
    """Repairs a storage unit on the node.
1689

1690
    @type node: str
1691
    @param node: node whose storage units to repair
1692
    @type storage_type: str
1693
    @param storage_type: storage type to repair
1694
    @type name: str
1695
    @param name: name of the storage unit to repair
1696

1697
    @rtype: string
1698
    @return: job id
1699

1700
    """
1701
    query = [
1702
      ("storage_type", storage_type),
1703
      ("name", name),
1704
      ]
1705

    
1706
    return self._SendRequest(HTTP_PUT,
1707
                             ("/%s/nodes/%s/storage/repair" %
1708
                              (GANETI_RAPI_VERSION, node)), query, None)
1709

    
1710
  def GetNodeTags(self, node):
1711
    """Gets the tags for a node.
1712

1713
    @type node: str
1714
    @param node: node whose tags to return
1715

1716
    @rtype: list of str
1717
    @return: tags for the node
1718

1719
    """
1720
    return self._SendRequest(HTTP_GET,
1721
                             ("/%s/nodes/%s/tags" %
1722
                              (GANETI_RAPI_VERSION, node)), None, None)
1723

    
1724
  def AddNodeTags(self, node, tags, dry_run=False):
1725
    """Adds tags to a node.
1726

1727
    @type node: str
1728
    @param node: node to add tags to
1729
    @type tags: list of str
1730
    @param tags: tags to add to the node
1731
    @type dry_run: bool
1732
    @param dry_run: whether to perform a dry run
1733

1734
    @rtype: string
1735
    @return: job id
1736

1737
    """
1738
    query = [("tag", t) for t in tags]
1739
    _AppendDryRunIf(query, dry_run)
1740

    
1741
    return self._SendRequest(HTTP_PUT,
1742
                             ("/%s/nodes/%s/tags" %
1743
                              (GANETI_RAPI_VERSION, node)), query, tags)
1744

    
1745
  def DeleteNodeTags(self, node, tags, dry_run=False):
1746
    """Delete tags from a node.
1747

1748
    @type node: str
1749
    @param node: node to remove tags from
1750
    @type tags: list of str
1751
    @param tags: tags to remove from the node
1752
    @type dry_run: bool
1753
    @param dry_run: whether to perform a dry run
1754

1755
    @rtype: string
1756
    @return: job id
1757

1758
    """
1759
    query = [("tag", t) for t in tags]
1760
    _AppendDryRunIf(query, dry_run)
1761

    
1762
    return self._SendRequest(HTTP_DELETE,
1763
                             ("/%s/nodes/%s/tags" %
1764
                              (GANETI_RAPI_VERSION, node)), query, None)
1765

    
1766
  def GetNetworks(self, bulk=False):
1767
    """Gets all networks in the cluster.
1768

1769
    @type bulk: bool
1770
    @param bulk: whether to return all information about the networks
1771

1772
    @rtype: list of dict or str
1773
    @return: if bulk is true, a list of dictionaries with info about all
1774
        networks in the cluster, else a list of names of those networks
1775

1776
    """
1777
    query = []
1778
    _AppendIf(query, bulk, ("bulk", 1))
1779

    
1780
    networks = self._SendRequest(HTTP_GET, "/%s/networks" % GANETI_RAPI_VERSION,
1781
                                 query, None)
1782
    if bulk:
1783
      return networks
1784
    else:
1785
      return [n["name"] for n in networks]
1786

    
1787
  def GetNetwork(self, network):
1788
    """Gets information about a network.
1789

1790
    @type network: str
1791
    @param network: name of the network whose info to return
1792

1793
    @rtype: dict
1794
    @return: info about the network
1795

1796
    """
1797
    return self._SendRequest(HTTP_GET,
1798
                             "/%s/networks/%s" % (GANETI_RAPI_VERSION, network),
1799
                             None, None)
1800

    
1801
  def CreateNetwork(self, network_name, network, gateway=None, network6=None,
1802
                    gateway6=None, mac_prefix=None,
1803
                    add_reserved_ips=None, tags=None, dry_run=False):
1804
    """Creates a new network.
1805

1806
    @type network_name: str
1807
    @param network_name: the name of network to create
1808
    @type dry_run: bool
1809
    @param dry_run: whether to peform a dry run
1810

1811
    @rtype: string
1812
    @return: job id
1813

1814
    """
1815
    query = []
1816
    _AppendDryRunIf(query, dry_run)
1817

    
1818
    if add_reserved_ips:
1819
      add_reserved_ips = add_reserved_ips.split(",")
1820

    
1821
    if tags:
1822
      tags = tags.split(",")
1823

    
1824
    body = {
1825
      "network_name": network_name,
1826
      "gateway": gateway,
1827
      "network": network,
1828
      "gateway6": gateway6,
1829
      "network6": network6,
1830
      "mac_prefix": mac_prefix,
1831
      "add_reserved_ips": add_reserved_ips,
1832
      "tags": tags,
1833
      }
1834

    
1835
    return self._SendRequest(HTTP_POST, "/%s/networks" % GANETI_RAPI_VERSION,
1836
                             query, body)
1837

    
1838
  def ConnectNetwork(self, network_name, group_name, mode, link, dry_run=False):
1839
    """Connects a Network to a NodeGroup with the given netparams
1840

1841
    """
1842
    body = {
1843
      "group_name": group_name,
1844
      "network_mode": mode,
1845
      "network_link": link,
1846
      }
1847

    
1848
    query = []
1849
    _AppendDryRunIf(query, dry_run)
1850

    
1851
    return self._SendRequest(HTTP_PUT,
1852
                             ("/%s/networks/%s/connect" %
1853
                             (GANETI_RAPI_VERSION, network_name)), query, body)
1854

    
1855
  def DisconnectNetwork(self, network_name, group_name, dry_run=False):
1856
    """Connects a Network to a NodeGroup with the given netparams
1857

1858
    """
1859
    body = {
1860
      "group_name": group_name,
1861
      }
1862

    
1863
    query = []
1864
    _AppendDryRunIf(query, dry_run)
1865

    
1866
    return self._SendRequest(HTTP_PUT,
1867
                             ("/%s/networks/%s/disconnect" %
1868
                             (GANETI_RAPI_VERSION, network_name)), query, body)
1869

    
1870
  def ModifyNetwork(self, network, **kwargs):
1871
    """Modifies a network.
1872

1873
    More details for parameters can be found in the RAPI documentation.
1874

1875
    @type network: string
1876
    @param network: Network name
1877
    @rtype: string
1878
    @return: job id
1879

1880
    """
1881
    return self._SendRequest(HTTP_PUT,
1882
                             ("/%s/networks/%s/modify" %
1883
                              (GANETI_RAPI_VERSION, network)), None, kwargs)
1884

    
1885
  def DeleteNetwork(self, network, dry_run=False):
1886
    """Deletes a network.
1887

1888
    @type network: str
1889
    @param network: the network to delete
1890
    @type dry_run: bool
1891
    @param dry_run: whether to peform a dry run
1892

1893
    @rtype: string
1894
    @return: job id
1895

1896
    """
1897
    query = []
1898
    _AppendDryRunIf(query, dry_run)
1899

    
1900
    return self._SendRequest(HTTP_DELETE,
1901
                             ("/%s/networks/%s" %
1902
                              (GANETI_RAPI_VERSION, network)), query, None)
1903

    
1904
  def GetNetworkTags(self, network):
1905
    """Gets tags for a network.
1906

1907
    @type network: string
1908
    @param network: Node group whose tags to return
1909

1910
    @rtype: list of strings
1911
    @return: tags for the network
1912

1913
    """
1914
    return self._SendRequest(HTTP_GET,
1915
                             ("/%s/networks/%s/tags" %
1916
                              (GANETI_RAPI_VERSION, network)), None, None)
1917

    
1918
  def AddNetworkTags(self, network, tags, dry_run=False):
1919
    """Adds tags to a network.
1920

1921
    @type network: str
1922
    @param network: network to add tags to
1923
    @type tags: list of string
1924
    @param tags: tags to add to the network
1925
    @type dry_run: bool
1926
    @param dry_run: whether to perform a dry run
1927

1928
    @rtype: string
1929
    @return: job id
1930

1931
    """
1932
    query = [("tag", t) for t in tags]
1933
    _AppendDryRunIf(query, dry_run)
1934

    
1935
    return self._SendRequest(HTTP_PUT,
1936
                             ("/%s/networks/%s/tags" %
1937
                              (GANETI_RAPI_VERSION, network)), query, None)
1938

    
1939
  def DeleteNetworkTags(self, network, tags, dry_run=False):
1940
    """Deletes tags from a network.
1941

1942
    @type network: str
1943
    @param network: network to delete tags from
1944
    @type tags: list of string
1945
    @param tags: tags to delete
1946
    @type dry_run: bool
1947
    @param dry_run: whether to perform a dry run
1948
    @rtype: string
1949
    @return: job id
1950

1951
    """
1952
    query = [("tag", t) for t in tags]
1953
    _AppendDryRunIf(query, dry_run)
1954

    
1955
    return self._SendRequest(HTTP_DELETE,
1956
                             ("/%s/networks/%s/tags" %
1957
                              (GANETI_RAPI_VERSION, network)), query, None)
1958

    
1959
  def GetGroups(self, bulk=False):
1960
    """Gets all node groups in the cluster.
1961

1962
    @type bulk: bool
1963
    @param bulk: whether to return all information about the groups
1964

1965
    @rtype: list of dict or str
1966
    @return: if bulk is true, a list of dictionaries with info about all node
1967
        groups in the cluster, else a list of names of those node groups
1968

1969
    """
1970
    query = []
1971
    _AppendIf(query, bulk, ("bulk", 1))
1972

    
1973
    groups = self._SendRequest(HTTP_GET, "/%s/groups" % GANETI_RAPI_VERSION,
1974
                               query, None)
1975
    if bulk:
1976
      return groups
1977
    else:
1978
      return [g["name"] for g in groups]
1979

    
1980
  def GetGroup(self, group):
1981
    """Gets information about a node group.
1982

1983
    @type group: str
1984
    @param group: name of the node group whose info to return
1985

1986
    @rtype: dict
1987
    @return: info about the node group
1988

1989
    """
1990
    return self._SendRequest(HTTP_GET,
1991
                             "/%s/groups/%s" % (GANETI_RAPI_VERSION, group),
1992
                             None, None)
1993

    
1994
  def CreateGroup(self, name, alloc_policy=None, dry_run=False):
1995
    """Creates a new node group.
1996

1997
    @type name: str
1998
    @param name: the name of node group to create
1999
    @type alloc_policy: str
2000
    @param alloc_policy: the desired allocation policy for the group, if any
2001
    @type dry_run: bool
2002
    @param dry_run: whether to peform a dry run
2003

2004
    @rtype: string
2005
    @return: job id
2006

2007
    """
2008
    query = []
2009
    _AppendDryRunIf(query, dry_run)
2010

    
2011
    body = {
2012
      "name": name,
2013
      "alloc_policy": alloc_policy,
2014
      }
2015

    
2016
    return self._SendRequest(HTTP_POST, "/%s/groups" % GANETI_RAPI_VERSION,
2017
                             query, body)
2018

    
2019
  def ModifyGroup(self, group, **kwargs):
2020
    """Modifies a node group.
2021

2022
    More details for parameters can be found in the RAPI documentation.
2023

2024
    @type group: string
2025
    @param group: Node group name
2026
    @rtype: string
2027
    @return: job id
2028

2029
    """
2030
    return self._SendRequest(HTTP_PUT,
2031
                             ("/%s/groups/%s/modify" %
2032
                              (GANETI_RAPI_VERSION, group)), None, kwargs)
2033

    
2034
  def DeleteGroup(self, group, dry_run=False):
2035
    """Deletes a node group.
2036

2037
    @type group: str
2038
    @param group: the node group to delete
2039
    @type dry_run: bool
2040
    @param dry_run: whether to peform a dry run
2041

2042
    @rtype: string
2043
    @return: job id
2044

2045
    """
2046
    query = []
2047
    _AppendDryRunIf(query, dry_run)
2048

    
2049
    return self._SendRequest(HTTP_DELETE,
2050
                             ("/%s/groups/%s" %
2051
                              (GANETI_RAPI_VERSION, group)), query, None)
2052

    
2053
  def RenameGroup(self, group, new_name):
2054
    """Changes the name of a node group.
2055

2056
    @type group: string
2057
    @param group: Node group name
2058
    @type new_name: string
2059
    @param new_name: New node group name
2060

2061
    @rtype: string
2062
    @return: job id
2063

2064
    """
2065
    body = {
2066
      "new_name": new_name,
2067
      }
2068

    
2069
    return self._SendRequest(HTTP_PUT,
2070
                             ("/%s/groups/%s/rename" %
2071
                              (GANETI_RAPI_VERSION, group)), None, body)
2072

    
2073
  def AssignGroupNodes(self, group, nodes, force=False, dry_run=False):
2074
    """Assigns nodes to a group.
2075

2076
    @type group: string
2077
    @param group: Node group name
2078
    @type nodes: list of strings
2079
    @param nodes: List of nodes to assign to the group
2080

2081
    @rtype: string
2082
    @return: job id
2083

2084
    """
2085
    query = []
2086
    _AppendForceIf(query, force)
2087
    _AppendDryRunIf(query, dry_run)
2088

    
2089
    body = {
2090
      "nodes": nodes,
2091
      }
2092

    
2093
    return self._SendRequest(HTTP_PUT,
2094
                             ("/%s/groups/%s/assign-nodes" %
2095
                             (GANETI_RAPI_VERSION, group)), query, body)
2096

    
2097
  def GetGroupTags(self, group):
2098
    """Gets tags for a node group.
2099

2100
    @type group: string
2101
    @param group: Node group whose tags to return
2102

2103
    @rtype: list of strings
2104
    @return: tags for the group
2105

2106
    """
2107
    return self._SendRequest(HTTP_GET,
2108
                             ("/%s/groups/%s/tags" %
2109
                              (GANETI_RAPI_VERSION, group)), None, None)
2110

    
2111
  def AddGroupTags(self, group, tags, dry_run=False):
2112
    """Adds tags to a node group.
2113

2114
    @type group: str
2115
    @param group: group to add tags to
2116
    @type tags: list of string
2117
    @param tags: tags to add to the group
2118
    @type dry_run: bool
2119
    @param dry_run: whether to perform a dry run
2120

2121
    @rtype: string
2122
    @return: job id
2123

2124
    """
2125
    query = [("tag", t) for t in tags]
2126
    _AppendDryRunIf(query, dry_run)
2127

    
2128
    return self._SendRequest(HTTP_PUT,
2129
                             ("/%s/groups/%s/tags" %
2130
                              (GANETI_RAPI_VERSION, group)), query, None)
2131

    
2132
  def DeleteGroupTags(self, group, tags, dry_run=False):
2133
    """Deletes tags from a node group.
2134

2135
    @type group: str
2136
    @param group: group to delete tags from
2137
    @type tags: list of string
2138
    @param tags: tags to delete
2139
    @type dry_run: bool
2140
    @param dry_run: whether to perform a dry run
2141
    @rtype: string
2142
    @return: job id
2143

2144
    """
2145
    query = [("tag", t) for t in tags]
2146
    _AppendDryRunIf(query, dry_run)
2147

    
2148
    return self._SendRequest(HTTP_DELETE,
2149
                             ("/%s/groups/%s/tags" %
2150
                              (GANETI_RAPI_VERSION, group)), query, None)
2151

    
2152
  def Query(self, what, fields, qfilter=None):
2153
    """Retrieves information about resources.
2154

2155
    @type what: string
2156
    @param what: Resource name, one of L{constants.QR_VIA_RAPI}
2157
    @type fields: list of string
2158
    @param fields: Requested fields
2159
    @type qfilter: None or list
2160
    @param qfilter: Query filter
2161

2162
    @rtype: string
2163
    @return: job id
2164

2165
    """
2166
    body = {
2167
      "fields": fields,
2168
      }
2169

    
2170
    _SetItemIf(body, qfilter is not None, "qfilter", qfilter)
2171
    # TODO: remove "filter" after 2.7
2172
    _SetItemIf(body, qfilter is not None, "filter", qfilter)
2173

    
2174
    return self._SendRequest(HTTP_PUT,
2175
                             ("/%s/query/%s" %
2176
                              (GANETI_RAPI_VERSION, what)), None, body)
2177

    
2178
  def QueryFields(self, what, fields=None):
2179
    """Retrieves available fields for a resource.
2180

2181
    @type what: string
2182
    @param what: Resource name, one of L{constants.QR_VIA_RAPI}
2183
    @type fields: list of string
2184
    @param fields: Requested fields
2185

2186
    @rtype: string
2187
    @return: job id
2188

2189
    """
2190
    query = []
2191

    
2192
    if fields is not None:
2193
      _AppendIf(query, True, ("fields", ",".join(fields)))
2194

    
2195
    return self._SendRequest(HTTP_GET,
2196
                             ("/%s/query/%s/fields" %
2197
                              (GANETI_RAPI_VERSION, what)), query, None)