opcodes.py 12 KB
Newer Older
Iustin Pop's avatar
Iustin Pop committed
1
#
Iustin Pop's avatar
Iustin Pop committed
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
#

# Copyright (C) 2006, 2007 Google Inc.
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
# 02110-1301, USA.


"""OpCodes module

This module implements the data structures which define the cluster
operations - the so-called opcodes.


This module implements the logic for doing operations in the cluster. There
are two kinds of classes defined:
  - opcodes, which are small classes only holding data for the task at hand
  - logical units, which know how to deal with their specific opcode only

"""

# this are practically structures, so disable the message about too
# few public methods:
# pylint: disable-msg=R0903

39
40
41
42
43
44
45
46

class BaseJO(object):
  """A simple serializable object.

  This object serves as a parent class for both OpCode and Job since
  they are serialized in the same way.

  """
Iustin Pop's avatar
Iustin Pop committed
47
48
49
50
51
  __slots__ = []

  def __init__(self, **kwargs):
    for key in kwargs:
      if key not in self.__slots__:
52
        raise TypeError("Object %s doesn't support the parameter '%s'" %
53
                        (self.__class__.__name__, key))
Iustin Pop's avatar
Iustin Pop committed
54
55
      setattr(self, key, kwargs[key])

56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
  def __getstate__(self):
    state = {}
    for name in self.__slots__:
      if hasattr(self, name):
        state[name] = getattr(self, name)
    return state

  def __setstate__(self, state):
    if not isinstance(state, dict):
      raise ValueError("Invalid data to __setstate__: expected dict, got %s" %
                       type(state))

    for name in self.__slots__:
      if name not in state:
        delattr(self, name)

    for name in state:
      setattr(self, name, state[name])


class Job(BaseJO):
77
78
79
80
81
82
83
84
85
86
87
88
  """Job definition structure

  The Job definitions has two sets of parameters:
    - the parameters of the job itself (all filled by server):
      - job_id,
      - status: pending, running, successfull, failed, aborted
    - opcode parameters:
      - op_list, list of opcodes, clients creates this
      - op_status, status for each opcode, server fills in
      - op_result, result for each opcode, server fills in

  """
89
90
  STATUS_PENDING = 1
  STATUS_RUNNING = 2
91
92
93
94
95
96
97
98
99
100
101
  STATUS_SUCCESS = 3
  STATUS_FAIL = 4
  STATUS_ABORT = 5

  __slots__ = [
    "job_id",
    "status",
    "op_list",
    "op_status",
    "op_result",
    ]
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117

  def __getstate__(self):
    """Specialized getstate for jobs

    """
    data = BaseJO.__getstate__(self)
    if "op_list" in data:
      data["op_list"] = [op.__getstate__() for op in data["op_list"]]
    return data

  def __setstate__(self, state):
    """Specialized setstate for jobs

    """
    BaseJO.__setstate__(self, state)
    if "op_list" in state:
118
      self.op_list = [OpCode.LoadOpCode(op) for op in state["op_list"]]
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134


class OpCode(BaseJO):
  """Abstract OpCode"""
  OP_ID = "OP_ABSTRACT"
  __slots__ = []

  def __getstate__(self):
    """Specialized getstate for opcodes.

    """
    data = BaseJO.__getstate__(self)
    data["OP_ID"] = self.OP_ID
    return data

  @classmethod
135
  def LoadOpCode(cls, data):
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
    """Generic load opcode method.

    """
    if not isinstance(data, dict):
      raise ValueError("Invalid data to LoadOpCode (%s)" % type(data))
    if "OP_ID" not in data:
      raise ValueError("Invalid data to LoadOpcode, missing OP_ID")
    op_id = data["OP_ID"]
    op_class = None
    for item in globals().values():
      if (isinstance(item, type) and
          issubclass(item, cls) and
          hasattr(item, "OP_ID") and
          getattr(item, "OP_ID") == op_id):
        op_class = item
        break
    if op_class is None:
      raise ValueError("Invalid data to LoadOpCode: OP_ID %s unsupported" %
                       op_id)
    op = op_class()
    new_data = data.copy()
    del new_data["OP_ID"]
    op.__setstate__(new_data)
    return op

Iustin Pop's avatar
Iustin Pop committed
161
162
163
164
165
166
167
168

class OpDestroyCluster(OpCode):
  """Destroy the cluster."""
  OP_ID = "OP_CLUSTER_DESTROY"
  __slots__ = []


class OpQueryClusterInfo(OpCode):
Iustin Pop's avatar
Iustin Pop committed
169
  """Query cluster information."""
Iustin Pop's avatar
Iustin Pop committed
170
171
172
173
174
  OP_ID = "OP_CLUSTER_QUERY"
  __slots__ = []


class OpClusterCopyFile(OpCode):
Iustin Pop's avatar
Iustin Pop committed
175
  """Copy a file to multiple nodes."""
Iustin Pop's avatar
Iustin Pop committed
176
177
178
179
180
  OP_ID = "OP_CLUSTER_COPYFILE"
  __slots__ = ["nodes", "filename"]


class OpRunClusterCommand(OpCode):
Iustin Pop's avatar
Iustin Pop committed
181
  """Run a command on multiple nodes."""
Iustin Pop's avatar
Iustin Pop committed
182
183
184
185
186
  OP_ID = "OP_CLUSTER_RUNCOMMAND"
  __slots__ = ["nodes", "command"]


class OpVerifyCluster(OpCode):
Iustin Pop's avatar
Iustin Pop committed
187
  """Verify the cluster state."""
Iustin Pop's avatar
Iustin Pop committed
188
  OP_ID = "OP_CLUSTER_VERIFY"
189
  __slots__ = ["skip_checks"]
Iustin Pop's avatar
Iustin Pop committed
190
191


Iustin Pop's avatar
Iustin Pop committed
192
193
194
195
196
197
198
class OpVerifyDisks(OpCode):
  """Verify the cluster disks.

  Parameters: none

  Result: two lists:
    - list of node names with bad data returned (unreachable, etc.)
199
    - dist of node names with broken volume groups (values: error msg)
Iustin Pop's avatar
Iustin Pop committed
200
    - list of instances with degraded disks (that should be activated)
201
202
    - dict of instances with missing logical volumes (values: (node, vol)
      pairs with details about the missing volumes)
Iustin Pop's avatar
Iustin Pop committed
203

204
205
206
207
  In normal operation, all lists should be empty. A non-empty instance
  list (3rd element of the result) is still ok (errors were fixed) but
  non-empty node list means some node is down, and probably there are
  unfixable drbd errors.
Iustin Pop's avatar
Iustin Pop committed
208
209
210
211
212
213
214
215
216

  Note that only instances that are drbd-based are taken into
  consideration. This might need to be revisited in the future.

  """
  OP_ID = "OP_CLUSTER_VERIFY_DISKS"
  __slots__ = []


Iustin Pop's avatar
Iustin Pop committed
217
class OpMasterFailover(OpCode):
Iustin Pop's avatar
Iustin Pop committed
218
  """Do a master failover."""
Iustin Pop's avatar
Iustin Pop committed
219
220
221
222
223
  OP_ID = "OP_CLUSTER_MASTERFAILOVER"
  __slots__ = []


class OpDumpClusterConfig(OpCode):
Iustin Pop's avatar
Iustin Pop committed
224
  """Dump the cluster configuration."""
Iustin Pop's avatar
Iustin Pop committed
225
226
227
228
  OP_ID = "OP_CLUSTER_DUMPCONFIG"
  __slots__ = []


229
230
231
232
233
234
class OpRenameCluster(OpCode):
  """Rename the cluster."""
  OP_ID = "OP_CLUSTER_RENAME"
  __slots__ = ["name"]


235
236
237
238
239
240
class OpSetClusterParams(OpCode):
  """Change the parameters of the cluster."""
  OP_ID = "OP_CLUSTER_SET_PARAMS"
  __slots__ = ["vg_name"]


241
242
# node opcodes

Iustin Pop's avatar
Iustin Pop committed
243
244
245
246
247
248
249
250
251
class OpRemoveNode(OpCode):
  """Remove a node."""
  OP_ID = "OP_NODE_REMOVE"
  __slots__ = ["node_name"]


class OpAddNode(OpCode):
  """Add a node."""
  OP_ID = "OP_NODE_ADD"
252
  __slots__ = ["node_name", "primary_ip", "secondary_ip", "readd"]
Iustin Pop's avatar
Iustin Pop committed
253
254
255
256
257


class OpQueryNodes(OpCode):
  """Compute the list of nodes."""
  OP_ID = "OP_NODE_QUERY"
258
  __slots__ = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
259
260


261
262
263
264
265
266
class OpQueryNodeVolumes(OpCode):
  """Get list of volumes on node."""
  OP_ID = "OP_NODE_QUERYVOLS"
  __slots__ = ["nodes", "output_fields"]


Iustin Pop's avatar
Iustin Pop committed
267
268
269
# instance opcodes

class OpCreateInstance(OpCode):
Iustin Pop's avatar
Iustin Pop committed
270
  """Create an instance."""
Iustin Pop's avatar
Iustin Pop committed
271
  OP_ID = "OP_INSTANCE_CREATE"
272
273
274
275
276
  __slots__ = [
    "instance_name", "mem_size", "disk_size", "os_type", "pnode",
    "disk_template", "snode", "swap_size", "mode",
    "vcpus", "ip", "bridge", "src_node", "src_path", "start",
    "wait_for_sync", "ip_check", "mac",
277
278
    "kernel_path", "initrd_path", "hvm_boot_order", "hvm_acpi",
    "hvm_pae", "hvm_cdrom_image_path", "vnc_bind_address",
279
    "file_storage_dir", "file_driver",
280
    "iallocator",
281
    ]
Iustin Pop's avatar
Iustin Pop committed
282
283


284
class OpReinstallInstance(OpCode):
Iustin Pop's avatar
Iustin Pop committed
285
  """Reinstall an instance's OS."""
286
  OP_ID = "OP_INSTANCE_REINSTALL"
287
  __slots__ = ["instance_name", "os_type"]
288
289


Iustin Pop's avatar
Iustin Pop committed
290
291
292
class OpRemoveInstance(OpCode):
  """Remove an instance."""
  OP_ID = "OP_INSTANCE_REMOVE"
Iustin Pop's avatar
Iustin Pop committed
293
  __slots__ = ["instance_name", "ignore_failures"]
Iustin Pop's avatar
Iustin Pop committed
294
295


296
297
298
299
300
301
class OpRenameInstance(OpCode):
  """Rename an instance."""
  OP_ID = "OP_INSTANCE_RENAME"
  __slots__ = ["instance_name", "ignore_ip", "new_name"]


Iustin Pop's avatar
Iustin Pop committed
302
class OpStartupInstance(OpCode):
Iustin Pop's avatar
Iustin Pop committed
303
  """Startup an instance."""
Iustin Pop's avatar
Iustin Pop committed
304
305
306
307
308
  OP_ID = "OP_INSTANCE_STARTUP"
  __slots__ = ["instance_name", "force", "extra_args"]


class OpShutdownInstance(OpCode):
Iustin Pop's avatar
Iustin Pop committed
309
  """Shutdown an instance."""
Iustin Pop's avatar
Iustin Pop committed
310
311
312
313
  OP_ID = "OP_INSTANCE_SHUTDOWN"
  __slots__ = ["instance_name"]


314
315
class OpRebootInstance(OpCode):
  """Reboot an instance."""
Iustin Pop's avatar
Iustin Pop committed
316
  OP_ID = "OP_INSTANCE_REBOOT"
317
318
319
320
  __slots__ = ["instance_name", "reboot_type", "extra_args",
               "ignore_secondaries" ]


Iustin Pop's avatar
Iustin Pop committed
321
class OpReplaceDisks(OpCode):
Iustin Pop's avatar
Iustin Pop committed
322
  """Replace the disks of an instance."""
Iustin Pop's avatar
Iustin Pop committed
323
  OP_ID = "OP_INSTANCE_REPLACE_DISKS"
324
  __slots__ = ["instance_name", "remote_node", "mode", "disks", "iallocator"]
Iustin Pop's avatar
Iustin Pop committed
325
326
327
328
329
330
331
332
333


class OpFailoverInstance(OpCode):
  """Failover an instance."""
  OP_ID = "OP_INSTANCE_FAILOVER"
  __slots__ = ["instance_name", "ignore_consistency"]


class OpConnectConsole(OpCode):
Iustin Pop's avatar
Iustin Pop committed
334
  """Connect to an instance's console."""
Iustin Pop's avatar
Iustin Pop committed
335
336
337
338
339
  OP_ID = "OP_INSTANCE_CONSOLE"
  __slots__ = ["instance_name"]


class OpActivateInstanceDisks(OpCode):
Iustin Pop's avatar
Iustin Pop committed
340
  """Activate an instance's disks."""
Iustin Pop's avatar
Iustin Pop committed
341
342
343
344
345
  OP_ID = "OP_INSTANCE_ACTIVATE_DISKS"
  __slots__ = ["instance_name"]


class OpDeactivateInstanceDisks(OpCode):
Iustin Pop's avatar
Iustin Pop committed
346
  """Deactivate an instance's disks."""
Iustin Pop's avatar
Iustin Pop committed
347
348
349
350
351
352
353
  OP_ID = "OP_INSTANCE_DEACTIVATE_DISKS"
  __slots__ = ["instance_name"]


class OpQueryInstances(OpCode):
  """Compute the list of instances."""
  OP_ID = "OP_INSTANCE_QUERY"
354
  __slots__ = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
355
356
357
358
359
360
361
362


class OpQueryInstanceData(OpCode):
  """Compute the run-time status of instances."""
  OP_ID = "OP_INSTANCE_QUERY_DATA"
  __slots__ = ["instances"]


363
class OpSetInstanceParams(OpCode):
Iustin Pop's avatar
Iustin Pop committed
364
  """Change the parameters of an instance."""
365
  OP_ID = "OP_INSTANCE_SET_PARAMS"
366
367
  __slots__ = [
    "instance_name", "mem", "vcpus", "ip", "bridge", "mac",
368
369
    "kernel_path", "initrd_path", "hvm_boot_order", "hvm_acpi",
    "hvm_pae", "hvm_cdrom_image_path", "vnc_bind_address"
370
    ]
Iustin Pop's avatar
Iustin Pop committed
371
372
373
374
375
376


# OS opcodes
class OpDiagnoseOS(OpCode):
  """Compute the list of guest operating systems."""
  OP_ID = "OP_OS_DIAGNOSE"
377
  __slots__ = ["output_fields", "names"]
Iustin Pop's avatar
Iustin Pop committed
378

379

Iustin Pop's avatar
Iustin Pop committed
380
381
382
383
384
385
# Exports opcodes
class OpQueryExports(OpCode):
  """Compute the list of exported images."""
  OP_ID = "OP_BACKUP_QUERY"
  __slots__ = ["nodes"]

386

Iustin Pop's avatar
Iustin Pop committed
387
388
389
390
class OpExportInstance(OpCode):
  """Export an instance."""
  OP_ID = "OP_BACKUP_EXPORT"
  __slots__ = ["instance_name", "target_node", "shutdown"]
391

392
393
394
395
class OpRemoveExport(OpCode):
  """Remove an instance's export."""
  OP_ID = "OP_BACKUP_REMOVE"
  __slots__ = ["instance_name"]
396
397
398
399
400
401
402
403

# Tags opcodes
class OpGetTags(OpCode):
  """Returns the tags of the given object."""
  OP_ID = "OP_TAGS_GET"
  __slots__ = ["kind", "name"]


Iustin Pop's avatar
Iustin Pop committed
404
405
406
407
408
409
class OpSearchTags(OpCode):
  """Searches the tags in the cluster for a given pattern."""
  OP_ID = "OP_TAGS_SEARCH"
  __slots__ = ["pattern"]


410
411
class OpAddTags(OpCode):
  """Add a list of tags on a given object."""
412
  OP_ID = "OP_TAGS_SET"
413
  __slots__ = ["kind", "name", "tags"]
414
415


416
417
class OpDelTags(OpCode):
  """Remove a list of tags from a given object."""
418
  OP_ID = "OP_TAGS_DEL"
419
  __slots__ = ["kind", "name", "tags"]
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445


# Test opcodes
class OpTestDelay(OpCode):
  """Sleeps for a configured amount of time.

  This is used just for debugging and testing.

  Parameters:
    - duration: the time to sleep
    - on_master: if true, sleep on the master
    - on_nodes: list of nodes in which to sleep

  If the on_master parameter is true, it will execute a sleep on the
  master (before any node sleep).

  If the on_nodes list is not empty, it will sleep on those nodes
  (after the sleep on the master, if that is enabled).

  As an additional feature, the case of duration < 0 will be reported
  as an execution error, so this opcode can be used as a failure
  generator. The case of duration == 0 will not be treated specially.

  """
  OP_ID = "OP_TEST_DELAY"
  __slots__ = ["duration", "on_master", "on_nodes"]
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464


class OpTestAllocator(OpCode):
  """Allocator framework testing.

  This opcode has two modes:
    - gather and return allocator input for a given mode (allocate new
      or replace secondary) and a given instance definition (direction
      'in')
    - run a selected allocator for a given operation (as above) and
      return the allocator output (direction 'out')

  """
  OP_ID = "OP_TEST_ALLOCATOR"
  __slots__ = [
    "direction", "mode", "allocator", "name",
    "mem_size", "disks", "disk_template",
    "os", "tags", "nics", "vcpus",
    ]