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#
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#
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# Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 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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"""RPC definitions for communication between master and node daemons.
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RPC definition fields:
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  - Name as string
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  - L{SINGLE} for single-node calls, L{MULTI} for multi-node
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  - Timeout (e.g. L{TMO_NORMAL}), or callback receiving all arguments in a
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    tuple to calculate timeout
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  - List of arguments as tuples
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    - Name as string
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    - Argument kind used for encoding/decoding
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    - Description for docstring (can be C{None})
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  - Return value wrapper (e.g. for deserializing into L{objects}-based objects)
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  - Short call description for docstring
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"""
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from ganeti import utils
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from ganeti import objects
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# Guidelines for choosing timeouts:
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# - call used during watcher: timeout of 1min, _TMO_URGENT
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# - trivial (but be sure it is trivial) (e.g. reading a file): 5min, _TMO_FAST
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# - other calls: 15 min, _TMO_NORMAL
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# - special calls (instance add, etc.): either _TMO_SLOW (1h) or huge timeouts
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TMO_URGENT = 60 # one minute
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TMO_FAST = 5 * 60 # five minutes
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TMO_NORMAL = 15 * 60 # 15 minutes
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TMO_SLOW = 3600 # one hour
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TMO_4HRS = 4 * 3600
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TMO_1DAY = 86400
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SINGLE = "single-node"
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MULTI = "multi-node"
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# Constants for encoding/decoding
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(ED_OBJECT_DICT,
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 ED_OBJECT_DICT_LIST,
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 ED_INST_DICT,
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 ED_INST_DICT_HVP_BEP,
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 ED_NODE_TO_DISK_DICT,
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 ED_INST_DICT_OSP,
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 ED_IMPEXP_IO,
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 ED_FILE_DETAILS,
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 ED_FINALIZE_EXPORT_DISKS,
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 ED_COMPRESS,
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 ED_BLOCKDEV_RENAME) = range(1, 12)
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def _Prepare(calls):
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  """Converts list of calls to dictionary.
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  """
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  return utils.SequenceToDict(calls)
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def _MigrationStatusPostProc(result):
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  """Post-processor for L{rpc.RpcRunner.call_instance_get_migration_status}.
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  """
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  if not result.fail_msg and result.payload is not None:
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    result.payload = objects.MigrationStatus.FromDict(result.payload)
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  return result
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def _BlockdevFindPostProc(result):
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  """Post-processor for L{rpc.RpcRunner.call_blockdev_find}.
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  """
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  if not result.fail_msg and result.payload is not None:
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    result.payload = objects.BlockDevStatus.FromDict(result.payload)
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  return result
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def _BlockdevGetMirrorStatusPostProc(result):
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  """Post-processor for L{rpc.RpcRunner.call_blockdev_getmirrorstatus}.
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  """
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  if not result.fail_msg:
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    result.payload = map(objects.BlockDevStatus.FromDict, result.payload)
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  return result
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def _BlockdevGetMirrorStatusMultiPostProc(result):
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  """Post-processor for L{rpc.RpcRunner.call_blockdev_getmirrorstatus_multi}.
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  """
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  if not result.fail_msg:
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    for idx, (success, status) in enumerate(result.payload):
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      if success:
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        result.payload[idx] = (success, objects.BlockDevStatus.FromDict(status))
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  return result
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def _OsGetPostProc(result):
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  """Post-processor for L{rpc.RpcRunner.call_os_get}.
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  """
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  if not result.fail_msg and isinstance(result.payload, dict):
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    result.payload = objects.OS.FromDict(result.payload)
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  return result
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def _ImpExpStatusPostProc(result):
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  """Post-processor for import/export status.
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  @rtype: Payload containing list of L{objects.ImportExportStatus} instances
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  @return: Returns a list of the state of each named import/export or None if
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           a status couldn't be retrieved
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  """
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  if not result.fail_msg:
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    decoded = []
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    for i in result.payload:
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      if i is None:
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        decoded.append(None)
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        continue
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      decoded.append(objects.ImportExportStatus.FromDict(i))
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    result.payload = decoded
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  return result
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def _TestDelayTimeout((duration, )):
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  """Calculate timeout for "test_delay" RPC.
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  """
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  return int(duration + 5)
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_FILE_STORAGE_CALLS = [
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  ("file_storage_dir_create", SINGLE, TMO_FAST, [
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    ("file_storage_dir", None, "File storage directory"),
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    ], None, "Create the given file storage directory"),
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  ("file_storage_dir_remove", SINGLE, TMO_FAST, [
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    ("file_storage_dir", None, "File storage directory"),
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    ], None, "Remove the given file storage directory"),
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  ("file_storage_dir_rename", SINGLE, TMO_FAST, [
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    ("old_file_storage_dir", None, "Old name"),
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    ("new_file_storage_dir", None, "New name"),
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    ], None, "Rename file storage directory"),
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  ]
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_STORAGE_CALLS = [
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  ("storage_list", MULTI, TMO_NORMAL, [
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    ("su_name", None, None),
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    ("su_args", None, None),
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    ("name", None, None),
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    ("fields", None, None),
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    ], None, "Get list of storage units"),
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  ("storage_modify", SINGLE, TMO_NORMAL, [
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    ("su_name", None, None),
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    ("su_args", None, None),
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    ("name", None, None),
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    ("changes", None, None),
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    ], None, "Modify a storage unit"),
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  ("storage_execute", SINGLE, TMO_NORMAL, [
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    ("su_name", None, None),
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    ("su_args", None, None),
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    ("name", None, None),
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    ("op", None, None),
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    ], None, "Executes an operation on a storage unit"),
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  ]
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_INSTANCE_CALLS = [
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  ("instance_info", SINGLE, TMO_URGENT, [
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    ("instance", None, "Instance name"),
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    ("hname", None, "Hypervisor type"),
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    ], None, "Returns information about a single instance"),
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  ("all_instances_info", MULTI, TMO_URGENT, [
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    ("hypervisor_list", None, "Hypervisors to query for instances"),
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    ], None, "Returns information about all instances on the given nodes"),
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  ("instance_list", MULTI, TMO_URGENT, [
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    ("hypervisor_list", None, "Hypervisors to query for instances"),
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    ], None, "Returns the list of running instances on the given nodes"),
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  ("instance_reboot", SINGLE, TMO_NORMAL, [
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    ("inst", ED_INST_DICT, "Instance object"),
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    ("reboot_type", None, None),
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    ("shutdown_timeout", None, None),
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    ], None, "Returns the list of running instances on the given nodes"),
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  ("instance_shutdown", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("timeout", None, None),
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    ], None, "Stops an instance"),
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  ("instance_run_rename", SINGLE, TMO_SLOW, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("old_name", None, None),
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    ("debug", None, None),
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    ], None, "Run the OS rename script for an instance"),
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  ("instance_migratable", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ], None, "Checks whether the given instance can be migrated"),
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  ("migration_info", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ], None,
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    "Gather the information necessary to prepare an instance migration"),
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  ("accept_instance", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("info", None, "Result for the call_migration_info call"),
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    ("target", None, "Target hostname (usually an IP address)"),
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    ], None, "Prepare a node to accept an instance"),
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  ("instance_finalize_migration_dst", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("info", None, "Result for the call_migration_info call"),
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    ("success", None, "Whether the migration was a success or failure"),
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    ], None, "Finalize any target-node migration specific operation"),
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  ("instance_migrate", SINGLE, TMO_SLOW, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("target", None, "Target node name"),
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    ("live", None, "Whether the migration should be done live or not"),
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    ], None, "Migrate an instance"),
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  ("instance_finalize_migration_src", SINGLE, TMO_SLOW, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ("success", None, "Whether the migration succeeded or not"),
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    ("live", None, "Whether the user requested a live migration or not"),
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    ], None, "Finalize the instance migration on the source node"),
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  ("instance_get_migration_status", SINGLE, TMO_SLOW, [
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    ("instance", ED_INST_DICT, "Instance object"),
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    ], _MigrationStatusPostProc, "Report migration status"),
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  ("instance_start", SINGLE, TMO_NORMAL, [
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    ("instance_hvp_bep", ED_INST_DICT_HVP_BEP, None),
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    ("startup_paused", None, None),
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    ], None, "Starts an instance"),
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  ("instance_os_add", SINGLE, TMO_1DAY, [
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    ("instance_osp", ED_INST_DICT_OSP, None),
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    ("reinstall", None, None),
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    ("debug", None, None),
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    ], None, "Starts an instance"),
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  ]
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_IMPEXP_CALLS = [
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  ("import_start", SINGLE, TMO_NORMAL, [
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    ("opts", ED_OBJECT_DICT, None),
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    ("instance", ED_INST_DICT, None),
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    ("component", None, None),
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    ("dest", ED_IMPEXP_IO, "Import destination"),
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    ], None, "Starts an import daemon"),
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  ("export_start", SINGLE, TMO_NORMAL, [
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    ("opts", ED_OBJECT_DICT, None),
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    ("host", None, None),
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    ("port", None, None),
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    ("instance", ED_INST_DICT, None),
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    ("component", None, None),
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    ("source", ED_IMPEXP_IO, "Export source"),
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    ], None, "Starts an export daemon"),
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  ("impexp_status", SINGLE, TMO_FAST, [
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    ("names", None, "Import/export names"),
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    ], _ImpExpStatusPostProc, "Gets the status of an import or export"),
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  ("impexp_abort", SINGLE, TMO_NORMAL, [
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    ("name", None, "Import/export name"),
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    ], None, "Aborts an import or export"),
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  ("impexp_cleanup", SINGLE, TMO_NORMAL, [
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    ("name", None, "Import/export name"),
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    ], None, "Cleans up after an import or export"),
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  ("export_info", SINGLE, TMO_FAST, [
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    ("path", None, None),
283
    ], None, "Queries the export information in a given path"),
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  ("finalize_export", SINGLE, TMO_NORMAL, [
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    ("instance", ED_INST_DICT, None),
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    ("snap_disks", ED_FINALIZE_EXPORT_DISKS, None),
287
    ], None, "Request the completion of an export operation"),
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  ("export_list", MULTI, TMO_FAST, [], None, "Gets the stored exports list"),
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  ("export_remove", SINGLE, TMO_FAST, [
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    ("export", None, None),
291
    ], None, "Requests removal of a given export"),
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  ]
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_X509_CALLS = [
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  ("x509_cert_create", SINGLE, TMO_NORMAL, [
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    ("validity", None, "Validity in seconds"),
297
    ], None, "Creates a new X509 certificate for SSL/TLS"),
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  ("x509_cert_remove", SINGLE, TMO_NORMAL, [
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    ("name", None, "Certificate name"),
300
    ], None, "Removes a X509 certificate"),
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  ]
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_BLOCKDEV_CALLS = [
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  ("bdev_sizes", MULTI, TMO_URGENT, [
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    ("devices", None, None),
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    ], None, "Gets the sizes of requested block devices present on a node"),
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  ("blockdev_create", SINGLE, TMO_NORMAL, [
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    ("bdev", ED_OBJECT_DICT, None),
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    ("size", None, None),
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    ("owner", None, None),
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    ("on_primary", None, None),
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    ("info", None, None),
313
    ], None, "Request creation of a given block device"),
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  ("blockdev_wipe", SINGLE, TMO_SLOW, [
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    ("bdev", ED_OBJECT_DICT, None),
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    ("offset", None, None),
317
    ("size", None, None),
318
    ], None,
319
    "Request wipe at given offset with given size of a block device"),
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  ("blockdev_remove", SINGLE, TMO_NORMAL, [
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    ("bdev", ED_OBJECT_DICT, None),
322
    ], None, "Request removal of a given block device"),
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  ("blockdev_pause_resume_sync", SINGLE, TMO_NORMAL, [
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    ("disks", ED_OBJECT_DICT_LIST, None),
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    ("pause", None, None),
326
    ], None, "Request a pause/resume of given block device"),
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  ("blockdev_assemble", SINGLE, TMO_NORMAL, [
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    ("disk", ED_OBJECT_DICT, None),
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    ("owner", None, None),
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    ("on_primary", None, None),
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    ("idx", None, None),
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    ], None, "Request assembling of a given block device"),
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  ("blockdev_shutdown", SINGLE, TMO_NORMAL, [
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    ("disk", ED_OBJECT_DICT, None),
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    ], None, "Request shutdown of a given block device"),
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  ("blockdev_addchildren", SINGLE, TMO_NORMAL, [
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    ("bdev", ED_OBJECT_DICT, None),
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    ("ndevs", ED_OBJECT_DICT_LIST, None),
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    ], None, "Request adding a list of children to a (mirroring) device"),
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  ("blockdev_removechildren", SINGLE, TMO_NORMAL, [
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    ("bdev", ED_OBJECT_DICT, None),
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    ("ndevs", ED_OBJECT_DICT_LIST, None),
343
    ], None, "Request removing a list of children from a (mirroring) device"),
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  ("blockdev_close", SINGLE, TMO_NORMAL, [
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    ("instance_name", None, None),
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    ("disks", ED_OBJECT_DICT_LIST, None),
347
    ], None, "Closes the given block devices"),
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  ("blockdev_getsize", SINGLE, TMO_NORMAL, [
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    ("disks", ED_OBJECT_DICT_LIST, None),
350
    ], None, "Returns the size of the given disks"),
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  ("drbd_disconnect_net", MULTI, TMO_NORMAL, [
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    ("nodes_ip", None, None),
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    ("disks", ED_OBJECT_DICT_LIST, None),
354
    ], None, "Disconnects the network of the given drbd devices"),
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  ("drbd_attach_net", MULTI, TMO_NORMAL, [
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    ("nodes_ip", None, None),
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    ("disks", ED_OBJECT_DICT_LIST, None),
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    ("instance_name", None, None),
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    ("multimaster", None, None),
360
    ], None, "Connects the given DRBD devices"),
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  ("drbd_wait_sync", MULTI, TMO_SLOW, [
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    ("nodes_ip", None, None),
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    ("disks", ED_OBJECT_DICT_LIST, None),
364
    ], None, "Waits for the synchronization of drbd devices is complete"),
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  ("blockdev_grow", SINGLE, TMO_NORMAL, [
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    ("cf_bdev", ED_OBJECT_DICT, None),
367
    ("amount", None, None),
368
    ("dryrun", None, None),
369
    ], None, "Request a snapshot of the given block device"),
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  ("blockdev_export", SINGLE, TMO_1DAY, [
371
    ("cf_bdev", ED_OBJECT_DICT, None),
372
    ("dest_node", None, None),
373
    ("dest_path", None, None),
374
    ("cluster_name", None, None),
375
    ], None, "Export a given disk to another node"),
376
  ("blockdev_snapshot", SINGLE, TMO_NORMAL, [
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    ("cf_bdev", ED_OBJECT_DICT, None),
378
    ], None, "Export a given disk to another node"),
379
  ("blockdev_rename", SINGLE, TMO_NORMAL, [
380
    ("devlist", ED_BLOCKDEV_RENAME, None),
381
    ], None, "Request rename of the given block devices"),
382
  ("blockdev_find", SINGLE, TMO_NORMAL, [
383
    ("disk", ED_OBJECT_DICT, None),
384
    ], _BlockdevFindPostProc,
385
    "Request identification of a given block device"),
386
  ("blockdev_getmirrorstatus", SINGLE, TMO_NORMAL, [
387
    ("disks", ED_OBJECT_DICT_LIST, None),
388
    ], _BlockdevGetMirrorStatusPostProc,
389
    "Request status of a (mirroring) device"),
390
  ("blockdev_getmirrorstatus_multi", MULTI, TMO_NORMAL, [
391
    ("node_disks", ED_NODE_TO_DISK_DICT, None),
392
    ], _BlockdevGetMirrorStatusMultiPostProc,
393
    "Request status of (mirroring) devices from multiple nodes"),
394
  ]
395

    
396
_OS_CALLS = [
397
  ("os_diagnose", MULTI, TMO_FAST, [], None,
398
   "Request a diagnose of OS definitions"),
399
  ("os_validate", MULTI, TMO_FAST, [
400
    ("required", None, None),
401
    ("name", None, None),
402
    ("checks", None, None),
403
    ("params", None, None),
404
    ], None, "Run a validation routine for a given OS"),
405
  ("os_get", SINGLE, TMO_FAST, [
406
    ("name", None, None),
407
    ], _OsGetPostProc, "Returns an OS definition"),
408
  ]
409

    
410
_NODE_CALLS = [
411
  ("node_has_ip_address", SINGLE, TMO_FAST, [
412
    ("address", None, "IP address"),
413
    ], None, "Checks if a node has the given IP address"),
414
  ("node_info", MULTI, TMO_URGENT, [
415
    ("vg_names", None,
416
     "Names of the volume groups to ask for disk space information"),
417
    ("hv_names", None,
418
     "Names of the hypervisors to ask for node information"),
419
    ], None, "Return node information"),
420
  ("node_verify", MULTI, TMO_NORMAL, [
421
    ("checkdict", None, None),
422
    ("cluster_name", None, None),
423
    ], None, "Request verification of given parameters"),
424
  ("node_volumes", MULTI, TMO_FAST, [], None, "Gets all volumes on node(s)"),
425
  ("node_demote_from_mc", SINGLE, TMO_FAST, [], None,
426
   "Demote a node from the master candidate role"),
427
  ("node_powercycle", SINGLE, TMO_NORMAL, [
428
    ("hypervisor", None, "Hypervisor type"),
429
    ], None, "Tries to powercycle a node"),
430
  ]
431

    
432
_MISC_CALLS = [
433
  ("lv_list", MULTI, TMO_URGENT, [
434
    ("vg_name", None, None),
435
    ], None, "Gets the logical volumes present in a given volume group"),
436
  ("vg_list", MULTI, TMO_URGENT, [], None, "Gets the volume group list"),
437
  ("bridges_exist", SINGLE, TMO_URGENT, [
438
    ("bridges_list", None, "Bridges which must be present on remote node"),
439
    ], None, "Checks if a node has all the bridges given"),
440
  ("etc_hosts_modify", SINGLE, TMO_NORMAL, [
441
    ("mode", None,
442
     "Mode to operate; currently L{constants.ETC_HOSTS_ADD} or"
443
     " L{constants.ETC_HOSTS_REMOVE}"),
444
    ("name", None, "Hostname to be modified"),
445
    ("ip", None, "IP address (L{constants.ETC_HOSTS_ADD} only)"),
446
    ], None, "Modify hosts file with name"),
447
  ("drbd_helper", MULTI, TMO_URGENT, [], None, "Gets DRBD helper"),
448
  ("run_oob", SINGLE, TMO_NORMAL, [
449
    ("oob_program", None, None),
450
    ("command", None, None),
451
    ("remote_node", None, None),
452
    ("timeout", None, None),
453
    ], None, "Runs out-of-band command"),
454
  ("hooks_runner", MULTI, TMO_NORMAL, [
455
    ("hpath", None, None),
456
    ("phase", None, None),
457
    ("env", None, None),
458
    ], None, "Call the hooks runner"),
459
  ("iallocator_runner", SINGLE, TMO_NORMAL, [
460
    ("name", None, "Iallocator name"),
461
    ("idata", None, "JSON-encoded input string"),
462
    ], None, "Call an iallocator on a remote node"),
463
  ("test_delay", MULTI, _TestDelayTimeout, [
464
    ("duration", None, None),
465
    ], None, "Sleep for a fixed time on given node(s)"),
466
  ("hypervisor_validate_params", MULTI, TMO_NORMAL, [
467
    ("hvname", None, "Hypervisor name"),
468
    ("hvfull", None, "Parameters to be validated"),
469
    ], None, "Validate hypervisor params"),
470
  ]
471

    
472
CALLS = {
473
  "RpcClientDefault": \
474
    _Prepare(_IMPEXP_CALLS + _X509_CALLS + _OS_CALLS + _NODE_CALLS +
475
             _FILE_STORAGE_CALLS + _MISC_CALLS + _INSTANCE_CALLS +
476
             _BLOCKDEV_CALLS + _STORAGE_CALLS),
477
  "RpcClientJobQueue": _Prepare([
478
    ("jobqueue_update", MULTI, TMO_URGENT, [
479
      ("file_name", None, None),
480
      ("content", ED_COMPRESS, None),
481
      ], None, "Update job queue file"),
482
    ("jobqueue_purge", SINGLE, TMO_NORMAL, [], None, "Purge job queue"),
483
    ("jobqueue_rename", MULTI, TMO_URGENT, [
484
      ("rename", None, None),
485
      ], None, "Rename job queue file"),
486
    ]),
487
  "RpcClientBootstrap": _Prepare([
488
    ("node_start_master_daemons", SINGLE, TMO_FAST, [
489
      ("no_voting", None, None),
490
      ], None, "Starts master daemons on a node"),
491
    ("node_activate_master_ip", SINGLE, TMO_FAST, [
492
      ("master_params", ED_OBJECT_DICT, "Network parameters of the master"),
493
      ("use_external_mip_script", None,
494
       "Whether to use the user-provided master IP address setup script"),
495
      ], None,
496
      "Activates master IP on a node"),
497
    ("node_stop_master", SINGLE, TMO_FAST, [], None,
498
     "Deactivates master IP and stops master daemons on a node"),
499
    ("node_deactivate_master_ip", SINGLE, TMO_FAST, [
500
      ("master_params", ED_OBJECT_DICT, "Network parameters of the master"),
501
      ("use_external_mip_script", None,
502
       "Whether to use the user-provided master IP address setup script"),
503
      ], None,
504
     "Deactivates master IP on a node"),
505
    ("node_change_master_netmask", SINGLE, TMO_FAST, [
506
      ("old_netmask", None, "The old value of the netmask"),
507
      ("netmask", None, "The new value of the netmask"),
508
      ("master_ip", None, "The master IP"),
509
      ("master_netdev", None, "The master network device"),
510
      ], None, "Change master IP netmask"),
511
    ("node_leave_cluster", SINGLE, TMO_NORMAL, [
512
      ("modify_ssh_setup", None, None),
513
      ], None, "Requests a node to clean the cluster information it has"),
514
    ("master_info", MULTI, TMO_URGENT, [], None, "Query master info"),
515
    ("version", MULTI, TMO_URGENT, [], None, "Query node version"),
516
    ]),
517
  "RpcClientConfig": _Prepare([
518
    ("upload_file", MULTI, TMO_NORMAL, [
519
      ("file_name", ED_FILE_DETAILS, None),
520
      ], None, "Upload a file"),
521
    ("write_ssconf_files", MULTI, TMO_NORMAL, [
522
      ("values", None, None),
523
      ], None, "Write ssconf files"),
524
    ]),
525
  }