root / lib / rpc_defs.py @ 8a69b3a8
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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), |
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], 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), |
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], 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), |
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], 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"), |
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], 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"), |
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], 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), |
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], 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), |
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("size", None, None), |
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], None,
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"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), |
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], 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), |
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], 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), |
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], 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), |
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], 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), |
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], 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), |
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], 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), |
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], 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), |
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], 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), |
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("amount", None, None), |
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("dryrun", None, None), |
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], None, "Request a snapshot of the given block device"), |
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("blockdev_export", SINGLE, TMO_1DAY, [
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("cf_bdev", ED_OBJECT_DICT, None), |
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("dest_node", None, None), |
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("dest_path", None, None), |
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("cluster_name", None, None), |
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], None, "Export a given disk to another node"), |
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("blockdev_snapshot", SINGLE, TMO_NORMAL, [
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("cf_bdev", ED_OBJECT_DICT, None), |
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], None, "Export a given disk to another node"), |
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("blockdev_rename", SINGLE, TMO_NORMAL, [
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("devlist", ED_BLOCKDEV_RENAME, None), |
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], None, "Request rename of the given block devices"), |
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("blockdev_find", SINGLE, TMO_NORMAL, [
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("disk", ED_OBJECT_DICT, None), |
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], _BlockdevFindPostProc, |
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"Request identification of a given block device"),
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("blockdev_getmirrorstatus", SINGLE, TMO_NORMAL, [
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("disks", ED_OBJECT_DICT_LIST, None), |
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], _BlockdevGetMirrorStatusPostProc, |
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"Request status of a (mirroring) device"),
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("blockdev_getmirrorstatus_multi", MULTI, TMO_NORMAL, [
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("node_disks", ED_NODE_TO_DISK_DICT, None), |
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], _BlockdevGetMirrorStatusMultiPostProc, |
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"Request status of (mirroring) devices from multiple nodes"),
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] |
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|
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_OS_CALLS = [ |
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("os_diagnose", MULTI, TMO_FAST, [], None, |
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"Request a diagnose of OS definitions"),
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("os_validate", MULTI, TMO_FAST, [
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("required", None, None), |
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("name", None, None), |
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("checks", None, None), |
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("params", None, None), |
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], None, "Run a validation routine for a given OS"), |
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("os_get", SINGLE, TMO_FAST, [
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("name", None, None), |
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], _OsGetPostProc, "Returns an OS definition"),
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] |
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_NODE_CALLS = [ |
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("node_has_ip_address", SINGLE, TMO_FAST, [
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("address", None, "IP address"), |
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], None, "Checks if a node has the given IP address"), |
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("node_info", MULTI, TMO_URGENT, [
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("vg_names", None, |
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"Names of the volume groups to ask for disk space information"),
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("hv_names", None, |
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"Names of the hypervisors to ask for node information"),
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], None, "Return node information"), |
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("node_verify", MULTI, TMO_NORMAL, [
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("checkdict", None, None), |
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("cluster_name", None, None), |
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], None, "Request verification of given parameters"), |
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("node_volumes", MULTI, TMO_FAST, [], None, "Gets all volumes on node(s)"), |
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("node_demote_from_mc", SINGLE, TMO_FAST, [], None, |
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"Demote a node from the master candidate role"),
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("node_powercycle", SINGLE, TMO_NORMAL, [
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("hypervisor", None, "Hypervisor type"), |
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], None, "Tries to powercycle a node"), |
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] |
431 |
|
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_MISC_CALLS = [ |
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("lv_list", MULTI, TMO_URGENT, [
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("vg_name", None, None), |
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], None, "Gets the logical volumes present in a given volume group"), |
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("vg_list", MULTI, TMO_URGENT, [], None, "Gets the volume group list"), |
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("bridges_exist", SINGLE, TMO_URGENT, [
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("bridges_list", None, "Bridges which must be present on remote node"), |
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], None, "Checks if a node has all the bridges given"), |
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("etc_hosts_modify", SINGLE, TMO_NORMAL, [
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("mode", None, |
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"Mode to operate; currently L{constants.ETC_HOSTS_ADD} or"
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" L{constants.ETC_HOSTS_REMOVE}"),
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("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 |
} |