Package ganeti :: Module cmdlib :: Class IAllocator

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Class IAllocator

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IAllocator framework.

An IAllocator instance has three sets of attributes:

cfg that is needed to query the cluster
input data (all members of the _KEYS class attribute are required)
four buffer attributes (in|out_data|text), that represent the input (to the external script) in text and data structure format, and the output from it, again in two formats
the result variables from the script (success, info, nodes) for easy usage

Instance Methods

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__init__(self, cfg, rpc_runner, mode, **kwargs)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature

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_ComputeClusterData(self)
Compute the generic allocator input data.

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_AddNewInstance(self)
Add new instance data to allocator structure.

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_AddRelocateInstance(self)
Add relocate instance data to allocator structure.

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_AddNodeEvacuate(self)
Get data for node-evacuate requests.

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_AddChangeGroup(self)
Get data for node-evacuate requests.

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_BuildInputData(self, fn, keydata)
Build input data structures.

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Run(self, name, validate=True, call_fn=None)
Run an instance allocator and return the results.

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_ValidateResult(self)
Process the allocator results.

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Inherited from object: __delattr__, __format__, __getattribute__, __hash__, __new__, __reduce__, __reduce_ex__, __repr__, __setattr__, __sizeof__, __str__, __subclasshook__

Static Methods

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_ComputeNodeGroupData(cfg)
Compute node groups data.

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dict

_ComputeBasicNodeData(cfg, node_cfg)
Compute global node data.

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_ComputeDynamicNodeData(node_cfg, node_data, node_iinfo, i_list, node_results)
Compute global node data.

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_ComputeInstanceData(cluster_info, i_list)
Compute global instance data.

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_NodesToGroups(node2group, groups, nodes)
Returns a list of unique group names for a list of nodes.

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Class Variables

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_STRING_LIST = ht.TListOf(ht.TString)

_JOB_LIST = ht.TListOf(ht.TListOf(ht.TStrictDict(True, False, ...

_NEVAC_MOVED = ht.TListOf(ht.TAnd(ht.TIsLength(3), ht.TItems([...

_NEVAC_FAILED = ht.TListOf(ht.TAnd(ht.TIsLength(2), ht.TItems(...

_NEVAC_RESULT = ht.TAnd(ht.TIsLength(3), ht.TItems([_NEVAC_MOV...

_MODE_DATA = {constants.IALLOCATOR_MODE_ALLOC:(_AddNewInstance...

Properties

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Inherited from object: __class__

Method Details

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init(self, cfg, rpc_runner, mode, **kwargs)
(Constructor)

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x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Overrides: object.__init__: (inherited documentation)

_ComputeClusterData(self)

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Compute the generic allocator input data.

This is the data that is independent of the actual operation.

_ComputeBasicNodeData(cfg, node_cfg)
Static Method

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Compute global node data.

Returns: dict: a dict of name: (node dict, node config)

_ComputeDynamicNodeData(node_cfg, node_data, node_iinfo, i_list, node_results)
Static Method

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Compute global node data.

Parameters:

node_results - the basic node structures as filled from the config

_AddNewInstance(self)

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Add new instance data to allocator structure.

This in combination with _AllocatorGetClusterData will create the correct structure needed as input for the allocator.

The checks for the completeness of the opcode must have already been done.

_AddRelocateInstance(self)

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Add relocate instance data to allocator structure.

This in combination with _IAllocatorGetClusterData will create the correct structure needed as input for the allocator.

The checks for the completeness of the opcode must have already been done.

_ValidateResult(self)

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Process the allocator results.

This will process and if successful save the result in self.out_data and the other parameters.

_NodesToGroups(node2group, groups, nodes)
Static Method

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Returns a list of unique group names for a list of nodes.

Parameters:

node2group (dict) - Map from node name to group UUID
groups (dict) - Group information
nodes (list) - Node names

Class Variable Details

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_JOB_LIST

Value:

ht.TListOf(ht.TListOf(ht.TStrictDict(True, False, {"OP_ID": ht.TElemOf
([opcodes.OpInstanceFailover.OP_ID, opcodes.OpInstanceMigrate.OP_ID, o
pcodes.OpInstanceReplaceDisks.OP_ID])})))

_NEVAC_MOVED

Value:

ht.TListOf(ht.TAnd(ht.TIsLength(3), ht.TItems([ht.TNonEmptyString, ht.
TNonEmptyString, ht.TListOf(ht.TNonEmptyString),])))

_NEVAC_FAILED

Value:

ht.TListOf(ht.TAnd(ht.TIsLength(2), ht.TItems([ht.TNonEmptyString, ht.
TMaybeString,])))

_NEVAC_RESULT

Value:

ht.TAnd(ht.TIsLength(3), ht.TItems([_NEVAC_MOVED, _NEVAC_FAILED, _JOB_
LIST]))

_MODE_DATA

Value:

{constants.IALLOCATOR_MODE_ALLOC:(_AddNewInstance, [("name", ht.TStrin
g), ("memory", ht.TInt), ("spindle_use", ht.TInt), ("disks", ht.TListO
f(ht.TDict)), ("disk_template", ht.TString), ("os", ht.TString), ("tag
s", _STRING_LIST), ("nics", ht.TListOf(ht.TDict)), ("vcpus", ht.TInt),
 ("hypervisor", ht.TString),], ht.TList), constants.IALLOCATOR_MODE_RE
LOC:(_AddRelocateInstance, [("name", ht.TString), ("relocate_from", _S
TRING_LIST)], ht.TList), constants.IALLOCATOR_MODE_NODE_EVAC:(_AddNode
Evacuate, [("instances", _STRING_LIST), ("evac_mode", ht.TElemOf(const
...

Class IAllocator

__init__(self, cfg, rpc_runner, mode, **kwargs) (Constructor)

_ComputeClusterData(self)

_ComputeBasicNodeData(cfg, node_cfg) Static Method

_ComputeDynamicNodeData(node_cfg, node_data, node_iinfo, i_list, node_results) Static Method

_AddNewInstance(self)

_AddRelocateInstance(self)

_ValidateResult(self)

_NodesToGroups(node2group, groups, nodes) Static Method

_JOB_LIST

_NEVAC_MOVED

_NEVAC_FAILED

_NEVAC_RESULT

_MODE_DATA

init(self, cfg, rpc_runner, mode, **kwargs)
(Constructor)

_ComputeBasicNodeData(cfg, node_cfg)
Static Method

_ComputeDynamicNodeData(node_cfg, node_data, node_iinfo, i_list, node_results)
Static Method

_NodesToGroups(node2group, groups, nodes)
Static Method