Package ganeti :: Package masterd :: Module iallocator :: Class IAllocator

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Class IAllocator

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

__init__(self, cfg, rpc_runner, req)
x.__init__(...) initializes x; see help(type(x)) for signature

source code

_ComputeClusterData(self)
Compute the generic allocator input data.

source code

_BuildInputData(self, req)
Build input data structures.

source code

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

source code

_ValidateResult(self)
Process the allocator results.

source code

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

Static Methods

_ComputeNodeGroupData(cfg)
Compute node groups data.

source code

dict

_ComputeBasicNodeData(cfg, node_cfg, node_whitelist)
Compute global node data.

source code

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

source code

_ComputeInstanceData(cluster_info, i_list)
Compute global instance data.

source code

Properties

Inherited from object: __class__

Method Details

init(self, cfg, rpc_runner, req)
(Constructor)

x.__init__(...) initializes x; see help(type(x)) for signature

Overrides: object.__init__: (inherited documentation)

_ComputeClusterData(self)

Compute the generic allocator input data.

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

_ComputeBasicNodeData(cfg, node_cfg, node_whitelist)
Static Method

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, has_lvm)
Static Method

Compute global node data.

Parameters:

node_results - the basic node structures as filled from the config

_ValidateResult(self)

Process the allocator results.

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