Package ganeti :: Package cmdlib :: Module instance :: Class LUInstanceCreate

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Class LUInstanceCreate

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Create an instance.

Instance Methods

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_CheckDiskTemplateValid(self)
Checks validity of disk template.

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_CheckDiskArguments(self)
Checks validity of disk-related arguments.

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CheckArguments(self)
Check arguments.

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ExpandNames(self)
ExpandNames for CreateInstance.

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DeclareLocks(self, level)
Declare LU locking needs for a level

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_RunAllocator(self)
Run the allocator based on input opcode.

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dict

BuildHooksEnv(self)
Build hooks env.

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tuple; (list, list) or (list, list, list)

BuildHooksNodes(self)
Build hooks nodes.

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_ReadExportInfo(self)
Reads the export information from disk.

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_ReadExportParams(self, einfo)
Use export parameters as defaults.

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_RevertToDefaults(self, cluster)
Revert the instance parameters to the default values.

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_CalculateFileStorageDir(self)
Calculate final instance file storage dir.

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CheckPrereq(self)
Check prerequisites.

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Exec(self, feedback_fn)
Create and add the instance to the cluster.

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Inherited from base.LogicalUnit: HooksCallBack, __init__

Inherited from base.LogicalUnit (private): _ExpandAndLockInstance, _LockInstancesNodes

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

Class Variables

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HPATH = "instance-add"

HTYPE = "INSTANCE"

REQ_BGL = False

Instance Variables

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Inherited from base.LogicalUnit: dry_run_result

Properties

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Inherited from object: __class__

Method Details

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CheckArguments(self)

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Check arguments.

Overrides: base.LogicalUnit.CheckArguments

ExpandNames(self)

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ExpandNames for CreateInstance.

Figure out the right locks for instance creation.

Overrides: base.LogicalUnit.ExpandNames

DeclareLocks(self, level)

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Declare LU locking needs for a level

While most LUs can just declare their locking needs at ExpandNames time, sometimes there's the need to calculate some locks after having acquired the ones before. This function is called just before acquiring locks at a particular level, but after acquiring the ones at lower levels, and permits such calculations. It can be used to modify self.needed_locks, and by default it does nothing.

This function is only called if you have something already set in self.needed_locks for the level.

Parameters:

level - Locking level which is going to be locked

Overrides: base.LogicalUnit.DeclareLocks

(inherited documentation)

BuildHooksEnv(self)

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Build hooks env.

This runs on master, primary and secondary nodes of the instance.

Returns: dict: Dictionary containing the environment that will be used for running the hooks for this LU. The keys of the dict must not be prefixed with "GANETI_"--that'll be added by the hooks runner. The hooks runner will extend the environment with additional variables. If no environment should be defined, an empty dictionary should be returned (not None).
Overrides: base.LogicalUnit.BuildHooksEnv

BuildHooksNodes(self)

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Build hooks nodes.

Returns: tuple; (list, list) or (list, list, list): Tuple containing a list of node UUIDs on which the hook should run before the execution and a list of node UUIDs on which the hook should run after the execution. As it might be possible that the node UUID is not known at the time this method is invoked, an optional third list can be added which contains node names on which the hook should run after the execution (in case of node add, for instance). No nodes should be returned as an empty list (and not None).
Overrides: base.LogicalUnit.BuildHooksNodes

_ReadExportInfo(self)

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Reads the export information from disk.

It will override the opcode source node and path with the actual information, if these two were not specified before.

Returns:: the export information

_ReadExportParams(self, einfo)

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Use export parameters as defaults.

In case the opcode doesn't specify (as in override) some instance parameters, then try to use them from the export information, if that declares them.

CheckPrereq(self)

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Check prerequisites.

Overrides: base.LogicalUnit.CheckPrereq

Exec(self, feedback_fn)

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Create and add the instance to the cluster.

Overrides: base.LogicalUnit.Exec