Package ganeti :: Module cmdlib :: Class LUNodeAdd
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Class LUNodeAdd

source code


Logical unit for adding node to the cluster.

Instance Methods [hide private]
 
CheckArguments(self)
Check syntactic validity for the opcode arguments.
source code
dict
BuildHooksEnv(self)
Build hooks env.
source code
tuple; (list, list)
BuildHooksNodes(self)
Build hooks nodes.
source code
 
CheckPrereq(self)
Check prerequisites.
source code
 
Exec(self, feedback_fn)
Adds the new node to the cluster.
source code

Inherited from LogicalUnit: DeclareLocks, ExpandNames, HooksCallBack, __init__

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

Class Variables [hide private]
  HPATH = "node-add"
  HTYPE = "NODE"
  _NFLAGS = ["master_capable", "vm_capable"]

Inherited from LogicalUnit: REQ_BGL

Instance Variables [hide private]

Inherited from LogicalUnit: dry_run_result

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

CheckArguments(self)

source code 

Check syntactic validity for the opcode arguments.

This method is for doing a simple syntactic check and ensure validity of opcode parameters, without any cluster-related checks. While the same can be accomplished in ExpandNames and/or CheckPrereq, doing these separate is better because:

  • ExpandNames is left as as purely a lock-related function
  • CheckPrereq is run after we have acquired locks (and possible waited for them)

The function is allowed to change the self.op attribute so that later methods can no longer worry about missing parameters.

Overrides: LogicalUnit.CheckArguments
(inherited documentation)

BuildHooksEnv(self)

source code 

Build hooks env.

This will run on all nodes before, and on all nodes + the new node after.

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: LogicalUnit.BuildHooksEnv

BuildHooksNodes(self)

source code 

Build hooks nodes.

Returns: tuple; (list, list)
Tuple containing a list of node names on which the hook should run before the execution and a list of node names on which the hook should run after the execution. No nodes should be returned as an empty list (and not None).
Overrides: LogicalUnit.BuildHooksNodes

CheckPrereq(self)

source code 

Check prerequisites.

This checks:

  • the new node is not already in the config
  • it is resolvable
  • its parameters (single/dual homed) matches the cluster

Any errors are signaled by raising errors.OpPrereqError.

Overrides: LogicalUnit.CheckPrereq

Exec(self, feedback_fn)

source code 

Adds the new node to the cluster.

Overrides: LogicalUnit.Exec