ganeti.cmdlib.node.LUNodePowercycle

class documentation

class LUNodePowercycle(NoHooksLU):

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Powercycles a node.

Method CheckArguments Check syntactic validity for the opcode arguments.
Method Exec Reboots a node.
Method ExpandNames Locking for PowercycleNode.
Constant REQ_BGL Undocumented
Instance Variable needed_locks Undocumented

Inherited from NoHooksLU:

Method BuildHooksEnv Empty BuildHooksEnv for NoHooksLu.
Method BuildHooksNodes Empty BuildHooksNodes for NoHooksLU.
Method PreparePostHookNodes Empty PreparePostHookNodes for NoHooksLU.
Constant HPATH Undocumented
Constant HTYPE Undocumented

Inherited from LogicalUnit (via NoHooksLU):

Method __init__ Constructor for LogicalUnit.
Method AssertReleasedLocks Raise AssertionError if the LU holds some locks of the given level.
Method CheckPrereq Check prerequisites for this LU.
Method DeclareLocks Declare LU locking needs for a level
Method HooksCallBack Notify the LU about the results of its hooks.
Method owned_locks Return the list of locks owned by the LU at a given level.
Method PrepareRetry Prepare the LU to run again.
Method release_request Return a request to release the specified locks of the given level.
Method WConfdClient Undocumented
Instance Variable add_locks Undocumented
Instance Variable cfg Undocumented
Instance Variable dont_collate_locks Undocumented
Instance Variable dry_run_result the value (if any) that will be returned to the caller in dry-run mode (signalled by opcode dry_run parameter)
Instance Variable Log Undocumented
Instance Variable LogInfo Undocumented
Instance Variable LogStep Undocumented
Instance Variable LogWarning Undocumented
Instance Variable op Undocumented
Instance Variable opportunistic_locks Undocumented
Instance Variable opportunistic_locks_count Undocumented
Instance Variable proc Undocumented
Instance Variable recalculate_locks Undocumented
Instance Variable rpc Undocumented
Instance Variable share_locks Undocumented
Instance Variable tasklets Undocumented
Instance Variable wconfd Undocumented
Instance Variable wconfdcontext Undocumented
Instance Variable wconfdlocks Undocumented
Method _ExpandAndLockInstance Helper function to expand and lock an instance.
Method _LockInstancesNodes Helper function to declare instances' nodes for locking.
def CheckArguments(self):
overrides ganeti.cmdlib.base.LogicalUnit.CheckArguments

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.

def Exec(self, feedback_fn):
overrides ganeti.cmdlib.base.LogicalUnit.Exec

Reboots a node.

def ExpandNames(self):
overrides ganeti.cmdlib.base.LogicalUnit.ExpandNames

Locking for PowercycleNode.

This is a last-resort option and shouldn't block on other jobs. Therefore, we grab no locks.

REQ_BGL: bool =
overrides ganeti.cmdlib.base.LogicalUnit.REQ_BGL

Undocumented

Value
False
needed_locks: dict =
overrides ganeti.cmdlib.base.LogicalUnit.needed_locks

Undocumented