Package ganeti :: Module cmdlib :: Class LUExportInstance
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Class LUExportInstance

source code


Export an instance to an image in the cluster.

Instance Methods [hide private]
 
CheckArguments(self)
Check the arguments.
source code
 
ExpandNames(self)
Expand names for this LU.
source code
 
DeclareLocks(self, level)
Last minute lock declaration.
source code
 
BuildHooksEnv(self)
Build hooks env.
source code
 
CheckPrereq(self)
Check prerequisites.
source code
 
_CleanupExports(self, feedback_fn)
Removes exports of current instance from all other nodes.
source code
 
Exec(self, feedback_fn)
Export an instance to an image in the cluster.
source code

Inherited from LogicalUnit: HooksCallBack, __init__

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

Class Variables [hide private]
  HPATH = "instance-export"
  HTYPE = "INSTANCE"
  _OP_PARAMS = [_PInstanceName, ("target_node", ht.NoDefault, ht...
a list of opcode attributes, their defaults values they should get if not already defined, and types they must match
  REQ_BGL = False

Inherited from LogicalUnit: ssh

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 the arguments.

Overrides: LogicalUnit.CheckArguments

ExpandNames(self)

source code 

Expand names for this LU.

This method is called before starting to execute the opcode, and it should update all the parameters of the opcode to their canonical form (e.g. a short node name must be fully expanded after this method has successfully completed). This way locking, hooks, logging, ecc. can work correctly.

LUs which implement this method must also populate the self.needed_locks member, as a dict with lock levels as keys, and a list of needed lock names as values. Rules:

  • use an empty dict if you don't need any lock
  • if you don't need any lock at a particular level omit that level
  • don't put anything for the BGL level
  • if you want all locks at a level use locking.ALL_SET as a value

If you need to share locks (rather than acquire them exclusively) at one level you can modify self.share_locks, setting a true value (usually 1) for that level. By default locks are not shared.

This function can also define a list of tasklets, which then will be executed in order instead of the usual LU-level CheckPrereq and Exec functions, if those are not defined by the LU.

Examples:

 # Acquire all nodes and one instance
 self.needed_locks = {
   locking.LEVEL_NODE: locking.ALL_SET,
   locking.LEVEL_INSTANCE: ['instance1.example.com'],
 }
 # Acquire just two nodes
 self.needed_locks = {
   locking.LEVEL_NODE: ['node1.example.com', 'node2.example.com'],
 }
 # Acquire no locks
 self.needed_locks = {} # No, you can't leave it to the default value None
Overrides: LogicalUnit.ExpandNames
(inherited documentation)

DeclareLocks(self, level)

source code 

Last minute lock declaration.

Parameters:
  • level - Locking level which is going to be locked
Overrides: LogicalUnit.DeclareLocks

BuildHooksEnv(self)

source code 

Build hooks env.

This will run on the master, primary node and target node.

Overrides: LogicalUnit.BuildHooksEnv

CheckPrereq(self)

source code 

Check prerequisites.

This checks that the instance and node names are valid.

Overrides: LogicalUnit.CheckPrereq

_CleanupExports(self, feedback_fn)

source code 

Removes exports of current instance from all other nodes.

If an instance in a cluster with nodes A..D was exported to node C, its exports will be removed from the nodes A, B and D.

Exec(self, feedback_fn)

source code 

Export an instance to an image in the cluster.

Overrides: LogicalUnit.Exec

Class Variable Details [hide private]

_OP_PARAMS

a list of opcode attributes, their defaults values they should get if not already defined, and types they must match
Value:
[_PInstanceName, ("target_node", ht.NoDefault, ht.TOr(ht.TNonEmptyStri\
ng, ht.TList)), ("shutdown", True, ht.TBool), _PShutdownTimeout, ("rem\
ove_instance", False, ht.TBool), ("ignore_remove_failures", False, ht.\
TBool), ("mode", constants.EXPORT_MODE_LOCAL, ht.TElemOf(constants.EXP\
ORT_MODES)), ("x509_key_name", None, ht.TOr(ht.TList, ht.TNone)), ("de\
stination_x509_ca", None, ht.TMaybeString),]