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Ganeti
ganeti :: hypervisor :: hv_fake :: FakeHypervisor :: Class FakeHypervisor
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Class FakeHypervisor

source code

Fake hypervisor interface.

This can be used for testing the ganeti code without having to have a real virtualisation software installed.

Instance Methods [hide private]
 
__init__(self)
x.__init__(...) initializes x; see x.__class__.__doc__ for signature		 source code
 
ListInstances(self)
Get the list of running instances.		 source code
 
GetInstanceInfo(self, instance_name)
Get instance properties.		 source code
 
GetAllInstancesInfo(self)
Get properties of all instances.		 source code
 
_IsAlive(self, instance_name)
Checks if an instance is alive.		 source code
 
_MarkUp(self, instance)
Mark the instance as running.		 source code
 
_MarkDown(self, instance_name)
Mark the instance as running.		 source code
 
StartInstance(self, instance, block_devices)
Start an instance.		 source code
 
StopInstance(self, instance, force=False, retry=False, name=None)
Stop an instance.		 source code
 
RebootInstance(self, instance)
Reboot an instance.		 source code
 
GetNodeInfo(self)
Return information about the node.		 source code
 
Verify(self)
Verify the hypervisor.		 source code
 
AcceptInstance(self, instance, info, target)
Prepare to accept an instance.		 source code
 
MigrateInstance(self, instance, target, live)
Migrate an instance.		 source code
 
FinalizeMigration(self, instance, info, success)
Finalize an instance migration.		 source code

Inherited from hv_base.BaseHypervisor: CleanupInstance, MigrationInfo

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

Class Methods [hide private]
 
_InstanceFile(cls, instance_name)
Compute the instance file for an instance name.		 source code
 
GetShellCommandForConsole(cls, instance, hvparams, beparams)
Return a command for connecting to the console of an instance.		 source code
 
PowercycleNode(cls)
Fake hypervisor powercycle, just a wrapper over Linux powercycle.		 source code

Inherited from hv_base.BaseHypervisor: CheckParameterSyntax, GetAncillaryFiles, LinuxPowercycle, ValidateParameters

Static Methods [hide private]

Inherited from hv_base.BaseHypervisor: GetLinuxNodeInfo

Class Variables [hide private]
boolean CAN_MIGRATE = True
whether this hypervisor can do migration (either live or non-live)
  _ROOT_DIR = constants.RUN_GANETI_DIR+ "/fake-hypervisor"

Inherited from hv_base.BaseHypervisor: ANCILLARY_FILES, PARAMETERS

Properties [hide private]

Inherited from object: __class__

Method Details [hide private]

__init__(self)
(Constructor)

source code 

x.__init__(...) initializes x; see x.__class__.__doc__ for signature

Overrides: object.__init__
(inherited documentation)

ListInstances(self)

source code 

Get the list of running instances.

Overrides: hv_base.BaseHypervisor.ListInstances

GetInstanceInfo(self, instance_name)

source code 

Get instance properties.

Parameters:
  • instance_name - the instance name
Returns:
tuple of (name, id, memory, vcpus, stat, times)
Overrides: hv_base.BaseHypervisor.GetInstanceInfo

GetAllInstancesInfo(self)

source code 

Get properties of all instances.

Returns:
list of tuples (name, id, memory, vcpus, stat, times)
Overrides: hv_base.BaseHypervisor.GetAllInstancesInfo

_MarkUp(self, instance)

source code 

Mark the instance as running.

This does no checks, which should be done by its callers.

_MarkDown(self, instance_name)

source code 

Mark the instance as running.

This does no checks, which should be done by its callers.

StartInstance(self, instance, block_devices)

source code 

Start an instance.

For the fake hypervisor, it just creates a file in the base dir, creating an exception if it already exists. We don't actually handle race conditions properly, since these are *FAKE* instances.

Overrides: hv_base.BaseHypervisor.StartInstance

StopInstance(self, instance, force=False, retry=False, name=None)

source code 

Stop an instance.

For the fake hypervisor, this just removes the file in the base dir, if it exist, otherwise we raise an exception.

Parameters:
  • instance - instance to stop
  • force - whether to do a "hard" stop (destroy)
  • retry - whether this is just a retry call
  • name - if this parameter is passed, the the instance object should not be used (will be passed as None), and the shutdown must be done by name only
Overrides: hv_base.BaseHypervisor.StopInstance

RebootInstance(self, instance)

source code 

Reboot an instance.

For the fake hypervisor, this does nothing.

Overrides: hv_base.BaseHypervisor.RebootInstance

GetNodeInfo(self)

source code 

Return information about the node.

This is just a wrapper over the base GetLinuxNodeInfo method.

Returns:
a dict with the following keys (values in MiB):
  • memory_total: the total memory size on the node
  • memory_free: the available memory on the node for instances
  • memory_dom0: the memory used by the node itself, if available
Overrides: hv_base.BaseHypervisor.GetNodeInfo

GetShellCommandForConsole(cls, instance, hvparams, beparams)
Class Method

source code 

Return a command for connecting to the console of an instance.

Overrides: hv_base.BaseHypervisor.GetShellCommandForConsole

Verify(self)

source code 

Verify the hypervisor.

For the fake hypervisor, it just checks the existence of the base dir.

Overrides: hv_base.BaseHypervisor.Verify

PowercycleNode(cls)
Class Method

source code 

Fake hypervisor powercycle, just a wrapper over Linux powercycle.

Overrides: hv_base.BaseHypervisor.PowercycleNode

AcceptInstance(self, instance, info, target)

source code 

Prepare to accept an instance.

Parameters:
  • instance (objects.Instance) - instance to be accepted
  • info (string) - instance info, not used
  • target (string) - target host (usually ip), on this node
Overrides: hv_base.BaseHypervisor.AcceptInstance

MigrateInstance(self, instance, target, live)

source code 

Migrate an instance.

Parameters:
  • instance (objects.Instance) - the instance to be migrated
  • target (string) - hostname (usually ip) of the target node
  • live (boolean) - whether to do a live or non-live migration
Overrides: hv_base.BaseHypervisor.MigrateInstance

FinalizeMigration(self, instance, info, success)

source code 

Finalize an instance migration.

For the fake hv, this just marks the instance up.

Parameters:
Overrides: hv_base.BaseHypervisor.FinalizeMigration

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