ganeti.backend.DevCacheManager

class documentation

class DevCacheManager(object):

Simple class for managing a cache of block device information.

Class Method	`RemoveCache`	Remove data for a dev_path.
Class Method	`UpdateCache`	Updates the cache information for a given device.
Class Method	`_ConvertPath`	Converts a /dev/name path to the cache file name.
Constant	`_DEV_PREFIX`	Undocumented

@classmethod
def RemoveCache(cls, dev_path): ¶

Remove data for a dev_path.

This is just a wrapper over utils.io.RemoveFile with a converted path name and logging.

@classmethod
def UpdateCache(cls, dev_path, owner, on_primary, iv_name): ¶

Updates the cache information for a given device.

Parameters
dev_path:str	the pathname of the device
owner:str	the owner (instance name) of the device
on_primary:bool	whether this is the primary node nor not
iv_name:str	the instance-visible name of the device, as in objects.Disk.iv_name
Returns
None	Undocumented

@classmethod
def _ConvertPath(cls, dev_path): ¶

Converts a /dev/name path to the cache file name.

This replaces slashes with underscores and strips the /dev prefix. It then returns the full path to the cache file.

_DEV_PREFIX: str = ¶

Undocumented

Value

'/dev/'