Package ganeti :: Package hypervisor :: Module hv_xen

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Module hv_xen

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Xen hypervisors

Classes

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XenHypervisor
Xen generic hypervisor interface

XenPvmHypervisor
Xen PVM hypervisor interface

XenHvmHypervisor
Xen HVM hypervisor interface

Functions

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_CreateConfigCpus(cpu_mask)
Create a CPU config string for Xen's config file.

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list

_RunInstanceList(fn, instance_list_errors)
Helper function for _GetInstanceList to retrieve the list of instances from xen.

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_ParseInstanceList(lines, include_node)
Parses the output of listing instances by xen.

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_GetInstanceList(fn, include_node, _timeout=5)
Return the list of running instances.

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_IsInstanceRunning(instance_info)

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_IsInstanceShutdown(instance_info)

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_ParseNodeInfo(info)
Return information about the node.

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dict

_MergeInstanceInfo(info, instance_list)
Updates node information from _ParseNodeInfo with instance info.

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_GetNodeInfo(info, instance_list)
Combines _MergeInstanceInfo and _ParseNodeInfo.

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_GetConfigFileDiskData(block_devices, blockdev_prefix, _letters=_DISK_LETTERS)
Get disk directives for Xen config file.

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Variables

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XEND_CONFIG_FILE = utils.PathJoin(pathutils.XEN_CONFIG_DIR, "x...

XL_CONFIG_FILE = utils.PathJoin(pathutils.XEN_CONFIG_DIR, "xen...

VIF_BRIDGE_SCRIPT = utils.PathJoin(pathutils.XEN_CONFIG_DIR, "...

_DOM0_NAME = "Domain-0"

_DISK_LETTERS = string.ascii_lowercase

_FILE_DRIVER_MAP = {constants.FD_LOOP: "file", constants.FD_BL...

Imports: logging, errno, string, shutil, StringIO, constants, errors, utils, hv_base, netutils, objects, pathutils

Function Details

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_RunInstanceList(fn, instance_list_errors)

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Helper function for _GetInstanceList to retrieve the list of instances from xen.

Parameters:

fn (callable) - Function to query xen for the list of instances
instance_list_errors (list) - Error list

Returns: list

_ParseInstanceList(lines, include_node)

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Parses the output of listing instances by xen.

Parameters:

lines (list) - Result of retrieving the instance list from xen
include_node (boolean) - If True, return information for Dom0

Returns:

list of tuple containing (name, id, memory, vcpus, state, time spent)

_GetInstanceList(fn, include_node, _timeout=5)

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Return the list of running instances.

See _RunInstanceList and _ParseInstanceList for parameter details.

_ParseNodeInfo(info)

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Return information about the node.

Returns:

a dict with the following keys (memory values in MiB):

memory_total: the total memory size on the node
memory_free: the available memory on the node for instances
nr_cpus: total number of CPUs
nr_nodes: in a NUMA system, the number of domains
nr_sockets: the number of physical CPU sockets in the node
hv_version: the hypervisor version in the form (major, minor)

_MergeInstanceInfo(info, instance_list)

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Updates node information from _ParseNodeInfo with instance info.

Parameters:

info (dict) - Result from _ParseNodeInfo
instance_list (list of tuples) - list of instance information; one tuple per instance

Returns: dict

_GetNodeInfo(info, instance_list)

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Combines _MergeInstanceInfo and _ParseNodeInfo.

Parameters:

instance_list (list of tuples) - list of instance information; one tuple per instance

_GetConfigFileDiskData(block_devices, blockdev_prefix, _letters=_DISK_LETTERS)

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Get disk directives for Xen config file.

This method builds the xen config disk directive according to the given disk_template and block_devices.

Parameters:

block_devices - list of tuples (cfdev, rldev):
- cfdev: dict containing ganeti config disk part
- rldev: ganeti.block.bdev.BlockDev object
blockdev_prefix - a string containing blockdevice prefix, e.g. "sd" for /dev/sda

Returns:

string containing disk directive for xen instance config file

Variables Details

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XEND_CONFIG_FILE

Value:

utils.PathJoin(pathutils.XEN_CONFIG_DIR, "xend-config.sxp")

XL_CONFIG_FILE

Value:

utils.PathJoin(pathutils.XEN_CONFIG_DIR, "xen/xl.conf")

VIF_BRIDGE_SCRIPT

Value:

utils.PathJoin(pathutils.XEN_CONFIG_DIR, "scripts/vif-bridge")

_FILE_DRIVER_MAP

Value:

{constants.FD_LOOP: "file", constants.FD_BLKTAP: "tap:aio", constants.
FD_BLKTAP2: "tap2:tapdisk:aio",}