/usr/share/pyshared/archipelagenthypervisornetwork/network.py is in archipel-agent-hypervisor-network 0.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# network.py
#
# Copyright (C) 2010 Antoine Mercadal <antoine.mercadal@inframonde.eu>
# Copyright, 2011 - Franck Villaume <franck.villaume@trivialdev.com>
# This file is part of ArchipelProject
# http://archipelproject.org
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import commands
import libvirt
import os
import xmpp
from archipelcore.archipelPlugin import TNArchipelPlugin
from archipelcore.utils import build_error_iq, build_error_message
from archipel.archipelLibvirtEntity import ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR
ARCHIPEL_NS_HYPERVISOR_NETWORK = "archipel:hypervisor:network"
ARCHIPEL_ERROR_CODE_NETWORKS_DEFINE = -7001
ARCHIPEL_ERROR_CODE_NETWORKS_UNDEFINE = -7002
ARCHIPEL_ERROR_CODE_NETWORKS_CREATE = -7003
ARCHIPEL_ERROR_CODE_NETWORKS_DESTROY = -7004
ARCHIPEL_ERROR_CODE_NETWORKS_GET = -7005
ARCHIPEL_ERROR_CODE_NETWORKS_BRIDGES = -7006
ARCHIPEL_ERROR_CODE_NETWORKS_GETNAMES = -7007
ARCHIPEL_ERROR_CODE_NETWORKS_GETNICS = -7008
ARCHIPEL_ERROR_CODE_NETWORKS_GETNWFILTERS = -7009
class TNHypervisorNetworks (TNArchipelPlugin):
def __init__(self, configuration, entity, entry_point_group):
"""
Initialize the plugin.
@type configuration: Configuration object
@param configuration: the configuration
@type entity: L{TNArchipelEntity}
@param entity: the entity that owns the plugin
@type entry_point_group: string
@param entry_point_group: the group name of plugin entry_point
"""
TNArchipelPlugin.__init__(self, configuration=configuration, entity=entity, entry_point_group=entry_point_group)
self.folder_nwfilters = self.configuration.get("NETWORKS", "libvirt_nw_filters_path")
if not os.path.exists(self.folder_nwfilters):
self.folder_nwfilters = None
self.entity.log.warning("NETWORK: unable to find network filter folder at path %s. agent will not offer any network filter")
# permissions
if self.entity.__class__.__name__ == "TNArchipelVirtualMachine":
self.entity.permission_center.create_permission("network_getnames", "Authorizes user to get the existing network names", False)
self.entity.permission_center.create_permission("network_bridges", "Authorizes user to get existing bridges", False)
elif self.entity.__class__.__name__ == "TNArchipelHypervisor":
self.entity.permission_center.create_permission("network_define", "Authorizes user to define a network", False)
self.entity.permission_center.create_permission("network_undefine", "Authorizes user to undefine a network", False)
self.entity.permission_center.create_permission("network_create", "Authorizes user to create (start) a network", False)
self.entity.permission_center.create_permission("network_destroy", "Authorizes user to destroy (stop) a network", False)
self.entity.permission_center.create_permission("network_get", "Authorizes user to get all networks informations", False)
self.entity.permission_center.create_permission("network_getnames", "Authorizes user to get the existing network names", False)
self.entity.permission_center.create_permission("network_bridges", "Authorizes user to get existing bridges", False)
self.entity.permission_center.create_permission("network_getnics", "Authorizes user to get existing network interfaces", False)
self.entity.permission_center.create_permission("network_getnwfilters", "Authorizes user to get existing libvirt network filters", False)
registrar_items = [
{ "commands" : ["list networks"],
"parameters": [],
"method": self.message_get,
"permissions": ["network_get"],
"description": "List all networks" },
{ "commands" : ["create network", "start network"],
"parameters": [{"name": "identifier", "description": "The identifer of the network, UUID or name"}],
"method": self.message_create,
"permissions": ["network_create"],
"description": "Start the given network" },
{ "commands" : ["destroy network", "stop network"],
"parameters": [{"name": "identifier", "description": "The identifer of the network, UUID or name"}],
"method": self.message_destroy,
"permissions": ["network_destroy"],
"description": "Stop the given network" },
{ "commands" : ["nics", "network cards"],
"parameters": [],
"method": self.message_getnics,
"permissions": ["network_getnics"],
"description": "Get the list of all my network interfaces" }
]
self.entity.add_message_registrar_items(registrar_items)
### Plugin implementation
def register_handlers(self):
"""
This method will be called by the plugin user when it will be
necessary to register module for listening to stanza.
"""
if self.entity.__class__.__name__ == "TNArchipelVirtualMachine":
self.entity.xmppclient.RegisterHandler('iq', self.process_iq_for_virtualmachine, ns=ARCHIPEL_NS_HYPERVISOR_NETWORK)
elif self.entity.__class__.__name__ == "TNArchipelHypervisor":
self.entity.xmppclient.RegisterHandler('iq', self.process_iq_for_hypervisor, ns=ARCHIPEL_NS_HYPERVISOR_NETWORK)
def unregister_handlers(self):
"""
Unregister the handlers.
"""
if self.entity.__class__.__name__ == "TNArchipelVirtualMachine":
self.entity.xmppclient.UnregisterHandler('iq', self.process_iq_for_virtualmachine, ns=ARCHIPEL_NS_HYPERVISOR_NETWORK)
elif self.entity.__class__.__name__ == "TNArchipelHypervisor":
self.entity.xmppclient.UnregisterHandler('iq', self.process_iq_for_hypervisor, ns=ARCHIPEL_NS_HYPERVISOR_NETWORK)
@staticmethod
def plugin_info():
"""
Return informations about the plugin.
@rtype: dict
@return: dictionary contaning plugin informations
"""
plugin_friendly_name = "Hypervisor Networks"
plugin_identifier = "hypervisor_network"
plugin_configuration_section = "NETWORKS"
plugin_configuration_tokens = ["libvirt_nw_filters_path"]
return { "common-name" : plugin_friendly_name,
"identifier" : plugin_identifier,
"configuration-section" : plugin_configuration_section,
"configuration-tokens" : plugin_configuration_tokens }
### Utilities
def get_network_with_identifier(self, identifier):
"""
Return a libvirtNetwork according to the identifier, which can be the name or the UUID
@type identifier: String
@param identifier: the name or the UUID of the network
@rtype: libvirtNetwork
@return: the network object with given identifier
"""
try:
try:
libvirt_network = self.entity.libvirt_connection.networkLookupByName(identifier)
except:
libvirt_network = self.entity.libvirt_connection.networkLookupByUUIDString(identifier)
return libvirt_network
except Exception as ex:
self.entity.log.error("NETWORK: Unable to find a network with identifier %s: %s" % (identifier, str(ex)))
raise Exception("Unable to find a network with identifier %s" % identifier)
### libvirt controls
def get(self, active=True, inactive=True):
"""
Get the list of networks.
@type active: bool
@param active: if True, will return active network
@type inactive: bool
@param inactive: if True, will return not active network
@rtype: dict
@return: a list containing networtks
"""
ret = {}
if self.entity.__class__.__name__ == "TNArchipelVirtualMachine":
libvirt_connection = self.entity.hypervisor.libvirt_connection
else:
libvirt_connection = self.entity.libvirt_connection
if active:
ret["active"] = libvirt_connection.listNetworks()
if inactive:
ret["inactive"] = libvirt_connection.listDefinedNetworks()
return ret
def create(self, identifier):
"""
Create (start) the network with given identifier.
@type identifier: string
@param identifier: the identifer of the network to create. It can be its name or UUID
"""
libvirt_network = self.get_network_with_identifier(identifier)
libvirt_network.create()
self.entity.log.info("NETWORK: Virtual network %s created." % identifier)
self.entity.push_change("network", "created")
def destroy(self, identifier):
"""
destroy (stop) the network with given identifier
@type identifier: string
@param identifier: the identifer of the network to destroy. It can be its name or UUID
"""
libvirt_network = self.get_network_with_identifier(identifier)
libvirt_network.destroy()
self.entity.log.info("NETWORK: virtual network %s destroyed" % identifier)
self.entity.push_change("network", "destroyed")
def define(self, definition):
"""
define the network
@type definition: string
@param definition: the XML definition to use
"""
self.entity.libvirt_connection.networkDefineXML(str(definition))
self.entity.log.info("NETWORK: Virtual network XML is defined.")
self.entity.push_change("network", "defined")
def undefine(self, identifier):
"""
Undefine the network with given identifier.
@type identifier: string
@param identifier: the identifer of the network to destroy. It can be its name or UUID
"""
libvirt_network = self.get_network_with_identifier(identifier)
libvirt_network.undefine()
self.entity.log.info("NETWORK: Virtual network %s is undefined." % identifier)
self.entity.push_change("network", "undefined")
def getnics(self):
"""
Return the list of all network interfaces.
@rtype: list
@return: list containing network cards names
"""
f = open('/proc/net/dev', 'r')
content = f.read()
f.close()
splitted = content.split('\n')[2:-1]
return map(lambda x: x.split(":")[0].replace(" ", ""), splitted)
def getnwfilters(self):
"""
Return the list of all libvirt network filters.
@rtype: list
@return: list containing network cards names
"""
ret = []
if not self.folder_nwfilters:
return ret
for nwfilter in os.listdir(self.folder_nwfilters):
ret.append(os.path.splitext(nwfilter)[0])
return ret
def setAutostart(self, identifier, shouldAutostart):
"""
Set the network to start with the host
@type network_identifier: string
@param identifier: the UUID or the name of the network
@type identifier: boolean
@param shouldAutostart: set if autostart should be set
@rtype: integer
@return: the result of the libvirt call
"""
libvirt_network = self.get_network_with_identifier(identifier)
return libvirt_network.setAutostart(shouldAutostart)
def getAutostart(self, identifier):
"""
Set the network to start with the host
@type identifier: string
@param identifier: the UUID or the name of the network
@rtype: Boolean
@return: True is network is in autostart mode
"""
libvirt_network = self.get_network_with_identifier(identifier)
return libvirt_network.autostart()
### XMPP Processing
def process_iq_for_hypervisor(self, conn, iq):
"""
This method is invoked when a ARCHIPEL_NS_HYPERVISOR_NETWORK IQ is received.
It understands IQ of type:
- define
- undefine
- create
- destroy
- get
- bridges
- getnames
- getnics
@type conn: xmpp.Dispatcher
@param conn: ths instance of the current connection that send the stanza
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
"""
reply = None
action = self.entity.check_acp(conn, iq)
self.entity.check_perm(conn, iq, action, -1, prefix="network_")
if action == "define":
reply = self.iq_define(iq)
elif action == "undefine":
reply = self.iq_undefine(iq)
elif action == "create":
reply = self.iq_create(iq)
elif action == "destroy":
reply = self.iq_destroy(iq)
elif action == "get":
reply = self.iq_get(iq)
elif action == "bridges":
reply = self.iq_bridges(iq)
elif action == "getnames":
reply = self.iq_get_names(iq)
elif action == "getnics":
reply = self.iq_get_nics(iq)
if reply:
conn.send(reply)
raise xmpp.protocol.NodeProcessed
def process_iq_for_virtualmachine(self, conn, iq):
"""
This method is invoked when a ARCHIPEL_NS_HYPERVISOR_NETWORK IQ is received.
It understands IQ of type:
- bridges
- getnames
- getnics
- getnwfilters
@type conn: xmpp.Dispatcher
@param conn: ths instance of the current connection that send the stanza
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
"""
reply = None
action = self.entity.check_acp(conn, iq)
self.entity.check_perm(conn, iq, action, -1, prefix="network_")
if action == "getnames":
reply = self.iq_get_names(iq)
elif action == "bridges":
reply = self.iq_bridges(iq)
elif action == "getnics":
reply = self.iq_get_nics(iq)
elif action == "getnwfilters":
reply = self.iq_get_nwfilters(iq)
if reply:
conn.send(reply)
raise xmpp.protocol.NodeProcessed
def iq_define(self, iq):
"""
Define a virtual network in the libvirt according to the XML data
network passed in argument.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
network_node = iq.getTag("query").getTag("archipel").getTag("network")
self.define(network_node)
if iq.getTag("query").getTag("archipel").getAttr("autostart") == "1":
self.setAutostart(network_node.getTag("uuid").getData(), True)
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_DEFINE)
return reply
def iq_undefine(self, iq):
"""
Undefine a virtual network in the libvirt according to name passed in argument.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
network_uuid = iq.getTag("query").getTag("archipel").getAttr("uuid")
self.undefine(network_uuid)
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_UNDEFINE)
return reply
def iq_create(self, iq):
"""
Create a network using libvirt connection.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
network_uuid = iq.getTag("query").getTag("archipel").getAttr("uuid")
self.create(network_uuid)
reply = iq.buildReply("result")
self.entity.shout("network", "Network %s has been started by %s." % (network_uuid, iq.getFrom()))
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_CREATE)
return reply
def message_create(self, msg):
"""
Handle the creation request message.
@type msg: xmpp.Protocol.Message
@param msg: the received message
@rtype: xmpp.Protocol.Message
@return: a ready to send Message containing the result of the action
"""
try:
tokens = msg.getBody().split()
if not len(tokens) == 3:
return "I'm sorry, you use a wrong format. You can type 'help' to get help."
identifier = tokens[-1:][0]
self.create(identifier)
return "Starting network %s" % identifier
except Exception as ex:
return build_error_message(self, ex, msg)
def iq_destroy(self, iq):
"""
Destroy a network using libvirt connection.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
network_uuid = iq.getTag("query").getTag("archipel").getAttr("uuid")
self.destroy(network_uuid)
reply = iq.buildReply("result")
self.entity.shout("network", "Network %s has been shutdowned by %s." % (network_uuid, iq.getFrom()))
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_DESTROY)
return reply
def message_destroy(self, msg):
"""
Handle the destroying request message.
@type msg: xmpp.Protocol.Message
@param msg: the message containing the request
@rtype: string
@return: the answer
"""
try:
tokens = msg.getBody().split()
if not len(tokens) == 3:
return "I'm sorry, you use a wrong format. You can type 'help' to get help."
identifier = tokens[-1:][0]
self.destroy(identifier)
return "Destroying network %s" % identifier
except Exception as ex:
return build_error_message(self, ex, msg)
def iq_get(self, iq):
"""
List all virtual networks.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
active_networks_nodes = []
inactive_networks_nodes = []
networks = self.get()
for network_name in networks["active"]:
network = self.entity.libvirt_connection.networkLookupByName(network_name)
desc = network.XMLDesc(0)
n = xmpp.simplexml.NodeBuilder(data=desc).getDom()
n.setAttr("autostart", self.getAutostart(network_name))
active_networks_nodes.append(n)
for network_name in networks["inactive"]:
network = self.entity.libvirt_connection.networkLookupByName(network_name)
desc = network.XMLDesc(0)
n = xmpp.simplexml.NodeBuilder(data=desc).getDom()
n.setAttr("autostart", self.getAutostart(network_name))
inactive_networks_nodes.append(n)
active_networks_root_node = xmpp.Node(tag="activedNetworks", payload=active_networks_nodes)
inactive_networks_root_node = xmpp.Node(tag="unactivedNetworks", payload=inactive_networks_nodes)
reply.setQueryPayload([active_networks_root_node, inactive_networks_root_node])
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_GET)
return reply
def message_get(self, msg):
"""
Create the message response to list network.
@type msg: xmpp.Protocol.Message
@param msg: the message containing the request
@rtype: string
@return: the answer
"""
try:
networks = self.get()
ret = "Sure. Here are my current active networks:\n"
for net in networks["active"]:
ret += " - %s\n" % net
ret += "\n and my unactive network:\n"
for net in networks["inactive"]:
ret += " - %s\n" % net
return ret
except Exception as ex:
return build_error_message(self, ex, msg)
def iq_get_names(self, iq):
"""
List all virtual network names.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
active_networks_nodes = []
actives_networks_names = self.get(inactive=False)["active"]
for network_name in actives_networks_names:
network = xmpp.Node(tag="network", attrs={"name": network_name})
active_networks_nodes.append(network)
reply.setQueryPayload(active_networks_nodes)
except libvirt.libvirtError as ex:
reply = build_error_iq(self, ex, iq, ex.get_error_code(), ns=ARCHIPEL_NS_LIBVIRT_GENERIC_ERROR)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_GETNAMES)
return reply
def iq_bridges(self, iq):
"""
List all bridge names.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
output = commands.getoutput("brctl show | grep -v -E '^[[:space:]]'")
lines = output.split("\n")[1:]
bridges_names = []
for line in lines:
bridge_name = line.split()[0]
bridge_node = xmpp.Node(tag="bridge", attrs={"name": bridge_name})
bridges_names.append(bridge_node)
reply.setQueryPayload(bridges_names)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_BRIDGES)
return reply
def iq_get_nics(self, iq):
"""
List all existing networks cards on the hypervisor.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
nodes = []
for n in self.getnics():
nodes.append(xmpp.Node("nic", attrs={"name": n}))
reply.setQueryPayload(nodes)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_GETNICS)
return reply
def message_getnics(self, msg):
"""
Get all the nics of the hypervisor.
@type msg: xmpp.Protocol.Message
@param msg: the message containing the request
@rtype: string
@return: the answer
"""
try:
nics = self.getnics()
ret = "Sure. Here are my current available network interfaces:\n"
for n in nics:
ret += " - %s\n" % n
return ret
except Exception as ex:
return build_error_message(self, ex, msg)
def iq_get_nwfilters(self, iq):
"""
List all existing libvirt network filters.
@type iq: xmpp.Protocol.Iq
@param iq: the received IQ
@rtype: xmpp.Protocol.Iq
@return: a ready to send IQ containing the result of the action
"""
try:
reply = iq.buildReply("result")
nodes = []
for nwfilter in self.getnwfilters():
nodes.append(xmpp.Node("filter", attrs={"name": nwfilter}))
reply.setQueryPayload(nodes)
except Exception as ex:
reply = build_error_iq(self, ex, iq, ARCHIPEL_ERROR_CODE_NETWORKS_GETNWFILTERS)
return reply
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