/usr/share/pyshared/archipelagentvmcasting/appliancedecompresser.py is in archipel-agent-vmcasting 0.6.0-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 | # -*- coding: utf-8 -*-
#
# appliancedecompresser.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 os
import shutil
import tarfile
import tempfile
import xmpp
from gzip import GzipFile as gz
from threading import Thread
from archipel.archipelLibvirtEntity import generate_mac_adress
class TNApplianceDecompresser (Thread):
def __init__(self, working_dir, disk_exts, xvm2_package_path, entity, finish_callback, error_callback, package_uuid, requester):
"""
Initialize a TNApplianceDecompresser.
@type working_dir: string
@param working_dir: the base dir where TNApplianceDecompresser will works
@type disk_exts: array
@param disk_exts: contains all the extensions that should be considered as a disks with the initial dot (ie: .gz)
@type xvm2_package_path: string
@param xvm2_package_path: path of the xvm2 file
@type entity: L{TNArchipelVirtualMachine}
@param entity: the virtual machine
@type finish_callback: function
@param finish_callback: called when decompression is done sucessfully
@type error_callback: function
@param error_callback: called when decompression has failed
@type package_uuid: string
@param package_uuid: UUID of the package
@type requester: xmpp.Protocol.JID
@param requester: the JID of the requester
"""
self.working_dir = working_dir
self.disk_extensions = disk_exts
self.xvm2_package_path = xvm2_package_path
self.entity = entity
self.finish_callback = finish_callback
self.error_callback = error_callback
self.package_uuid = package_uuid
self.requester = requester
self.install_path = entity.folder
self.description_file = None
self.disk_files = {}
self.snapshots_desc = []
Thread.__init__(self)
def run(self):
"""
Run the thread.
"""
try:
self.entity.log.info("TNApplianceDecompresser: unpacking to %s" % self.working_dir)
try:
self.entity.log.info("TNApplianceDecompresser: unpacking to %s" % self.working_dir)
self.unpack()
except Exception as ex:
raise Exception("TNApplianceDecompresser: cannot unpack because unpack() has returned exception: %s" % str(ex))
try:
self.entity.log.info("TNApplianceDecompresser: defining UUID in description file as %s" % self.entity.uuid)
self.update_description()
except Exception as ex:
raise Exception("TNApplianceDecompresser: cannot update description because update_description() has returned exception: %s" % str(ex))
try:
self.entity.log.info("TNApplianceDecompresser: installing package in %s" % self.install_path)
self.install()
except Exception as ex:
raise Exception("TNApplianceDecompresser: cannot update install because install returned exception %s" % str(ex))
self.entity.log.info("TNApplianceDecompresser: cleaning working directory %s " % self.working_dir)
self.clean()
self.entity.log.info("TNApplianceDecompresser: Defining the virtual machine")
self.entity.define(self.description_node)
# This doesn;t work. we have to wait libvirt to handle snapshot recovering.
# anyway, everything is ready, snapshots desc are stored in xvm2 packages, XML desc
# are stored into self.snapshots_desc.
# self.entity.log.info("Recovering any snapshots")
# self.recover_snapshots()
self.finish_callback()
except Exception as ex:
try:
self.clean()
except:
pass
self.error_callback(ex)
self.entity.log.error(str(ex))
def unpack(self):
"""
Unpack the given xvm2 package.
@rtype: boolean
@return: True in case of success
"""
self.package_path = self.xvm2_package_path
self.temp_path = tempfile.mkdtemp(dir=self.working_dir)
self.extract_path = os.path.join(self.temp_path, "export")
package = tarfile.open(name=self.package_path)
package.extractall(path=self.extract_path)
for aFile in os.listdir(self.extract_path):
full_path = os.path.join(self.extract_path, aFile)
self.entity.log.debug("TNApplianceDecompresser: parsing file %s" % full_path)
if os.path.splitext(full_path)[-1] == ".gz":
self.entity.log.info("Found one gziped disk: %s" % full_path)
i = open(full_path, 'rb')
o = open(full_path.replace(".gz", ""), 'w')
self._gunzip(i, o)
i.close()
o.close()
self.entity.log.info("File unziped at: %s" % full_path.replace(".gz", ""))
self.disk_files[aFile.replace(".gz", "")] = full_path.replace(".gz", "")
if os.path.splitext(full_path)[-1] in self.disk_extensions:
self.entity.log.debug("Found one disk: %s" % full_path)
self.disk_files[aFile] = full_path
if aFile == "description.xml":
self.entity.log.debug("Found description.xml file: %s" % full_path)
o = open(full_path, 'r')
self.description_file = o.read()
o.close()
# if aFile.find("snapshot-") > -1:
# self.entity.log.debug("found snapshot file : %s" % full_path)
# o = open(full_path, 'r')
# snapXML = o.read()
# o.close()
# self.snapshots_desc.append(snapXML)
return True
def update_description(self):
"""
Define the uuid to write in the description file.
@raise Exception: Exception if description file is empty
@return: True in case of success
"""
if not self.description_file:
raise Exception("Description file is empty.")
desc_string = self.description_file
xml_desc = xmpp.simplexml.NodeBuilder(data=desc_string).getDom()
name_node = xml_desc.getTag("name")
uuid_node = xml_desc.getTag("uuid")
if xml_desc.getTag("devices"):
disk_nodes = xml_desc.getTag("devices").getTags("disk")
for disk in disk_nodes:
source = disk.getTag("source")
if source:
source_file = os.path.basename(source.getAttr("file")).replace(".gz", "")
source.setAttr("file", os.path.join(self.entity.folder, source_file))
if xml_desc.getTag("devices"):
nics_nodes = xml_desc.getTag("devices").getTags("interface")
for nic in nics_nodes:
mac = nic.getTag("mac")
if mac:
mac.setAttr("address", generate_mac_adress())
else:
nic.addChild(name="mac", attrs={"address" : generate_mac_adress()})
name_node.setData(self.entity.uuid)
uuid_node.setData(self.entity.uuid)
self.description_node = xml_desc
return True
def recover_snapshots(self):
"""
Recover any snapshots.
"""
for snap in self.snapshots_desc:
try:
snap_node = xmpp.simplexml.NodeBuilder(data=snap).getDom()
#snap_node.getTag("name").setData(str(uuid.uuid1()))
snap_node.getTag("domain").getTag("uuid").setData(self.entity.uuid)
snap_str = str(snap_node).replace('xmlns="http://www.gajim.org/xmlns/undeclared" ', '')
self.entity.domain.snapshotCreateXML(snap_str, 0)
except Exception as ex:
self.entity.log.error("TNApplianceDecompresser: can't recover snapshot: %s", str(ex))
def install(self):
"""
Install a untared and uuid defined package.
@return: True in case of success
"""
if not self.description_file:
raise Exception("description file is empty")
for key, path in self.disk_files.items():
self.entity.log.debug("TNApplianceDecompresser: moving %s to %s" % (path, self.install_path))
try:
shutil.move(path, self.install_path)
except:
os.remove(self.install_path + "/" + key)
shutil.move(path, self.install_path)
f = open(self.install_path + "/current.package", "w")
f.write(self.package_uuid)
f.close()
return True
def _gunzip(self, fileobjin, fileobjout):
"""
Returns NamedTemporaryFile with unzipped content of fileobj.
@type fileobjin: File
@param fileobjin: file containing the archive
@type fileobjout: File
@param fileobjout: file where to put the unziped file
"""
source = gz(fileobj=fileobjin, mode='rb')
target = fileobjout
try:
while 1:
data=source.read(65536)
if data and len(data):
target.write(data)
else:
target.flush()
break
except Exception:
target.close()
raise
else:
return target
def clean(self):
"""
Clean the tempory path.
"""
shutil.rmtree(self.temp_path)
|