/usr/lib/python2.7/dist-packages/virtinst/DistroInstaller.py is in virtinst 0.600.4-3ubuntu2.
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# Copyright 2006-2009 Red Hat, Inc.
# Daniel P. Berrange <berrange@redhat.com>
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation; either version 2 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA 02110-1301 USA.
import logging
import os
import shutil
import subprocess
import tempfile
import urlgrabber
import Storage
import support
import _util
import Installer
from VirtualDisk import VirtualDisk
from User import User
import OSDistro
from virtinst import _gettext as _
def _is_url(url, is_local):
"""
Check if passed string is a (pseudo) valid http, ftp, or nfs url.
"""
if is_local and os.path.exists(url):
if os.path.isdir(url):
return True
else:
return False
return (url.startswith("http://") or url.startswith("ftp://") or
url.startswith("nfs:"))
def _sanitize_url(url):
"""
Do nothing for http or ftp, but make sure nfs is in the expected format
"""
if url.startswith("nfs://"):
# Convert RFC compliant NFS nfs://server/path/to/distro
# to what mount/anaconda expect nfs:server:/path/to/distro
# and carry the latter form around internally
url = "nfs:" + url[6:]
# If we need to add the : after the server
index = url.find("/", 4)
if index == -1:
raise ValueError(_("Invalid NFS format: No path specified."))
if url[index - 1] != ":":
url = url[:index] + ":" + url[index:]
return url
def _build_pool(conn, meter, path):
pool = _util.lookup_pool_by_path(conn, path)
if pool:
logging.debug("Existing pool '%s' found for %s", pool.name(), path)
pool.refresh(0)
return pool
name = _util.generate_name("boot-scratch",
conn.storagePoolLookupByName)
logging.debug("Building storage pool: path=%s name=%s", path, name)
poolbuild = Storage.DirectoryPool(conn=conn, name=name,
target_path=path)
# Explicitly don't build? since if we are creating this directory
# we probably don't have correct perms
return poolbuild.install(meter=meter, create=True, build=False,
autostart=True)
def _upload_file(conn, meter, destpool, src):
# Build stream object
stream = conn.newStream(0)
def safe_send(data):
while True:
ret = stream.send(data)
if ret == 0 or ret == len(data):
break
data = data[ret:]
if meter is None:
meter = urlgrabber.progress.BaseMeter()
# Build placeholder volume
size = os.path.getsize(src)
basename = os.path.basename(src)
poolpath = _util.get_xml_path(destpool.XMLDesc(0), "/pool/target/path")
name = Storage.StorageVolume.find_free_name(basename,
pool_object=destpool)
if name != basename:
logging.debug("Generated non-colliding volume name %s", name)
disk = VirtualDisk(conn=conn,
path=os.path.join(poolpath, name),
sizebytes=size,
sparse=True)
disk.setup_dev(meter=meter)
vol = disk.vol_object
if not vol:
raise RuntimeError(_("Failed to lookup scratch media volume"))
try:
# Register upload
offset = 0
length = size
flags = 0
vol.upload(stream, offset, length, flags)
# Open source file
fileobj = file(src, "r")
# Start transfer
total = 0
if meter:
meter.start(size=size,
text=_("Transferring %s") % os.path.basename(src))
while True:
#blocksize = (1024 ** 2)
blocksize = 1024
data = fileobj.read(blocksize)
if not data:
break
safe_send(data)
total += len(data)
if meter:
meter.update(total)
# Cleanup
stream.finish()
if meter:
meter.end(size)
except:
if vol:
vol.delete(0)
raise
return vol
class DistroInstaller(Installer.Installer):
def __init__(self, type="xen", location=None, boot=None,
extraargs=None, os_type=None,
conn=None, caps=None):
Installer.Installer.__init__(self, type, location, boot, extraargs,
os_type, conn=conn, caps=caps)
self._livecd = False
# True == location is a filesystem path
# False == location is a url
self._location_is_path = True
# DistroInstaller specific methods/overwrites
def _get_livecd(self):
return self._livecd
def _set_livecd(self, val):
self._livecd = bool(val)
livecd = property(_get_livecd, _set_livecd)
def get_location(self):
return self._location
def set_location(self, val):
"""
Valid values for location:
1) it can be a local file (ex. boot.iso), directory (ex. distro
tree) or physical device (ex. cdrom media)
2) tuple of the form (poolname, volname) pointing to a file or
device which will set location as that path
3) http, ftp, or nfs path for an install tree
"""
is_tuple = False
validated = True
self._location_is_path = True
is_local = (not self.conn or not self.is_remote())
# Basic validation
if type(val) is not str and (type(val) is not tuple and len(val) != 2):
raise ValueError(_("Invalid 'location' type %s." % type(val)))
if type(val) is tuple and len(val) == 2:
logging.debug("DistroInstaller location is a (poolname, volname)"
" tuple")
if not self.conn:
raise ValueError(_("'conn' must be specified if 'location' is"
" a storage tuple."))
is_tuple = True
elif _is_url(val, is_local):
val = _sanitize_url(val)
self._location_is_path = False
logging.debug("DistroInstaller location is a network source.")
elif os.path.exists(os.path.abspath(val)) and is_local:
val = os.path.abspath(val)
logging.debug("DistroInstaller location is a local "
"file/path: %s", val)
else:
# Didn't determine anything about the location
validated = False
if self._location_is_path or (validated == False and self.conn and
_util.is_storage_capable(self.conn)):
# If user passed a storage tuple, OR
# We couldn't determine the location type and a storage capable
# connection was passed:
# Pass the parameters off to VirtualDisk to validate, and pull
# out the path
stuple = (is_tuple and val) or None
path = (not is_tuple and val) or None
try:
d = VirtualDisk(path=path,
device=VirtualDisk.DEVICE_CDROM,
transient=True,
readOnly=True,
conn=self.conn,
volName=stuple)
val = d.path
except:
logging.debug("Error validating install location",
exc_info=True)
raise ValueError(_("Checking installer location failed: "
"Could not find media '%s'." % str(val)))
elif not validated:
raise ValueError(_("Install media location must be an NFS, HTTP "
"or FTP network install source, or an existing "
"file/device"))
if (not self._location_is_path and val.startswith("nfs:") and not
User.current().has_priv(User.PRIV_NFS_MOUNT,
(self.conn and self.get_uri()))):
raise ValueError(_('Privilege is required for NFS installations'))
self._location = val
location = property(get_location, set_location)
# Private helper methods
def _prepare_cdrom(self, guest, meter):
transient = not self.livecd
if not self._location_is_path:
# Xen needs a boot.iso if its a http://, ftp://, or nfs: url
(store_ignore, os_type_ignore, os_variant_ignore, media) = \
OSDistro.acquireBootDisk(guest, self.location, meter,
self.scratchdir)
cdrom = media
self._tmpfiles.append(cdrom)
transient = True
else:
cdrom = self.location
disk = VirtualDisk(path=cdrom,
conn=guest.conn,
device=VirtualDisk.DEVICE_CDROM,
readOnly=True,
transient=transient)
self.install_devices.append(disk)
def _perform_initrd_injections(self, initrd):
"""
Insert files into the root directory of the initial ram disk
"""
tempdir = tempfile.mkdtemp(dir=self.scratchdir)
os.chmod(tempdir, 0775)
for filename in self._initrd_injections:
logging.debug("Copying %s to the initrd.", filename)
shutil.copy(filename, tempdir)
logging.debug("Appending to the initrd.")
find_proc = subprocess.Popen(['find', '.', '-print0'],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=tempdir)
cpio_proc = subprocess.Popen(['cpio', '-o', '--null', '-Hnewc', '--quiet'],
stdin=find_proc.stdout,
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
cwd=tempdir)
f = open(initrd, 'ab')
gzip_proc = subprocess.Popen(['gzip'], stdin=cpio_proc.stdout,
stdout=f, stderr=subprocess.PIPE)
cpio_proc.wait()
find_proc.wait()
gzip_proc.wait()
f.close()
shutil.rmtree(tempdir)
finderr = find_proc.stderr.read()
cpioerr = cpio_proc.stderr.read()
gziperr = gzip_proc.stderr.read()
if finderr:
logging.debug("find stderr=%s", finderr)
if cpioerr:
logging.debug("cpio stderr=%s", cpioerr)
if gziperr:
logging.debug("gzip stderr=%s", gziperr)
def support_remote_url_install(self):
if not self.conn:
return False
if hasattr(self.conn, "_virtinst__fake_conn"):
return False
return support.check_stream_support(self.conn,
support.SUPPORT_STREAM_UPLOAD)
def _upload_media(self, guest, meter, kernel, initrd):
conn = guest.conn
system_scratchdir = self._get_system_scratchdir()
if (not guest.is_remote() and
(self.is_session_uri() or self.scratchdir == system_scratchdir)):
# We have access to system scratchdir, don't jump through hoops
logging.debug("Have access to preferred scratchdir so"
" nothing to upload")
return kernel, initrd
if not self.support_remote_url_install():
logging.debug("Media upload not supported")
return kernel, initrd
# Build pool
logging.debug("Uploading kernel/initrd media")
pool = _build_pool(conn, meter, system_scratchdir)
kvol = _upload_file(conn, meter, pool, kernel)
newkernel = kvol.path()
self._tmpvols.append(kvol)
ivol = _upload_file(conn, meter, pool, initrd)
newinitrd = ivol.path()
self._tmpvols.append(ivol)
return newkernel, newinitrd
def _prepare_kernel_and_initrd(self, guest, meter):
disk = None
# If installing off a local path, map it through to a virtual CD/disk
if (self.location is not None and
self._location_is_path and
not os.path.isdir(self.location)):
device = VirtualDisk.DEVICE_CDROM
if (self.is_xenpv() and
not guest._lookup_osdict_key('pv_cdrom_install')):
device = VirtualDisk.DEVICE_DISK
disk = VirtualDisk(conn=guest.conn,
device=device,
path=self.location,
readOnly=True,
transient=True)
# Make sure we always fetch kernel here if required
if self._install_bootconfig.kernel and not self.scratchdir_required():
return disk
# Need to fetch the kernel & initrd from a remote site, or
# out of a loopback mounted disk image/device
ignore, os_type, os_variant, media = OSDistro.acquireKernel(guest,
self.location, meter,
self.scratchdir,
self.os_type)
(kernelfn, initrdfn, args) = media
if guest.get_os_autodetect():
if os_type:
logging.debug("Auto detected OS type as: %s", os_type)
guest.os_type = os_type
if (os_variant and guest.os_type == os_type):
logging.debug("Auto detected OS variant as: %s", os_variant)
guest.os_variant = os_variant
self._tmpfiles.append(kernelfn)
if initrdfn:
self._tmpfiles.append(initrdfn)
if self._initrd_injections:
self._perform_initrd_injections(initrdfn)
# If required, upload media to an accessible guest location
kernelfn, initrdfn = self._upload_media(guest, meter,
kernelfn, initrdfn)
self._install_bootconfig.kernel = kernelfn
self._install_bootconfig.initrd = initrdfn
self._install_bootconfig.kernel_args = args
return disk
def _persistent_cd(self):
return (self._location_is_path and self.cdrom and self.livecd)
def _get_bootdev(self, isinstall, guest):
if isinstall or self._persistent_cd():
bootdev = self.bootconfig.BOOT_DEVICE_CDROM
else:
bootdev = self.bootconfig.BOOT_DEVICE_HARDDISK
return bootdev
# General Installer methods
def scratchdir_required(self):
if not self.location:
return False
is_url = not self._location_is_path
mount_dvd = self._location_is_path and not self.cdrom
return bool(is_url or mount_dvd)
def prepare(self, guest, meter):
self.cleanup()
dev = None
if self.cdrom:
if self.location:
dev = self._prepare_cdrom(guest, meter)
else:
# Booting from a cdrom directly allocated to the guest
pass
else:
dev = self._prepare_kernel_and_initrd(guest, meter)
if dev:
self.install_devices.append(dev)
def check_location(self):
if self._location_is_path:
# We already mostly validated this
return True
else:
# This will throw an error for us
OSDistro.detectMediaDistro(location=self.location, arch=self.arch)
return True
def detect_distro(self):
try:
dist_info = OSDistro.detectMediaDistro(location=self.location,
arch=self.arch)
except:
logging.exception("Error attempting to detect distro.")
return (None, None)
# detectMediaDistro should only return valid values
dtype, dvariant = dist_info
return (dtype, dvariant)
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