460 lines
14 KiB
Python
460 lines
14 KiB
Python
#
|
|
# 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
|
|
|
|
from virtinst import support
|
|
from virtinst import StoragePool, StorageVolume
|
|
from virtinst import util
|
|
from virtinst import Installer
|
|
from virtinst import VirtualDisk
|
|
from virtinst import urlfetcher
|
|
|
|
|
|
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 = StoragePool.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 = StoragePool(conn)
|
|
poolbuild.type = poolbuild.TYPE_DIR
|
|
poolbuild.name = name
|
|
poolbuild.target_path = path
|
|
|
|
# Explicitly don't build? since if we are creating this directory
|
|
# we probably don't have correct perms
|
|
ret = poolbuild.install(meter=meter, create=True, build=False,
|
|
autostart=True)
|
|
conn.clear_cache()
|
|
return ret
|
|
|
|
|
|
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)
|
|
xmlobj = StoragePool(conn, parsexml=destpool.XMLDesc(0))
|
|
poolpath = xmlobj.target_path
|
|
|
|
name = StorageVolume.find_free_name(basename, pool_object=destpool)
|
|
if name != basename:
|
|
logging.debug("Generated non-colliding volume name %s", name)
|
|
|
|
vol_install = VirtualDisk.build_vol_install(conn, name, destpool,
|
|
(float(size) / 1024.0 / 1024.0 / 1024.0), True)
|
|
|
|
disk = VirtualDisk(conn)
|
|
disk.path = os.path.join(poolpath, name)
|
|
disk.set_create_storage(vol_install=vol_install)
|
|
disk.validate()
|
|
|
|
disk.setup(meter=meter)
|
|
vol = disk.get_vol_object()
|
|
if not vol:
|
|
raise RuntimeError(_("Failed to lookup scratch media volume"))
|
|
|
|
try:
|
|
# Register upload
|
|
offset = 0
|
|
length = size
|
|
flags = 0
|
|
stream.upload(vol, offset, length, flags)
|
|
|
|
# Open source file
|
|
fileobj = file(src, "r")
|
|
|
|
# Start transfer
|
|
total = 0
|
|
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)
|
|
meter.update(total)
|
|
|
|
# Cleanup
|
|
stream.finish()
|
|
meter.end(size)
|
|
except:
|
|
if vol:
|
|
vol.delete(0)
|
|
raise
|
|
|
|
return vol
|
|
|
|
|
|
def _rhel4_initrd_inject(initrd, injections):
|
|
try:
|
|
file_proc = subprocess.Popen(["file", "-z", initrd],
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
if not "ext2 filesystem" in file_proc.communicate()[0]:
|
|
return False
|
|
except:
|
|
logging.exception("Failed to file command for rhel4 initrd detection")
|
|
return False
|
|
|
|
logging.debug("Is RHEL4 initrd")
|
|
|
|
# Uncompress the initrd
|
|
newinitrd = file(initrd + ".new", "wb")
|
|
gzip_proc = subprocess.Popen(["gzip", "-d", "-f", "-c", initrd],
|
|
stdout=newinitrd,
|
|
stderr=subprocess.PIPE)
|
|
gzip_proc.wait()
|
|
newinitrd.close()
|
|
|
|
debugfserr = ""
|
|
for filename in injections:
|
|
# We have an ext2 filesystem, use debugfs to inject files
|
|
cmd = ["debugfs", "-w", "-R",
|
|
"write %s %s" % (filename, os.path.basename(filename)),
|
|
newinitrd.name]
|
|
logging.debug("Copying %s to the initrd with cmd=%s", filename, cmd)
|
|
|
|
debugfs_proc = subprocess.Popen(cmd,
|
|
stdout=subprocess.PIPE,
|
|
stderr=subprocess.PIPE)
|
|
debugfs_proc.wait()
|
|
debugfserr += debugfs_proc.stderr.read() or ""
|
|
|
|
gziperr = gzip_proc.stderr.read()
|
|
if gziperr:
|
|
logging.debug("gzip stderr=%s", gziperr)
|
|
if debugfserr:
|
|
logging.debug("debugfs stderr=%s", debugfserr)
|
|
|
|
# Recompress the initrd
|
|
gzip_proc = subprocess.Popen(["gzip"],
|
|
stdin=file(newinitrd.name, "rb"),
|
|
stdout=file(initrd, "wb"),
|
|
stderr=subprocess.PIPE)
|
|
gzip_proc.wait()
|
|
gziperr = gzip_proc.stderr.read()
|
|
if gziperr:
|
|
logging.debug("gzip stderr=%s", gziperr)
|
|
os.unlink(newinitrd.name)
|
|
|
|
return True
|
|
|
|
|
|
def _perform_initrd_injections(initrd, injections, scratchdir):
|
|
"""
|
|
Insert files into the root directory of the initial ram disk
|
|
"""
|
|
if not injections:
|
|
return
|
|
|
|
if _rhel4_initrd_inject(initrd, injections):
|
|
return
|
|
|
|
tempdir = tempfile.mkdtemp(dir=scratchdir)
|
|
os.chmod(tempdir, 0775)
|
|
|
|
for filename in 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 _upload_media(conn, scratchdir, system_scratchdir,
|
|
meter, kernel, initrd):
|
|
"""
|
|
Upload kernel/initrd media to remote connection if necessary
|
|
"""
|
|
tmpvols = []
|
|
|
|
if (not conn.is_remote() and
|
|
(conn.is_session_uri() or 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, tmpvols
|
|
|
|
if not support.support_remote_url_install(conn):
|
|
logging.debug("Media upload not supported")
|
|
return kernel, initrd, tmpvols
|
|
|
|
# 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()
|
|
tmpvols.append(kvol)
|
|
|
|
ivol = _upload_file(conn, meter, pool, initrd)
|
|
newinitrd = ivol.path()
|
|
tmpvols.append(ivol)
|
|
|
|
return newkernel, newinitrd, tmpvols
|
|
|
|
|
|
|
|
class DistroInstaller(Installer):
|
|
def __init__(self, *args, **kwargs):
|
|
Installer.__init__(self, *args, **kwargs)
|
|
|
|
self.livecd = False
|
|
self._location_is_path = True
|
|
|
|
|
|
#######################
|
|
# Install prepartions #
|
|
#######################
|
|
|
|
def _prepare_local(self):
|
|
transient = True
|
|
if self.cdrom:
|
|
transient = not self.livecd
|
|
return self._make_cdrom_dev(self.location, transient=transient)
|
|
|
|
def _prepare_cdrom_url(self, guest, fetcher):
|
|
store = urlfetcher.getDistroStore(guest, fetcher)
|
|
media = store.acquireBootDisk(guest)
|
|
self._tmpfiles.append(media)
|
|
return self._make_cdrom_dev(media, transient=True)
|
|
|
|
def _prepare_kernel_url(self, guest, fetcher):
|
|
store = urlfetcher.getDistroStore(guest, fetcher)
|
|
kernel, initrd, args = store.acquireKernel(guest)
|
|
os_variant = store.get_osdict_info()
|
|
|
|
if guest.os_autodetect:
|
|
if os_variant:
|
|
logging.debug("Auto detected OS variant as: %s", os_variant)
|
|
guest.os_variant = os_variant
|
|
|
|
self._tmpfiles.append(kernel)
|
|
if initrd:
|
|
self._tmpfiles.append(initrd)
|
|
|
|
_perform_initrd_injections(initrd,
|
|
self.initrd_injections,
|
|
fetcher.scratchdir)
|
|
|
|
kernel, initrd, tmpvols = _upload_media(
|
|
guest.conn, fetcher.scratchdir,
|
|
util.get_system_scratchdir(guest.type),
|
|
fetcher.meter, kernel, initrd)
|
|
self._tmpvols += tmpvols
|
|
|
|
self._install_kernel = kernel
|
|
self._install_initrd = initrd
|
|
self._install_args = args
|
|
|
|
|
|
###########################
|
|
# Private installer impls #
|
|
###########################
|
|
|
|
def _get_bootdev(self, isinstall, guest):
|
|
persistent_cd = (self._location_is_path and
|
|
self.cdrom and
|
|
self.livecd)
|
|
|
|
if isinstall or persistent_cd:
|
|
bootdev = "cdrom"
|
|
else:
|
|
bootdev = "hd"
|
|
return bootdev
|
|
|
|
def _validate_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) http, ftp, or nfs path for an install tree
|
|
"""
|
|
is_local = not self.conn.is_remote()
|
|
if _is_url(val, is_local):
|
|
self._location_is_path = False
|
|
logging.debug("DistroInstaller location is a network source.")
|
|
return _sanitize_url(val)
|
|
|
|
try:
|
|
d = self._make_cdrom_dev(val)
|
|
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)))
|
|
|
|
self._location_is_path = True
|
|
return val
|
|
|
|
def _prepare(self, guest, meter, scratchdir):
|
|
logging.debug("Using scratchdir=%s", scratchdir)
|
|
|
|
if self.cdrom and not self.location:
|
|
# Booting from a cdrom directly allocated to the guest
|
|
return
|
|
|
|
# Test suite manually injected a boot kernel
|
|
if self._install_kernel and not self.scratchdir_required():
|
|
return
|
|
|
|
dev = None
|
|
if self._location_is_path and not os.path.isdir(self.location):
|
|
dev = self._prepare_local()
|
|
else:
|
|
fetcher = urlfetcher.fetcherForURI(self.location,
|
|
scratchdir, meter)
|
|
try:
|
|
try:
|
|
fetcher.prepareLocation()
|
|
except ValueError, e:
|
|
logging.exception("Error preparing install location")
|
|
raise ValueError(_("Invalid install location: ") + str(e))
|
|
|
|
if self.cdrom:
|
|
dev = self._prepare_cdrom_url(guest, fetcher)
|
|
else:
|
|
self._prepare_kernel_url(guest, fetcher)
|
|
finally:
|
|
fetcher.cleanupLocation()
|
|
|
|
if dev:
|
|
self.install_devices.append(dev)
|
|
|
|
|
|
|
|
##########################
|
|
# Public installer impls #
|
|
##########################
|
|
|
|
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 check_location(self, guest):
|
|
if self._location_is_path:
|
|
# We already mostly validated this
|
|
return True
|
|
|
|
# This will throw an error for us
|
|
urlfetcher.detectMediaDistro(guest, self.location)
|
|
return True
|
|
|
|
def detect_distro(self, guest):
|
|
try:
|
|
return urlfetcher.detectMediaDistro(guest, self.location)
|
|
except:
|
|
logging.exception("Error attempting to detect distro.")
|
|
return None
|