# # Copyright 2006-2009 Red Hat, Inc. # Daniel P. Berrange # # 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(destpool, basename) 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