<sicurezza@virtualsolution.net>
2006-May-12 18:28 UTC
[Fedora-xen] Problem starting Xen guest From SSH - Fedora5
Hi all,
When i start xen guest from console all is OK but
i have this error if i try to start from SSH:
[root@fedora bin]# /usr/sbin/xm create -c virtual7
Using config file "/etc/xen/virtual7".
Traceback (most recent call last):
File "/usr/bin/pygrub", line 258, in ?
curses.wrapper(run_main)
File "/usr/lib/python2.4/curses/wrapper.py", line 44, in wrapper
return func(stdscr, *args, **kwds)
File "/usr/bin/pygrub", line 214, in run_main
sel = main(cf)
File "/usr/bin/pygrub", line 162, in main
(stdscr, win) = draw_window()
File "/usr/bin/pygrub", line 33, in draw_window
curses.use_default_colors()
_curses.error: use_default_colors() returned ERR
Error: Boot loader didn''t return any data!
Any Ideas ?
Thanks
This is my envirorment:
OS: Fedora core 5
XEN version:
Name : xen Relocations: (not relocatable)
Version : 3.0.2 Vendor: Red Hat, Inc.
Release : 0.FC5.1 Build Date: gio 04 mag 2006 17:27:42
CEST
Install Date: ven 12 mag 2006 18:45:01 CEST Build Host:
hs20-bc1-5.build.redhat.com
Group : Development/Libraries Source RPM:
xen-3.0.2-0.FC5.1.src.rpm
Size : 3903916 License: GPL
Signature : DSA/SHA1, gio 04 mag 2006 19:03:45 CEST, Key ID da84cbd430c9ecf8
Packager : Red Hat, Inc. <http://bugzilla.redhat.com/bugzilla>
URL : http://www.cl.cam.ac.uk/Research/SRG/netos/xen/index.html
Kernel version:
kernel-xen0-2.6.16-1.2096_FC5.i686.rpm
Kernel guest version: 2.6.15-1.2054_FC5xenU
---------------------------------------------------------------------------------
[root@fedora bin]# cat /usr/bin/pygrub
#!/usr/bin/python
#
# pygrub - simple python-based bootloader for Xen
#
# Copyright 2005 Red Hat, Inc.
# Jeremy Katz <katzj@redhat.com>
#
# This software may be freely redistributed under the terms of the GNU
# general public license.
#
# 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., 675 Mass Ave, Cambridge, MA 02139, USA.
#
import os, sys, string, struct, tempfile
import logging
import curses, _curses, curses.wrapper
import getopt
sys.path = [ ''/usr/lib/python'' ] + sys.path
import grub.GrubConf
import grub.fsys
PYGRUB_VER = 0.3
def draw_window():
stdscr = curses.initscr()
if hasattr(curses, ''use_default_colors''):
curses.use_default_colors()
try:
curses.curs_set(0)
except _curses.error:
pass
stdscr.addstr(1, 4, "pyGRUB version %s" %(PYGRUB_VER,))
win = curses.newwin(10, 74, 2, 1)
win.box()
win.refresh()
stdscr.addstr(12, 5, "Use the U and D keys to select which entry is
highlighted.")
stdscr.addstr(13, 5, "Press enter to boot the selected OS.
''e'' to edit the")
stdscr.addstr(14, 5, "commands before booting, ''a'' to
modify the kernel arguments ")
stdscr.addstr(15, 5, "before booting, or ''c'' for a
command line.")
stdscr.addch(12, 13, curses.ACS_UARROW)
stdscr.addch(12, 19, curses.ACS_DARROW)
(y, x) = stdscr.getmaxyx()
stdscr.move(y - 1, x - 1)
stdscr.refresh()
return (stdscr, win)
def fill_entries(win, cfg, selected):
y = 0
for i in cfg.images:
if (0, y) > win.getmaxyx():
break
if y == selected:
attr = curses.A_REVERSE
else:
attr = 0
win.addstr(y + 1, 2, i.title.ljust(70), attr)
y += 1
win.refresh()
def select(win, line):
win.attron(curses.A_REVERSE)
win.redrawln(line + 1, 1)
win.refresh()
def is_disk_image(file):
fd = os.open(file, os.O_RDONLY)
buf = os.read(fd, 512)
os.close(fd)
if len(buf) >= 512 and struct.unpack("H", buf[0x1fe: 0x200]) ==
(0xaa55,):
return True
return False
SECTOR_SIZE=512
def get_active_offset(file):
"""Find the offset for the start of the first active
partition in the
disk image file."""
fd = os.open(file, os.O_RDONLY)
buf = os.read(fd, 512)
for poff in (446, 462, 478, 494): # partition offsets
# active partition has 0x80 as the first byte
if struct.unpack("<c", buf[poff:poff+1]) ==
(''\x80'',):
return struct.unpack("<L", buf[poff+8:poff+12])[0] *
SECTOR_SIZE
return -1
def get_config(fn, isconfig = False):
if not os.access(fn, os.R_OK):
raise RuntimeError, "Unable to access %s" %(fn,)
cf = grub.GrubConf.GrubConfigFile()
if isconfig:
# set the config file and parse it
cf.filename = fn
cf.parse()
return cf
offset = 0
if is_disk_image(fn):
offset = get_active_offset(fn)
if offset == -1:
raise RuntimeError, "Unable to find active partition on
disk"
# open the image and read the grub config
fs = None
for fstype in grub.fsys.fstypes.values():
if fstype.sniff_magic(fn, offset):
fs = fstype.open_fs(fn, offset)
break
if fs is not None:
grubfile = None
for f in ("/boot/grub/menu.lst",
"/boot/grub/grub.conf",
"/grub/menu.lst", "/grub/grub.conf"):
if fs.file_exist(f):
grubfile = f
break
if grubfile is None:
raise RuntimeError, "we couldn''t find
/boot/grub{menu.lst,grub.conf} " + \
"in the image provided. halt!"
f = fs.open_file(grubfile)
buf = f.read()
f.close()
fs.close()
# then parse the grub config
cf.parse(buf)
else:
raise RuntimeError, "Unable to read filesystem"
return cf
def get_entry_idx(cf, entry):
# first, see if the given entry is numeric
try:
idx = string.atoi(entry)
return idx
except ValueError:
pass
# it''s not, now check the labels for a match
for i in range(len(cf.images)):
if entry == cf.images[i].title:
return i
return None
def main(cf = None):
mytime = 0
timeout = int(cf.timeout)
(stdscr, win) = draw_window()
stdscr.timeout(1000)
selected = cf.default
while (timeout == -1 or mytime < int(timeout)):
if timeout != -1 and mytime != -1:
stdscr.addstr(20, 5, "Will boot selected entry in %2d
seconds"
%(int(timeout) - mytime))
else:
stdscr.addstr(20, 5, " " * 80)
fill_entries(win, cf, selected)
c = stdscr.getch()
if mytime != -1:
mytime += 1
# if c == ord(''q''):
# selected = -1
# break
if c == ord(''c''):
# FIXME: needs to go to command line mode
continue
elif c == ord(''a''):
# FIXME: needs to go to append mode
continue
elif c == ord(''e''):
# FIXME: needs to go to edit mode
continue
elif c in (curses.KEY_ENTER, ord(''\n''),
ord(''\r'')):
break
elif c == curses.KEY_UP:
mytime = -1
selected -= 1
elif c == curses.KEY_DOWN:
mytime = -1
selected += 1
else:
pass
# bound at the top and bottom
if selected < 0:
selected = 0
elif selected >= len(cf.images):
selected = len(cf.images) - 1
if selected >= 0:
return selected
if __name__ == "__main__":
sel = None
def run_main(scr, *args):
global sel
sel = main(cf)
def usage():
print >> sys.stderr, "Usage: %s [-q|--quiet] [--output=]
[--entry=] <image>" %(sys.argv[0],)
try:
opts, args = getopt.gnu_getopt(sys.argv[1:], ''qh::'',
["quiet", "help",
"output=", "entry=",
"isconfig"])
except getopt.GetoptError:
usage()
sys.exit(1)
if len(args) < 1:
usage()
sys.exit(1)
file = args[0]
output = None
entry = None
interactive = True
isconfig = False
for o, a in opts:
if o in ("-q", "--quiet"):
interactive = False
elif o in ("-h", "--help"):
usage()
sys.exit()
elif o in ("--output",):
output = a
elif o in ("--entry",):
entry = a
# specifying the entry to boot implies non-interactive
interactive = False
elif o in ("--isconfig",):
isconfig = True
if output is None or output == "-":
fd = sys.stdout.fileno()
else:
fd = os.open(output, os.O_WRONLY)
cf = get_config(file, isconfig)
if interactive:
curses.wrapper(run_main)
else:
sel = cf.default
# set the entry to boot as requested
if entry is not None:
idx = get_entry_idx(cf, entry)
if idx is not None and idx > 0 and idx < len(cf.images):
sel = idx
img = cf.images[sel]
print "Going to boot %s" %(img.title)
print " kernel: %s" %(img.kernel[1],)
if img.initrd:
print " initrd: %s" %(img.initrd[1],)
offset = 0
if is_disk_image(file):
offset = get_active_offset(file)
if offset == -1:
raise RuntimeError, "Unable to find active partition on
disk"
# read the kernel and initrd onto the hostfs
fs = None
for fstype in grub.fsys.fstypes.values():
if fstype.sniff_magic(file, offset):
fs = fstype.open_fs(file, offset)
break
if fs is None:
raise RuntimeError, "Unable to open filesystem"
kernel = fs.open_file(img.kernel[1],).read()
(tfd, fn) = tempfile.mkstemp(prefix="vmlinuz.",
dir="/var/lib/xen")
os.write(tfd, kernel)
os.close(tfd)
sxp = "linux (kernel %s)" %(fn,)
if img.initrd:
initrd = fs.open_file(img.initrd[1],).read()
(tfd, fn) = tempfile.mkstemp(prefix="initrd.",
dir="/var/lib/xen")
os.write(tfd, initrd)
os.close(tfd)
sxp += "(ramdisk %s)" %(fn,)
else:
initrd = None
sxp += "(args ''%s'')" %(img.args,)
sys.stdout.flush()
os.write(fd, sxp)
---------------------------------------------------------------------------------