Bug 305401 – Attempting to connect to hpyervisor via virt-manager, libvirt fails to access any hypervisor, (qemu, qemu-kvm, xen) with error, no hypervisor driver available; virt-manager-0.8.2 and libvirt-0.7.5

• Status: RESOLVED DUPLICATE of bug 305407
• Product: Gentoo Linux

[Description Ian Delaney (RETIRED) 2010-02-16 15:52:12 UTC]

Freshly emerged instance of virt-manager and libvirt, the hypervisor cannot be connected.  Both these report error, no hypervisor driver available for qemu/qemu-kvm/xen.  The sub-program virsh presents with the same deficit.

idella@gentoo64 ~ $ sudo virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # connect qemu:///
error: Failed to connect to the hypervisor
error: no hypervisor driver available for qemu:///

idella@gentoo64 ~ $ sudo virt-manager

yields the full message when attempting to connect via the listed localhost/qemu///

no hypervisor driver available for qemu:///system


gentoo64 idella # virt-manager

yields

Error starting Virtual Machine Manager: Failed to contact configuration server; some possible causes are that you need to enable TCP/IP networking for ORBit, or you have stale NFS locks due to a system crash. See http://projects.gnome.org/gconf/ for information. (Details -  1: Failed to get connection to session: Did not receive a reply. Possible causes include: the remote application did not send a reply, the message bus security policy blocked the reply, the reply timeout expired, or the network connection was broken.)

Now, some helpful debugging.  To prove this is a flawed package, 
gentoo64 / # gdb --args libvirtd

warning: Can not parse XML syscalls information; XML support was disabled at compile time.                                                                        
GNU gdb (Gentoo 7.0.1 p1) 7.0.1                                                  
Copyright (C) 2009 Free Software Foundation, Inc.                                
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>    
This is free software: you are free to change and redistribute it.               
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"       
and "show warranty" for details.                                                 
This GDB was configured as "i686-pc-linux-gnu".                                  
For bug reporting instructions, please see:                                      
<http://bugs.gentoo.org/>...                                                     
Reading symbols from /usr/sbin/libvirtd...(no debugging symbols found)...done.    

Problem !.  Can't parse XML syscalls.  Package was compiled with all required USE flags plus xml.,also unmerged and re-emerged with -xml, same output.

and

(gdb) run                                                                        
Starting program: /usr/sbin/libvirtd
[Thread debugging using libthread_db enabled]
[New Thread 0xf79d0b70 (LWP 25817)]
[New Thread 0xf71cfb70 (LWP 25818)]
[New Thread 0xf69ceb70 (LWP 25819)]
[New Thread 0xf61cdb70 (LWP 25820)]
[New Thread 0xf59ccb70 (LWP 25821)]
[New Thread 0xf51cbb70 (LWP 25823)]
06:42:05.960: error : virRun:847 : internal error '/sbin/brctl stp virbr0 on' exited with non-zero status 1 and signal 0: set stp status failed: Operation not supported

06:42:05.990: error : udevSetupSystemDev:1409 : Failed to get udev device for syspath '/sys/devices/virtual/dmi/id'

06:42:05.990: error : virStateInitialize:890 : Initialization of (null) state driver failed

Program received signal SIGSEGV, Segmentation fault.
[Switching to Thread 0xf79d0b70 (LWP 25817)]
0x08090ff9 in ?? ()
(gdb) bt
#0  0x08090ff9 in ?? ()
#1  0x08056126 in ?? ()
#2  0x08057f39 in ?? ()
#3  0x08058213 in ?? ()
#4  0xf7b5d6c5 in start_thread () from /lib/libpthread.so.0
#5  0xf7adea0e in clone () from /lib/libc.so.6

I've got the same result on a gentoo 32 and this gentoo amd_64. 

gentoo64 / # gdb --args virsh -c qemu:///

warning: Can not parse XML syscalls information; XML support was disabled at compile time.
GNU gdb (Gentoo 7.0.1 p1) 7.0.1
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "i686-pc-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>...
Reading symbols from /usr/bin/virsh...(no debugging symbols found)...done.
(gdb) run
Starting program: /usr/bin/virsh -c qemu:///
[Thread debugging using libthread_db enabled]
error: unable to connect to '/var/run/libvirt/libvirt-sock': Connection refused
error: failed to connect to the hypervisor

Program exited with code 01.

gentoo64 / # emerge --info
--- Invalid atom in /etc/portage/package.unmask: media-gfx/iscan x86
Portage 2.1.7.16 (default/linux/x86/10.0/desktop, gcc-4.3.4, glibc-2.11-r1, 2.6.30-gentoo-r8AMD64 x86_64)                                                         
=================================================================                
System uname: Linux-2.6.30-gentoo-r8AMD64-x86_64-Intel-R-_Core-TM-2_Duo_CPU_E6550_@_2.33GHz-with-gentoo-2.0.1                                                     
Timestamp of tree: Wed, 20 Jan 2010 00:15:02 +0000                               
app-shells/bash:     4.0_p35                                                     
dev-java/java-config: 2.1.10                                                     
dev-lang/python:     2.6.4, 3.1.1-r1                                             
dev-util/cmake:      2.8.0                                                       
sys-apps/baselayout: 2.0.1                                                       
sys-apps/openrc:     0.6.0                                                       
sys-apps/sandbox:    2.2                                                         
sys-devel/autoconf:  2.13, 2.65                                                  
sys-devel/automake:  1.8.5-r3, 1.9.6-r2, 1.10.3, 1.11.1                          
sys-devel/binutils:  2.20                                                        
sys-devel/gcc-config: 1.4.1                                                      
sys-devel/libtool:   2.2.6b                                                      
virtual/os-headers:  2.6.30-r1                                                   
ACCEPT_KEYWORDS="x86 ~x86"                                                       
ACCEPT_LICENSE="* -@EULA dlj-1.1"                                                
CBUILD="i686-pc-linux-gnu"                                                       
CFLAGS="-march=core2 -fomit-frame-pointer -pipe -O2 -mno-tls-direct-seg-refs"    
CHOST="i686-pc-linux-gnu"                                                        
CONFIG_PROTECT="/etc /usr/share/X11/xkb /usr/share/config"                       
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/ /etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/splash /etc/terminfo"                                                                          
CXXFLAGS="-march=core2 -fomit-frame-pointer -pipe -O2 -mno-tls-direct-seg-refs"  
DISTDIR="/mnt/images/genny/distfiles"                                            
FEATURES="assume-digests buildpkg distlocks fixpackages news parallel-fetch protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch"          
GENTOO_MIRRORS="ftp://ftp.swin.edu.au/gentoo/ ftp://mirror.pacific.net.au/linux/Gentoo ftp://mirror.isp.net.au/pub/gentoo/  http://mirror.isp.net.au/pub/gentoo/ http://mirror.averse.net/pub/gentoo/"                                             
LDFLAGS="-Wl,-O1"                                                                
MAKEOPTS="-j2"                                                                   
PKGDIR="/usr/portage/packages"                                                   
PORTAGE_CONFIGROOT="/"                                                           
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress --force --whole-file --delete --stats --timeout=180 --exclude=/distfiles --exclude=/local --exclude=/packages"                                                     
PORTAGE_TMPDIR="/var/tmp"                                                        
PORTDIR="/usr/portage"                                                           
SYNC="rsync://rsync.au.gentoo.org/gentoo-portage"                                
USE="(-altivec) (-aqua) (-fixed-point) (-gallium) (-hardened) (-kdeprefix) (-libffi) (-multilib) (-n32) (-n64) (-ps3) (-selinux) (wide-unicode) X a52 aac acl acpi aio alsa apm armeb arts audiofile avi bash-completion berkdb bluetooth bmp bzip2 cairo cdparanoia cdr cli client%* consolekit corefonts cracklib cris crypt ctype cups cxx dba dbmaker dbus dga dri dts dv dvd dvdr dvdread eds emboss encode esd ethereal evo extras fam fbcon ffmpeg fftw fftw* firefox flac fortran ftp gdbm gif gnome gnutls gphoto gpm gstreamer gtk gtk%* gtk2 hal handbook i386 iconv imagemagick inifile java jpeg kde ladcca ldap libg++ libvirtd lm_sensors lxc mad mbox microblaze mikmod mime mips64 mips64el mipsel mmap mng modules mono mozilla mp3 mp4 mpeg msn mudflap mysql ncurses netapi network nls nptl nptlonly ogg openal opengl openmp oss pam pcre pdf perl png png%* pnp posix ppc64abi32 ppcemb ppds pppd python qdbm qt qt3support qt4 quicktime readline reflection ruby samba scanner sdl semantic-desktop server%* session sh4 sh4eb shared slp smbclient sndfile sockets source sparc32plus sparc64 spell spl sse sse2 ssl startup-notification svg svga sysfs tcpd theora threads thunar tiff truetype udev udev%* urandom usb v4l videos vorbis websockets wifi win32codecs x264 x86 x86_64 xcb* xine xinerama xml xml2 xorg xulrunner xv xvid zlib" ALSA_CARDS="snd_hda_intel" ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter file_cache filter headers include info log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling status unique_id userdir usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 mtxorb ncurses text" RUBY_TARGETS="ruby18" USERLAND="GNU" VIDEO_CARDS="fbdev i810 nv nvidia tdfx trident vesa vga"



Reproducible: Always

Steps to Reproduce:
1.emerge virt-manager libvirt (all flags included)
2.Invoke virt-manager, invoke virsh, attempt to connect to a hypervisor.
sudo virt-manager,  or sudo virt-manager -c qemu:///
sudo virsh -c qemu:///   (without sudo, permission refused, which should also not happen since permission levels for use have been set.
3. No more.  deficit done

Actual Results:  
As previously stated, perhaps that goes here. Neither libvirt nor virt-manager can connect to the hypervisor (driver). Fails to connect.

Expected Results:  
To connect to hypervisor via virt-manager or via virsh.
e.g.  sudo virsh -c qemu:///system,
sudo virt-manager -c qemu:///

It can connect to an added driver, test:///default.
Once connected, virt-manager's installer also fails a second test.
One selecting CDrom install, it can't proceed past that wizzard window.
Once selecting a .iso image, it then begins an install, but as it does in debian distros, fails to connect to the virt-manager vnc console, error Console not active for guest.  All in all, completely unusable.

[Comment 1 Ian Delaney (RETIRED) 2010-02-16 16:03:09 UTC]

gentoo64 / # emerge --info
--- Invalid atom in /etc/portage/package.unmask: media-gfx/iscan x86
Portage 2.1.7.16 (default/linux/x86/10.0/desktop, gcc-4.3.4, glibc-2.11-r1,
2.6.30-gentoo-r8AMD64 x86_64)                                                   
=================================================================               
System uname:
Linux-2.6.30-gentoo-r8AMD64-x86_64-Intel-R-_Core-TM-2_Duo_CPU_E6550_@_2.33GHz-with-gentoo-2.0.1 
Timestamp of tree: Wed, 20 Jan 2010 00:15:02 +0000                              
app-shells/bash:     4.0_p35                                                    
dev-java/java-config: 2.1.10                                                    
dev-lang/python:     2.6.4, 3.1.1-r1                                            
dev-util/cmake:      2.8.0                                                      
sys-apps/baselayout: 2.0.1                                                      
sys-apps/openrc:     0.6.0                                                      
sys-apps/sandbox:    2.2                                                        
sys-devel/autoconf:  2.13, 2.65                                                 
sys-devel/automake:  1.8.5-r3, 1.9.6-r2, 1.10.3, 1.11.1                         
sys-devel/binutils:  2.20                                                       
sys-devel/gcc-config: 1.4.1                                                     
sys-devel/libtool:   2.2.6b                                                     
virtual/os-headers:  2.6.30-r1                                                  
ACCEPT_KEYWORDS="x86 ~x86"                                                      
ACCEPT_LICENSE="* -@EULA dlj-1.1"                                               
CBUILD="i686-pc-linux-gnu"                                                      
CFLAGS="-march=core2 -fomit-frame-pointer -pipe -O2 -mno-tls-direct-seg-refs"   
CHOST="i686-pc-linux-gnu"                                                       
CONFIG_PROTECT="/etc /usr/share/X11/xkb /usr/share/config"                      
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/env.d/java/
/etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/sandbox.d /etc/splash
/etc/terminfo"                                                                  
CXXFLAGS="-march=core2 -fomit-frame-pointer -pipe -O2 -mno-tls-direct-seg-refs" 
DISTDIR="/mnt/images/genny/distfiles"                                           
FEATURES="assume-digests buildpkg distlocks fixpackages news parallel-fetch
protect-owned sandbox sfperms strict unmerge-logs unmerge-orphans userfetch"    
GENTOO_MIRRORS="ftp://ftp.swin.edu.au/gentoo/
ftp://mirror.pacific.net.au/linux/Gentoo ftp://mirror.isp.net.au/pub/gentoo/ 
http://mirror.isp.net.au/pub/gentoo/ http://mirror.averse.net/pub/gentoo/"      
LDFLAGS="-Wl,-O1"                                                               
MAKEOPTS="-j2"                                                                  
PKGDIR="/usr/portage/packages"                                                  
PORTAGE_CONFIGROOT="/"                                                          
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --stats --timeout=180 --exclude=/distfiles
--exclude=/local --exclude=/packages"                                           
PORTAGE_TMPDIR="/var/tmp"                                                       
PORTDIR="/usr/portage"                                                          
SYNC="rsync://rsync.au.gentoo.org/gentoo-portage"                               
USE="(-altivec) (-aqua) (-fixed-point) (-gallium) (-hardened) (-kdeprefix)
(-libffi) (-multilib) (-n32) (-n64) (-ps3) (-selinux) (wide-unicode) X a52 aac
acl acpi aio alsa apm armeb arts audiofile avi bash-completion berkdb bluetooth
bmp bzip2 cairo cdparanoia cdr cli client%* consolekit corefonts cracklib cris
crypt ctype cups cxx dba dbmaker dbus dga dri dts dv dvd dvdr dvdread eds
emboss encode esd ethereal evo extras fam fbcon ffmpeg fftw fftw* firefox flac
fortran ftp gdbm gif gnome gnutls gphoto gpm gstreamer gtk gtk%* gtk2 hal
handbook i386 iconv imagemagick inifile java jpeg kde ladcca ldap libg++
libvirtd lm_sensors lxc mad mbox microblaze mikmod mime mips64 mips64el mipsel
mmap mng modules mono mozilla mp3 mp4 mpeg msn mudflap mysql ncurses netapi
network nls nptl nptlonly ogg openal opengl openmp oss pam pcre pdf perl png
png%* pnp posix ppc64abi32 ppcemb ppds pppd python qdbm qt qt3support qt4
quicktime readline reflection ruby samba scanner sdl semantic-desktop server%*
session sh4 sh4eb shared slp smbclient sndfile sockets source sparc32plus
sparc64 spell spl sse sse2 ssl startup-notification svg svga sysfs tcpd theora
threads thunar tiff truetype udev udev%* urandom usb v4l videos vorbis
websockets wifi win32codecs x264 x86 x86_64 xcb* xine xinerama xml xml2 xorg
xulrunner xv xvid zlib" ALSA_CARDS="snd_hda_intel" ALSA_PCM_PLUGINS="adpcm alaw
asym copy dmix dshare dsnoop empty extplug file hooks iec958 ioplug ladspa
lfloat linear meter mmap_emul mulaw multi null plug rate route share shm
softvol" APACHE2_MODULES="actions alias auth_basic authn_alias authn_anon
authn_dbm authn_default authn_file authz_dbm authz_default authz_groupfile
authz_host authz_owner authz_user autoindex cache dav dav_fs dav_lock deflate
dir disk_cache env expires ext_filter file_cache filter headers include info
log_config logio mem_cache mime mime_magic negotiation rewrite setenvif speling
status unique_id userdir usertrack vhost_alias" ELIBC="glibc"
INPUT_DEVICES="evdev" KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk
hd44780 lb216 lcdm001 mtxorb ncurses text" RUBY_TARGETS="ruby18" USERLAND="GNU"
VIDEO_CARDS="fbdev i810 nv nvidia tdfx trident vesa vga"

[Comment 2 Ian Delaney (RETIRED) 2010-02-17 10:49:14 UTC]

(In reply to comment #1)

I'm new at this so please excuse my fumbling around.  It's changed from the above state.  All I've done is followed the bug how to guide to debug, added debug into package.use, and re-emerged it a couple of times.
After re-emerging it once, it switched from error "no hypervisor driver"
to just "connection refused". Normally I can get past this, but no.
I re-emerged the second time, this time the libvirtd won't even start

idella@genny ~ $ sudo /etc/init.d/libvirtd start
Password:
 * Starting libvirtd ...                                                               [ !! ]
 * ERROR: libvirtd failed to start

However,

idella@genny ~ $ gdb /usr/sbin/libvirtd                                                    

warning: Can not parse XML syscalls information; XML support was disabled at compile time.
GNU gdb (Gentoo 7.0.1 p1) 7.0.1                                                           
Copyright (C) 2009 Free Software Foundation, Inc.                                         
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>             
This is free software: you are free to change and redistribute it.                        
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"                
and "show warranty" for details.                                                          
This GDB was configured as "i686-pc-linux-gnu".                                           
For bug reporting instructions, please see:                                               
<http://bugs.gentoo.org/>...                                                              
Reading symbols from /usr/sbin/libvirtd...(no debugging symbols found)...done.            
(gdb) run                                                                                 
Starting program: /usr/sbin/libvirtd                                                      
[Thread debugging using libthread_db enabled]                                             
18:13:05.159: warning : remoteReadConfigFile:2721 : Cannot set group when not running as root
[New Thread 0xb7a08b70 (LWP 27832)]
[New Thread 0xb70ffb70 (LWP 27833)]
[New Thread 0xb68feb70 (LWP 27834)]
[New Thread 0xb60ddb70 (LWP 27835)]
[New Thread 0xb58c5b70 (LWP 27836)]
[New Thread 0xb50c4b70 (LWP 27837)]
18:13:05.252: error : udevStrToLong_ui:73 : Failed to convert '00f6' to unsigned int

^X^Z
Program received signal SIGTSTP, Stopped (user).
0xb7fe0430 in __kernel_vsyscall ()
(gdb) bt
#0  0xb7fe0430 in __kernel_vsyscall ()
#1  0xb7b5ecb7 in pthread_join () from /lib/libpthread.so.0
#2  0x0805bc6a in ?? ()
#3  0xb7a22bb5 in __libc_start_main () from /lib/libc.so.6
#4  0x08054961 in ?? ()

I don't now how relevant this is given the libvirtd wouldn't supposedly start.
However,

idella@genny ~ $ ls /var/run/libvirt
libvirt-sock  libvirt-sock-ro  lxc  network

Now this really puzzles.  I'd have thought they shouldn't be there if the daemon wouldn't start.  But they are.  Any attempts to connect must go through libvirt, so as expected, 

idella@genny ~ $ sudo virt-install
Password:
ERROR    unable to connect to '/var/run/libvirt/libvirt-sock': Connection refused
Traceback (most recent call last):
  File "/usr/bin/virt-install", line 943, in <module>
    main()
  File "/usr/bin/virt-install", line 715, in main
    conn = cli.getConnection(options.connect)
  File "/usr/lib/python2.6/site-packages/virtinst/cli.py", line 162, in getConnection
    conn = open_connection(connect)
  File "/usr/lib/python2.6/site-packages/virtinst/cli.py", line 177, in open_connection
    open_flags)
  File "/usr/lib/python2.6/site-packages/libvirt.py", line 111, in openAuth
    if ret is None:raise libvirtError('virConnectOpenAuth() failed')
libvirtError: unable to connect to '/var/run/libvirt/libvirt-sock': Connection refused

Similar for virt-manager.  I don't know what happened to no driver, but it fails to connect

[Comment 3 Ian Delaney (RETIRED) 2010-02-17 13:48:09 UTC]

(In reply to comment #2)
> (In reply to comment #1)
> 
> I'm new at this so please excuse my fumbling around.   All I've done is followed the bug how to guide to debug, added
> debug into package.use, and re-emerged it a couple of times.
> After re-emerging it once, it switched from error "no hypervisor driver"
> to just "connection refused". 
> 
> idella@genny ~ $ sudo /etc/init.d/libvirtd start
> Password:
>  * Starting libvirtd ...                                                       
>        [ !! ]
>  * ERROR: libvirtd failed to start
> 
> However,
> 
> idella@genny ~ $ gdb /usr/sbin/libvirtd                                         
> 
> warning: Can not parse XML syscalls information; XML support was disabled at
> compile time.
> GNU gdb (Gentoo 7.0.1 p1) 7.0.1                                                 
> Copyright (C) 2009 Free Software Foundation, Inc.                               
> License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>   
> This is free software: you are free to change and redistribute it.              
> There is NO WARRANTY, to the extent permitted by law.  Type "show copying"      
> and "show warranty" for details.                                                
> This GDB was configured as "i686-pc-linux-gnu".                                 
> For bug reporting instructions, please see:                                     
> <http://bugs.gentoo.org/>...                                                    
> Reading symbols from /usr/sbin/libvirtd...(no debugging symbols found)...done.  
> (gdb) run                                                                       
> Starting program: /usr/sbin/libvirtd                                            
> [Thread debugging using libthread_db enabled]                                   
> 18:13:05.159: warning : remoteReadConfigFile:2721 : Cannot set group when not
> running as root
> [New Thread 0xb7a08b70 (LWP 27832)]
> [New Thread 0xb70ffb70 (LWP 27833)]
> [New Thread 0xb68feb70 (LWP 27834)]
> [New Thread 0xb60ddb70 (LWP 27835)]
> [New Thread 0xb58c5b70 (LWP 27836)]
> [New Thread 0xb50c4b70 (LWP 27837)]
> 18:13:05.252: error : udevStrToLong_ui:73 : Failed to convert '00f6' to
> unsigned int
> 
> ^X^Z
> Program received signal SIGTSTP, Stopped (user).
> 0xb7fe0430 in __kernel_vsyscall ()
> (gdb) bt
> #0  0xb7fe0430 in __kernel_vsyscall ()
> #1  0xb7b5ecb7 in pthread_join () from /lib/libpthread.so.0
> #2  0x0805bc6a in ?? ()
> #3  0xb7a22bb5 in __libc_start_main () from /lib/libc.so.6
> #4  0x08054961 in ?? ()
> 
> judging from another bug of which libvirt has many, it seems this is from the simple presence of the pid file.  Remove the pid file once and

idella@gentoo64 ~ $ sudo /etc/init.d/libvirtd restart
Password:
 * Stopping libvirtd ...                                                     [ ok ]
 * Starting libvirtd ...                                                     [ ok ]
> 
>So the driver absence is the probelem. 
>
> idella@gentoo64 ~ $ sudo gdb virsh

warning: Can not parse XML syscalls information; XML support was disabled at compile time.
GNU gdb (Gentoo 7.0.1 p1) 7.0.1
Copyright (C) 2009 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "x86_64-pc-linux-gnu".
For bug reporting instructions, please see:
<http://bugs.gentoo.org/>...
Reading symbols from /usr/bin/virsh...(no debugging symbols found)...done.
(gdb) run -c qemu:///
Starting program: /usr/bin/virsh -c qemu:///
[Thread debugging using libthread_db enabled]
error: no hypervisor driver available for qemu:///
error: failed to connect to the hypervisor

Program exited with code 01.

and

idella@gentoo64 ~ $ sudo virt-install
ERROR    No 'Guest' class for virtualization type 'lxc'
Traceback (most recent call last):
  File "/usr/bin/virt-install", line 943, in <module>
    main()
  File "/usr/bin/virt-install", line 742, in main
    guest = installer.guest_from_installer()
  File "/usr/lib64/python2.6/site-packages/virtinst/Installer.py", line 378, in guest_from_installer
    % self.type))
ValueError: No 'Guest' class for virtualization type 'lxc'

virt-install ofcourse uses libvirt, so here is another point of failure.  I suspect the python packages are not at fault..??

[Comment 4 Xake 2010-02-18 09:44:50 UTC]

Try rebuild app-emulation/libvirt with USE="qemu"

[Comment 5 Ian Delaney (RETIRED) 2010-02-18 13:12:56 UTC]

(In reply to comment #4)
> Try rebuild app-emulation/libvirt with USE="qemu"
> 

Sorry for being so verbose and duplicating.  You are on the money.
All that and such a short and simple remedy.  Very good, thanks.

idella@gentoo64 ~ $ virsh -c qemu
error: no hypervisor driver available for qemu
error: failed to connect to the hypervisor
idella@gentoo64 ~ $ sudo virsh -c qemu
Password:
error: no hypervisor driver available for qemu
error: failed to connect to the hypervisor
idella@gentoo64 ~ $ su
Password:
gentoo64 idella # virsh
Welcome to virsh, the virtualization interactive terminal.

Type:  'help' for help with commands
       'quit' to quit

virsh # connect qemu:///
error: Failed to connect to the hypervisor
error: internal error unexpected QEMU URI path '/', try qemu:///system

virsh # connect qemu:///system

virsh #

and 

idella@gentoo64 ~ $ sudo virt-install
Password:
ERROR    A name is required for the virtual machine. (use --prompt to run interactively)


yes and yes.  Does this mean to get full connectivity, compile with

USE="qemu kvm xen" emerge libvirt        ??

Well I tried it anyway.  Gentoo is up there.

[Comment 6 Ian Delaney (RETIRED) 2010-02-20 03:02:38 UTC]

*** This bug has been marked as a duplicate of bug 305407 ***