guestfsd(8) Virtualization Support guestfsd(8)NAMEguestfsd - guestfs daemon
SYNOPSISguestfsd [-r] [-v|--verbose]
DESCRIPTION
"guestfsd" is the libguestfs daemon. Normal users never need to run
this program explicitly. This man page discusses what "guestfsd" does
in both the libguestfs appliance and when using libguestfs live.
LIBGUESTFS APPLIANCE
For the architecture of the libguestfs appliance, see "ARCHITECTURE" in
guestfs(3).
After the appliance boots, the "/init" script in the appliance starts
"guestfsd" with no arguments. "guestfsd" opens the virtio-serial port
on a known path (see "FILES"). It initiates the protocol (see
"COMMUNICATION PROTOCOL" in guestfs(3)) and processes requests one at a
time from the library until the appliance is destroyed.
Filesystems are mounted under "/sysroot" and all filesystem operations
happen relative to this directory.
LIBGUESTFS LIVE
In the libguestfs live case, "guestfsd -r" is started from the rc-
scripts, systemd, etc.
The "-r" option causes the daemon to operate on the root filesystem
instead of "/sysroot".
Currently (because of limitations in virtio-serial) only one client can
connect at a time, and "guestfsd" must be restarted after each client
disconnects. If libguestfs live were changed to use a different
transport such as TCP/IP then this limitation could be removed.
OPTIONS
-?
--help
Display brief help.
-r Set the root filesystem to be "/" (instead of the default which is
"/sysroot"). Also do not unmount filesystems when the daemon
exits.
This option is used to enable libguestfs live.
-v
--verbose
Enable verbose messages for debugging.
The verbose flag is also set if the Linux command line contains the
substring "guestfs_verbose=1".
EXIT STATUS
This program returns 0 if successful, or non-zero if there was an
error.
FILES
"/dev/virtio-ports/org.libguestfs.channel.0"
The virtio serial port which "guestfsd" connects to.
"/proc/cmdline"
The Linux command line is parsed to discover "guestfs_*" flags.
SEE ALSOguestfs(3), http://libguestfs.org/.
AUTHOR
Richard W.M. Jones http://people.redhat.com/~rjones/
COPYRIGHT
Copyright (C) 2009-2013 Red Hat Inc.
LICENSE
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.
BUGS
To get a list of bugs against libguestfs, use this link:
https://bugzilla.redhat.com/buglist.cgi?component=libguestfs&product=Virtualization+Tools
To report a new bug against libguestfs, use this link:
https://bugzilla.redhat.com/enter_bug.cgi?component=libguestfs&product=Virtualization+Tools
When reporting a bug, please supply:
· The version of libguestfs.
· Where you got libguestfs (eg. which Linux distro, compiled from
source, etc)
· Describe the bug accurately and give a way to reproduce it.
· Run libguestfs-test-tool(1) and paste the complete, unedited output
into the bug report.
libguestfs-1.20.4 2013-03-12 guestfsd(8)
