[Libguestfs] Help: Is it possible to use libguestfs in Xen guest OS
Baochuan Wu
wildpointercs at gmail.com
Thu Apr 7 14:12:07 UTC 2016
Hi All,
I installed CentOS 7 as Xen Guest OS(DomU OS), I wonder if it is possible
to use libguestfs in this CentOS 7 VM? libguestfs-test-tools reports error:
*-bash-4.2# libguestfs-test-tool *
************************************************************
* IMPORTANT NOTICE
*
* When reporting bugs, include the COMPLETE, UNEDITED
* output below in your bug report.
*
************************************************************
LIBGUESTFS_BACKEND=libvirt
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/opt/vpxxcm/conversion
SELinux: sh: getenforce: command not found
guestfs_get_append: (null)
guestfs_get_autosync: 1
guestfs_get_backend: libvirt
guestfs_get_backend_settings: []
guestfs_get_cachedir: /var/tmp
guestfs_get_direct: 0
guestfs_get_hv: /usr/libexec/qemu-kvm
guestfs_get_memsize: 500
guestfs_get_network: 0
guestfs_get_path: /usr/lib64/guestfs
guestfs_get_pgroup: 0
guestfs_get_program: libguestfs-test-tool
guestfs_get_recovery_proc: 1
guestfs_get_selinux: 0
guestfs_get_smp: 1
guestfs_get_tmpdir: /tmp
guestfs_get_trace: 0
guestfs_get_verbose: 1
host_cpu: x86_64
Launching appliance, timeout set to 600 seconds.
libguestfs: launch: program=libguestfs-test-tool
libguestfs: launch: version=1.28.1rhel=7,release=1.55.el7.centos.2,libvirt
libguestfs: launch: backend registered: unix
libguestfs: launch: backend registered: uml
libguestfs: launch: backend registered: libvirt
libguestfs: launch: backend registered: direct
libguestfs: launch: backend=libvirt
libguestfs: launch: tmpdir=/tmp/libguestfsqw6Xky
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: libvirt version = 1002017 (1.2.17)
libguestfs: guest random name = guestfs-eln5avlfeu8xgpd8
libguestfs: [00000ms] connect to libvirt
libguestfs: opening libvirt handle: URI = qemu:///system, auth =
default+wrapper, flags = 0
libguestfs: successfully opened libvirt handle: conn = 0x7f08e0053d80
libguestfs: qemu version (reported by libvirt) = 1005003 (1.5.3)
libguestfs: [00001ms] get libvirt capabilities
libguestfs: [00002ms] parsing capabilities XML
libguestfs: [00003ms] build appliance
libguestfs: [00003ms] begin building supermin appliance
libguestfs: [00003ms] run supermin
libguestfs: command: run: /usr/bin/supermin5
libguestfs: command: run: \ --build
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ --if-newer
libguestfs: command: run: \ --lock /var/tmp/.guestfs-0/lock
libguestfs: command: run: \ --copy-kernel
libguestfs: command: run: \ -f ext2
libguestfs: command: run: \ --host-cpu x86_64
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ -o /var/tmp/.guestfs-0/appliance.d
supermin: version: 5.1.10
supermin: rpm: detected RPM version 4.11
supermin: package handler: fedora/rpm
supermin: acquiring lock on /var/tmp/.guestfs-0/lock
supermin: if-newer: output does not need rebuilding
libguestfs: [00011ms] finished building supermin appliance
libguestfs: command: run: qemu-img
libguestfs: command: run: \ create
libguestfs: command: run: \ -f qcow2
libguestfs: command: run: \ -o
backing_file=/var/tmp/.guestfs-0/appliance.d/root,backing_fmt=raw
libguestfs: command: run: \ /tmp/libguestfsqw6Xky/overlay2
Formatting '/tmp/libguestfsqw6Xky/overlay2', fmt=qcow2 size=4294967296
backing_file='/var/tmp/.guestfs-0/appliance.d/root' backing_fmt='raw'
encryption=off cluster_size=65536 lazy_refcounts=off
libguestfs: set_socket_create_context: context_new failed: kernel: Invalid
argument [you can ignore this UNLESS using SELinux + sVirt]
libguestfs: [00031ms] create libvirt XML
libguestfs: command: run: dmesg | grep -Eoh 'lpj=[[:digit:]]+'
libguestfs: read_lpj_from_dmesg: calculated lpj=2200086
libguestfs: libvirt XML:\n<?xml version="1.0"?>\n<domain type="qemu"
xmlns:qemu="http://libvirt.org/schemas/domain/qemu/1.0">\n
<name>guestfs-eln5avlfeu8xgpd8</name>\n <memory unit="MiB">500</memory>\n
<currentMemory unit="MiB">500</currentMemory>\n <vcpu>1</vcpu>\n <clock
offset="utc">\n <timer name="rtc" tickpolicy="catchup"/>\n <timer
name="pit" tickpolicy="delay"/>\n <timer name="hpet" present="no"/>\n
</clock>\n <os>\n <type>hvm</type>\n
<kernel>/var/tmp/.guestfs-0/appliance.d/kernel</kernel>\n
<initrd>/var/tmp/.guestfs-0/appliance.d/initrd</initrd>\n
<cmdline>panic=1 console=ttyS0 udevtimeout=6000 udev.event-timeout=6000
no_timer_check lpj=2200086 acpi=off printk.time=1 cgroup_disable=memory
root=/dev/sdb selinux=0 guestfs_verbose=1 TERM=xterm</cmdline>\n <bios
useserial="yes"/>\n </os>\n <on_reboot>destroy</on_reboot>\n <devices>\n
<controller type="scsi" index="0" model="virtio-scsi"/>\n <disk
device="disk" type="file">\n <source
file="/tmp/libguestfsqw6Xky/scratch.1"/>\n <target dev="sda"
bus="scsi"/>\n <driver name="qemu" type="raw" cache="unsafe"/>\n
<address type="drive" controller="0" bus="0" target="0" unit="0"/>\n
</disk>\n <disk type="file" device="disk">\n <source
file="/tmp/libguestfsqw6Xky/overlay2"/>\n <target dev="sdb"
bus="scsi"/>\n <driver name="qemu" type="qcow2" cache="unsafe"/>\n
<address type="drive" controller="0" bus="0" target="1" unit="0"/>\n
<shareable/>\n </disk>\n <serial type="unix">\n <source
mode="connect" path="/tmp/libguestfsqw6Xky/console.sock"/>\n <target
port="0"/>\n </serial>\n <channel type="unix">\n <source
mode="connect" path="/tmp/libguestfsqw6Xky/guestfsd.sock"/>\n <target
type="virtio" name="org.libguestfs.channel.0"/>\n </channel>\n
</devices>\n <qemu:commandline>\n <qemu:env name="TMPDIR"
value="/var/tmp"/>\n </qemu:commandline>\n</domain>\n
libguestfs: command: run: ls
libguestfs: command: run: \ -a
libguestfs: command: run: \ -l
libguestfs: command: run: \ -Z /var/tmp/.guestfs-0
libguestfs: drwxr-xr-x root root ? .
libguestfs: drwxrwxrwt root root ? ..
libguestfs: drwxr-xr-x root root ?
appliance.d
libguestfs: -rw-r--r-- root root ? lock
libguestfs: command: run: ls
libguestfs: command: run: \ -a
libguestfs: command: run: \ -l
libguestfs: command: run: \ -Z /tmp/libguestfsqw6Xky
libguestfs: drwxr-xr-x root root ? .
libguestfs: drwxrwxrwt root root ? ..
libguestfs: srw-rw---- root qemu ?
console.sock
libguestfs: srw-rw---- root qemu ?
guestfsd.sock
libguestfs: -rw-r--r-- root root ? overlay2
libguestfs: -rw-r--r-- root root ? scratch.1
libguestfs: -rwxr-xr-x root root ?
umask-check
libguestfs: [00041ms] launch libvirt guest
libguestfs: error: could not create appliance through libvirt.
Try running qemu directly without libvirt using this environment variable:
export LIBGUESTFS_BACKEND=direct
Original error from libvirt: internal error: process exited while
connecting to monitor: Cannot set up guest memory 'pc.ram': Cannot allocate
memory
[code=1 domain=10]
libguestfs-test-tool: failed to launch appliance
libguestfs: closing guestfs handle 0x7f08e0053620 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfsqw6Xky
*-bash-4.2# export LIBGUESTFS_BACKEND=direct*
*-bash-4.2# libguestfs-test-tool *
************************************************************
* IMPORTANT NOTICE
*
* When reporting bugs, include the COMPLETE, UNEDITED
* output below in your bug report.
*
************************************************************
LIBGUESTFS_BACKEND=direct
PATH=/sbin:/bin:/usr/sbin:/usr/bin:/usr/X11R6/bin:/opt/vpxxcm/conversion
SELinux: sh: getenforce: command not found
guestfs_get_append: (null)
guestfs_get_autosync: 1
guestfs_get_backend: direct
guestfs_get_backend_settings: []
guestfs_get_cachedir: /var/tmp
guestfs_get_direct: 0
guestfs_get_hv: /usr/libexec/qemu-kvm
guestfs_get_memsize: 500
guestfs_get_network: 0
guestfs_get_path: /usr/lib64/guestfs
guestfs_get_pgroup: 0
guestfs_get_program: libguestfs-test-tool
guestfs_get_recovery_proc: 1
guestfs_get_selinux: 0
guestfs_get_smp: 1
guestfs_get_tmpdir: /tmp
guestfs_get_trace: 0
guestfs_get_verbose: 1
host_cpu: x86_64
Launching appliance, timeout set to 600 seconds.
libguestfs: launch: program=libguestfs-test-tool
libguestfs: launch: version=1.28.1rhel=7,release=1.55.el7.centos.2,libvirt
libguestfs: launch: backend registered: unix
libguestfs: launch: backend registered: uml
libguestfs: launch: backend registered: libvirt
libguestfs: launch: backend registered: direct
libguestfs: launch: backend=direct
libguestfs: launch: tmpdir=/tmp/libguestfsvt8tnf
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: is_openable: /dev/kvm: No such file or directory
libguestfs: [00000ms] begin building supermin appliance
libguestfs: [00000ms] run supermin
libguestfs: command: run: /usr/bin/supermin5
libguestfs: command: run: \ --build
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ --if-newer
libguestfs: command: run: \ --lock /var/tmp/.guestfs-0/lock
libguestfs: command: run: \ --copy-kernel
libguestfs: command: run: \ -f ext2
libguestfs: command: run: \ --host-cpu x86_64
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ -o /var/tmp/.guestfs-0/appliance.d
supermin: version: 5.1.10
supermin: rpm: detected RPM version 4.11
supermin: package handler: fedora/rpm
supermin: acquiring lock on /var/tmp/.guestfs-0/lock
supermin: if-newer: output does not need rebuilding
libguestfs: [00013ms] finished building supermin appliance
libguestfs: [00013ms] begin testing qemu features
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -help
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -version
libguestfs: qemu version 1.5
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -display none
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: [00099ms] finished testing qemu features
libguestfs: command: run: dmesg | grep -Eoh 'lpj=[[:digit:]]+'
libguestfs: read_lpj_from_dmesg: calculated lpj=2200086
[00107ms] /usr/libexec/qemu-kvm \
-global virtio-blk-pci.scsi=off \
-nodefconfig \
-enable-fips \
-nodefaults \
-display none \
-machine accel=kvm:tcg \
-m 500 \
-no-reboot \
-rtc driftfix=slew \
-no-hpet \
-global kvm-pit.lost_tick_policy=discard \
-kernel /var/tmp/.guestfs-0/appliance.d/kernel \
-initrd /var/tmp/.guestfs-0/appliance.d/initrd \
-device virtio-scsi-pci,id=scsi \
-drive
file=/tmp/libguestfsvt8tnf/scratch.1,cache=unsafe,format=raw,id=hd0,if=none
\
-device scsi-hd,drive=hd0 \
-drive
file=/var/tmp/.guestfs-0/appliance.d/root,snapshot=on,id=appliance,cache=unsafe,if=none
\
-device scsi-hd,drive=appliance \
-device virtio-serial-pci \
-serial stdio \
-device sga \
-chardev socket,path=/tmp/libguestfsvt8tnf/guestfsd.sock,id=channel0 \
-device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
-append 'panic=1 console=ttyS0 udevtimeout=6000 udev.event-timeout=6000
no_timer_check lpj=2200086 acpi=off printk.time=1 cgroup_disable=memory
root=/dev/sdb selinux=0 guestfs_verbose=1 TERM=xterm'
Could not access KVM kernel module: No such file or directory
failed to initialize KVM: No such file or directory
Back to tcg accelerator.
Cannot set up guest memory 'pc.ram': Cannot allocate memory
libguestfs: error: appliance closed the connection unexpectedly, see
earlier error messages
libguestfs: child_cleanup: 0x7fd127b2d620: child process died
libguestfs: sending SIGTERM to process 17471
libguestfs: error: /usr/libexec/qemu-kvm exited with error status 1, see
debug messages above
libguestfs: error: guestfs_launch failed, see earlier error messages
libguestfs-test-tool: failed to launch appliance
libguestfs: closing guestfs handle 0x7fd127b2d620 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /tmp/libguestfsvt8tnf
-bash-4.2#
After running "*export LIBGUESTFS_BACKEND=direct*", it seems libguestfs
will launch another VM inside my VM. Is this necessary?
Any response is highly appreciated.
Thanks,
Allen
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