[Libguestfs] hang after seabios

Zetan Drableg zetan.drableg at gmail.com
Thu Jul 31 22:32:18 UTC 2014


Ok -
By the way, I looked into updating out KVM versions. Since we already
have so many KVM servers of this version in production, I can't easily
forklift update everything without much testing.

exec /usr/libexec/qemu-kvm -s -S "$@"

export LIBGUESTFS_HV=/root/work/qemu-wrapper
export LIBGUESTFS_BACKEND=direct

How do I simulate the setup of devices the test tool perform?
Just copy/pasting the qemu-kvm argument list doesn't work.

I was hoping that LIBGUESTFS_HV would replace usage of
/usr/libexec/qemu-kvm with /root/work/qemu-wrapper, but does not
appear to

[root at us7-sec-vm-02 work]# ./test.sh
+ /root/work/qemu-wrapper -global virtio-blk-pci.scsi=off -nodefconfig
-nodefaults -nographic -machine accel=kvm:tcg -cpu host,+kvmclock -m
500 -no-reboot -kernel /var/tmp/.guestfs-0/kernel.20700 -initrd
/var/tmp/.guestfs-0/initrd.20700 -device virtio-scsi-pci,id=scsi
-drive file=/tmp/libguestfs-test-tool-sda-uGZyEt,cache=none,format=raw,id=hd0,if=none
-device scsi-hd,drive=hd0 -drive
file=/var/tmp/.guestfs-0/root.20700,snapshot=on,id=appliance,if=none,cache=unsafe
-device scsi-hd,drive=appliance -device virtio-serial -serial stdio
-device sga -chardev
socket,path=/tmp/libguestfsG73eA4/guestfsd.sock,id=channel0 -device
virtserialport,chardev=channel0,name=org.libguestfs.channel.0 -append
'panic=1 console=ttyS0 udevtimeout=600 no_timer_check acpi=off
printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0
guestfs_verbose=1 TERM=xterm'
qemu-kvm: -chardev
socket,path=/tmp/libguestfsG73eA4/guestfsd.sock,id=channel0: socket
connect failed: Connection refused
qemu-kvm: -chardev
socket,path=/tmp/libguestfsG73eA4/guestfsd.sock,id=channel0: chardev:
opening backend "socket" failed



[root at work]# libguestfs-test-tool
     ************************************************************
     *                    IMPORTANT NOTICE
     *
     * When reporting bugs, include the COMPLETE, UNEDITED
     * output below in your bug report.
     *
     ************************************************************
LIBGUESTFS_HV=/root/work/qemu-wrapper
LIBGUESTFS_BACKEND=direct
PATH=/usr/lib64/qt-3.3/bin:/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin
SELinux: Enforcing
library version: 1.20.11rhel=6,release=2.el6
guestfs_get_append: (null)
guestfs_get_attach_method: appliance
guestfs_get_autosync: 1
guestfs_get_cachedir: /var/tmp
guestfs_get_direct: 0
guestfs_get_memsize: 500
guestfs_get_network: 0
guestfs_get_path: /usr/lib64/guestfs
guestfs_get_pgroup: 0
guestfs_get_qemu: /usr/libexec/qemu-kvm
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: attach-method=appliance
libguestfs: launch: tmpdir=/tmp/libguestfsG73eA4
libguestfs: launch: umask=0077
libguestfs: launch: euid=0
libguestfs: command: run: febootstrap-supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ -f checksum
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ x86_64
supermin helper [00000ms] whitelist = (not specified), host_cpu =
x86_64, kernel = (null), initrd = (null), appliance = (null)
supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d
checking modpath /lib/modules/2.6.39-400.215.6.el6uek.x86_64 is a directory
picked vmlinuz-2.6.39-400.215.6.el6uek.x86_64 because modpath
/lib/modules/2.6.39-400.215.6.el6uek.x86_64 exists
checking modpath /lib/modules/2.6.39-400.215.4.el6uek.x86_64 is a directory
picked vmlinuz-2.6.39-400.215.4.el6uek.x86_64 because modpath
/lib/modules/2.6.39-400.215.4.el6uek.x86_64 exists
checking modpath /lib/modules/2.6.32-431.23.3.el6.x86_64 is a directory
picked vmlinuz-2.6.32-431.23.3.el6.x86_64 because modpath
/lib/modules/2.6.32-431.23.3.el6.x86_64 exists
checking modpath /lib/modules/2.6.32-279.el6.x86_64 is a directory
picked vmlinuz-2.6.32-279.el6.x86_64 because modpath
/lib/modules/2.6.32-279.el6.x86_64 exists
checking modpath /lib/modules/2.6.32-431.20.5.el6.x86_64 is a directory
picked vmlinuz-2.6.32-431.20.5.el6.x86_64 because modpath
/lib/modules/2.6.32-431.20.5.el6.x86_64 exists
checking modpath /lib/modules/2.6.39-200.24.1.el6uek.x86_64 is a directory
picked vmlinuz-2.6.39-200.24.1.el6uek.x86_64 because modpath
/lib/modules/2.6.39-200.24.1.el6uek.x86_64 exists
supermin helper [00000ms] finished creating kernel
supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d
supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/base.img
supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img
supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
supermin helper [00025ms] visiting /usr/lib64/guestfs/supermin.d/init.img
supermin helper [00025ms] visiting /usr/lib64/guestfs/supermin.d/udev-rules.img
supermin helper [00025ms] adding kernel modules
supermin helper [00057ms] finished creating appliance
libguestfs: checksum of existing appliance:
2886a8f3710fce98f495863d78188571ec8d400168688aea3f253d8cf67304b4
libguestfs: [00060ms] begin testing qemu features
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -help
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -version
libguestfs: qemu version 0.12
libguestfs: command: run: /usr/libexec/qemu-kvm
libguestfs: command: run: \ -nographic
libguestfs: command: run: \ -machine accel=kvm:tcg
libguestfs: command: run: \ -device ?
libguestfs: [00229ms] finished testing qemu features
libguestfs: accept_from_daemon: 0x182fe00 g->state = 1
[00230ms] /usr/libexec/qemu-kvm \
    -global virtio-blk-pci.scsi=off \
    -nodefconfig \
    -nodefaults \
    -nographic \
    -machine accel=kvm:tcg \
    -cpu host,+kvmclock \
    -m 500 \
    -no-reboot \
    -kernel /var/tmp/.guestfs-0/kernel.20700 \
    -initrd /var/tmp/.guestfs-0/initrd.20700 \
    -device virtio-scsi-pci,id=scsi \
    -drive file=/tmp/libguestfs-test-tool-sda-uGZyEt,cache=none,format=raw,id=hd0,if=none
\
    -device scsi-hd,drive=hd0 \
    -drive file=/var/tmp/.guestfs-0/root.20700,snapshot=on,id=appliance,if=none,cache=unsafe
\
    -device scsi-hd,drive=appliance \
    -device virtio-serial \
    -serial stdio \
    -device sga \
    -chardev socket,path=/tmp/libguestfsG73eA4/guestfsd.sock,id=channel0 \
    -device virtserialport,chardev=channel0,name=org.libguestfs.channel.0 \
    -append 'panic=1 console=ttyS0 udevtimeout=600 no_timer_check
acpi=off printk.time=1 cgroup_disable=memory root=/dev/sdb selinux=0
guestfs_verbose=1 TERM=xterm'
\x1b[1;256r\x1b[256;256H\x1b[6n
Google, Inc.
Serial Graphics Adapter 10/14/11
SGABIOS $Id: sgabios.S 8 2010-04-22 00:03:40Z nlaredo $
(mockbuild at ca-build44.us.oracle.com) Fri Oct 14 20:04:36 UTC 2011
Term: 80x24
4 0
SeaBIOS (version seabios-0.6.1.2-28.el6)
Probing EDD (edd=off to disable)... ok
\x1b[2J

On Thu, Jul 31, 2014 at 3:00 PM, Richard W.M. Jones <rjones at redhat.com> wrote:
> [Let's keep this on the mailing list]
>
> On Thu, Jul 31, 2014 at 02:48:25PM -0700, Zetan Drableg wrote:
>> Hi Richard,
>> I created qemu-wrapper:
>> #!/bin/bash -x
>>
>> exec gdbserver :1234 /usr/libexec/qemu-kvm "$@"
>
> gdbserver will end up debugging the qemu process, not the guest
> inside.  This is not useful.
>
> You need to do something like:
>
>   exec /usr/libexec/qemu-kvm -s -S "$@"
>
> Rich.
>
> --
> Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
> Read my programming and virtualization blog: http://rwmj.wordpress.com
> virt-p2v converts physical machines to virtual machines.  Boot with a
> live CD or over the network (PXE) and turn machines into KVM guests.
> http://libguestfs.org/virt-v2v




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