* [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
@ 2013-06-20 2:42 Sam Stoelinga
2013-07-25 15:46 ` Eric Blake
` (3 more replies)
0 siblings, 4 replies; 7+ messages in thread
From: Sam Stoelinga @ 2013-06-20 2:42 UTC (permalink / raw)
To: qemu-devel
Public bug reported:
I'm trying to use the option: -snapshot write to temporary files
instead of disk image files
How to reproduce? See following log:
2013-06-20 02:13:18.532+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-1.0 -no-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-0000002b -uuid 2d600758-ae56-48b8-bd4d-999744a038e4 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000002b.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /opt/stack/data/nova/instances/instance-0000002b/kernel -initrd /opt/stack/data/nova/instances/instance-0000002b/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:03:ab:18,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/data/nova/instances/instance-0000002b/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:26868 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -snapshot
Domain id=1 is tainted: custom-argv
char device redirected to /dev/pts/18
qemu-system-x86_64: -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /opt/stack/data/nova/instances/instance-0000002b/disk: Permission denied
2013-06-20 02:13:18.683+0000: shutting down
Version: QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c)
2003-2008 Fabrice Bellard
Related info:
The disk is a qcow2 image with a backing file. Both the backing file and the disk are cmodded with 777.
This is a log from dmesg related to apparmor:
[ 236.531287] type=1400 audit(1371694399.156:17): apparmor="STATUS" operation="profile_remove" name="libvirt-2d600758-ae56-48b8-bd4d-999744a038e4" pid=4201 comm="apparmor_parser"
libvirt.xml that I'm using:
<domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<uuid>2d600758-ae56-48b8-bd4d-999744a038e4</uuid>
<name>instance-0000002b</name>
<memory>524288</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
<kernel>/opt/stack/data/nova/instances/instance-0000002b/kernel</kernel>
<initrd>/opt/stack/data/nova/instances/instance-0000002b/ramdisk</initrd>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset="utc"/>
<devices>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2" cache="none"/>
<source file="/opt/stack/data/nova/instances/instance-0000002b/disk"/>
<target bus="virtio" dev="vda"/>
</disk>
<disk type="block" device="cdrom">
<driver name="qemu" type="raw"/>
<target tray="open" dev="hdc"/>
<readonly/>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:03:ab:18"/>
<source bridge="br100"/>
<filterref filter="nova-instance-instance-0000002b-fa163e03ab18">
<parameter name="IP" value="10.0.0.3"/>
<parameter name="DHCPSERVER" value="10.0.0.1"/>
<parameter name="PROJNET" value="10.0.0.0"/>
<parameter name="PROJMASK" value="255.255.255.0"/>
</filterref>
</interface>
<serial type="file">
<source path="/opt/stack/data/nova/instances/instance-0000002b/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="no" port="32768" keymap="en-us" listen="127.0.0.1"/>
</devices>
<qemu:commandline>
<qemu:arg value='-snapshot'/>
</qemu:commandline>
</domain>
** Affects: qemu
Importance: Undecided
Status: New
--
You received this bug notification because you are a member of qemu-
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https://bugs.launchpad.net/bugs/1192780
Title:
qemu-kvm with snapshot option always fails with Permission denied
Could not open disk image
Status in QEMU:
New
Bug description:
I'm trying to use the option: -snapshot write to temporary files
instead of disk image files
How to reproduce? See following log:
2013-06-20 02:13:18.532+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-1.0 -no-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-0000002b -uuid 2d600758-ae56-48b8-bd4d-999744a038e4 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000002b.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /opt/stack/data/nova/instances/instance-0000002b/kernel -initrd /opt/stack/data/nova/instances/instance-0000002b/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:03:ab:18,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/data/nova/instances/instance-0000002b/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:26868 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -snapshot
Domain id=1 is tainted: custom-argv
char device redirected to /dev/pts/18
qemu-system-x86_64: -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /opt/stack/data/nova/instances/instance-0000002b/disk: Permission denied
2013-06-20 02:13:18.683+0000: shutting down
Version: QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c)
2003-2008 Fabrice Bellard
Related info:
The disk is a qcow2 image with a backing file. Both the backing file and the disk are cmodded with 777.
This is a log from dmesg related to apparmor:
[ 236.531287] type=1400 audit(1371694399.156:17): apparmor="STATUS" operation="profile_remove" name="libvirt-2d600758-ae56-48b8-bd4d-999744a038e4" pid=4201 comm="apparmor_parser"
libvirt.xml that I'm using:
<domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<uuid>2d600758-ae56-48b8-bd4d-999744a038e4</uuid>
<name>instance-0000002b</name>
<memory>524288</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
<kernel>/opt/stack/data/nova/instances/instance-0000002b/kernel</kernel>
<initrd>/opt/stack/data/nova/instances/instance-0000002b/ramdisk</initrd>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset="utc"/>
<devices>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2" cache="none"/>
<source file="/opt/stack/data/nova/instances/instance-0000002b/disk"/>
<target bus="virtio" dev="vda"/>
</disk>
<disk type="block" device="cdrom">
<driver name="qemu" type="raw"/>
<target tray="open" dev="hdc"/>
<readonly/>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:03:ab:18"/>
<source bridge="br100"/>
<filterref filter="nova-instance-instance-0000002b-fa163e03ab18">
<parameter name="IP" value="10.0.0.3"/>
<parameter name="DHCPSERVER" value="10.0.0.1"/>
<parameter name="PROJNET" value="10.0.0.0"/>
<parameter name="PROJMASK" value="255.255.255.0"/>
</filterref>
</interface>
<serial type="file">
<source path="/opt/stack/data/nova/instances/instance-0000002b/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="no" port="32768" keymap="en-us" listen="127.0.0.1"/>
</devices>
<qemu:commandline>
<qemu:arg value='-snapshot'/>
</qemu:commandline>
</domain>
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1192780/+subscriptions
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-06-20 2:42 [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image Sam Stoelinga
@ 2013-07-25 15:46 ` Eric Blake
2013-07-25 16:09 ` [Qemu-devel] [Bug 1192780] " Deepak C Shetty
` (2 subsequent siblings)
3 siblings, 0 replies; 7+ messages in thread
From: Eric Blake @ 2013-07-25 15:46 UTC (permalink / raw)
To: Bug 1192780; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 797 bytes --]
On 06/19/2013 08:42 PM, Sam Stoelinga wrote:
> Public bug reported:
>
> I'm trying to use the option: -snapshot write to temporary files
> instead of disk image files
>
>
> libvirt.xml that I'm using:
> <domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
> <qemu:commandline>
> <qemu:arg value='-snapshot'/>
> </qemu:commandline>
> </domain>
This is unsupported usage of libvirt, and not a qemu bug. You'd need to
take this up with the libvirt list to get libvirt to properly support
temporary disk images without needing <qemu:commandline>, and so that
libvirt is properly setting SELinux permissions on the temporary file.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
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^ permalink raw reply [flat|nested] 7+ messages in thread
* [Qemu-devel] [Bug 1192780] Re: qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-06-20 2:42 [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image Sam Stoelinga
2013-07-25 15:46 ` Eric Blake
@ 2013-07-25 16:09 ` Deepak C Shetty
2013-07-25 16:32 ` Eric Blake
2013-07-26 4:55 ` Deepak C Shetty
2017-07-20 12:00 ` Thomas Huth
3 siblings, 1 reply; 7+ messages in thread
From: Deepak C Shetty @ 2013-07-25 16:09 UTC (permalink / raw)
To: qemu-devel
Hi, quick question,
I thought that using the <transient/> xml tag of <disk> element is the right way to do in libvirt ?
Why is <qemu:commandline> method being used ?
Also with -snapshot, iiuc the temp. file is created by QEMU internally,
so which temp. file and its selinux perms is being referenced above ?
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1192780
Title:
qemu-kvm with snapshot option always fails with Permission denied
Could not open disk image
Status in QEMU:
New
Bug description:
I'm trying to use the option: -snapshot write to temporary files
instead of disk image files
How to reproduce? See following log:
2013-06-20 02:13:18.532+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-1.0 -no-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-0000002b -uuid 2d600758-ae56-48b8-bd4d-999744a038e4 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000002b.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /opt/stack/data/nova/instances/instance-0000002b/kernel -initrd /opt/stack/data/nova/instances/instance-0000002b/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:03:ab:18,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/data/nova/instances/instance-0000002b/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:26868 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -snapshot
Domain id=1 is tainted: custom-argv
char device redirected to /dev/pts/18
qemu-system-x86_64: -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /opt/stack/data/nova/instances/instance-0000002b/disk: Permission denied
2013-06-20 02:13:18.683+0000: shutting down
Version: QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c)
2003-2008 Fabrice Bellard
Related info:
The disk is a qcow2 image with a backing file. Both the backing file and the disk are cmodded with 777.
This is a log from dmesg related to apparmor:
[ 236.531287] type=1400 audit(1371694399.156:17): apparmor="STATUS" operation="profile_remove" name="libvirt-2d600758-ae56-48b8-bd4d-999744a038e4" pid=4201 comm="apparmor_parser"
libvirt.xml that I'm using:
<domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<uuid>2d600758-ae56-48b8-bd4d-999744a038e4</uuid>
<name>instance-0000002b</name>
<memory>524288</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
<kernel>/opt/stack/data/nova/instances/instance-0000002b/kernel</kernel>
<initrd>/opt/stack/data/nova/instances/instance-0000002b/ramdisk</initrd>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset="utc"/>
<devices>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2" cache="none"/>
<source file="/opt/stack/data/nova/instances/instance-0000002b/disk"/>
<target bus="virtio" dev="vda"/>
</disk>
<disk type="block" device="cdrom">
<driver name="qemu" type="raw"/>
<target tray="open" dev="hdc"/>
<readonly/>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:03:ab:18"/>
<source bridge="br100"/>
<filterref filter="nova-instance-instance-0000002b-fa163e03ab18">
<parameter name="IP" value="10.0.0.3"/>
<parameter name="DHCPSERVER" value="10.0.0.1"/>
<parameter name="PROJNET" value="10.0.0.0"/>
<parameter name="PROJMASK" value="255.255.255.0"/>
</filterref>
</interface>
<serial type="file">
<source path="/opt/stack/data/nova/instances/instance-0000002b/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="no" port="32768" keymap="en-us" listen="127.0.0.1"/>
</devices>
<qemu:commandline>
<qemu:arg value='-snapshot'/>
</qemu:commandline>
</domain>
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1192780/+subscriptions
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Qemu-devel] [Bug 1192780] Re: qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-07-25 16:09 ` [Qemu-devel] [Bug 1192780] " Deepak C Shetty
@ 2013-07-25 16:32 ` Eric Blake
2013-07-25 16:45 ` Eric Blake
0 siblings, 1 reply; 7+ messages in thread
From: Eric Blake @ 2013-07-25 16:32 UTC (permalink / raw)
To: Bug 1192780; +Cc: qemu-devel
[-- Attachment #1: Type: text/plain, Size: 1119 bytes --]
On 07/25/2013 10:09 AM, Deepak C Shetty wrote:
> Hi, quick question,
> I thought that using the <transient/> xml tag of <disk> element is the right way to do in libvirt ?
Yes, that is the designed way. Unfortunately, it has not been
implemented yet (no one has been clamoring for the feature enough to
write the patch themselves, or for someone else to take interest and
write a patch on their behalf).
> Why is <qemu:commandline> method being used ?
To try and work around the unimplemented nature of the libvirt design.
>
> Also with -snapshot, iiuc the temp. file is created by QEMU internally,
> so which temp. file and its selinux perms is being referenced above ?
>
Qemu creating a file itself when libvirt has set SELinux rules on the
qemu instance is very likely to fail, since qemu doesn't know what label
to give the temp file, but the temp file must be labeled to be used.
Hence, this really needs to be implemented properly in libvirt, and is
not a qemu bug.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 621 bytes --]
^ permalink raw reply [flat|nested] 7+ messages in thread
* Re: [Qemu-devel] [Bug 1192780] Re: qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-07-25 16:32 ` Eric Blake
@ 2013-07-25 16:45 ` Eric Blake
0 siblings, 0 replies; 7+ messages in thread
From: Eric Blake @ 2013-07-25 16:45 UTC (permalink / raw)
Cc: Bug 1192780, qemu-devel
[-- Attachment #1: Type: text/plain, Size: 758 bytes --]
On 07/25/2013 10:32 AM, Eric Blake wrote:
> On 07/25/2013 10:09 AM, Deepak C Shetty wrote:
>> Hi, quick question,
>> I thought that using the <transient/> xml tag of <disk> element is the right way to do in libvirt ?
>
> Yes, that is the designed way. Unfortunately, it has not been
> implemented yet (no one has been clamoring for the feature enough to
> write the patch themselves, or for someone else to take interest and
> write a patch on their behalf).
In particular, see this libvirt bug, which is stagnating due to
higher-priority bugs that I am working on first:
https://bugzilla.redhat.com/show_bug.cgi?id=832194
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
[-- Attachment #2: OpenPGP digital signature --]
[-- Type: application/pgp-signature, Size: 621 bytes --]
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Qemu-devel] [Bug 1192780] Re: qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-06-20 2:42 [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image Sam Stoelinga
2013-07-25 15:46 ` Eric Blake
2013-07-25 16:09 ` [Qemu-devel] [Bug 1192780] " Deepak C Shetty
@ 2013-07-26 4:55 ` Deepak C Shetty
2017-07-20 12:00 ` Thomas Huth
3 siblings, 0 replies; 7+ messages in thread
From: Deepak C Shetty @ 2013-07-26 4:55 UTC (permalink / raw)
To: qemu-devel
Eric,
Thanks for the quick reply. I saw the <transient/> desc. in formatdomain.html and thought its supported. So does that mean its supported for other hypervisors but not QEMU/KVM ? If not supported at all, why does it show up in the doc... its misleading.
I had a recent need to start exploiting this feature and landed up here.
I am willing to work on supporting <transient/> with your guidance :)
since I don't have much knowledge of SELinux.
thanx,
deepak
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1192780
Title:
qemu-kvm with snapshot option always fails with Permission denied
Could not open disk image
Status in QEMU:
New
Bug description:
I'm trying to use the option: -snapshot write to temporary files
instead of disk image files
How to reproduce? See following log:
2013-06-20 02:13:18.532+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-1.0 -no-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-0000002b -uuid 2d600758-ae56-48b8-bd4d-999744a038e4 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000002b.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /opt/stack/data/nova/instances/instance-0000002b/kernel -initrd /opt/stack/data/nova/instances/instance-0000002b/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:03:ab:18,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/data/nova/instances/instance-0000002b/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:26868 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -snapshot
Domain id=1 is tainted: custom-argv
char device redirected to /dev/pts/18
qemu-system-x86_64: -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /opt/stack/data/nova/instances/instance-0000002b/disk: Permission denied
2013-06-20 02:13:18.683+0000: shutting down
Version: QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c)
2003-2008 Fabrice Bellard
Related info:
The disk is a qcow2 image with a backing file. Both the backing file and the disk are cmodded with 777.
This is a log from dmesg related to apparmor:
[ 236.531287] type=1400 audit(1371694399.156:17): apparmor="STATUS" operation="profile_remove" name="libvirt-2d600758-ae56-48b8-bd4d-999744a038e4" pid=4201 comm="apparmor_parser"
libvirt.xml that I'm using:
<domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<uuid>2d600758-ae56-48b8-bd4d-999744a038e4</uuid>
<name>instance-0000002b</name>
<memory>524288</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
<kernel>/opt/stack/data/nova/instances/instance-0000002b/kernel</kernel>
<initrd>/opt/stack/data/nova/instances/instance-0000002b/ramdisk</initrd>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset="utc"/>
<devices>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2" cache="none"/>
<source file="/opt/stack/data/nova/instances/instance-0000002b/disk"/>
<target bus="virtio" dev="vda"/>
</disk>
<disk type="block" device="cdrom">
<driver name="qemu" type="raw"/>
<target tray="open" dev="hdc"/>
<readonly/>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:03:ab:18"/>
<source bridge="br100"/>
<filterref filter="nova-instance-instance-0000002b-fa163e03ab18">
<parameter name="IP" value="10.0.0.3"/>
<parameter name="DHCPSERVER" value="10.0.0.1"/>
<parameter name="PROJNET" value="10.0.0.0"/>
<parameter name="PROJMASK" value="255.255.255.0"/>
</filterref>
</interface>
<serial type="file">
<source path="/opt/stack/data/nova/instances/instance-0000002b/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="no" port="32768" keymap="en-us" listen="127.0.0.1"/>
</devices>
<qemu:commandline>
<qemu:arg value='-snapshot'/>
</qemu:commandline>
</domain>
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1192780/+subscriptions
^ permalink raw reply [flat|nested] 7+ messages in thread
* [Qemu-devel] [Bug 1192780] Re: qemu-kvm with snapshot option always fails with Permission denied Could not open disk image
2013-06-20 2:42 [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image Sam Stoelinga
` (2 preceding siblings ...)
2013-07-26 4:55 ` Deepak C Shetty
@ 2017-07-20 12:00 ` Thomas Huth
3 siblings, 0 replies; 7+ messages in thread
From: Thomas Huth @ 2017-07-20 12:00 UTC (permalink / raw)
To: qemu-devel
According to Eric's comments, this was a libvirt bug, not a QEMU bug, so
closing this ticket now. If you still encounter this problem, please
report it to the libvirt project instead.
** Changed in: qemu
Status: New => Invalid
--
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/1192780
Title:
qemu-kvm with snapshot option always fails with Permission denied
Could not open disk image
Status in QEMU:
Invalid
Bug description:
I'm trying to use the option: -snapshot write to temporary files
instead of disk image files
How to reproduce? See following log:
2013-06-20 02:13:18.532+0000: starting up
LC_ALL=C PATH=/usr/local/sbin:/usr/local/bin:/usr/bin:/usr/sbin:/sbin:/bin QEMU_AUDIO_DRV=none /usr/bin/qemu-system-x86_64 -S -M pc-1.0 -no-kvm -m 512 -smp 1,sockets=1,cores=1,threads=1 -name instance-0000002b -uuid 2d600758-ae56-48b8-bd4d-999744a038e4 -nodefconfig -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance-0000002b.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -kernel /opt/stack/data/nova/instances/instance-0000002b/kernel -initrd /opt/stack/data/nova/instances/instance-0000002b/ramdisk -append root=/dev/vda console=ttyS0 -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none -device virtio-blk-pci,bus=pci.0,addr=0x4,drive=drive-virtio-disk0,id=virtio-disk0 -drive if=none,media=cdrom,id=drive-ide0-1-0,readonly=on,format=raw -device ide-drive,bus=ide.1,unit=0,drive=drive-ide0-1-0,id=ide0-1-0 -netdev tap,fd=19,id=hostnet0 -device rtl8139,netdev=hostnet0,id=net0,mac=fa:16:3e:03:ab:18,bus=pci.0,addr=0x3 -chardev file,id=charserial0,path=/opt/stack/data/nova/instances/instance-0000002b/console.log -device isa-serial,chardev=charserial0,id=serial0 -chardev pty,id=charserial1 -device isa-serial,chardev=charserial1,id=serial1 -usb -device usb-tablet,id=input0 -vnc 127.0.0.1:26868 -k en-us -vga cirrus -device virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x5 -snapshot
Domain id=1 is tainted: custom-argv
char device redirected to /dev/pts/18
qemu-system-x86_64: -drive file=/opt/stack/data/nova/instances/instance-0000002b/disk,if=none,id=drive-virtio-disk0,format=qcow2,cache=none: could not open disk image /opt/stack/data/nova/instances/instance-0000002b/disk: Permission denied
2013-06-20 02:13:18.683+0000: shutting down
Version: QEMU emulator version 1.0 (qemu-kvm-1.0), Copyright (c)
2003-2008 Fabrice Bellard
Related info:
The disk is a qcow2 image with a backing file. Both the backing file and the disk are cmodded with 777.
This is a log from dmesg related to apparmor:
[ 236.531287] type=1400 audit(1371694399.156:17): apparmor="STATUS" operation="profile_remove" name="libvirt-2d600758-ae56-48b8-bd4d-999744a038e4" pid=4201 comm="apparmor_parser"
libvirt.xml that I'm using:
<domain type="qemu" xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'>
<uuid>2d600758-ae56-48b8-bd4d-999744a038e4</uuid>
<name>instance-0000002b</name>
<memory>524288</memory>
<vcpu>1</vcpu>
<os>
<type>hvm</type>
<kernel>/opt/stack/data/nova/instances/instance-0000002b/kernel</kernel>
<initrd>/opt/stack/data/nova/instances/instance-0000002b/ramdisk</initrd>
<cmdline>root=/dev/vda console=ttyS0</cmdline>
</os>
<features>
<acpi/>
<apic/>
</features>
<clock offset="utc"/>
<devices>
<disk type="file" device="disk">
<driver name="qemu" type="qcow2" cache="none"/>
<source file="/opt/stack/data/nova/instances/instance-0000002b/disk"/>
<target bus="virtio" dev="vda"/>
</disk>
<disk type="block" device="cdrom">
<driver name="qemu" type="raw"/>
<target tray="open" dev="hdc"/>
<readonly/>
</disk>
<interface type="bridge">
<mac address="fa:16:3e:03:ab:18"/>
<source bridge="br100"/>
<filterref filter="nova-instance-instance-0000002b-fa163e03ab18">
<parameter name="IP" value="10.0.0.3"/>
<parameter name="DHCPSERVER" value="10.0.0.1"/>
<parameter name="PROJNET" value="10.0.0.0"/>
<parameter name="PROJMASK" value="255.255.255.0"/>
</filterref>
</interface>
<serial type="file">
<source path="/opt/stack/data/nova/instances/instance-0000002b/console.log"/>
</serial>
<serial type="pty"/>
<input type="tablet" bus="usb"/>
<graphics type="vnc" autoport="no" port="32768" keymap="en-us" listen="127.0.0.1"/>
</devices>
<qemu:commandline>
<qemu:arg value='-snapshot'/>
</qemu:commandline>
</domain>
To manage notifications about this bug go to:
https://bugs.launchpad.net/qemu/+bug/1192780/+subscriptions
^ permalink raw reply [flat|nested] 7+ messages in thread
end of thread, other threads:[~2017-07-20 12:16 UTC | newest]
Thread overview: 7+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2013-06-20 2:42 [Qemu-devel] [Bug 1192780] [NEW] qemu-kvm with snapshot option always fails with Permission denied Could not open disk image Sam Stoelinga
2013-07-25 15:46 ` Eric Blake
2013-07-25 16:09 ` [Qemu-devel] [Bug 1192780] " Deepak C Shetty
2013-07-25 16:32 ` Eric Blake
2013-07-25 16:45 ` Eric Blake
2013-07-26 4:55 ` Deepak C Shetty
2017-07-20 12:00 ` Thomas Huth
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