No SELinux or AppArmor is used. qemu.conf shows it's running by root user. I did "virsh start" operation under root and the error remains. Should I change the permission attributes of files under /var/lib/libvirt/qemu ? BTW, could you please tell me the libvirt mailing list address? Thanks. 从三星移动设备发送 -------- 原始邮件 -------- 发件人： "Richard W.M. Jones" <rjones@redhat.com> 日期: 2014-07-07 16:16 (GMT+08:00) 收件人： fangtuo90 <fangtuo90@gmail.com> 抄送: libguestfs@redhat.com 主题： Re: [Libguestfs] cannot connect to channel device On Mon, Jul 07, 2014 at 09:23:05AM +0800, fangtuo90 wrote:> Here is what I got. > root@ubuntu:/home/john# virsh start ubuntu2 > error: Failed to start domain ubuntu2 > error: internal error Process exited while reading console log output: char device redirected to /dev/pts/1 > bind(unix:/var/lib/libvirt/qemu/ubuntu2.libguestfs): Permission denied > chardev: opening backend "socket" failed: Permission denied > > root@ubuntu:/home/john# ll /var/lib/libvirt/qemu/ > total 20 > drwxr-x--- 5 libvirt-qemu kvm 4096 Jul 5 14:44 ./ > drwxr-xr-x 8 root root 4096 May 20 04:18 ../ > drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 dump/ > drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 save/ > drwxr-xr-x 2 libvirt-qemu kvm 4096 May 20 04:18 snapshot/I'm guessing this is some kind of permissions or SELinux labelling problem, but I don't know specifically what the problem is. Have a look at the libvirt configuration file /etc/libvirt/qemu.conf to see what user qemu runs as. Also if using SELinux or AppArmor then look for alerts there. You might be better off asking on the libvirt-users mailing list. Rich.> root@ubuntu:/home/john# cat /etc/libvirt/qemu/ubuntu2.xml > <!-- > WARNING: THIS IS AN AUTO-GENERATED FILE. CHANGES TO IT ARE LIKELY TO BE > OVERWRITTEN AND LOST. Changes to this xml configuration should be made using: > virsh edit ubuntu2 > or other application using the libvirt API. > --> > > <domain type='kvm' xmlns:qemu='/schemas/domain/qemu/1.0'> > <qemu:commandline> > <qemu:arg value='-s'/> > </qemu:commandline> > <name>ubuntu2</name> > <uuid>03f4c36d-9509-05dd-167d-d2613d1dd883</uuid> > <memory>1024000</memory> > <currentMemory>1024000</currentMemory> > <vcpu>1</vcpu> > <os> > <type arch='x86_64' machine='pc-1.0'>hvm</type> > <boot dev='hd'/> > </os> > <features> > <acpi/> > <apic/> > <pae/> > </features> > <clock offset='utc'/> > <on_poweroff>destroy</on_poweroff> > <on_reboot>restart</on_reboot> > <on_crash>restart</on_crash> > <devices> > <emulator>/usr/bin/kvm</emulator> > <disk type='file' device='disk'> > <driver name='qemu' type='qcow2'/> > <source file='/home/john/ubuntu-1204-vm.img'/> > <target dev='hda' bus='ide'/> > <address type='drive' controller='0' bus='0' unit='0'/> > </disk> > <controller type='ide' index='0'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/> > </controller> > <interface type='bridge'> > <mac address='52:54:00:d4:7d:07'/> > <source bridge='br0'/> > <model type='virtio'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x03' function='0x0'/> > </interface> > <serial type='pty'> > <target port='0'/> > </serial> > <console type='pty'> > <target type='serial' port='0'/> > </console> > <input type='mouse' bus='ps2'/> > <graphics type='vnc' port='-1' autoport='yes'/> > <sound model='ich6'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x04' function='0x0'/> > </sound> > <video> > <model type='cirrus' vram='9216' heads='1'/> > <address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/> > </video> > <memballoon model='virtio'> > <address type='pci' domain='0x0000' bus='0x00' slot='0x05' function='0x0'/> > </memballoon> > <channel type='unix'> > <source mode='bind' path='/var/lib/libvirt/qemu/ubuntu2.libguestfs' /> > <target type='virtio' name='org.libguestfs.channel.0' /> > </channel> > </devices> > </domain> > > When I deleted the <channel>...</channel> part, it will start normally. But I need it to use guestfish with --live option.> _______________________________________________ > Libguestfs mailing list > Libguestfs@redhat.com > https://www.redhat.com/mailman/listinfo/libguestfs-- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html
Richard W.M. Jones
2014-Jul-07 11:51 UTC
Re: [Libguestfs] 回复: Re: cannot connect to channel device
On Mon, Jul 07, 2014 at 05:16:25PM +0800, fangtuo90 wrote:> No SELinux or AppArmor is used. qemu.conf shows it's running by > root user. I did "virsh start" operation under root and the error > remains. Should I change the permission attributes of files under > /var/lib/libvirt/qemu ? > > BTW, could you please tell me the libvirt mailing list address? Thanks.This one I think: http://www.redhat.com/mailman/listinfo/libvirt-users Rich. -- Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones Read my programming and virtualization blog: http://rwmj.wordpress.com virt-builder quickly builds VMs from scratch http://libguestfs.org/virt-builder.1.html