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[libvirt-users] How to tell if a hypervisor connection has died?
by Guido Winkelmann 27 Apr '13

27 Apr '13

Hi, What's the best way to tell if a virConnect object is not good to use anymore? (For example because the libvirtd on the other side crashed/has been stopped or because of some network failure) When I try this, the first API call I do on a broken connection yields an error with error number 38 (VIR_ERR_SYSTEM_ERROR) and all subsequent calls yield an error number 1 (VIR_ERR_INTERNAL_ERROR). Both of those are really unhelpful and could mean just about anything... Guido

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[libvirt-users] how to control usb read write perm
by yue 26 Apr '13

26 Apr '13

hi,all i have 2 questions. both is related to spice usb redirect. 1. if i can control RW perm of usb device which is producted via spice ? in order to control user's rw operation in guestVM . 2.if user have several usbs, and plug them at the same time when using spice client. if i can control which usb(s) can be accessed by user in guestVM? thanks

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[libvirt-users] 答复: libvirt_lxc start problem when selinux enbale
by Huang,Chaochang 25 Apr '13

25 Apr '13

Sorry “There is avc error messages in dmesg ……” ――should be “There is no avc error……” 发件人: Huang,Chaochang 发送时间: 2013年4月25日 15:41 收件人: 'libvir-list(a)redhat.com'; 'libvirt-users(a)redhat.com' 主题: libvirt_lxc start problem when selinux enbale Hi，all： the problem came out when selinux was enforced in targeted+MCS I start lxc through virsh――“virsh -c lxc:/// start instance-00004bd6” 1. When selinux is Permissive，lxc start is ok The result of “Ps auxZ” is： system_u:system_r:virtd_lxc_t:s0-s0:c0.c1023 root 19218 0.0 0.0 47624 1244 ? Ss 15:26 0:00 /usr/libexec/libvirt_lxc --name system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19219 0.3 0.0 19276 1532 ? Ss 15:26 0:00 /sbin/init system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19406 0.0 0.0 177444 1332 ? Sl 15:26 0:00 /sbin/rsyslogd -i /var/run/sysl system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19420 0.0 0.0 64120 1144 ? Ss 15:26 0:00 /usr/sbin/sshd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19427 0.0 0.0 22136 956 ? Ss 15:26 0:00 xinetd -stayalive -pidfile /var system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19434 0.0 0.0 64316 832 ? Ss 15:26 0:00 /usr/sbin/saslauthd -m /var/run system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19435 0.0 0.0 64316 600 ? S 15:26 0:00 /usr/sbin/saslauthd -m /var/run system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19450 0.0 0.0 82388 2392 ? Ss 15:26 0:00 sendmail: rejecting new message system_u:system_r:svirt_lxc_net_t:s0:c192,c392 51 19459 0.0 0.0 78116 2016 ? Ss 15:26 0:00 sendmail: Queue runner@01:00:00 system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19467 0.0 0.0 175528 3672 ? Ss 15:26 0:00 /usr/sbin/httpd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 48 19470 0.0 0.0 175528 2204 ? S 15:26 0:00 /usr/sbin/httpd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19475 0.0 0.0 117212 1348 ? Ss 15:26 0:00 crond system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19491 0.0 0.0 4108 600 pts/0 Ss+ 15:26 0:00 /sbin/mingetty /dev/tty1 We can get into the lxc through “ssh” 2. When selinux is Enforcing，lxc start bad Th result of “ps auxZ” is: system_u:system_r:virtd_lxc_t:s0-s0:c0.c1023 root 20624 0.0 0.0 47624 1244 ? Ss 15:29 0:00 /usr/libexec/libvirt_lxc --name system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 20625 0.0 0.0 17172 1036 pts/0 Ss+ 15:29 0:00 /sbin/init Only /sbin/init process started, no else. This is the real problem There is avc error messages in dmesg、/var/log/messages、/var/log/secure, and the same with selinux is Permissive Can anybody give some hints? Here are some system information: Kernel version 3.3.4 Libvirt version 0.9.13 Lxc guest image Centos 6.3 Lxc xml info is:  <domain type='lxc'> <name>instance-00004bd6</name> <uuid>96eada0e-7ea0-4865-8271-3565811c8eb0</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> <cmdline>console=ttyS0</cmdline> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/home/stack/nova_state/instances/instance-00004bd6/rootfs'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='fa:16:3e:09:00:a2'/> <source bridge='br100'/> <filterref filter='nova-instance-instance-00004bd6-fa163e0900a2'> <parameter name='DHCPSERVER' value='10.0.0.1'/> <parameter name='IP' value='10.0.0.11'/> <parameter name='PROJMASK' value='255.255.254.0'/> <parameter name='PROJNET' value='10.0.0.0'/> </filterref> </interface> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> <seclabel type='static' model='selinux' relabel='yes'> <label>system_u:system_r:svirt_lxc_net_t:s0:c192,c392</label> </seclabel> </domain> Best Regard Huangchaochang

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[libvirt-users] libvirt_lxc start problem when selinux enbale
by Huang,Chaochang 25 Apr '13

25 Apr '13

Hi，all： the problem came out when selinux was enforced in targeted+MCS I start lxc through virsh――“virsh -c lxc:/// start instance-00004bd6” 1. When selinux is Permissive，lxc start is ok The result of “Ps auxZ” is： system_u:system_r:virtd_lxc_t:s0-s0:c0.c1023 root 19218 0.0 0.0 47624 1244 ? Ss 15:26 0:00 /usr/libexec/libvirt_lxc --name system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19219 0.3 0.0 19276 1532 ? Ss 15:26 0:00 /sbin/init system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19406 0.0 0.0 177444 1332 ? Sl 15:26 0:00 /sbin/rsyslogd -i /var/run/sysl system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19420 0.0 0.0 64120 1144 ? Ss 15:26 0:00 /usr/sbin/sshd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19427 0.0 0.0 22136 956 ? Ss 15:26 0:00 xinetd -stayalive -pidfile /var system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19434 0.0 0.0 64316 832 ? Ss 15:26 0:00 /usr/sbin/saslauthd -m /var/run system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19435 0.0 0.0 64316 600 ? S 15:26 0:00 /usr/sbin/saslauthd -m /var/run system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19450 0.0 0.0 82388 2392 ? Ss 15:26 0:00 sendmail: rejecting new message system_u:system_r:svirt_lxc_net_t:s0:c192,c392 51 19459 0.0 0.0 78116 2016 ? Ss 15:26 0:00 sendmail: Queue runner@01:00:00 system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19467 0.0 0.0 175528 3672 ? Ss 15:26 0:00 /usr/sbin/httpd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 48 19470 0.0 0.0 175528 2204 ? S 15:26 0:00 /usr/sbin/httpd system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19475 0.0 0.0 117212 1348 ? Ss 15:26 0:00 crond system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 19491 0.0 0.0 4108 600 pts/0 Ss+ 15:26 0:00 /sbin/mingetty /dev/tty1 We can get into the lxc through “ssh” 2. When selinux is Enforcing，lxc start bad Th result of “ps auxZ” is: system_u:system_r:virtd_lxc_t:s0-s0:c0.c1023 root 20624 0.0 0.0 47624 1244 ? Ss 15:29 0:00 /usr/libexec/libvirt_lxc --name system_u:system_r:svirt_lxc_net_t:s0:c192,c392 root 20625 0.0 0.0 17172 1036 pts/0 Ss+ 15:29 0:00 /sbin/init Only /sbin/init process started, no else. This is the real problem There is avc error messages in dmesg、/var/log/messages、/var/log/secure, and the same with selinux is Permissive Can anybody give some hints? Here are some system information: Kernel version 3.3.4 Libvirt version 0.9.13 Lxc guest image Centos 6.3 Lxc xml info is:  <domain type='lxc'> <name>instance-00004bd6</name> <uuid>96eada0e-7ea0-4865-8271-3565811c8eb0</uuid> <memory unit='KiB'>524288</memory> <currentMemory unit='KiB'>524288</currentMemory> <vcpu placement='static'>1</vcpu> <os> <type arch='x86_64'>exe</type> <init>/sbin/init</init> <cmdline>console=ttyS0</cmdline> </os> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/libexec/libvirt_lxc</emulator> <filesystem type='mount' accessmode='passthrough'> <source dir='/home/stack/nova_state/instances/instance-00004bd6/rootfs'/> <target dir='/'/> </filesystem> <interface type='bridge'> <mac address='fa:16:3e:09:00:a2'/> <source bridge='br100'/> <filterref filter='nova-instance-instance-00004bd6-fa163e0900a2'> <parameter name='DHCPSERVER' value='10.0.0.1'/> <parameter name='IP' value='10.0.0.11'/> <parameter name='PROJMASK' value='255.255.254.0'/> <parameter name='PROJNET' value='10.0.0.0'/> </filterref> </interface> <console type='pty'> <target type='lxc' port='0'/> </console> </devices> <seclabel type='static' model='selinux' relabel='yes'> <label>system_u:system_r:svirt_lxc_net_t:s0:c192,c392</label> </seclabel> </domain> Best Regard Huangchaochang

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[libvirt-users] how to control usb read write perm
by yue 25 Apr '13

25 Apr '13

hi,all i have 2 questions. both is related to spice usb redirect. 1. if i can control RW perm of usb device which is producted via spice ? in order to control user's rw operation in guestVM . 2.if user have several usbs, and plug them at the same time when using spice client. if i can control which usb(s) can be accessed by user in guestVM? thanks

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[libvirt-users] dnsmasq does not start
by Alexey Kardashevskiy 25 Apr '13

25 Apr '13

Hi! I am trying to run tap networking with libvirtd. My test system is Fedora18/ppc64, libvirt 1.0.4 (compiled from git and installed). On another system with Fedora17/ppc64 with the same settings, dnsmasq is running. All configs in /etc/libvirt/ are default and not changed, the only exception is /etc/libvirt/qemu/networks/default.xml which I copied from Fedora17/ppc64 setup. What does exactly force libvirtd to start dnsmasq? Some debug info: [root@vpl2 ~]# ps ax | egrep \(dnsmasq\|libvirt\) 9021 ? Ssl 0:00 /usr/sbin/libvirtd 9271 pts/0 S+ 0:00 egrep --color=auto (dnsmasq|libvirt) [root@vpl2 ~]# [root@vpl2 ~]# cat /etc/libvirt/qemu/networks/default.xml <network> <name>default</name> <bridge name="virbr%d" /> <forward/> <ip address="192.168.122.1" netmask="255.255.255.0"> <dhcp> <range start="192.168.122.2" end="192.168.122.254" /> </dhcp> </ip> </network> [root@vpl2 ~]# [root@vpl2 ~]# service libvirtd restart Redirecting to /bin/systemctl restart libvirtd.service [root@vpl2 ~]# [root@vpl2 ~]# [root@vpl2 ~]# ps ax | egrep \(dnsmasq\|libvirt\) 9365 ? Ssl 0:00 /usr/sbin/libvirtd 9507 pts/0 S+ 0:00 egrep --color=auto (dnsmasq|libvirt) [root@vpl2 ~]# [root@vpl2 ~]# ls -laR /var/log/libvirt/ /var/log/libvirt/: total 20 drwx------. 5 root root 4096 Apr 9 16:51 . drwxr-xr-x. 18 root root 4096 Apr 24 13:48 .. drwx------. 2 root root 4096 Apr 9 16:51 lxc drwx------. 2 root root 4096 Apr 24 17:22 qemu drwx------. 2 root root 4096 Apr 9 16:51 uml /var/log/libvirt/lxc: total 8 drwx------. 2 root root 4096 Apr 9 16:51 . drwx------. 5 root root 4096 Apr 9 16:51 .. /var/log/libvirt/qemu: total 8 drwx------. 2 root root 4096 Apr 24 17:22 . drwx------. 5 root root 4096 Apr 9 16:51 .. /var/log/libvirt/uml: total 8 drwx------. 2 root root 4096 Apr 9 16:51 . drwx------. 5 root root 4096 Apr 9 16:51 .. [root@vpl2 ~]# -- Alexey

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[libvirt-users] how to limit each spice-client can only see its own usb device.
by yue 24 Apr '13

24 Apr '13

hi,all i use thin client to visit guestVM(throught spice), if i attach usb device to thin client, how to assure that this usb can be only accessed by the guestVM corresponding to thin client? thanks

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[libvirt-users] Lack of ebtables rules when using nwfilters
by Maciej Gałkiewicz 24 Apr '13

24 Apr '13

Hi I am using libvirt (0.9.12) with openstack and xen. It looks like libvirt is not creating ebtables rules against arp spoofing etc. Here are my configs: VM definition: <domain type='xen'> <uuid>d49b777f-32f1-4093-ae47-a12efd0efd2c</uuid> <name>instance-00000168</name> <memory>2097152</memory> <os> <type>linux</type> <root>/dev/xvda</root> <kernel>/var/lib/nova/instances/instance-00000168/kernel</kernel> <cmdline>ro</cmdline> <initrd>/var/lib/nova/instances/instance-00000168/ramdisk</initrd> </os> <features> <acpi/> </features> <vcpu>2</vcpu> <devices> <disk type='file' device='disk'> <driver type='raw' cache='none'/> <source file='/var/lib/nova/instances/instance-00000168/disk'/> <target dev='sda' bus='scsi'/> </disk> <disk type='file'> <driver type='raw' cache='none'/> <source file='/var/lib/nova/instances/instance-00000168/disk.swap'/> <target dev='sdb' bus='scsi'/> </disk> <interface type='bridge'> <source bridge='br0'/> <mac address='fa:16:3e:1e:70:87'/> <filterref filter="nova-instance-instance-00000168-fa163e1e7087"> <parameter name="IP" value="10.255.0.114" /> <parameter name="DHCPSERVER" value="10.255.0.3" /> </filterref> </interface> <console type='pty'/> <graphics type='vnc' port='-1' autoport='yes' keymap='en-us' listen='127.0.0.1'/> </devices> </domain> # virsh nwfilter-dumpxml nova-instance-instance-00000168-fa163e1e7087 <filter name='nova-instance-instance-00000168-fa163e1e7087' chain='root'> <uuid>b6475525-5901-aeab-4ed0-dc0d7b545aea</uuid> <filterref filter='nova-base'/> </filter> # virsh nwfilter-dumpxml nova-base <filter name='nova-base' chain='root'> <uuid>197b7f7a-389c-bd6d-6b77-07b88d3d9138</uuid> <filterref filter='no-mac-spoofing'/> <filterref filter='no-ip-spoofing'/> <filterref filter='no-arp-spoofing'/> </filter> # ebtables -t nat -L Bridge table: nat Bridge chain: PREROUTING, entries: 0, policy: ACCEPT Bridge chain: OUTPUT, entries: 0, policy: ACCEPT Bridge chain: POSTROUTING, entries: 0, policy: ACCEPT # ebtables -L Bridge table: filter Bridge chain: INPUT, entries: 0, policy: ACCEPT Bridge chain: FORWARD, entries: 0, policy: ACCEPT Bridge chain: OUTPUT, entries: 0, policy: ACCEPT logs: 2013-04-23 10:47:37.438+0000: 30155: debug : virNWFilterDefineXML:16099 : conn=0x1331ff0, xmlDesc=<filter name='nova-instance-instance-00000167-fa163e4faae5' chain='roo t'><filterref filter='nova-base'/></filter> 2013-04-23 10:47:37.544+0000: 30155: debug : virNWFilterFree:15971 : nwfilter=0x7f18400bc2b0 2013-04-23 10:47:37.544+0000: 30155: debug : virUnrefNWFilter:1262 : unref nwfilter 0x7f18400bc2b0 nova-instance-instance-00000167-fa163e4faae5 1 2013-04-23 10:47:37.544+0000: 30155: debug : virReleaseNWFilter:1222 : release nwfilter 0x7f18400bc2b0 nova-instance-instance-00000167-fa163e4faae5 875ff1e5-fc4d-2fca-9 da2-f163f273ad6a 2013-04-23 10:47:37.544+0000: 30155: debug : virReleaseNWFilter:1229 : unref connection 0x1331ff0 2 regards Maciej Gałkiewicz

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[libvirt-users] Create image from running domain
by Hongbin Lu 23 Apr '13

23 Apr '13

Hi. A short question. I want to know what is the proper steps to create an image from a running domain and use it as base image of another domains. The domain is with Qemu Hypervisor, persistent, and created based on Ubuntu Cloud image. Thank in advance Hongbin

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[libvirt-users] failure creating a snapshot volume within a lvm-based pool
by Edoardo Comar 23 Apr '13

23 Apr '13

Hi I have defined a logical pool and a volume within it # virsh vol-create-as images_lvm myvol 2G Vol myvol created # virsh vol-list images_lvm Name Path ----------------------------------------- myvol /dev/libvirt_images_vg/myvol if I try to create another volume using the previous one as backing-vol, the creation fails with what looks like an incorrect commandline for lvcreate: # virsh vol-create-as images_lvm myvol-instance 2G --backing-vol myvol error: Failed to create vol myvol-instance error: internal error Child process (/usr/sbin/lvcreate --name myvol-instance -L 2097152K -s=/dev/libvirt_images_vg/myvol) unexpected exit status 3: /usr/sbin/lvcreate: invalid option -- '=' Error during parsing of command line. Exactly the same happens if I specify a qcow2 format (the doc however says that The logical volume pool does not use the volume format type element). is this a known bug? I'm running Fedora 18 # virsh version Compiled against library: libvirt 0.10.2 Using library: libvirt 0.10.2 Using API: QEMU 0.10.2 Running hypervisor: QEMU 1.2.2 -------------------------------------------------- regards, Edoardo Comar WebSphere Application Service Platform for Networks (ASPN) ecomar(a)uk.ibm.com Unless stated otherwise above: IBM United Kingdom Limited - Registered in England and Wales with number 741598. Registered office: PO Box 41, North Harbour, Portsmouth, Hampshire PO6 3AU

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