I just wanted to follow-up to add that eventually, the virtual machine did start, and now "virsh list" works as expected. But it took nearly 30 minutes. The updated libvirt.log is shown below. Notice the huge jump in time, from 16:47 to 17:14. (Side question: it appears the timestamps are UTC, rather than my local time, any way to address that?)

2014-10-14 16:47:11.527+0000: 4668: info : virDomainLoadAllConfigs:14718 : Loading config file 'mythbuntu.xml' 2014-10-14 16:47:11.529+0000: 4668: info : qemuDomainSnapshotLoad:484 : Scanning for snapshots for domain mythbuntu in /var/lib/libvirt/qemu/snapshot/mythbuntu 2014-10-14 17:14:41.751+0000: 4668: info : virNetDevProbeVnetHdr:94 : Enabling IFF_VNET_HDR 2014-10-14 17:14:41.805+0000: 4668: info : virSecurityDACSetOwnership:296 : Setting DAC user and group on '/home/kvm/mythbuntu.img' to '107:107' 2014-10-14 17:14:41.806+0000: 4668: info : virSecurityDACSetOwnership:296 : Setting DAC user and group on '/mnt/mythtv1/mythbackend_recordings' to '107:107' 2014-10-14 17:14:42.084+0000: 4668: info : lxcSecurityInit:1380 : lxcSecurityInit (null) 2014-10-14 17:14:42.084+0000: 4668: info : virDomainLoadAllConfigs:14696 : Scanning for configs in /var/run/libvirt/lxc 2014-10-14 17:14:42.084+0000: 4668: info : virDomainLoadAllConfigs:14696 : Scanning for configs in /etc/libvirt/lxc 2014-10-14 17:14:42.089+0000: 4659: error : virFileReadAll:462 : Failed to open file '/proc/4836/stat': No such file or directory 2014-10-14 17:14:42.090+0000: 4660: error : virFileReadAll:462 : Failed to open file '/proc/8017/stat': No such file or directory 2014-10-14 17:26:34.679+0000: 4661: info : remoteDispatchAuthList:2398 : Bypass polkit auth for privileged client pid:11343,uid:0

On Tue, Oct 14, 2014 at 12:08 PM, Matt Garman matthew.garman@gmail.com wrote:

I followed the wiki[1] to create a KVM virtual machine using bridged network on CentOS 6.5. It seemed to work fine on initial setup. (FWIW I'm trying to run a MythBuntu guest.) However, after a reboot, it doesn't auto-start the VMs.

Shortly after boot, if I go into "virsh", then do a "list", it just hangs. Likewise, if I go into "virt manager", it just hangs with the message "connecting".

Kernel version is: 2.6.32-431.29.2.el6.x86_64

Relevant package versions:

libvirt.x86_64 0.10.2-29.el6_5.12 libvirt-client.x86_64 0.10.2-29.el6_5.12 libvirt-python.x86_64 0.10.2-29.el6_5.12 python-virtinst.noarch 0.600.0-18.el6 virt-manager.x86_64 0.9.0-19.el6 virt-top.x86_64 1.0.4-3.15.el6 virt-viewer.x86_64 0.5.6-8.el6_5.3 qemu-img.x86_64 2:0.12.1.2-2.415.el6_5.14 qemu-kvm.x86_64 2:0.12.1.2-2.415.el6_5.14

CPU is a Xeon E3-1230v3. I have the virtualization setting enabled in the BIOS.

I googled on this, and saw a bunch of talk about two years ago regarding issues with the libvirt packages having a deadlock bug. But I think the versions of the relevant packages that I have installed are new enough to have fixes for that.

I also happened across an earlier post to this list[2], where it seemed someone was having a similar problem. I was previously attempting to use balance-rr and 802.3ad bonding modes on my host. However, I just changed to using "active-backup" and the problem remains.

I have in /etc/libvirt/libvirtd.conf the following three lines (the rest is stock, i.e. all comments): log_level = 2 log_filters="" log_outputs="1:file:/var/log/libvirt/libvirt.log"

Below I posted the contents of the libvirt log file after doing a "service libvirt start".

Anyone ever fought this before?

Thanks!

[1] http://wiki.centos.org/HowTos/KVM [2] http://lists.centos.org/pipermail/centos-virt/2014-March/003722.html

/var/log/libvirt/libvirt.log output: 2014-10-14 16:47:11.150+0000: 4657: info : libvirt version: 0.10.2, package: 29.el6_5.12 (CentOS BuildSystem http://bugs.centos.org, 2014-09-01-13:44:02, c6b8.bsys.dev.centos.org) 2014-10-14 16:47:11.150+0000: 4657: info : virNetlinkEventServiceStart:517 : starting netlink event service with protocol 0 2014-10-14 16:47:11.151+0000: 4657: info : virNetlinkEventServiceStart:517 : starting netlink event service with protocol 15 2014-10-14 16:47:11.154+0000: 4668: info : dnsmasqCapsSetFromBuffer:667 : dnsmasq version is 2.48, --bind-dynamic is NOT present, SO_BINDTODEVICE is NOT in use 2014-10-14 16:47:11.157+0000: 4668: info : networkReloadIptablesRules:1925 : Reloading iptables rules 2014-10-14 16:47:11.157+0000: 4668: info : networkRefreshDaemons:1287 : Refreshing network daemons 2014-10-14 16:47:11.278+0000: 4668: info : networkStartNetwork:2422 : Starting up network 'default' 2014-10-14 16:47:11.290+0000: 4668: info : virStorageBackendVolOpenCheckMode:1085 : Skipping special dir '.' 2014-10-14 16:47:11.290+0000: 4668: info : virStorageBackendVolOpenCheckMode:1085 : Skipping special dir '..' 2014-10-14 16:47:11.352+0000: 4668: info : qemudStartup:754 : Unable to create cgroup for driver: No such device or address 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'cpu' 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'cpuacct' 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'cpuset' 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'memory' 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'devices' 2014-10-14 16:47:11.353+0000: 4668: info : qemudLoadDriverConfig:411 : Configured cgroup controller 'blkio' 2014-10-14 16:47:11.509+0000: 4668: info : virDomainLoadAllConfigs:14696 : Scanning for configs in /var/run/libvirt/qemu 2014-10-14 16:47:11.527+0000: 4668: info : virDomainLoadAllConfigs:14696 : Scanning for configs in /etc/libvirt/qemu 2014-10-14 16:47:11.527+0000: 4668: info : virDomainLoadAllConfigs:14718 : Loading config file 'mythbuntu.xml' 2014-10-14 16:47:11.529+0000: 4668: info : qemuDomainSnapshotLoad:484 : Scanning for snapshots for domain mythbuntu in /var/lib/libvirt/qemu/snapshot/mythbuntu