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官方文档（libvirtd各种故障诊断记录和解决办法非常详尽）
https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/Virtualization_Deployment_and_Administration_Guide/sect-Troubleshooting-Common_libvirt_errors_and_troubleshooting.html#sect-libvirtd_failed_to_start
开启系统日志
Change libvirt's logging in /etc/libvirt/libvirtd.conf by enabling the line below. To enable the setting the line, open the /etc/libvirt/libvirtd.conf file in a text editor, remove the hash (or #) symbol from the beginning of the following line, and save the change:
log_outputs="3:syslog:libvirtd"
参照配置，重启服务器等待下次故障观察日志
...... Jun 1 12:42:26 node5 abrtd: New client connected Jun 1 12:42:26 node5 abrtd: Directory 'pyhook-2016-06-01-12:42:26-70065' creation detected Jun 1 12:42:26 node5 abrt-server[70066]: Saved Python crash dump of pid 70065 to /var/spool/abrt/pyhook-2016-06-01-12:42:26-70065 Jun 1 12:42:26 node5 abrtd: Package 'cloudstack-common' isn't signed with proper key Jun 1 12:42:26 node5 abrtd: 'post-create' on '/var/spool/abrt/pyhook-2016-06-01-12:42:26-70065' exited with 1 Jun 1 12:42:26 node5 abrtd: Deleting problem directory '/var/spool/abrt/pyhook-2016-06-01-12:42:26-70065' Jun 1 12:43:26 node5 abrt: detected unhandled Python exception in '/usr/share/cloudstack-common/scripts/vm/network/security_group.py' ...... Jun 6 10:36:21 node5 libvirtd: 102840: warning : qemuDomainObjBeginJobInternal:878 : Cannot start job (modify, none) for domain i-4-30-VM; current job is (modify, none) owned by (102925, 0) Jun 6 10:36:21 node5 libvirtd: 102840: error : qemuDomainObjBeginJobInternal:883 : Timed out during operation: cannot acquire state change lock Jun 6 10:39:59 node5 libvirtd: 114071: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 6 10:39:59 node5 libvirtd: 114071: error : virNetSocketNewListenTCP:312 : Unable to bind to port: 地址已在使用 Jun 6 10:40:46 node5 libvirtd: 114147: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 6 10:40:46 node5 libvirtd: 114147: error : virNetSocketNewListenTCP:312 : Unable to bind to port: 地址已在使用 Jun 6 10:42:15 node5 libvirtd: 114204: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 6 10:42:15 node5 libvirtd: 114204: error : virNetSocketNewListenTCP:312 : Unable to bind to port: 地址已在使用 Jun 6 10:47:05 node5 libvirtd: 114375: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 6 10:47:05 node5 libvirtd: 114375: error : virNetSocketNewListenTCP:312 : Unable to bind to port: 地址已在使用 Jun 6 10:47:23 node5 libvirtd: 114412: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 6 10:47:23 node5 libvirtd: 114412: error : virNetSocketNewListenTCP:312 : Unable to bind to port: 地址已在使用 ...... Jun 12 03:08:02 node5 rsyslogd: [origin software="rsyslogd" swVersion="5.8.10" x-pid="3111" x-info="http://www.rsyslog.com"] rsyslogd was HUPed Jun 12 09:20:40 node5 libvirtd: 72575: info : libvirt version: 0.10.2, package: 54.el6_7.2 (CentOS BuildSystem <http://bugs.centos.org>, 2015-11-10-10:25:08, c6b9.bsys.dev.centos.org) Jun 12 09:20:40 node5 libvirtd: 72575: error : virPidFileAcquirePath:410 : Failed to acquire pid file '/var/run/libvirtd.pid': 资源暂时不可用
