故障描述：一个客户安装完CentOS7后，然后在CentOS上安装KVM环境，结果在启动libvirtd服务的时候启动不了
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[root@kvm01 ~]
# yum install qemu-kvm qemu-kvm-tools virt-manager libvirt virt-install -y
查看cpu指令是否支持cpu虚拟化：
[root@kvm01 ~]
# egrep '(vmx|svm)' /proc/cpuinfo
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi ept vpid fsgsbase tsc_adjust smep
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi ept vpid fsgsbase tsc_adjust smep
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi ept vpid fsgsbase tsc_adjust smep
flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts mmx fxsr sse sse2 ss ht syscall nx rdtscp lm constant_tsc arch_perfmon pebs bts nopl xtopology tsc_reliable nonstop_tsc aperfmperf pni pclmulqdq vmx ssse3 cx16 pcid sse4_1 sse4_2 x2apic popcnt tsc_deadline_timer aes xsave avx f16c rdrand hypervisor lahf_lm ida arat epb pln pts dtherm tpr_shadow vnmi ept vpid fsgsbase tsc_adjust smep
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查看kvm模块是否被加载
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[root@kvm01 ~]
# lsmod | grep kvm
kvm_intel 148081 0
kvm 461126 1 kvm_intel
[root@kvm01 ~]
# systemctl enable libvirtd.service
[root@kvm01 ~]
# systemctl start libvirtd.service
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启动libvirtd服务，发现出现报错
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[root@kvm01 ~]
# systemctl status -l libvirtd.service
libvirtd.service - Virtualization daemon
Loaded: loaded (
/usr/lib/systemd/system/libvirtd
.service; enabled)
Active: deactivating (final-sigterm) (Result: timeout)
Docs:
man
:libvirtd(8)
http:
//libvirt
.org
Main PID: 3219
CGroup:
/system
.slice
/libvirtd
.service
├─2713
/sbin/dnsmasq
--conf-
file
=
/var/lib/libvirt/dnsmasq/default
.conf --leasefile-ro --dhcp-script=
/usr/libexec/libvirt_leaseshelper
└─2714
/sbin/dnsmasq
--conf-
file
=
/var/lib/libvirt/dnsmasq/default
.conf --leasefile-ro --dhcp-script=
/usr/libexec/libvirt_leaseshelper
2月 22 15:33:56 kvm01 systemd[1]: Stopping Virtualization daemon...
2月 22 15:33:56 kvm01 systemd[1]: Starting Virtualization daemon...
2月 22 15:33:57 kvm01 libvirtd[3219]: libvirt version: 2.0.0, package: 10.el7_3.4 (CentOS BuildSystem <http:
//bugs
.centos.org>, 2017-01-17-23:37:48, c1bm.rdu2.centos.org)
2月 22 15:33:57 kvm01 libvirtd[3219]:
hostname
: kvm01
2月 22 15:33:57 kvm01 libvirtd[3219]: Failed to notify systemd
2月 22 15:33:58 kvm01 dnsmasq[2713]:
read
/etc/hosts
- 4 addresses
2月 22 15:33:58 kvm01 dnsmasq[2713]:
read
/var/lib/libvirt/dnsmasq/default
.addnhosts - 0 addresses
2月 22 15:33:58 kvm01 dnsmasq-dhcp[2713]:
read
/var/lib/libvirt/dnsmasq/default
.hostsfile
2月 22 15:35:26 kvm01 systemd[1]: libvirtd.service operation timed out. Terminating.
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解决方法：
网上google和baidu了很多资料，都没能解决此问题，在日志中也没能找到特别的蛛丝马迹，最后通过安装最新版本的CentOS7.3，重新配置完整后问题，问题解决。有时候人在陷入死胡同的时候，可以换一种思考方式，或许就能够解决问题。
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[root@kvm01 ~]
# systemctl status libvirtd.service
● libvirtd.service - Virtualization daemon
Loaded: loaded (
/usr/lib/systemd/system/libvirtd
.service; enabled; vendor preset: enabled)
Active: active (running) since Thu 2017-02-23 23:22:15 CST; 18min ago
Docs:
man
:libvirtd(8)
http:
//libvirt
.org
Main PID: 4189 (libvirtd)
CGroup:
/system
.slice
/libvirtd
.service
├─2452
/sbin/dnsmasq
--conf-
file
=
/var/lib/libvirt/dnsmasq/default
.conf --leasefile-ro --dhcp-script=
/usr/libexec/libvirt_leaseshelper
├─2453
/sbin/dnsmasq
--conf-
file
=
/var/lib/libvirt/dnsmasq/default
.conf --leasefile-ro --dhcp-script=
/usr/libexec/libvirt_leaseshelper
└─4189
/usr/sbin/libvirtd
Feb 23 23:22:14 kvm01.saltstack.com systemd[1]: Starting Virtualization daemon...
Feb 23 23:22:15 kvm01.saltstack.com systemd[1]: Started Virtualization daemon.
Feb 23 23:22:15 kvm01.saltstack.com dnsmasq[2452]:
read
/etc/hosts
- 2 addresses
Feb 23 23:22:15 kvm01.saltstack.com dnsmasq[2452]:
read
/var/lib/libvirt/dnsmasq/default
.addnhosts - 0 addresses
Feb 23 23:22:15 kvm01.saltstack.com dnsmasq-dhcp[2452]:
read
/var/lib/libvirt/dnsmasq/default
.hostsfile
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本文转自 冰冻vs西瓜 51CTO博客，原文链接：http://blog.51cto.com/molewan/1900743，如需转载请自行联系原作者
