Libvirt错误总结

liuzhijun.iteye.com/blog/1783698

此文放在evernote快发霉了，整理一下放出来。

virsh start vm1368544020451

 error: Failed to start domain vm1368544020451

error: internal error process exited while connecting to monitor: kvm: -drive file=/dev/sp1368155439693/v1368544020461,if=none,id=drive-virtio-disk0,format=qcow2: could not open disk image /dev/sp1368155439693/v1368544020461: Invalid argument

 

镜像格式错误，用qemu-img info 检查镜像和xml配置文件中指定的type是否一致。

 启动虚拟机错误：

lzjun@lzjun-ubuntu:/opt/vm$ sudo virsh start vm0

error: Failed to start domain vm0
error: internal error process exited while connecting to monitor: Could not access KVM kernel module: No such file or directory
failed to initialize KVM: No such file or directory
No accelerator found!

 

上面的提示信息就是因为QEMU在初始化阶段因为无法找到kvm内核模块。

sudo modprobe kvm   #载入指定的模块

重启电脑，进入bios界面，设置advance选项里面的virtualization标签为Enabled

通过命令 lsmod | grep kvm    #显示已载入的模块

 虚拟机迁移：

# virsh migrate --live 1 qemu+tcp://192.168.0.121 --p2p --tunnelled --unsafe 

error: operation failed: Failed to connect to remote libvirt URI qemu+tcp://192.168.0.121（在URI后面加上/system，‘system’相当于root用户的访问权限)

#virsh migrate --live 2 qemu+tcp://192.168.0.121/system --p2p --tunnelled

 error: Unsafe migration: Migration may lead to data corruption if disks use cache != none（加上--unsafe参数）

#virsh migrate --live 2 qemu+tcp://192.168.0.121/system --p2p --tunnelled --unsafe 

error: Timed out during operation: cannot acquire state change lock (启动虚拟机有时也会遇此错误）,需要重启libvirtd进程

 #virsh

error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Connection refused(libvirtd 进程没有启动，libvirtd是一个监听客户端请求的进程）

$ virsh -c qemu:///system list
error: Failed to connect socket to '/var/run/libvirt/libvirt-sock': Permission denied
error: failed to connect to the hypervisor

（当前用户没有权限，修改/etc/libvirt/libvirtd.conf,unix_sock_rw_perms = 0777,使所有用户都有权限读写）

 

启动libvirtd进程出错

： /usr/local/sbin/libvirtd -d -l --config /usr/local/etc/libvirt/libvirtd.conf （编译安装的启动方式）

error：/usr/local/sbin/libvirtd: initialization failed

try to install libpcap-devel RPM and rebuild libvirt  

apt-get install libpcap-dev

上面的方法好像都没有效果，但是尝试了说的，把配置文件里的

listen_tls = 0注释取消（更奇怪的问题，在我的客户端链接不对）

 

启动虚拟机：Connection reset by peer

virsh start vm1355991767186
error: Failed to start domain vm1355991767186
error: Unable to read from monitor: Connection reset by peer

 还有可能是这样提示：

error: internal error process exited while connecting to monitor: Failed to allocate 16332619776 B: Cannot allocate memory

这个问题可能是因为为VM分配的内存过大（甚至超过的物理主机的内存大小）

 

Unable to load library 'virt': libvirt.so: cannot open shared object file: No such file or directory

linux 环境：

     ln -s /usr/lib/libvirt.so.0   /usr/lib/libvirt.so

windows 环境

     将libvirt-0.dll改名为virt.dll

  

# virsh undefine vm1354695894990
error: Refusing to undefine while domain managed save image exists

 managedsave

解决办法：virsh undefine $domain  --managed-save

 

在centos下面Define虚拟机时，确实没有/usr/bin/kvm，加软链接

error: Failed to define domain from xxx.xml

error: Cannot find QEMU binary /usr/bin/kvm: No such file or directory

ln -s /usr/libexec/qemu-kvm /usr/bin/kvm

 

解决办法：ln -s /usr/libexec/qemu-kvm /usr/bin/kvm

 

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