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Libvirt错误总结

2017年05月09日 虚拟化 暂无评论 阅读 3,265 views 次
摘要:

本文是一些kvm,或者说libvirt的使用过程中出现的一些错误,从网络上收集了大部分结合自已工作中所遇到的情况,应该能解决测试使用中大部分的报错。希望能帮到有需要的人。

此文放在evernote快发霉了,整理一下放出来。

  •  virsh start vm1368544020451 <span id="transmark"></span>

    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:
    root@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 http://comments.gmane.org/gmane.comp.emulators.libvirt/58218

    apt-get install libpcap-dev

    上面的方法好像都没有效果,但是尝试了http://wiki.libvirt.org/page/The_daemon_cannot_be_started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
    http://www.redhat.com/archives/libvir-list/2011-July/msg01219.html

  • 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
    解决办法:

    ln -s /usr/libexec/qemu-kvm /usr/bin/kvm
  • 更多参考:
    http://wiki.libvirt.org/page/Failed_to_connect_to_the_hypervisor
    https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/6.3_Technical_Notes/libvirt.html
    https://access.redhat.com/knowledge/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/App_TCP_Ports.html

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