bellwhl的专栏

虚拟机启动报错：error: Failed to create domain from /home/cloud/test/withoutspice.xmlerror: internal error Process exited while reading console log output: char device redirected to /dev/pts/7kvm: -driv

启动vm报错error: Failed to create domain from NC07848DE9F50_6FADC1.xmlerror: internal error process exited while connecting to monitor: Could not access KVM kernel module: Permission deniedfailed to

命令1.qemu-img rebase -b new_backupimg_path   imgname对比old_backupimg 和new_backupimg的值 ，将差异写入imgname中2.不对比两个backupimg的区别，可以加参数-u3.疑问，改变backupimg后，imgname的virtualsize 还是以前的值，没有跟新的一样确实，old_backup

centos0.启动vm  clc报没有空闲ip  定时任务  crontab -e        */2 * * * * nmap -sP 172.28.25.2-2541.etc/libvirt/libvirtd.conf    unix_sock_group = "libvirt"unix_sock_ro_perms = "0777"unix_sock_rw_

1.使用物理机光驱2.使用iso安装hvm

ssh到服务主机，libvirtd -d -t 1出错，且/var/log/libvirt/libvirt.log没有错误信息发现由于ssh的原主机端使用的locale语言环境是中文的参考http://blog.sina.com.cn/s/blog_63f5fcf801016xq9.html在/etc/profile 或者/root/.bashrc上添加export L

xp  xp_snap1  xp_snap2 xp_snap3  xp_new镜像xp_new与xp的关系如上，左依次为右的backing file如要删除xp_snap2时，(即关系变为xp  xp_snap1 xp_snap3 xp_new)先用qemu-img commit xp_snap2 命令将xp_snap2的内容commit到xp_snap1再将xp_snap3的

https://www.nnbfn.net/2011/03/convert-kvm-qcow2-to-lvm-raw-partition/1.将qcow2 转成raw格式qemu-img convert disk0.qcow2 -O raw disk0.raw2.查看新raw文件大小user@example:/tmp/disk.nnbfn.net$ ls -l