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系统磁盘损坏
前提:disk文件为文件存储类型的云主机。
步骤:
1、查看损坏OS云主机所在宿主机 nova show
2、找到或创建一台与损坏云主机OS版本一致的云主机
3、将损坏云主机A的磁盘文件disk拷贝一份至用于修复云主机B disk_bak
ls /var/lib/nova/instances/8a902cdf-2967-48c0-b928-df46544c78d5/disk_bak
-rw-r--r-- 1 root root 36662149120 6月 25 15:29 disk_bak
4、在修云主机B目录下创建xml文件
相关target 信息根据在宿主机查看的实例xml信息变更:virsh dumpxml instance-00021f44
cat attach.xml
<disk type='file' device='disk'>
<driver name='qemu' type='qcow2' cache='none'/>
<source file='/var/lib/nova/instances/8a902cdf-2967-48c0-b928-df46544c78d5/disk_bak'/>
<target dev='vdc' bus='virtio'/>
</disk>
5、加载磁盘
查看实例名称
Virsh list|grep 8a902cdf-2967-48c0-b928-df46544c78d5
通过名称挂载disk
virsh attach-device instance-00008ba9 attach.xml
成功附加设备
6、查看是否挂载成功
在宿主机上查看
virsh dumpxml instance-00008ba9
云主机内查看
fdisk -l
Disk /dev/vda: 21.4 GB, 21474836480 bytes
16 heads, 63 sectors/track, 41610 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/vda1 * 1 407 205127+ 83 Linux
/dev/vda2 408 41610 20766312 83 Linux
Disk /dev/vdb: 1073 MB, 1073741824 bytes
16 heads, 63 sectors/track, 2080 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Disk /dev/vdb doesn't contain a valid partition table
Disk /dev/vdc: 42.9 GB, 42949672960 bytes
16 heads, 63 sectors/track, 83220 cylinders
Units = cylinders of 1008 * 512 = 516096 bytes
Device Boot Start End Blocks Id System
/dev/vdc1 * 1 407 205127+ 83 Linux
/dev/vdc2 408 83220 41737752 83 Linux
7、操作完成后卸载
virsh detach-device instance-00008ba9 attach.xml
成功分离设备
忘记密码(rhel)、修复系统fsck
1、获取uuid nova list --all-tenants --ip ip_addr
2、获取url访问界面 nova get-vnc-console uuid novnc
3、通过界面操作进入单用户模式,修改密码
I版nova stop uuid硬关机
在 icehouse 的版本中,执行 nova stop 时,会直接调用 virsh.destroy 硬关机
http://wiki.libvirt.org/page/FAQ#Why_doesn.27t_.27shutdown.27_seem_to_work.3F
修改源代码让其软关机超时后才执行硬关机解决
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