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  • 挂载虚拟机磁盘文件

    挂载虚拟机磁盘文件

    我们想在宿主机上直接查看vm的虚拟机磁盘文件,并读取里面的内容,需要怎么做呢?

    方式一:使用loop 挂载

    通过fdisk -lu 查看镜像中每个分区的偏移量,然后通过loop挂载

    [root@centos images]# cd /var/lib/libvirt/images/
    [root@centos images]# fdisk -lu ubuntu.raw 
    You must set cylinders.
    You can do this from the extra functions menu.
    
    Disk ubuntu.raw: 0 MB, 0 bytes
    255 heads, 63 sectors/track, 0 cylinders, total 0 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk identifier: 0x000ccae5
    
         Device Boot      Start         End      Blocks   Id  System
    ubuntu.raw1   *        2048    38862847    19430400   83  Linux
    Partition 1 has different physical/logical endings:
         phys=(1023, 254, 63) logical=(2419, 25, 38)
    ubuntu.raw2        38864894    40957951     1046529    5  Extended
    Partition 2 has different physical/logical beginnings (non-Linux?):
         phys=(1023, 254, 63) logical=(2419, 58, 6)
    Partition 2 has different physical/logical endings:
         phys=(1023, 254, 63) logical=(2549, 131, 14)
    ubuntu.raw5        38864896    40957951     1046528   82  Linux swap / Solaris
    [root@centos images]# echo $((2048*512))
    1048576
    [root@centos images]# mount -o loop,offset=1048576 ubuntu.raw /image/
    [root@centos images]# umount /image/
    

    方式二:使用kpartx挂载

    基础平台要求是linux环境。
    需要用到的工具: losetup, kpartx, mount

    ##步骤
    # 获取可以挂载的环回设备:
    [root@virtserver ~]# losetup -f
    /dev/loop0
    # 进行块设备挂载:
    losetup /dev/loop0 abc.img
    # 执行块设备的分区映射:
    kpartx -a /dev/loop0
    # 查看映射分区入口:
    ls /dev/mapper/ 
    # 通过fdisk -l查看磁盘情况。找到需要挂载的数据分区。
    # mount分区:
    mount /dev/mapper/vg_lbrhel-lv_root /mnt/  
    

    移除挂载

    去挂载步骤:
    1.umount
    2.kpartx -d
    3.losetup -d
    
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  • 原文地址:https://www.cnblogs.com/yanling-coder/p/11887492.html
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