无nbd driver情况下有没有挂载qcow2的方法？

[guodong]

您好，看了您的书很受启发，请问无nbd driver情况下有没有挂载qcow2的方法？我用的centos，centos 7 默认是不带nbd的。

[JiYou]

额，我最新的才用到CentOS 6.5。估计需要在CentOS上找一下qemu-nbd驱动吧。没有试过CentOS上的情况。研究一下。如果你有什么新的进展，麻烦也给我说一下哦。Ubuntu到是很方便的样子。

[JiYou]

看了一下，大概找到方法如下：首先你需要安装如下包：
libguestfs

我的是CentOS 6.5：安装了
libguestfs-tools-c-1.20.11-2.el6.x86_64
libguestfs-1.20.11-2.el6.x86_64
python-libguestfs-1.20.11-2.el6.x86_64

安装好之后，

    guestfish -a centos63_desktop.qcow2 --ro <<_EOF_
    run
    list-filesystems
    _EOF_

比如下面有这个分区：

/dev/vg_centosbase/lv_root

可以查看img里面的分区情况：
接下来，便可以mount。
命令如下;

For example, to mount the root partition from our centos63_desktop.qcow2 image to /mnt, we can do:

guestmount -a centos63_desktop.qcow2 -m /dev/vg_centosbase/lv_root --rw /mnt

[guodong]

感谢您的回复，libguestfs的确是个不错的选择，我也在尝试，不过还没成功，我的虚拟机装的是windows，ntfs文件系统，用libguestfs挂载会报错

[root@localhost ~]# guestfish -a /var/lib/libvirt/images/win8.1.qcow2 -i
libguestfs: trace: set_verbose true
libguestfs: trace: set_verbose = 0
libguestfs: create: flags = 0, handle = 0x7fb67a560d40, program = guestfish
libguestfs: trace: set_pgroup true
libguestfs: trace: set_pgroup = 0
libguestfs: trace: add_drive "/var/lib/libvirt/images/win8.1.qcow2"
libguestfs: trace: add_drive = 0
libguestfs: trace: is_config
libguestfs: trace: is_config = 1
libguestfs: trace: launch
libguestfs: trace: get_tmpdir
libguestfs: trace: get_tmpdir = "/mnt"
libguestfs: trace: get_backend
libguestfs: trace: get_backend = "libvirt"
libguestfs: launch: backend=libvirt
libguestfs: launch: tmpdir=/mnt/libguestfsFEVfFH
libguestfs: launch: umask=0022
libguestfs: launch: euid=0
libguestfs: libvirt version = 1001001 (1.1.1)
libguestfs: [00000ms] connect to libvirt
libguestfs: opening libvirt handle: URI = NULL, auth = virConnectAuthPtrDefault, flags = 0
libguestfs: successfully opened libvirt handle: conn = 0x7fb67a5623a0
libguestfs: [00009ms] get libvirt capabilities
libguestfs: [00018ms] parsing capabilities XML
libguestfs: [00019ms] build appliance
libguestfs: command: run: supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ -f checksum
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ x86_64
supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64, kernel = (null), initrd = (null), appliance = (null)
supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d
checking modpath /lib/modules/3.10.0-123.el7.x86_64 is a directory
checking modpath /lib/modules/3.10.0-123.8.1.el7.x86_64 is a directory
picked vmlinuz-3.10.0-123.el7.x86_64
supermin helper [00000ms] finished creating kernel
supermin helper [00000ms] visiting /usr/lib64/guestfs/supermin.d
supermin helper [00001ms] visiting /usr/lib64/guestfs/supermin.d/base.img.gz
supermin helper [00001ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img.gz
supermin helper [00001ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
supermin helper [00036ms] visiting /usr/lib64/guestfs/supermin.d/init.img
supermin helper [00036ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.hostfiles
supermin helper [00036ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.img
supermin helper [00036ms] visiting /usr/lib64/guestfs/supermin.d/udev-rules.img
supermin helper [00036ms] adding kernel modules
supermin helper [00065ms] finished creating appliance
libguestfs: checksum of existing appliance: f1e42ac7dbc482bca1bd582f9ac8725ba3e064454b30b68f032e7998118a8c3c
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/mnt"
libguestfs: trace: get_cachedir
libguestfs: trace: get_cachedir = "/mnt"
libguestfs: [00091ms] begin building supermin appliance
libguestfs: [00091ms] run supermin-helper
libguestfs: command: run: supermin-helper
libguestfs: command: run: \ --verbose
libguestfs: command: run: \ --copy-kernel
libguestfs: command: run: \ -f ext2
libguestfs: command: run: \ /usr/lib64/guestfs/supermin.d
libguestfs: command: run: \ x86_64
libguestfs: command: run: \ /mnt/guestfs.hr5Q9G/kernel
libguestfs: command: run: \ /mnt/guestfs.hr5Q9G/initrd
libguestfs: command: run: \ /mnt/guestfs.hr5Q9G/root
supermin helper [00000ms] whitelist = (not specified), host_cpu = x86_64, kernel = /mnt/guestfs.hr5Q9G/kernel, initrd = /mnt/guestfs.hr5Q9G/initrd, appliance = /mnt/guestfs.hr5Q9G/root
supermin helper [00000ms] inputs[0] = /usr/lib64/guestfs/supermin.d
checking modpath /lib/modules/3.10.0-123.el7.x86_64 is a directory
checking modpath /lib/modules/3.10.0-123.8.1.el7.x86_64 is a directory
picked vmlinuz-3.10.0-123.el7.x86_64
supermin helper [00008ms] finished creating kernel
supermin helper [01123ms] finished mke2fs
supermin helper [01125ms] visiting /usr/lib64/guestfs/supermin.d
supermin helper [01125ms] visiting /usr/lib64/guestfs/supermin.d/base.img.gz
supermin helper [04521ms] visiting /usr/lib64/guestfs/supermin.d/daemon.img.gz
supermin helper [04541ms] visiting /usr/lib64/guestfs/supermin.d/hostfiles
supermin helper [09935ms] visiting /usr/lib64/guestfs/supermin.d/init.img
supermin helper [09937ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.hostfiles
supermin helper [09946ms] visiting /usr/lib64/guestfs/supermin.d/ntfs.img
supermin-helper: ext2fs_read_inode: Illegal inode number
libguestfs: error: supermin-helper exited with error status 1, see debug messages above
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /mnt/guestfs.hr5Q9G
libguestfs: trace: launch = -1 (error)
libguestfs: trace: close
libguestfs: closing guestfs handle 0x7fb67a560d40 (state 0)
libguestfs: command: run: rm
libguestfs: command: run: \ -rf /mnt/libguestfsFEVfFH

看样子是倒数第10行supermin-helper: ext2fs_read_inode: Illegal inode number的报错信息导致supermin-helper出错，不知道您有没有这样的问题？