怎样调整XenServer下面Linux虚拟机的磁盘大小

  1. 登录到XenServer。
  2. 修改虚拟机磁盘大小
    修改storage 磁盘大小
  3. 启动虚拟机
  4. 修改分区大小

    Hex code (type L to list codes): 8e
    Changed system type of partition 2 to 8e (Linux LVM)

    Command (m for help): p

    Disk /dev/xvda: 42.9 GB, 42949672960 bytes
    255 heads, 63 sectors/track, 5221 cylinders
    Units = cylinders of 16065 * 512 = 8225280 bytes

        Device Boot      Start         End      Blocks   Id  System
    /dev/xvda1   *           1          13      104391   83  Linux
    /dev/xvda2              14        5221   41833260   8e  Linux LVM

    Command (m for help): w
    The partition table has been altered!

    Calling ioctl() to re-read partition table.

    WARNING: Re-reading the partition table failed with error 16: Device or resource busy.
    The kernel still uses the old table.
    The new table will be used at the next reboot.
    Syncing disks.
  5. 重启虚拟机:reboot
  6. 调整PV大小
    pvs
      PV         VG         Fmt  Attr PSize  PFree
      /dev/xvda2 VolGroup00 lvm2 a-  19.88G    0

    pvresize -v /dev/xvda2
        Using physical volume(s) on command line
        Archiving volume group "VolGroup00" metadata (seqno 3).
        Resizing physical volume /dev/xvda2 from 636 to 1276 extents.
        Resizing volume "/dev/xvda2" to 83666136 sectors.
        Updating physical volume "/dev/xvda2"
        Creating volume group backup "/etc/lvm/backup/VolGroup00" (seqno 4).
      Physical volume "/dev/xvda2" changed
      1 physical volume(s) resized / 0 physical volume(s) not resized

    pvs
      PV         VG         Fmt  Attr PSize  PFree
      /dev/xvda2 VolGroup00 lvm2 a-  39.88G 20.00G
  7. 调整LV大小
    lvs
      LV       VG         Attr   LSize  Origin Snap%  Move Log Copy%  Convert
      LogVol00 VolGroup00 -wi-ao 17.84G
      LogVol01 VolGroup00 -wi-ao  2.03G

    lvextend -l +100%FREE /dev/VolGroup00/LogVol00
      Extending logical volume LogVol00 to 37.84 GB
      Logical volume LogVol00 successfully resized

    lvs
      LV       VG         Attr   LSize  Origin Snap%  Move Log Copy%  Convert
      LogVol00 VolGroup00 -wi-ao 37.84G
      LogVol01 VolGroup00 -wi-ao  2.03G
  8. 调整分区大小
    df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol00
                         5.7G  4.5G  950M  83% /
    /dev/xvda1             99M   22M   73M  24% /boot
    tmpfs                 2.0G     0  2.0G   0% /dev/shm

    resize2fs /dev/mapper/VolGroup00-LogVol00
    resize2fs 1.39 (29-May-2006)
    Filesystem at /dev/mapper/VolGroup00-LogVol00 is mounted on /; on-line resizing required
    Performing an on-line resize of /dev/mapper/VolGroup00-LogVol00 to 9920512 (4k) blocks.
    The filesystem on /dev/mapper/VolGroup00-LogVol00 is now 9920512 blocks long.

    df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VolGroup00-LogVol00
                           37G  4.5G   31G  13% /
    /dev/xvda1             99M   22M   73M  24% /boot
    tmpfs                 2.0G     0  2.0G   0% /dev/shm
    任务完成
  9. 遇到的问题
    linux系统为centos7 时, 用 resize2fs 命令出现报错 resize2fs: Bad magic number in super-block while trying to open
    xfs_growfs /dev/root_vg/root 用 xfs_growfs 代替命令 resize2fs

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