[Linux] 调整服务器磁盘分区

系统管理员 2022-12-27 14:10 150阅读 0赞

查看服务器分区情况 df -h   ==> 减少db分区大小，增加/分区大小  
Filesystem            Size  Used Avail Use% Mounted on  
/dev/mapper/VG\_XXX-LV\_ROOT  
                      145G  130G  7.0G  95% /  
/dev/mapper/VG\_XXX-LV\_OPT\_DATA\_DB  
                      193G  271M  183G   1% /opt/xxx/data/db

卸载db分区，并压缩db分区大小(注意:调整后的空间大于已使用的空间)  
\# umount /opt/xxx/data/db

将db分区大小压缩至100G  
\# e2fsck -f /dev/mapper/VG\_XXX-LV\_OPT\_DATA\_DB  
\# resize2fs -p /dev/mapper/VG\_XXX-LV\_OPT\_DATA\_DB 100G  
\# mount /opt/xxx/data/db  
\# lvreduce -L 100G /dev/mapper/VG\_XXX-LV\_OPT\_DATA\_DB

将/分区大小增加92G  
\# lvextend -L +92G /dev/mapper/VG\_XXX-LV\_ROOT  
\# resize2fs -p /dev/mapper/VG\_XXX-LV\_ROOT

过程参考：

[root@xxx ~]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VG_XXX-LV_ROOT
                          145G  130G  7.0G  95% /
    tmpfs                  64G   72K   64G   1% /dev/shm
    /dev/sda1             1.9G   70M  1.8G   4% /boot
    /dev/mapper/VG_XXX-LV_OPT
                          173G  155G   11G  94% /opt
    /dev/mapper/VG_XXX-LV_OPT_DATA_DB
                          193G  271M  183G   1% /opt/xxx/data/db
    /dev/mapper/VG_XXX-LV_OPT_LOGS
                           96G   60M   92G   1% /opt/xxx/logs
    You have mail in /var/spool/mail/root
    [root@xxx ~]#
    [root@xxx ~]# umount /opt/xxx/data/db
    [root@xxx ~]#
    [root@xxx ~]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VG_XXX-LV_ROOT
                          145G  130G  7.0G  95% /
    tmpfs                  64G   72K   64G   1% /dev/shm
    /dev/sda1             1.9G   70M  1.8G   4% /boot
    /dev/mapper/VG_XXX-LV_OPT
                          173G  155G   11G  94% /opt
    /dev/mapper/VG_XXX-LV_OPT_LOGS
                           96G   60M   92G   1% /opt/xxx/logs
    [root@xxx ~]#
    [root@xxx ~]# resize2fs -p /dev/mapper/VG_XXX-LV_OPT_DATA_DB 100G
    resize2fs 1.41.12 (17-May-2010)
    Please run 'e2fsck -f /dev/mapper/VG_XXX-LV_OPT_DATA_DB' first.
    
    [root@xxx ~]# e2fsck -f /dev/mapper/VG_XXX-LV_OPT_DATA_DB
    e2fsck 1.41.12 (17-May-2010)
    Pass 1: Checking inodes, blocks, and sizes
    Pass 2: Checking directory structure
    Pass 3: Checking directory connectivity
    /lost+found not found.  Create<y>? yes
    
    Pass 4: Checking reference counts
    Pass 5: Checking group summary information
    
    /dev/mapper/VG_XXX-LV_OPT_DATA_DB: ***** FILE SYSTEM WAS MODIFIED *****
    /dev/mapper/VG_XXX-LV_OPT_DATA_DB: 502/12804096 files (22.9% non-contiguous), 905533/51200000 blocks
    [root@xxx ~]# resize2fs -p /dev/mapper/VG_XXX-LV_OPT_DATA_DB 100G
    resize2fs 1.41.12 (17-May-2010)
    Resizing the filesystem on /dev/mapper/VG_XXX-LV_OPT_DATA_DB to 26214400 (4k) blocks.
    Begin pass 2 (max = 53057)
    Relocating blocks             XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    Begin pass 3 (max = 1563)
    Scanning inode table          XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    Begin pass 4 (max = 12)
    Updating inode references     XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
    The filesystem on /dev/mapper/VG_XXX-LV_OPT_DATA_DB is now 26214400 blocks long.
    
    [root@xxx ~]#
    [root@xxx ~]# mount /opt/xxx/data/db
    [root@xxx ~]#
    [root@xxx ~]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VG_XXX-LV_ROOT
                          145G  130G  7.0G  95% /
    tmpfs                  64G   72K   64G   1% /dev/shm
    /dev/sda1             1.9G   70M  1.8G   4% /boot
    /dev/mapper/VG_XXX-LV_OPT
                          173G  155G   11G  94% /opt
    /dev/mapper/VG_XXX-LV_OPT_LOGS
                           96G   60M   92G   1% /opt/xxx/logs
    /dev/mapper/VG_XXX-LV_OPT_DATA_DB
                           99G  271M   94G   1% /opt/xxx/data/db
    [root@xxx ~]#
    [root@xxx ~]# lvextend -L +92G /dev/mapper/VG_XXX-LV_ROOT
      Insufficient free space: 23552 extents needed, but only 0 available
    [root@xxx ~]#
    [root@xxx ~]#
    [root@xxx ~]#
    [root@xxx ~]# vgdisplay
      --- Volume group ---
      VG Name               VG_XXX
      System ID
      Format                lvm2
      Metadata Areas        7
      Metadata Sequence No  10
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                7
      Open LV               7
      Max PV                0
      Cur PV                7
      Act PV                7
      VG Size               760.77 GiB
      PE Size               4.00 MiB
      Total PE              253638
      Alloc PE / Size       253638 / 760.77 GiB
      Free  PE / Size       0 / 0
      VG UUID               JGfWv6-lkiX-na7P-tdxo-x0X5-W0Mh-bpsOQM
    
    [root@xxx ~]# lvreduce -L 100G /dev/mapper/VG_XXX-LV_OPT_DATA_DB
      WARNING: Reducing active and open logical volume to 100.00 GiB
      THIS MAY DESTROY YOUR DATA (filesystem etc.)
    Do you really want to reduce LV_OPT_DATA_DB? [y/n]: y
      Size of logical volume VG_XXX/LV_OPT_DATA_DB changed from 195.31 GiB (50000 extents) to 100.00 GiB (25600 extents).
      Logical volume LV_OPT_DATA_DB successfully resized
    [root@xxx ~]#
    [root@xxx ~]# lvextend -L +92G /dev/mapper/VG_XXX-LV_ROOT
      Size of logical volume VG_XXX/LV_ROOT changed from 146.48 GiB (37500 extents) to 238.48 GiB (61052 extents).
      Logical volume LV_ROOT successfully resized
    [root@xxx ~]#
    [root@xxx ~]# resize2fs -p /dev/mapper/VG_XXX-LV_ROOT
    resize2fs 1.41.12 (17-May-2010)
    Filesystem at /dev/mapper/VG_XXX-LV_ROOT is mounted on /; on-line resizing required
    old desc_blocks = 10, new_desc_blocks = 15
    Performing an on-line resize of /dev/mapper/VG_XXX-LV_ROOT to 62517248 (4k) blocks.
    The filesystem on /dev/mapper/VG_XXX-LV_ROOT is now 62517248 blocks long.
    
    [root@xxx ~]#
    [root@xxx ~]# df -h
    Filesystem            Size  Used Avail Use% Mounted on
    /dev/mapper/VG_XXX-LV_ROOT
                          235G  130G   93G  59% /
    tmpfs                  64G   72K   64G   1% /dev/shm
    /dev/sda1             1.9G   70M  1.8G   4% /boot
    /dev/mapper/VG_XXX-LV_OPT
                          173G  155G   11G  94% /opt
    /dev/mapper/VG_XXX-LV_OPT_LOGS
                           96G   60M   92G   1% /opt/xxx/logs
    /dev/mapper/VG_XXX-LV_OPT_DATA_DB
                           99G  271M   94G   1% /opt/xxx/data/db
    [root@xxx ~]#

参考资料:   
Centos/Linux下调整分区大小（以home和根分区为例） https://blog.csdn.net/qq\_33233768/article/details/65437609