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  • centos7上修改lv逻辑卷的大小

    author:headsen  chen

    date: 2019-03-18 15:24:22

    自动化修改分区的脚本

    umount /home
    # 交互式执行shell命令
    echo 'y' |lvremove /dev/mapper/centos-home
    lvextend -L +140G /dev/mapper/centos-root 
    xfs_growfs /dev/mapper/centos-root 
    lvcreate -L 1G -n home centos
    mkfs.xfs /dev/mapper/centos-home
    mount /dev/mapper/centos-home /home
    df -h


    # 必须是lvs的硬盘分区模式,centos-home 是lv的名称,centos是vg的名称,

    1,查看

    [root@localhost mnt]# df -h
    Filesystem           Size  Used Avail Use% Mounted on
    /dev/mapper/cl-root   50G   12G   39G  23% /
    devtmpfs             1.9G     0  1.9G   0% /dev
    tmpfs                1.9G     0  1.9G   0% /dev/shm
    tmpfs                1.9G  8.6M  1.9G   1% /run
    tmpfs                1.9G     0  1.9G   0% /sys/fs/cgroup
    /dev/sda1           1014M  139M  876M  14% /boot
    /dev/mapper/cl-home   66G   33M   66G   1% /home
    tmpfs                378M     0  378M   0% /run/user/0

    [root@localhost mnt]# lvs
      LV   VG Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
      home cl -wi-a----- 65.12g                                                    
      root cl -wi-ao---- 50.00g                                                    
      swap cl -wi-ao----  3.88g      

    卸载/home 分区

    [root@localhost mnt]# umount /home

    删除home的lv分区

    [root@localhost mnt]# lvremove /dev/mapper/cl-home
    Do you really want to remove active logical volume cl/home? [y/n]: y
      Logical volume "home" successfully removed

    增加root所在的 / 分区并更新文件系统

    [root@localhost mnt]# lvextend -L +60G /dev/mapper/cl-root
      Size of logical volume cl/root changed from 50.00 GiB (12800 extents) to 110.00 GiB (28160 extents).
      Logical volume cl/root successfully resized.

    [root@localhost ~]# xfs_growfs /dev/mapper/cl-root
    meta-data=/dev/mapper/cl-root    isize=512    agcount=4, agsize=3276800 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=0 spinodes=0
    data     =                       bsize=4096   blocks=13107200, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
    log      =internal               bsize=4096   blocks=6400, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    data blocks changed from 13107200 to 28835840

    创建/home分区,并设置大小为5G

    [root@localhost mnt]# lvcreate -L 5G -n home cl
      Logical volume "home" created.
    
    [root@localhost mnt]# mkfs.xfs /dev/mapper/cl-home
    meta-data=/dev/mapper/cl-home    isize=512    agcount=4, agsize=327680 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=0, sparse=0
    data     =                       bsize=4096   blocks=1310720, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
    log      =internal log           bsize=4096   blocks=2560, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0

    挂载并查看

    [root@localhost mnt]# mount /dev/mapper/cl-home /home
    [root@localhost mnt]# df -h
    Filesystem           Size  Used Avail Use% Mounted on
    /dev/mapper/cl-root  110G   12G   99G  11% /
    devtmpfs             1.9G     0  1.9G   0% /dev
    tmpfs                1.9G     0  1.9G   0% /dev/shm
    tmpfs                1.9G  8.6M  1.9G   1% /run
    tmpfs                1.9G     0  1.9G   0% /sys/fs/cgroup
    /dev/sda1           1014M  139M  876M  14% /boot
    tmpfs                378M     0  378M   0% /run/user/0
    /dev/mapper/cl-home  5.0G   33M  5.0G   1% /home
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  • 原文地址:https://www.cnblogs.com/kaishirenshi/p/10552437.html
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