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  • Linux centos7 增加root分区容量

    #操作前查看磁盘空间大小

    [root@192 /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 6.0G 44G 12% / devtmpfs 2.8G 0 2.8G 0% /dev tmpfs 2.8G 0 2.8G 0% /dev/shm tmpfs 2.8G 9.1M 2.8G 1% /run tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup /dev/mapper/centos-home 967G 33M 967G 1% /home /dev/sda1 1014M 180M 835M 18% /boot tmpfs 568M 4.0K 568M 1% /run/user/42 tmpfs 568M 40K 568M 1% /run/user/0 [root@192 /]# clear #查看 文件内容 [root@192 /]# ls bin boot dev etc home lib lib64 media mnt opt proc root run sbin srv sys tmp usr var

    # 备份 home 分区 [root@192 /]# cp -r /home/ homebak

    # 卸载home 目录 [root@192 /]# umount /home/

    # 查看 文件情况 [root@192 /]# ls bin boot dev etc home homebak lib lib64 media mnt opt proc root run sbin srv sys tmp usr var

    # 删除 home 所在的 lvm逻辑卷 [root@192 /]# lvremove /dev/mapper/centos-home Do you really want to remove active logical volume centos/home? [y/n]: y Logical volume "home" successfully removed

    #增加 root 所在lvm逻辑卷的容量 [root@192 /]# lvextend -L +200G /dev/mapper/centos-root Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to 250.00 GiB (64000 extents). Logical volume centos/root successfully resized. # 同步 root 文件系统 [root@192 /]# xfs_growfs /dev/mapper/centos-root meta-data=/dev/mapper/centos-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 65536000 [root@192 /]#

    #查看文件 容量 [root@192 /]# df -lh Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 250G 6.4G 244G 3% / devtmpfs 2.8G 0 2.8G 0% /dev tmpfs 2.8G 0 2.8G 0% /dev/shm tmpfs 2.8G 9.1M 2.8G 1% /run tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup /dev/sda1 1014M 180M 835M 18% /boot tmpfs 568M 4.0K 568M 1% /run/user/42 tmpfs 568M 56K 568M 1% /run/user/0 [root@192 /]# cd /root [root@192 ~]# df -lh Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 250G 6.4G 244G 3% / devtmpfs 2.8G 0 2.8G 0% /dev tmpfs 2.8G 0 2.8G 0% /dev/shm tmpfs 2.8G 9.1M 2.8G 1% /run tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup /dev/sda1 1014M 180M 835M 18% /boot tmpfs 568M 4.0K 568M 1% /run/user/42 tmpfs 568M 56K 568M 1% /run/user/0

    #重新 创建 home lvm 逻辑卷 可以 vgdisplay 查看剩余空间大小 [root@192 ~]# lvcreate -L 660G -n home centos Logical volume "home" created.

    #创建home 文件系统 [root@192 ~]# mkfs.xfs /dev/centos/home meta-data=/dev/centos/home isize=512 agcount=4, agsize=43253760 blks = sectsz=512 attr=2, projid32bit=1 = crc=1 finobt=0, sparse=0 data = bsize=4096 blocks=173015040, imaxpct=25 = sunit=0 swidth=0 blks naming =version 2 bsize=4096 ascii-ci=0 ftype=1 log =internal log bsize=4096 blocks=84480, version=2 = sectsz=512 sunit=0 blks, lazy-count=1 realtime =none extsz=4096 blocks=0, rtextents=0

    #挂载 home分区 [root@192 ~]# mount /dev/centos/home /home [root@192 ~]# ls anaconda-ks.cfg Desktop Documents Downloads initial-setup-ks.cfg Music Pictures Public Templates Videos [root@192 ~]# cd / [root@192 /]# ls bin boot dev etc home homebak lib lib64 media mnt opt proc root run sbin srv sys tmp usr var

    #将之前备份的文件拷贝回来 [root@192 /]# cp -r /homebak/* /home [root@192 /]# cd /home [root@192 home]# ls postgers [root@192 home]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 250G 6.4G 244G 3% / devtmpfs 2.8G 0 2.8G 0% /dev tmpfs 2.8G 0 2.8G 0% /dev/shm tmpfs 2.8G 9.1M 2.8G 1% /run tmpfs 2.8G 0 2.8G 0% /sys/fs/cgroup /dev/sda1 1014M 180M 835M 18% /boot tmpfs 568M 4.0K 568M 1% /run/user/42 tmpfs 568M 52K 568M 1% /run/user/0 /dev/mapper/centos-home 660G 33M 660G 1% /home [root@192 home]#

    #查看磁盘空间剩余情况

    [root@192 home]# vgdisplay
       --- Volume group ---
       VG Name               centos
       System ID            
       Format                lvm2
       Metadata Areas        1
       Metadata Sequence No  7
       VG Access             read/write
       VG Status             resizable
       MAX LV                0
       Cur LV                3
       Open LV               3
       Max PV                0
       Cur PV                1
       Act PV                1
       VG Size               <1023.00 GiB
       PE Size               4.00 MiB
       Total PE              261887
       Alloc PE / Size       234432 / 915.75 GiB
       Free  PE / Size       27455 / <107.25 GiB
       VG UUID               dhl6Zn-hE2n-ffTU-EsDj-6mYK-lpCD-Hu1JFY
       
    [root@192 home]#

    为人:谦逊、激情、博学、审问、慎思、明辨、 笃行
    学问:纸上得来终觉浅,绝知此事要躬行
    为事:工欲善其事,必先利其器。
    态度:道阻且长,行则将至;行而不辍,未来可期
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  • 原文地址:https://www.cnblogs.com/ios9/p/15758958.html
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