centos7 磁盘扩容

怼烎@ 2022-10-13 14:57 272阅读 0赞

esxi 创建的虚拟机一个硬盘设置 的是40G 不够用，就直接修改配置为80G，发现系统里还是显示40G

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 1][]

新建

fdisk /dev/sda

![20210707160625402.png][]

[root@localhost ~]# fdisk /dev/sda 
    Welcome to fdisk (util-linux 2.23.2).
    
    Changes will remain in memory only, until you decide to write them.
    Be careful before using the write command.
    
    
    Command (m for help): p
    
    Disk /dev/sda: 85.9 GB, 85899345920 bytes, 167772160 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    I/O size (minimum/optimal): 512 bytes / 512 bytes
    Disk label type: dos
    Disk identifier: 0x000b9b84
    
       Device Boot      Start         End      Blocks   Id  System
    /dev/sda1   *        2048     2099199     1048576   83  Linux
    /dev/sda2         2099200    83886079    40893440   8e  Linux LVM
    
    Command (m for help): n
    Partition type:
       p   primary (2 primary, 0 extended, 2 free)
       e   extended
    Select (default p): p
    Partition number (3,4, default 3): 3
    First sector (83886080-167772159, default 83886080): 
    Using default value 83886080
    Last sector, +sectors or +size{K,M,G} (83886080-167772159, default 167772159): 
    Using default value 167772159
    Partition 3 of type Linux and of size 40 GiB is set
    
    Command (m for help): t
    Partition number (1-3, default 3): 
    Hex code (type L to list all codes): 8e
    Changed type of partition 'Linux' to '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 or after you run partprobe(8) or kpartx(8)
    Syncing disks.

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 2][]

再次查看，多了一个 /dev/sda3

fdisk -l

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 3][]

查看扩容了多少G

[root@localhost ~]# lvs
      LV   VG Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
      root cl -wi-ao---- 35.00g                                                    
      swap cl -wi-ao----  4.00g                                                    
    [root@localhost ~]# vgdisplay
      --- Volume group ---
      VG Name               cl
      System ID             
      Format                lvm2
      Metadata Areas        2
      Metadata Sequence No  4
      VG Access             read/write
      VG Status             resizable
      MAX LV                0
      Cur LV                2
      Open LV               2
      Max PV                0
      Cur PV                2
      Act PV                2
      VG Size               78.99 GiB
      PE Size               4.00 MiB
      Total PE              20222
      Alloc PE / Size       9983 / 39.00 GiB
      Free  PE / Size       10239 / 40.00 GiB
      VG UUID               6o0lkc-HUU9-8hit-shmh-Xi5w-EFv1-Ns1SKI

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 4][]

给磁盘扩容，要比40G少一点点 lvextend -L +39.999999G /dev/mapper/cl-root /dev/sda3

/dev/mapper/cl-root   这个位置根据自己的实际情况填写，df -h可以看到

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 5][]

[root@localhost ~]# lvextend -L +39.9G /dev/mapper/cl-root /dev/sda3
      Rounding size to boundary between physical extents: 39.90 GiB.
      Size of logical volume cl/root changed from 35.00 GiB (8959 extents) to 74.90 GiB (19174 extents).
      Logical volume cl/root successfully resized.

用xfs\_growfs通知系统“/”的容量增加了

[root@localhost ~]# xfs_growfs  /dev/mapper/cl-root
    meta-data=/dev/mapper/cl-root    isize=512    agcount=4, agsize=2293504 blks
             =                       sectsz=512   attr=2, projid32bit=1
             =                       crc=1        finobt=0 spinodes=0
    data     =                       bsize=4096   blocks=9174016, imaxpct=25
             =                       sunit=0      swidth=0 blks
    naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
    log      =internal               bsize=4096   blocks=4479, version=2
             =                       sectsz=512   sunit=0 blks, lazy-count=1
    realtime =none                   extsz=4096   blocks=0, rtextents=0
    data blocks changed from 9174016 to 19634176

df -h 查看是不是扩容成功，原来的40g扩容到了80g

![20210707161442117.png][]

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2p4eWsyMDA3_size_16_color_FFFFFF_t_70 6][]

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[20210707160625402.png]: /images/20221005/499d161c958e47f9af6f0db30cefb948.png
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[20210707161442117.png]: /images/20221005/3a1c2447b9cf4429975c98df0194b1c5.png
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