jackyzm

导航

Centos7修改分区空间

一:缩小/home空间

  1.1:备份/home内容

    cp -r /home/* /homebak

  1.2:删除挂载/home

    umount /home

  1.3:删除/home所在lv

    lvremove /dev/mapper/centos-home

  1.4:重新创建home的lv

    lvcreate -L 6G -n home centos

      L表示大小,默认单位为M;n表示卷名;这里的centos是CentOS7安装系统的时候就默认建立好的卷组名

  1.5:文件系统格式为xfs

    mkfs.xfs /dev/mapper/centos-home

  1.6:挂载

    mount /dev/mapper/centos-home /home

 

二:新建卷

  2.1:查看卷组剩余空间

    vgdisplay

[root@zz-01 /]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  8
  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               <79.00 GiB
  PE Size               4.00 MiB
  Total PE              20223
  Alloc PE / Size       15328 / <59.88 GiB
  Free  PE / Size       4895 / 19.12 GiB
  VG UUID               Zdq2BR-i6R3-m43i-cezu-7Eb1-f9cR-aIU0MV

   

  2.2:重新创建xxx的lv

    lvcreate -L 19G -n xxx centos

      L表示大小,默认单位为M;n表示卷名;这里的centos是CentOS7安装系统的时候就默认建立好的卷组名

  2.3:文件系统格式为xfs

    mkfs.ext4 /dev/mapper/centos-xxx

  2.4:挂载

    mount /dev/mapper/centos-xxx /xxx

 

三:TiDB环境部署,2.3开始调整为以下步骤

  3.1:创建分区表:(此步骤我没有做)

    parted -s -a optimal /dev/nvme0n1 mklabel gpt -- mkpart primary ext4 1 -1

  3.2:创建分区并格式化文件系统:

    lvcreate -L 19G -n ext4 centos

    mkfs.ext4 /dev/mapper/centos-ext4

  3.3:查看磁盘分区的UUID

    lsblk -f

[root@zz-01 /]# lsblk -f
NAME            FSTYPE      LABEL           UUID                                   MOUNTPOINT
sr0             iso9660     XenServer Tools 2018-08-24-08-03-46-00                 
xvda                                                                               
├─xvda1         xfs                         37ea57d3-ab8d-4a8f-b89d-c2ccf17bec51   /boot
└─xvda2         LVM2_member                 RNDG3e-7Z6F-xACd-0vro-KM2P-NOc5-CK2M2Z 
  ├─centos-root xfs                         080adf4c-d428-471f-82c9-cd48209e1d08   /
  ├─centos-swap swap                        1b52bb06-5ffa-41bc-86a7-d9ddc7252594   [SWAP]
  ├─centos-home xfs                         7e6acd9f-85e7-4296-8d4c-fcec218d7501   /home
  └─centos-ext4 ext4                        a45530a9-8b07-4b9e-b78b-d6480e239dea

   3.4:vim /etc/fstab 添加

     UUID=a45530a9-8b07-4b9e-b78b-d6480e239dea /ext4 ext4    defaults,nodelalloc,noatime     0 2

  3.5:mkdir /ext4

  3.6:mount -a

  3.7:mount -t ext4

[root@zz-01 /]# mount -t ext4
/dev/mapper/centos-ext4 on /ext4 type ext4 (rw,noatime,nodelalloc,data=ordered)

 

 

感谢:

https://www.cnblogs.com/fang888/p/8124379.html

    

posted on 2019-02-19 17:01  jackyzm  阅读(3068)  评论(0编辑  收藏  举报