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linux服務(wù)器如何調(diào)整分區(qū)大小無損的方法

時間:2024-09-23 15:31:41 學(xué)人智庫 我要投稿
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linux服務(wù)器如何調(diào)整分區(qū)大小無損的方法

  我們做服務(wù)器搭建維護的時候都會因為各種需求而需要調(diào)整分區(qū)大小。為了效率我們肯定要做到無損的調(diào)整,而可能很多不是很熟練的人不知道怎么調(diào),下面小編就為大家分享下linux服務(wù)器無損調(diào)整分區(qū)大小的方法吧。

  情況:

  home:500G

  root:50G

  root分區(qū)不夠用

  思路:把home分區(qū)的空間劃一部分到root分區(qū)

  # 設(shè)置home分區(qū)大小為200G,釋放300G空間

  $ lvreduce -L 200G /dev/centos/home

  # 將空閑空間擴展到root分區(qū)

  $ lvextend -l +100%FREE /dev/centos/root

  # 使用XFS文件系統(tǒng)自帶的命令集增加分區(qū)空間

  $ xfs_growfs /dev/mapper/centos-root

  實例

  situation

  掛載在根目錄的分區(qū) /dev/mapper/centos-root 爆滿,占用100%

  $ df -h

  Filesystem Size Used Avail Use% Mounted on

  /dev/mapper/centos-root 50G 50G 19M 100% /

  devtmpfs 32G 0 32G 0% /dev

  tmpfs 32G 0 32G 0% /dev/shm

  tmpfs 32G 2.5G 29G 8% /run

  tmpfs 32G 0 32G 0% /sys/fs/cgroup

  /dev/mapper/centos-home 476G 33M 476G 1% /home

  /dev/sda1 497M 238M 259M 48% /boot

  tmpfs 6.3G 0 6.3G 0% /run/user/0

  analyze

  掛載在根目錄的分區(qū)空間太小,只有50G,而服務(wù)器 home 目錄為非常用目錄,掛在了近500G的空間。

  思路:從 centos-home 分區(qū)劃出300G空間到 centos-root 分區(qū)。

  operation

  1.查看各分區(qū)信息

  $ lvdisplay

  --- Logical volume ---

  LV Path /dev/centos/home

  LV Name home

  VG Name centos

  LV UUID 1fAt1E-bQsa-1HXR-MCE2-5VZ1-xzBz-iI1SLv

  LV Write Access read/write

  LV Creation host, time localhost, 2016-10-26 17:23:47 +0800

  LV Status available

  # open 0

  LV Size 475.70 GiB

  Current LE 121778

  Segments 1

  Allocation inherit

  Read ahead sectors auto

  - currently set to 256

  Block device 253:2

  --- Logical volume ---

  LV Path /dev/centos/root

  LV Name root

  VG Name centos

  LV UUID lD64zY-yc3Z-SZaB-dAjK-03YM-2gM8-pfj4oo

  LV Write Access read/write

  LV Creation host, time localhost, 2016-10-26 17:23:48 +0800

  LV Status available

  # open 1

  LV Size 50.00 GiB

  Current LE 12800

  Segments 1

  Allocation inherit

  Read ahead sectors auto

  - currently set to 256

  Block device 253:0

  2.減少/home分區(qū)空間

  # 釋放 /dev/centos/home 分區(qū) 300G 的空間

  # 命令設(shè)置 /dev/centos/home 分區(qū) 200G空間

  $ lvreduce -L 200G /dev/centos/home

  WARNING: Reducing active logical volume to 200.00 GiB.

  THIS MAY DESTROY YOUR DATA (filesystem etc.)

  Do you really want to reduce centos/home? [y/n]: y

  Size of logical volume centos/home changed from 475.70 GiB (121778 extents) to 200.00 GiB (51200 extents).

  Logical volume centos/home successfully resized.

  3.增加/root分區(qū)空間

  $ lvextend -l +100%FREE /dev/centos/root

  Size of logical volume centos/root changed from 50.06 GiB (12816 extents) to 325.76 GiB (83394 extents).

  Logical volume centos/root successfully resized.

  4.擴展XFS文件空間大小

  $ xfs_growfs /dev/mapper/centos-root

  meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=3276800 blks

  = sectsz=512 attr=2, projid32bit=1

  = crc=0 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=0

  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 85395456

[linux服務(wù)器如何調(diào)整分區(qū)大小無損的方法]

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