LVM扩容根分区

LVM的工作方式 　　 　　

LVM管理工具集

[root@wendang ~]# lsblk

NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sda               8:0    0   50G  0 disk

├─sda1            8:1    0    1G  0 part /boot

├─sda2            8:2    0   15G  0 part

│ ├─centos-root 253:0    0 13.4G  0 lvm  /

│ └─centos-swap 253:1    0  1.6G  0 lvm  [SWAP]

└─sda3            8:3    0   10G  0 part

sr0              11:0    1 1024M  0 rom 

[root@wendang ~]#  pvcreate /dev/sda3

  Physical volume "/dev/sda3" successfully created.

[root@wendang ~]# vgs

  VG     #PV #LV #SN Attr   VSize   VFree

  centos   1   2   0 wz--n- <15.00g    0

[root@wendang ~]# vgextend centos /dev/sda3

  Volume group "centos" successfully extended

[root@wendang ~]#  vgs

  VG     #PV #LV #SN Attr   VSize  VFree 

  centos   2   2   0 wz--n- 24.99g <10.00g

[root@wendang ~]# lvs

  LV   VG     Attr       LSize  Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert

  root centos -wi-ao---- 13.39g                                                   

  swap centos -wi-ao----  1.60g                                                   

[root@wendang ~]# df -h

文件系统                 容量  已用  可用 已用% 挂载点

/dev/mapper/centos-root   14G  1.1G   13G    8% /

devtmpfs                 908M     0  908M    0% /dev

tmpfs                    920M     0  920M    0% /dev/shm

tmpfs                    920M  8.8M  911M    1% /run

tmpfs                    920M     0  920M    0% /sys/fs/cgroup

/dev/sda1               1014M  145M  870M   15% /boot

tmpfs                    184M     0  184M    0% /run/user/0

".

[root@wendang ~]# df -h

文件系统                 容量  已用  可用 已用% 挂载点

/dev/mapper/centos-root   14G  1.1G   13G    8% /

devtmpfs                 908M     0  908M    0% /dev

tmpfs                    920M     0  920M    0% /dev/shm

tmpfs                    920M  8.8M  911M    1% /run

tmpfs                    920M     0  920M    0% /sys/fs/cgroup

/dev/sda1               1014M  145M  870M   15% /boot

tmpfs                    184M     0  184M    0% /run/user/0

[root@wendang ~]#

[root@wendang ~]# lsblk

NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

sda               8:0    0   50G  0 disk

├─sda1            8:1    0    1G  0 part /boot

├─sda2            8:2    0   15G  0 part

│ ├─centos-root 253:0    0 13.4G  0 lvm  /

│ └─centos-swap 253:1    0  1.6G  0 lvm  [SWAP]

└─sda3            8:3    0   10G  0 part

sr0              11:0    1 1024M  0 rom 

[root@wendang ~]# pvdisplay

  --- Physical volume ---

  PV Name               /dev/sda2

  VG Name               centos

  PV Size               <15.00 GiB / not usable 3.00 MiB

  Allocatable           yes (but full)

  PE Size               4.00 MiB

  Total PE              3839

  Free PE               0

  Allocated PE          3839

  PV UUID               mh1zwp-wM9K-iSCl-5fgJ-evDG-d3zZ-AozMWl

  

  --- Physical volume ---

  PV Name               /dev/sda3

  VG Name               centos

  PV Size               10.00 GiB / not usable 4.00 MiB

  Allocatable           yes

  PE Size               4.00 MiB

  Total PE              2559

  Free PE               2559

  Allocated PE          0

  PV UUID               IZJrH3-UswX-QXNe-Twih-oAR5-6cL3-l0LKGI

  

[root@wendang ~]# vgdisplay

  --- Volume group ---

  VG Name               centos

  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               24.99 GiB

  PE Size               4.00 MiB

  Total PE              6398

  Alloc PE / Size       3839 / <15.00 GiB

  Free  PE / Size       2559 / <10.00 GiB

  VG UUID               ZJCdml-lltw-AUau-NBJL-1QH1-2SAn-S5gbUB

  

[root@wendang ~]# lvdisplay

  --- Logical volume ---

  LV Path                /dev/centos/swap

  LV Name                swap

  VG Name                centos

  LV UUID                hp3gdC-nima-jxLh-Be3r-c0dW-6n5S-Whnjfh

  LV Write Access        read/write

  LV Creation host, time wendang, 2019-09-17 00:12:50 +0800

  LV Status              available

  # open                 2

  LV Size                1.60 GiB

  Current LE             410

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     8192

  Block device           253:1

  

  --- Logical volume ---

  LV Path                /dev/centos/root

  LV Name                root

  VG Name                centos

  LV UUID                ZbNoyJ-6c9y-APnh-oxYl-clan-KbQN-qAwqo2

  LV Write Access        read/write

  LV Creation host, time wendang, 2019-09-17 00:12:50 +0800

  LV Status              available

  # open                 1

  LV Size                13.39 GiB

  Current LE             3429

  Segments               1

  Allocation             inherit

  Read ahead sectors     auto

  - currently set to     8192

  Block device           253:0

  

 [root@wendang ~]# lvextend -L +9G /dev/mapper/centos-root

  Size of logical volume centos/root changed from 13.39 GiB (3429 extents) to 22.39 GiB (5733 extents).

  Logical volume centos/root successfully resized.

[root@wendang ~]# xfs_growfs /dev/mapper/centos-root

meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=877824 blks

         =                       sectsz=512   attr=2, projid32bit=1

         =                       crc=1        finobt=0 spinodes=0

data     =                       bsize=4096   blocks=3511296, imaxpct=25

         =                       sunit=0      swidth=0 blks

naming   =version 2              bsize=4096   ascii-ci=0 ftype=1

log      =internal               bsize=4096   blocks=2560, version=2

         =                       sectsz=512   sunit=0 blks, lazy-count=1

realtime =none                   extsz=4096   blocks=0, rtextents=0

data blocks changed from 3511296 to 5870592

[root@wendang ~]# df -h

文件系统                 容量  已用  可用 已用% 挂载点

/dev/mapper/centos-root   23G  1.1G   22G    5% /

devtmpfs                 908M     0  908M    0% /dev

tmpfs                    920M     0  920M    0% /dev/shm

tmpfs                    920M  8.8M  911M    1% /run

tmpfs                    920M     0  920M    0% /sys/fs/cgroup

/dev/sda1               1014M  145M  870M   15% /boot

tmpfs    

               184M     0  184M    0% /run/user/0

以下为纯命令

1. fdisk /dev/sda 分区
2. lsblk                    列出分区
3. partprobe     刷新分区
4. lsblk
5. pvcreate /dev/sda3          创建物理卷
6. vgs                                        查看卷组
7. vgextend centos /dev/sda3     扩展卷组
8. lvs              查看逻辑卷
9. df –h    查看挂载
10. pvdisplay           显示物理卷    
11. vgdisplay        显示卷组
12. lvdisplay          显示逻辑卷
13. lvextend -L +9G /dev/mapper/centos-root            扩展逻辑卷 (若增加的为9G，需要小于9G，是因为PE的大小，可以为8.9G)
14. xfs_growfs /dev/mapper/centos-root              刷新文件系统容量
15. df –h                   确认已经扩容
16. ls
17. pwd

/sbin/fdisk /dev/sda
 partprobe #同步分区表到硬盘
 ls /dev/sda*
 pvcreate /dev/sda3
 vgs
 vgextend centos /dev/sda3
 vgs
 lvs
 df -h
 vgs
 lvextend -L +200G /dev/mapper/centos-root
xfs_growfs /dev/mapper/centos-root #扩容真实大小