centos7 添加lvm磁盘（centos7关机命令）

df -h

fdisk -l

fdisk /dev/sdb

n

p

根据情况整理大小设置起始和终止(这里我敲两个回车，使用所有的空间)

t

L

8e

wq

fdisk -l

pvcreate /dev/sdb1

vgcreate centosvg /dev/sdb1

vgchange -ay centosvg

vgdisplay centosvg | grep "Total PE"

lvcreate -l 2047 centosvg -n lvvar

mkfs.ext4 /dev/centosvg/lvvar

mkdir /new_var

echo '/dev/centosvg/lvvar /new_var ext4 defaults 0 0'>>/etc/fstab

mount -a

df -hal

cd /var

tar cpf - .|(cd /new_var/; tar xvpf -)

cd /

mv /var /old_var

mkdir /var

umount /new_var/

mount /dev/centosvg/lvvar /var

[root@localhost /]# df -l

Filesystem      Size  Used Avail Use% Mounted on

/dev/sda1        14G  3.9G  9.4G  30% /

devtmpfs        741M     0  741M   0% /dev

tmpfs           749M   80K  749M   1% /dev/shm

tmpfs           749M  8.7M  740M   2% /run

tmpfs           749M     0  749M   0% /sys/fs/cgroup

[root@localhost ~]# fdisk -l

Disk /dev/sdb: 8589 MB, 8589934592 bytes, 16777216 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 /dev/sda: 15.4 GB, 15350530048 bytes, 29981504 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: 0x0001ffba

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048    29980671    14989312   83  Linux

[root@localhost ~]# fdisk /dev/sdb

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.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0x02242155.

Command (m for help): n

Partition type:

p   primary (0 primary, 0 extended, 4 free)

e   extended

Select (default p): p

Partition number (1-4, default 1): 1

First sector (2048-16777215, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-16777215, default 16777215):

Using default value 16777215

Partition 1 of type Linux and of size 8 GiB is set

Command (m for help): t

Selected partition 1

Hex code (type L to list all codes): L

0  Empty           24  NEC DOS         81  Minix / old Lin bf  Solaris

1  FAT12           27  Hidden NTFS Win 82  Linux swap / So c1  DRDOS/sec (FAT-

2  XENIX root      39  Plan 9          83  Linux           c4  DRDOS/sec (FAT-

3  XENIX usr       3c  PartitionMagic  84  OS/2 hidden C:  c6  DRDOS/sec (FAT-

4  FAT16 <32M      40  Venix 80286     85  Linux extended  c7  Syrinx

5  Extended        41  PPC PReP Boot   86  NTFS volume set da  Non-FS data

6  FAT16           42  SFS             87  NTFS volume set db  CP/M / CTOS / .

7  HPFS/NTFS/exFAT 4d  QNX4.x          88  Linux plaintext de  Dell Utility

8  AIX             4e  QNX4.x 2nd part 8e  Linux LVM       df  BootIt

9  AIX bootable    4f  QNX4.x 3rd part 93  Amoeba          e1  DOS access

a  OS/2 Boot Manag 50  OnTrack DM      94  Amoeba BBT      e3  DOS R/O

b  W95 FAT32       51  OnTrack DM6 Aux 9f  BSD/OS          e4  SpeedStor

c  W95 FAT32 (LBA) 52  CP/M            a0  IBM Thinkpad hi eb  BeOS fs

e  W95 FAT16 (LBA) 53  OnTrack DM6 Aux a5  FreeBSD         ee  GPT

f  W95 Ext'd (LBA) 54  OnTrackDM6      a6  OpenBSD         ef  EFI (FAT-12/16/

10  OPUS            55  EZ-Drive        a7  NeXTSTEP        f0  Linux/PA-RISC b

11  Hidden FAT12    56  Golden Bow      a8  Darwin UFS      f1  SpeedStor

12  Compaq diagnost 5c  Priam Edisk     a9  NetBSD          f4  SpeedStor

14  Hidden FAT16 <3 61  SpeedStor       ab  Darwin boot     f2  DOS secondary

16  Hidden FAT16    63  GNU HURD or Sys af  HFS / HFS+      fb  VMware VMFS

17  Hidden HPFS/NTF 64  Novell Netware  b7  BSDI fs         fc  VMware VMKCORE

18  AST SmartSleep  65  Novell Netware  b8  BSDI swap       fd  Linux raid auto

1b  Hidden W95 FAT3 70  DiskSecure Mult bb  Boot Wizard hid fe  LANstep

1c  Hidden W95 FAT3 75  PC/IX           be  Solaris boot    ff  BBT

1e  Hidden W95 FAT1 80  Old Minix

Hex code (type L to list all codes): 8e

Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): wq

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@localhost ~]# fdisk -l

Disk /dev/sdb: 8589 MB, 8589934592 bytes, 16777216 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: 0x02242155

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1            2048    16777215     8387584   8e  Linux LVM

Disk /dev/sda: 15.4 GB, 15350530048 bytes, 29981504 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: 0x0001ffba

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048    29980671    14989312   83  Linux

[root@localhost ~]# pvcreate /dev/sdb1

Physical volume "/dev/sdb1" successfully created

[root@localhost ~]# vgcreate centosvg /dev/sdb1

Volume group "centosvg" successfully created

[root@localhost ~]# vgchange -ay centosvg

0 logical volume(s) in volume group "centosvg" now active

[root@localhost ~]# vgdisplay centosvg | grep "Total PE"

Total PE              2047

[root@localhost ~]# lvcreate -l 2047 centosvg -n lvvar

Logical volume "lvvar" created.

[root@localhost ~]# mkfs.ext4 /dev/centosvg/lvvar

mke2fs 1.42.9 (28-Dec-2013)

Filesystem label=

OS type: Linux

Block size=4096 (log=2)

Fragment size=4096 (log=2)

Stride=0 blocks, Stripe width=0 blocks

524288 inodes, 2096128 blocks

104806 blocks (5.00%) reserved for the super user

First data block=0

Maximum filesystem blocks=2147483648

64 block groups

32768 blocks per group, 32768 fragments per group

8192 inodes per group

Superblock backups stored on blocks:

32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632

Allocating group tables: done

Writing inode tables: done

Creating journal (32768 blocks): done

Writing superblocks and filesystem accounting information: done

[root@localhost ~]# mkdir /new_var

[root@localhost ~]# echo '/dev/centosvg/lvvar /new_var ext4 defaults 0 0'>>/etc/fstab

[root@localhost ~]# cat /etc/fstab

#

# /etc/fstab

# Created by anaconda on Mon Jul 27 09:00:45 2015

#

# Accessible filesystems, by reference, are maintained under '/dev/disk'

# See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info

#

UUID=acc32c5f-5cef-43d4-bb4e-1e7e03a08b2e /                       ext4    defaults        1 1

/dev/centosvg/lvvar /new_var ext4 defaults 0 0

[root@localhost ~]# mount -a

[root@localhost ~]# df -hal

Filesystem                  Size  Used Avail Use% Mounted on

rootfs                       14G  3.9G  9.4G  30% /

proc                           0     0     0    - /proc

sysfs                          0     0     0    - /sys

devtmpfs                    741M     0  741M   0% /dev

securityfs                     0     0     0    - /sys/kernel/security

tmpfs                       749M   80K  749M   1% /dev/shm

devpts                         0     0     0    - /dev/pts

tmpfs                       749M  8.7M  740M   2% /run

tmpfs                       749M     0  749M   0% /sys/fs/cgroup

cgroup                         0     0     0    - /sys/fs/cgroup/systemd

pstore                         0     0     0    - /sys/fs/pstore

cgroup                         0     0     0    - /sys/fs/cgroup/cpuset

cgroup                         0     0     0    - /sys/fs/cgroup/cpu,cpuacct

cgroup                         0     0     0    - /sys/fs/cgroup/memory

cgroup                         0     0     0    - /sys/fs/cgroup/devices

cgroup                         0     0     0    - /sys/fs/cgroup/freezer

cgroup                         0     0     0    - /sys/fs/cgroup/net_cls

cgroup                         0     0     0    - /sys/fs/cgroup/blkio

cgroup                         0     0     0    - /sys/fs/cgroup/perf_event

cgroup                         0     0     0    - /sys/fs/cgroup/hugetlb

configfs                       0     0     0    - /sys/kernel/config

/dev/sda1                    14G  3.9G  9.4G  30% /

selinuxfs                      0     0     0    - /sys/fs/selinux

systemd-1                      0     0     0    - /proc/sys/fs/binfmt_misc

hugetlbfs                      0     0     0    - /dev/hugepages

mqueue                         0     0     0    - /dev/mqueue

debugfs                        0     0     0    - /sys/kernel/debug

/dev/mapper/centosvg-lvvar  7.8G   36M  7.3G   1% /new_var

[root@localhost var]# tar cpf - .|(cd /new_var/; tar xvpf -)

[root@localhost var]# cd /

[root@localhost var]# mv /var /old_var

[root@localhost var]# mkdir /var

[root@localhost var]# umount /new_var/

[root@localhost var]# mount /dev/centosvg/lvvar /var

[root@localhost var]# vim /etc/fstab

修改

/dev/centosvg/lvvar /new_var ext4 defaults 0 0

为

/dev/centosvg/lvvar /var ext4 defaults 0 0

添加新硬盘处理过程

fdisk -l

fdisk /dev/sdc

n

p

1

t

8e

pvcreate /dev/sdc1

vgextend centosvg  /dev/sdc1

lvresize -l +4095 /dev/centosvg/lvvar

resize2fs /dev/centosvg/lvvar

[root@localhost ~]# fdisk -l

Disk /dev/sdb: 8589 MB, 8589934592 bytes, 16777216 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: 0x02242155

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1            2048    16777215     8387584   8e  Linux LVM

Disk /dev/sda: 15.4 GB, 15350530048 bytes, 29981504 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: 0x0001ffba

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048    29980671    14989312   83  Linux

Disk /dev/sdc: 17.2 GB, 17179869184 bytes, 33554432 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 /dev/mapper/centosvg-lvvar: 8585 MB, 8585740288 bytes, 16769024 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

[root@localhost ~]# fdisk /dev/sdc

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.

Device does not contain a recognized partition table

Building a new DOS disklabel with disk identifier 0x03dfe0b3.

Command (m for help): n

Partition type:

p   primary (0 primary, 0 extended, 4 free)

e   extended

Select (default p): p

Partition number (1-4, default 1):

First sector (2048-33554431, default 2048):

Using default value 2048

Last sector, +sectors or +size{K,M,G} (2048-33554431, default 33554431):

Using default value 33554431

Partition 1 of type Linux and of size 16 GiB is set

Command (m for help): t

Selected partition 1

Hex code (type L to list all codes): 8e

Changed type of partition 'Linux' to 'Linux LVM'

Command (m for help): wq

The partition table has been altered!

Calling ioctl() to re-read partition table.

Syncing disks.

[root@localhost ~]# fdisk -l

Disk /dev/sdb: 8589 MB, 8589934592 bytes, 16777216 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: 0x02242155

Device Boot      Start         End      Blocks   Id  System

/dev/sdb1            2048    16777215     8387584   8e  Linux LVM

Disk /dev/sda: 15.4 GB, 15350530048 bytes, 29981504 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: 0x0001ffba

Device Boot      Start         End      Blocks   Id  System

/dev/sda1   *        2048    29980671    14989312   83  Linux

Disk /dev/sdc: 17.2 GB, 17179869184 bytes, 33554432 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: 0x03dfe0b3

Device Boot      Start         End      Blocks   Id  System

/dev/sdc1            2048    33554431    16776192   8e  Linux LVM

Disk /dev/mapper/centosvg-lvvar: 8585 MB, 8585740288 bytes, 16769024 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

[root@localhost ~]# pvcreate /dev/sdc1

Physical volume "/dev/sdc1" successfully created

[root@localhost ~]# vgextend centosvg  /dev/sdc1

Volume group "centosvg" successfully extended

[root@localhost ~]# lvresize -l +4095 /dev/centosvg/lvvar

Size of logical volume centosvg/lvvar changed from 8.00 GiB (2047 extents) to 23.99 GiB (6142 extents).

Logical volume lvvar successfully resized

[root@localhost ~]# lvdisplay

--- Logical volume ---

LV Path                /dev/centosvg/lvvar

LV Name                lvvar

VG Name                centosvg

LV UUID                P5MD5F-ihCE-4bZx-Xktb-okid-HP6N-1jNfY4

LV Write Access        read/write

LV Creation host, time localhost.localdomain, 2015-07-28 11:34:09 +0800

LV Status              available

# open                 1

LV Size                23.99 GiB

Current LE             6142

Segments               2

Allocation             inherit

Read ahead sectors     auto

- currently set to     8192

Block device           253:0

[root@localhost ~]# resize2fs /dev/centosvg/lvvar

resize2fs 1.42.9 (28-Dec-2013)

Filesystem at /dev/centosvg/lvvar is mounted on /var; on-line resizing required

old_desc_blocks = 1, new_desc_blocks = 3

The filesystem on /dev/centosvg/lvvar is now 6289408 blocks long.

[root@localhost ~]# df -h

Filesystem                  Size  Used Avail Use% Mounted on

/dev/sda1                    14G  3.6G  9.7G  28% /

devtmpfs                    741M     0  741M   0% /dev

tmpfs                       749M   80K  749M   1% /dev/shm

tmpfs                       749M  8.7M  740M   2% /run

tmpfs                       749M     0  749M   0% /sys/fs/cgroup

/dev/mapper/centosvg-lvvar   24G  322M   23G   2% /var