1. 查看现有磁盘信息，可以看出根分区有96G
[root@localhost ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   96G  2.0G   94G   3% /
devtmpfs                 2.0G     0  2.0G   0% /dev
tmpfs                    2.0G     0  2.0G   0% /dev/shm
tmpfs                    2.0G  8.5M  2.0G   1% /run
tmpfs                    2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1               1014M  163M  852M  17% /boot
tmpfs                    396M     0  396M   0% /run/user/0
  1. 查看新增加的磁盘信息
  • fdisk
[root@localhost ~]# fdisk -lDisk /dev/sda: 500.4 GB, 500363689984 bytes, 977272832 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: 0x0009051fDevice Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   209715199   103808000   8e  Linux LVMDisk /dev/mapper/centos-root: 102.1 GB, 102131302400 bytes, 199475200 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytesDisk /dev/mapper/centos-swap: 4160 MB, 4160749568 bytes, 8126464 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
  • parted
[root@localhost ~]# parted -l
Model: QEMU QEMU HARDDISK (scsi)
Disk /dev/sda: 500GB
Sector size (logical/physical): 512B/512B
Partition Table: msdos
Disk Flags: Number  Start   End     Size    Type     File system  Flags1      1049kB  1075MB  1074MB  primary  xfs          boot2      1075MB  107GB   106GB   primary               lvmModel: Linux device-mapper (linear) (dm)
Disk /dev/mapper/centos-swap: 4161MB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: Number  Start  End     Size    File system     Flags1      0.00B  4161MB  4161MB  linux-swap(v1)Model: Linux device-mapper (linear) (dm)
Disk /dev/mapper/centos-root: 102GB
Sector size (logical/physical): 512B/512B
Partition Table: loop
Disk Flags: Number  Start  End    Size   File system  Flags1      0.00B  102GB  102GB  xfs
  1. 根据以上信息，对新增加的磁盘进行分区
[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): m
Command actiona   toggle a bootable flagb   edit bsd disklabelc   toggle the dos compatibility flagd   delete a partitiong   create a new empty GPT partition tableG   create an IRIX (SGI) partition tablel   list known partition typesm   print this menun   add a new partitiono   create a new empty DOS partition tablep   print the partition tableq   quit without saving changess   create a new empty Sun disklabelt   change a partition's system idu   change display/entry unitsv   verify the partition tablew   write table to disk and exitx   extra functionality (experts only)Command (m for help): pDisk /dev/sda: 500.4 GB, 500363689984 bytes, 977272832 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: 0x0009051fDevice Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   209715199   103808000   8e  Linux LVMCommand (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):
First sector (209715200-977272831, default 209715200):
Using default value 209715200
Last sector, +sectors or +size{K,M,G} (209715200-977272831, default 977272831):
Using default value 977272831
Partition 3 of type Linux and of size 366 GiB is setCommand (m for help): t
Partition number (1-3, default 3):
Hex code (type L to list all codes): L0  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): pDisk /dev/sda: 500.4 GB, 500363689984 bytes, 977272832 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: 0x0009051fDevice Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200   209715199   103808000   8e  Linux LVM
/dev/sda3       209715200   977272831   383778816   8e  Linux LVMCommand (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.

重启系统后，登陆系统。（一定要重启系统，否则可能无法继续下面的操作扩充新分区）

同时在进行下一步之前，说明一下pv、vg、lv的关系。

一个硬盘f分区组成一个pv（物理卷）
一个或者多个pv组成一个vg（卷组）
一个vg可以划分出多个lv（逻辑卷）

  1. 查看物理卷
[root@localhost ~]# lvsLV   VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convertroot centos -wi-ao---- <95.12g                                                    swap centos -wi-ao----  <3.88g
  1. 创建物理卷
  • 格式化分区（非必需，先格式化后面创建物理卷还是会擦除）
# 查看系统的文件类型
[root@localhost ~]# df -T
Filesystem              Type     1K-blocks    Used Available Use% Mounted on
/dev/mapper/centos-root xfs       99688900 2028996  97659904   3% /
devtmpfs                devtmpfs   2010736       0   2010736   0% /dev
tmpfs                   tmpfs      2022628       0   2022628   0% /dev/shm
tmpfs                   tmpfs      2022628    8676   2013952   1% /run
tmpfs                   tmpfs      2022628       0   2022628   0% /sys/fs/cgroup
/dev/sda1               xfs        1038336  166632    871704  17% /boot
tmpfs                   tmpfs       404528       0    404528   0% /run/user/0# 格式化为xfs
[root@localhost ~]# mkfs.xfs /dev/sda3
meta-data=/dev/sda3              isize=512    agcount=4, agsize=23986176 blks=                       sectsz=512   attr=2, projid32bit=1=                       crc=1        finobt=0, sparse=0
data     =                       bsize=4096   blocks=95944704, imaxpct=25=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal log           bsize=4096   blocks=46848, version=2=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
  • 创建物理卷
[root@localhost ~]# pvcreate /dev/sda3
WARNING: xfs signature detected on /dev/sda3 at offset 0. Wipe it? [y/n]: yWiping xfs signature on /dev/sda3.Physical volume "/dev/sda3" successfully created.
  1. 查看物理卷信息
[root@localhost ~]# pvdisplay --- Physical volume ---PV Name               /dev/sda2VG Name               centosPV Size               <99.00 GiB / not usable 3.00 MiBAllocatable           yes PE Size               4.00 MiBTotal PE              25343Free PE               1Allocated PE          25342PV UUID               00mdqs-YJl2-Oq3k-OlGb-7mbi-iTtz-HJl7cw"/dev/sda3" is a new physical volume of "366.00 GiB"--- NEW Physical volume ---PV Name               /dev/sda3VG Name               PV Size               366.00 GiBAllocatable           NOPE Size               0   Total PE              0Free PE               0Allocated PE          0PV UUID               6PYry3-VIRi-7DUc-5erS-yCEo-Laxu-ZkoYPo[root@localhost ~]# vgdisplay --- Volume group ---VG Name               centosSystem ID             Format                lvm2Metadata Areas        1Metadata Sequence No  3VG Access             read/writeVG Status             resizableMAX LV                0Cur LV                2Open LV               2Max PV                0Cur PV                1Act PV                1VG Size               <99.00 GiBPE Size               4.00 MiBTotal PE              25343Alloc PE / Size       25342 / 98.99 GiBFree  PE / Size       1 / 4.00 MiBVG UUID               yde5y3-OOS3-UmyT-iHwv-zwJ5-yE63-9ZHI9O
  1. 将新增加的分区 /dev/sda3 加入到根目录分区中，也就是上面的VG Name: centos
[root@localhost ~]# vgextend centos /dev/sda3Volume group "centos" successfully extended
  1. 重新查看卷组信息
[root@localhost ~]# vgdisplay --- Volume group ---VG Name               centosSystem ID             Format                lvm2Metadata Areas        2Metadata Sequence No  4VG Access             read/writeVG Status             resizableMAX LV                0Cur LV                2Open LV               2Max PV                0Cur PV                2Act PV                2VG Size               464.99 GiBPE Size               4.00 MiBTotal PE              119038Alloc PE / Size       25342 / 98.99 GiBFree  PE / Size       93696 / 366.00 GiBVG UUID               yde5y3-OOS3-UmyT-iHwv-zwJ5-yE63-9ZHI9O
  1. 进行卷扩容
  • 扩容前
[root@localhost ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   96G  2.0G   94G   3% /
devtmpfs                 2.0G     0  2.0G   0% /dev
tmpfs                    2.0G     0  2.0G   0% /dev/shm
tmpfs                    2.0G  8.5M  2.0G   1% /run
tmpfs                    2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1               1014M  163M  852M  17% /boot
tmpfs                    396M     0  396M   0% /run/user/0
  • 进行卷扩容
[root@localhost ~]# lvextend -l +100%FREE /dev/mapper/centos-rootSize of logical volume centos/root changed from <95.12 GiB (24350 extents) to <461.12 GiB (118046 extents).Logical volume centos/root successfully resized.
  1. 调整卷分区大小
[root@localhost ~]# xfs_growfs /dev/mapper/centos-root
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=6233600 blks=                       sectsz=512   attr=2, projid32bit=1=                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=24934400, imaxpct=25=                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=12175, version=2=                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 24934400 to 120879104
  1. 最后，查看磁盘信息可以看出根目录分区大小已成功扩容。
[root@localhost ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root  462G  2.0G  460G   1% /
devtmpfs                 2.0G     0  2.0G   0% /dev
tmpfs                    2.0G     0  2.0G   0% /dev/shm
tmpfs                    2.0G  8.5M  2.0G   1% /run
tmpfs                    2.0G     0  2.0G   0% /sys/fs/cgroup
/dev/sda1               1014M  163M  852M  17% /boot
tmpfs                    396M     0  396M   0% /run/user/0

转载于:https://www.cnblogs.com/lokion/p/10998317.html

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