2021-07-19 09:31阅读: 321评论: 0推荐: 0

Centos7新加磁盘扩容根分区

df -Th
lsblk
fdisk /dev/sdb
lsblk
pvcreate /dev/sdb1
pvdisplay
vgdisplay
vgextend centos /dev/sdb1
vgdisplay
pvdisplay
lvdisplay
lvextend -l +100%FREE /dev/centos/root
df -Th
xfs_growfs /dev/centos/root
df -Th

实例：

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[root@iser-monitor01 alertmanager]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        50G   15G   36G  29% /
devtmpfs                devtmpfs   16G     0   16G   0% /dev
tmpfs                   tmpfs      16G     0   16G   0% /dev/shm
tmpfs                   tmpfs      16G  8.4M   16G   1% /run
tmpfs                   tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/sda2               xfs      1014M  153M  862M  16% /boot
/dev/sda1               vfat      200M  9.9M  190M   5% /boot/efi
/dev/mapper/centos-opt  xfs        15G   33M   15G   1% /opt
/dev/mapper/centos-home xfs       8.8G   34M  8.8G   1% /home
/dev/mapper/centos-var  xfs        25G  901M   25G   4% /var
tmpfs                   tmpfs     3.2G     0  3.2G   0% /run/user/0
[root@iser-monitor01 alertmanager]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0  100G  0 disk
├─sda1            8:1    0  200M  0 part /boot/efi
├─sda2            8:2    0    1G  0 part /boot
└─sda3            8:3    0 98.8G  0 part
  ├─centos-root 253:0    0   50G  0 lvm  /
  ├─centos-home 253:1    0  8.8G  0 lvm  /home
  ├─centos-var  253:2    0   25G  0 lvm  /var
  └─centos-opt  253:3    0   15G  0 lvm  /opt
sdb               8:16   0 1000G  0 disk
sr0              11:0    1 1024M  0 rom
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# 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 0x47379b16.
 
The device presents a logical sector size that is smaller than
the physical sector size. Aligning to a physical sector (or optimal
I/O) size boundary is recommended, or performance may be impacted.
 
Command (m for help): n
Partition type:
   p   primary (0 primary, 0 extended, 4 free)
   e   extended
Select (default p):
Using default response p
Partition number (1-4, default 1):
First sector (2048-2097151999, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-2097151999, default 2097151999):
Using default value 2097151999
Partition 1 of type Linux and of size 1000 GiB is set
 
Command (m for help): w
The partition table has been altered!
 
Calling ioctl() to re-read partition table.
Syncing disks.
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0  100G  0 disk
├─sda1            8:1    0  200M  0 part /boot/efi
├─sda2            8:2    0    1G  0 part /boot
└─sda3            8:3    0 98.8G  0 part
  ├─centos-root 253:0    0   50G  0 lvm  /
  ├─centos-home 253:1    0  8.8G  0 lvm  /home
  ├─centos-var  253:2    0   25G  0 lvm  /var
  └─centos-opt  253:3    0   15G  0 lvm  /opt
sdb               8:16   0 1000G  0 disk
└─sdb1            8:17   0 1000G  0 part
sr0              11:0    1 1024M  0 rom
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# pvcreate /dev/sdb1
  Physical volume "/dev/sdb1" successfully created.
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               centos
  PV Size               98.80 GiB / not usable 2.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              25293
  Free PE               0
  Allocated PE          25293
  PV UUID               ODqte0-9QiK-RlxG-8xb0-aYvJ-yfHT-KcR865
 
  "/dev/sdb1" is a new physical volume of "<1000.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sdb1
  VG Name
  PV Size               <1000.00 GiB
  Allocatable           NO
  PE Size               0
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               Fv2FF9-TUW9-lZID-NFO3-ukAI-ECh3-mNXtQL
 
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                4
  Open LV               4
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               98.80 GiB
  PE Size               4.00 MiB
  Total PE              25293
  Alloc PE / Size       25293 / 98.80 GiB
  Free  PE / Size       0 / 0
  VG UUID               t7qcU4-pN1v-DaeN-keN1-oWDI-4tLY-epo0Xg
 
[root@iser-monitor01 alertmanager]# vgextend centos /dev/sdb1
  Volume group "centos" successfully extended
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  6
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                4
  Open LV               4
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               1.07 TiB
  PE Size               4.00 MiB
  Total PE              281292
  Alloc PE / Size       25293 / 98.80 GiB
  Free  PE / Size       255999 / <1000.00 GiB
  VG UUID               t7qcU4-pN1v-DaeN-keN1-oWDI-4tLY-epo0Xg
 
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda3
  VG Name               centos
  PV Size               98.80 GiB / not usable 2.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              25293
  Free PE               0
  Allocated PE          25293
  PV UUID               ODqte0-9QiK-RlxG-8xb0-aYvJ-yfHT-KcR865
 
  --- Physical volume ---
  PV Name               /dev/sdb1
  VG Name               centos
  PV Size               <1000.00 GiB / not usable 3.00 MiB
  Allocatable           yes
  PE Size               4.00 MiB
  Total PE              255999
  Free PE               255999
  Allocated PE          0
  PV UUID               Fv2FF9-TUW9-lZID-NFO3-ukAI-ECh3-mNXtQL
 
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/centos/root
  LV Name                root
  VG Name                centos
  LV UUID                gleQmV-qoeH-ZHz3-HSUG-IvDh-a77j-mIMkDn
  LV Write Access        read/write
  LV Creation host, time localhost, 2019-12-19 16:17:52 +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     8192
  Block device           253:0
 
  --- Logical volume ---
  LV Path                /dev/centos/home
  LV Name                home
  VG Name                centos
  LV UUID                V63xl5-dp70-FIlc-rjHm-93nm-LoJz-wWfi36
  LV Write Access        read/write
  LV Creation host, time localhost, 2019-12-19 16:17:55 +0800
  LV Status              available
  # open                 1
  LV Size                8.80 GiB
  Current LE             2253
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:1
 
  --- Logical volume ---
  LV Path                /dev/centos/var
  LV Name                var
  VG Name                centos
  LV UUID                WqXYBN-MpWJ-WuIv-06oh-CDhp-f38c-14W587
  LV Write Access        read/write
  LV Creation host, time localhost, 2019-12-19 16:17:56 +0800
  LV Status              available
  # open                 1
  LV Size                25.00 GiB
  Current LE             6400
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:2
 
  --- Logical volume ---
  LV Path                /dev/centos/opt
  LV Name                opt
  VG Name                centos
  LV UUID                BDLVE6-sYIw-a4yD-Vodu-83Fl-UyAi-sgixFk
  LV Write Access        read/write
  LV Creation host, time localhost, 2019-12-19 16:17:58 +0800
  LV Status              available
  # open                 1
  LV Size                15.00 GiB
  Current LE             3840
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:3
 
[root@iser-monitor01 alertmanager]# lvextend -l +100%FREE /dev/centos/root
  Size of logical volume centos/root changed from 50.00 GiB (12800 extents) to <1.03 TiB (268799 extents).
  Logical volume centos/root successfully resized.
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs        50G   15G   36G  29% /
devtmpfs                devtmpfs   16G     0   16G   0% /dev
tmpfs                   tmpfs      16G     0   16G   0% /dev/shm
tmpfs                   tmpfs      16G  8.4M   16G   1% /run
tmpfs                   tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/sda2               xfs      1014M  153M  862M  16% /boot
/dev/sda1               vfat      200M  9.9M  190M   5% /boot/efi
/dev/mapper/centos-opt  xfs        15G   33M   15G   1% /opt
/dev/mapper/centos-home xfs       8.8G   34M  8.8G   1% /home
/dev/mapper/centos-var  xfs        25G  901M   25G   4% /var
tmpfs                   tmpfs     3.2G     0  3.2G   0% /run/user/0
[root@iser-monitor01 alertmanager]# lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
sda               8:0    0  100G  0 disk
├─sda1            8:1    0  200M  0 part /boot/efi
├─sda2            8:2    0    1G  0 part /boot
└─sda3            8:3    0 98.8G  0 part
  ├─centos-root 253:0    0    1T  0 lvm  /
  ├─centos-home 253:1    0  8.8G  0 lvm  /home
  ├─centos-var  253:2    0   25G  0 lvm  /var
  └─centos-opt  253:3    0   15G  0 lvm  /opt
sdb               8:16   0 1000G  0 disk
└─sdb1            8:17   0 1000G  0 part
  └─centos-root 253:0    0    1T  0 lvm  /
sr0              11:0    1 1024M  0 rom
[root@iser-monitor01 alertmanager]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=3276800 blks
         =                       sectsz=4096  attr=2, projid32bit=1
         =                       crc=1        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=1
log      =internal               bsize=4096   blocks=6400, version=2
         =                       sectsz=4096  sunit=1 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 13107200 to 275250176
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]#
[root@iser-monitor01 alertmanager]# df -Th
Filesystem              Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root xfs       1.1T   15G  1.1T   2% /
devtmpfs                devtmpfs   16G     0   16G   0% /dev
tmpfs                   tmpfs      16G     0   16G   0% /dev/shm
tmpfs                   tmpfs      16G  8.4M   16G   1% /run
tmpfs                   tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/sda2               xfs      1014M  153M  862M  16% /boot
/dev/sda1               vfat      200M  9.9M  190M   5% /boot/efi
/dev/mapper/centos-opt  xfs        15G   33M   15G   1% /opt
/dev/mapper/centos-home xfs       8.8G   34M  8.8G   1% /home
/dev/mapper/centos-var  xfs        25G  901M   25G   4% /var
tmpfs                   tmpfs     3.2G     0  3.2G   0% /run/user/0
[root@iser-monitor01 alertmanager]#