CentOS7虚拟机磁盘扩容

新建逻辑分区,识别逻辑分区,创建物理分区,扩展卷组,扩展目标分区。

点击查看代码
<-- 删除了一些错误书写  -->
[root@master ~]# fdisk -l

磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x000a2638

   设备 Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    41943039    19921920   8e  Linux LVM

磁盘 /dev/mapper/centos-root:18.2 GB, 18249416704 字节,35643392 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节


磁盘 /dev/mapper/centos-swap:2147 MB, 2147483648 字节,4194304 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节

[root@master ~]# fdisk /dev/sda     //新建逻辑分区
欢迎使用 fdisk (util-linux 2.23.2)。

更改将停留在内存中,直到您决定将更改写入磁盘。
使用写入命令前请三思。


命令(输入 m 获取帮助):n
Partition type:
   p   primary (2 primary, 0 extended, 2 free)
   e   extended
Select (default p): 
Using default response p
分区号 (3,4,默认 3):
起始 扇区 (41943040-104857599,默认为 41943040):
将使用默认值 41943040
Last 扇区, +扇区 or +size{K,M,G} (41943040-104857599,默认为 104857599):+10G  
分区 3 已设置为 Linux 类型,大小设为 10 GiB

命令(输入 m 获取帮助):p

磁盘 /dev/sda:53.7 GB, 53687091200 字节,104857600 个扇区
Units = 扇区 of 1 * 512 = 512 bytes
扇区大小(逻辑/物理):512 字节 / 512 字节
I/O 大小(最小/最佳):512 字节 / 512 字节
磁盘标签类型:dos
磁盘标识符:0x000a2638

   设备 Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    41943039    19921920   8e  Linux LVM
/dev/sda3        41943040    62914559    10485760   83  Linux

命令(输入 m 获取帮助):w
The partition table has been altered!

Calling ioctl() to re-read partition table.

WARNING: Re-reading the partition table failed with error 16: 设备或资源忙.
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)
正在同步磁盘。
[root@master ~]# partprobe                       //识别
[root@master ~]# pvcreate /dev/sda3     //创建物理分区
  Physical volume "/dev/sda3" successfully created.
[root@master ~]# pvdisplay
  --- Physical volume ---
  PV Name               /dev/sda2
  VG Name               centos
  PV Size               <19.00 GiB / not usable 3.00 MiB
  Allocatable           yes (but full)
  PE Size               4.00 MiB
  Total PE              4863
  Free PE               0
  Allocated PE          4863
  PV UUID               1qy9k5-Hcqs-I069-jA2R-Dx1L-Y63Y-2Ll6AF
   
  "/dev/sda3" is a new physical volume of "10.00 GiB"
  --- NEW Physical volume ---
  PV Name               /dev/sda3
  VG Name               
  PV Size               10.00 GiB
  Allocatable           NO
  PE Size               0   
  Total PE              0
  Free PE               0
  Allocated PE          0
  PV UUID               LuOKWS-aycL-2evL-0cHa-o42G-jjvG-4r1szh
   
[root@master ~]# vgdisplay
  --- Volume group ---
  VG Name               centos
  System ID             
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               2
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               <19.00 GiB
  PE Size               4.00 MiB
  Total PE              4863
  Alloc PE / Size       4863 / <19.00 GiB
  Free  PE / Size       0 / 0   
  VG UUID               us2RqC-XUJF-xAgc-iL8v-SE6J-6Hnh-beoh71
   
[root@master ~]# vgextend centos /dev/sda3     //扩展卷组
  Volume group "centos" successfully extended
[root@master ~]# vgdisplay                                     //查看卷组
  --- 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               28.99 GiB
  PE Size               4.00 MiB
  Total PE              7422
  Alloc PE / Size       4863 / <19.00 GiB
  Free  PE / Size       2559 / <10.00 GiB
  VG UUID               us2RqC-XUJF-xAgc-iL8v-SE6J-6Hnh-beoh71
   
[root@master ~]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 893M     0  893M    0% /dev
tmpfs                    910M     0  910M    0% /dev/shm
tmpfs                    910M  9.9M  900M    2% /run
tmpfs                    910M     0  910M    0% /sys/fs/cgroup
/dev/mapper/centos-root   17G   17G  677M   97% /
/dev/sda1               1014M  351M  664M   35% /boot
tmpfs                    182M     0  182M    0% /run/user/0
[root@master ~]# lvresize -L +10G /dev/mapper/centos-root        
  Insufficient free space: 2560 extents needed, but only 2559 available
[root@master ~]# lvresize -L +9G /dev/mapper/centos-root         //扩展根分区大小
  Size of logical volume centos/root changed from <17.00 GiB (4351 extents) to <26.00 GiB (6655 extents).
  Logical volume centos/root successfully resized.
[root@master ~]# df -T
文件系统                类型        1K-块     已用   可用 已用% 挂载点
devtmpfs                devtmpfs   914384        0 914384    0% /dev
tmpfs                   tmpfs      931404        0 931404    0% /dev/shm
tmpfs                   tmpfs      931404    10076 921328    2% /run
tmpfs                   tmpfs      931404        0 931404    0% /sys/fs/cgroup
/dev/mapper/centos-root xfs      17811456 17118916 692540   97% /
/dev/sda1               xfs       1038336   358444 679892   35% /boot
tmpfs                   tmpfs      186284        0 186284    0% /run/user/0
[root@master ~]# xfs_growfs /dev/mapper/centos-root             //重新识别根分区
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=1113856 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=4455424, 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 4455424 to 6814720
[root@master ~]# df -h
文件系统                 容量  已用  可用 已用% 挂载点
devtmpfs                 893M     0  893M    0% /dev
tmpfs                    910M     0  910M    0% /dev/shm
tmpfs                    910M  9.9M  900M    2% /run
tmpfs                    910M     0  910M    0% /sys/fs/cgroup
/dev/mapper/centos-root   26G   17G  9.7G   63% /
/dev/sda1               1014M  351M  664M   35% /boot
tmpfs                    182M     0  182M    0% /run/user/0
[root@master ~]# 

posted @ 2024-05-01 12:15  碰这么难  阅读(2)  评论(0编辑  收藏  举报