Esxi 虚拟机 Centos 磁盘空间扩展/扩容

前言

公司一台测试服务器部署在 esxi 上，某天开发告知空间不足，那么，就扩容咯。

首先查看当前磁盘状态

[root@dev-of-iotex-52 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   27G   27G   20K 100% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G  417M  3.5G  11% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  321M  694M  32% /boot
tmpfs                    783M     0  783M   0% /run/user/0
overlay                   27G   27G   20K 100% /var/lib/docker/overlay2/3778278709a9450bd2a5d54e986b80df70d6adf070b1e4dc9b35ec619c60cb39/merged
shm                       64M     0   64M   0% /var/lib/docker/containers/90c688b28aa1c7fd65c01b5192fa2ff845966b6bed13b3701ba9790603de81fc/mounts/shm

确定原有磁盘格式是 lvm

到 esxi 管理页面修改磁盘大小

重启一下虚拟机

查看一下是否有把磁盘容量扩展上去

给新增加的磁盘做分区

[root@dev-of-iotex-52 ~]# 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): 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 (62914560-125829119, default 62914560): 
Using default value 62914560
Last sector, +sectors or +size{K,M,G} (62914560-125829119, default 125829119): 
Using default value 125829119
Partition 3 of type Linux and of size 30 GiB is set

Command (m for help): t
Partition number (1-3, default 3): 3
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'

Command (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.

查看分区情况

[root@dev-of-iotex-52 ~]# fdisk -l

Disk /dev/sda: 64.4 GB, 64424509440 bytes, 125829120 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: 0x000b15b6

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    62914559    30407680   8e  Linux LVM
/dev/sda3        62914560   125829119    31457280   8e  Linux LVM

Disk /dev/mapper/centos-root: 29.0 GB, 28982640640 bytes, 56606720 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/centos-swap: 2147 MB, 2147483648 bytes, 4194304 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

刷新一下磁盘状况，新建逻辑卷 LV

[root@dev-of-iotex-52 ~]# partprobe
[root@dev-of-iotex-52 ~]# pvcreate /dev/sda3
  Physical volume "/dev/sda3" successfully created.

查看卷组 VG 状况并扩容

[root@dev-of-iotex-52 ~]# 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               <29.00 GiB
  PE Size               4.00 MiB
  Total PE              7423
  Alloc PE / Size       7422 / 28.99 GiB
  Free  PE / Size       1 / 4.00 MiB
  VG UUID               oFvSXN-U517-Q8i5-KaxD-sWqO-CBuC-r7p0Kh
   
[root@dev-of-iotex-52 ~]# vgextend centos /dev/sda3
  Volume group "centos" successfully extended

查看物理卷 PV 和逻辑卷 LV 状况并扩容逻辑卷 LV

[root@dev-of-iotex-52 ~]# pvscan
  PV /dev/sda2   VG centos          lvm2 [<29.00 GiB / 4.00 MiB free]
  PV /dev/sda3   VG centos          lvm2 [<30.00 GiB / <30.00 GiB free]
  Total: 2 [58.99 GiB] / in use: 2 [58.99 GiB] / in no VG: 0 [0   ]
[root@dev-of-iotex-52 ~]# lvdisplay
  --- Logical volume ---
  LV Path                /dev/centos/swap
  LV Name                swap
  VG Name                centos
  LV UUID                5aS1q2-DCSS-8NQH-do6D-NTI6-3242-GT5nhF
  LV Write Access        read/write
  LV Creation host, time localhost, 2018-01-16 00:38:03 +0800
  LV Status              available
  # open                 2
  LV Size                2.00 GiB
  Current LE             512
  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                U3KYq5-Bd5I-iFDv-63dd-qUpJ-gN5Z-zbu1XH
  LV Write Access        read/write
  LV Creation host, time localhost, 2018-01-16 00:38:03 +0800
  LV Status              available
  # open                 1
  LV Size                26.99 GiB
  Current LE             6910
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     8192
  Block device           253:0
   
[root@dev-of-iotex-52 ~]# lvextend  /dev/centos/root  /dev/sda3
  Size of logical volume centos/root changed from 26.99 GiB (6910 extents) to <56.99 GiB (14589 extents).
  Logical volume centos/root successfully resized.

同步文件系统并查看扩容状况

[root@dev-of-iotex-52 ~]# xfs_growfs /dev/centos/root
meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=1768960 blks
         =                       sectsz=512   attr=2, projid32bit=1
         =                       crc=1        finobt=0 spinodes=0
data     =                       bsize=4096   blocks=7075840, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0 ftype=1
log      =internal               bsize=4096   blocks=3455, version=2
         =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0
data blocks changed from 7075840 to 14939136
[root@dev-of-iotex-52 ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   57G   27G   30G  48% /
devtmpfs                 3.9G     0  3.9G   0% /dev
tmpfs                    3.9G     0  3.9G   0% /dev/shm
tmpfs                    3.9G  9.0M  3.9G   1% /run
tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  321M  694M  32% /boot
tmpfs                    783M     0  783M   0% /run/user/0