vsphere 虚拟机 centos7 扩容/目录

env: vsphere6 虚拟机centos7（2C+2G+30G）

目标：centos7（2C+2G+60G）

1. 在vSphere Client上直接扩大虚拟机的硬盘空间或者挂载一块新硬盘。

2. 查看当前文件系统信息

[root@big ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   27G  4.0G   23G  15% /
devtmpfs                 908M     0  908M   0% /dev
tmpfs                    920M     0  920M   0% /dev/shm
tmpfs                    920M  8.9M  911M   1% /run
tmpfs                    920M     0  920M   0% /sys/fs/cgroup
/dev/sda1               1014M  142M  873M  14% /boot
tmpfs                    184M     0  184M   0% /run/user/0
[root@big ~]#

3. 查看磁盘分区信息

[root@big ~]# fdisk -lDisk /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: 0x000b7e05Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *        2048     2099199     1048576   83  Linux
/dev/sda2         2099200    62914559    30407680   8e  Linux LVMDisk /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 bytesDisk /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

4.创建新分区、设置分区类型

[root@big ~]# 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): n
Partition type:p   primary (2 primary, 0 extended, 2 free)e   extended
Select (default p): p
Partition number (3,4, default 3): 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 setCommand (m for help): pDisk /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: 0x000b7e05Device 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   83  Linux
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): pDisk /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: 0x000b7e05Device 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 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.

5. 创建pv

[root@big ~]# pvcreate /dev/sda3
WARNING: dos signature detected on /dev/sda3 at offset 510. Wipe it? [y/n]: yWiping dos signature on /dev/sda3.Physical volume "/dev/sda3" successfully created.

6. 添加lv

[root@big ~]# lvm
lvm> 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               <29.00 GiBPE Size               4.00 MiBTotal PE              7423Alloc PE / Size       7422 / 28.99 GiBFree  PE / Size       1 / 4.00 MiBVG UUID               Mr8HtH-GMqf-GRGs-Vo8i-K5xT-RtrZ-uLns02lvm> vgextend /dev/centos /dev/sda3Volume group "centos" successfully extended
lvm> 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               58.99 GiBPE Size               4.00 MiBTotal PE              15102Alloc PE / Size       7422 / 28.99 GiBFree  PE / Size       7680 / 30.00 GiBVG UUID               Mr8HtH-GMqf-GRGs-Vo8i-K5xT-RtrZ-uLns02lvm> lvextend -l +100%FREE /dev/centos/rootSize of logical volume centos/root changed from 26.99 GiB (6910 extents) to 56.99 GiB (14590 extents).Logical volume centos/root successfully resized.
lvm> quitExiting.

7. 查看lv

[root@big ~]# lvdisplay--- Logical volume ---LV Path                /dev/centos/swapLV Name                swapVG Name                centosLV UUID                evqLg6-TKlf-Chxi-jWCv-1K1U-OV0e-rYbiWcLV Write Access        read/writeLV Creation host, time localhost.localdomain, 2018-06-26 17:04:27 +0800LV Status              available# open                 2LV Size                2.00 GiBCurrent LE             512Segments               1Allocation             inheritRead ahead sectors     auto- currently set to     8192Block device           253:1--- Logical volume ---LV Path                /dev/centos/rootLV Name                rootVG Name                centosLV UUID                yHJ6iS-plGc-YyuT-4xUe-TJIG-yuFB-ZFZPprLV Write Access        read/writeLV Creation host, time localhost.localdomain, 2018-06-26 17:04:27 +0800LV Status              available# open                 1LV Size                56.99 GiBCurrent LE             14590Segments               2Allocation             inheritRead ahead sectors     auto- currently set to     8192Block device           253:0

8. 修改文件系统实现扩容

[root@big ~]# 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 14940160

9. 验证

[root@big ~]# df -h
Filesystem               Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   57G  1.2G   56G   2% /
devtmpfs                 2.9G     0  2.9G   0% /dev
tmpfs                    2.9G     0  2.9G   0% /dev/shm
tmpfs                    2.9G  8.8M  2.9G   1% /run
tmpfs                    2.9G     0  2.9G   0% /sys/fs/cgroup
/dev/sda1               1014M  142M  873M  14% /boot
tmpfs                    581M     0  581M   0% /run/user/0

tips：

[root@big ~]# resize2fs -p /dev/centos/root
resize2fs 1.42.9 (28-Dec-2013)
resize2fs: Bad magic number in super-block while trying to open /dev/centos/root
Couldn't find valid filesystem superblock.

solution：

xfs_growfs /dev/centos/root

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