擴大VMware虛擬機中CentOS7的硬盤空間過程記錄
參考鏈接:
http://blog.csdn.net/remote_roamer/article/details/50670802
http://www.cnblogs.com/juandx/p/5618162.html
1. 關閉虛擬機,虛擬機設置->硬盤->磁盤實用工具->擴展
原來的linux硬盤只有30G,擴展到100G
2. 對新增加的硬盤進行分區、格式化
2.1對新增加的硬盤進行分區
輸入命令:fdisk /dev/sda (因爲上面選擇的是擴展,即在原有的硬盤sda進行擴展,所以增加空間的硬盤是/dev/sda)
按照提示輸入:
[root@centos7dev~]# fdisk /dev/sda
Welcome to fdisk(util-linux 2.23.2).
Changes will remainin memory only, until you decide to write them.
Be careful beforeusing the write command.
Command (m for help):p (查看已分區數量 有兩個/dev/sda1 /dev/sda2))
Disk /dev/sda: 107.4GB, 107374182400 bytes, 209715200 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:0x0003f424
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 62914559 30944256 8e Linux LVM(原來的30G硬盤)
Command (m for help): n (新增加一個分區)
Partition type:
p primary (2 primary, 0 extended, 2 free)
e extended
Select (default p):p (分區類型選擇爲主分區)
Partition number (3,4, default 3):3(分區號選3)
First sector (62914560-209715199, default 62914560):Entre(回車,選擇默認起始扇區)
Using default value62914560
Last sector, +sectors or +size{K,M,G} (62914560-209715199, default209715199): Entre(回車,選擇默認結束扇區)
Using default value209715199
Partition 3 of typeLinux and of size 70 GiB is set
Command (m for help):t (t修改分區類型)
Partition number (1-3, default 3):3(選分區3)
Hex code (type L to list all codes):8e(修改爲LVM(8es就是上面p選項查看到的id)LVM是 LogicalVolume Manager(邏輯卷管理))
Changed type ofpartition 'Linux' to 'Linux LVM'
Command (m for help):w (保存)
The partition tablehas been altered!
Calling ioctl() tore-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 usedat
the next reboot or after you run partprobe(8) or kpartx(8)
Syncing disks.
[root@centos7dev~]# partprobe (根據上面的提示輸入)
[root@centos7dev~]# reboot (重啓linux)
2.2對新增加的硬盤進行格式化
重啓linux後格式化分區:mkfs.xfs /dev/sda3(sda3是剛纔分的區,另外注意:格式成什麼文件系統要使用df -Th命令先查看你當前linux系統使用的是什麼文件系統,我這邊看到的打印內容是:
Filesystem Type Size Used Avail Use% Mounted on
/dev/mapper/centos-root xfs 28G 12G 17G 42% /
所以使用mkfs.xfs命令
2.3.添加新LVM到已有的LVM組,實現擴容
lvm 進入lvm管理:
lvm> pvcreate /dev/sda3初始化剛纔的分區
lvm> vgdisplay 查看卷組(Volumegroup)名稱
--- Volumegroup ---
VGName centos
… … …
lvm> vgextend centos /dev/sda3 將初始化過的分區加入到虛擬卷組centos
lvm> lvdisplay 查看邏輯卷(Logical volume)情況,可以看到新建的70G邏輯卷
--- Physical volume ---
PV Name /dev/sda2
VG Name centos
PV Size 29.51 GiB / not usable 3.00 MiB
Allocatable yes
… … …
"/dev/sda3" is a new physicalvolume of "70.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda3
VG Name
PV Size 70.00 GiB
Allocatable NO
… … …
lvm> lvextend-L +70G /dev/centos/root 增加物理捲到根目錄,從上面的打印信息中可以看到根目錄是在/dev/centos/root
3. 以上只是卷擴容了,下面是文件系統的真正擴容,輸入以下命令:
xfs_growfs /dev/mapper/centos-root
4. 結果查看
[root@centos7dev~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 97G 12G 86G 12% /
…