欢迎光临
我的个人博客网站

虚拟化下Centos7 扩容根分区

  1. 查看分区大小和挂载情况 用到的命令df、lsblk
[root@localhost ~]# df -h Filesystem               Size  Used Avail Use% Mounted on /dev/mapper/centos-root   99G   96G  3.9G  97% / devtmpfs                 3.8G     0  3.8G   0% /dev tmpfs                    3.9G   33M  3.8G   1% /dev/shm tmpfs                    3.9G   27M  3.8G   1% /run tmpfs                    3.9G     0  3.9G   0% /sys/fs/cgroup /dev/vda1               1014M  189M  826M  19% /boot tmpfs                    6.4G     0  6.4G   0% /run/user/0 [root@localhost ~]# lsblk NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT fd0               2:0    1    4K  0 disk  sr0              11:0    1 1024M  0 rom   vda             252:0    0  200G  0 disk  ├─vda1          252:1    0    1G  0 part /boot └─vda2          252:2    0   99G  0 part    └─centos-root 253:0    0   99G  0 lvm  / 

虚拟化下Centos7 扩容根分区

  1. 又原来的100G 调整虚拟机磁盘为200G 直接调整。

虚拟化下Centos7 扩容根分区

  1. 创建分区
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): p  Disk /dev/vda: 214.7 GB, 214748364800 bytes, 419430400 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: 0x000a727a     Device Boot      Start         End      Blocks   Id  System /dev/vda1   *        2048     2099199     1048576   83  Linux /dev/vda2         2099200   209715199   103808000   8e  Linux LVM  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 (209715200-419430399, default 209715200):  Using default value 209715200 Last sector, +sectors or +size{K,M,G} (209715200-419430399, default 419430399):  Using default value 419430399 Partition 3 of type Linux and of size 100 GiB is set  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. [root@localhost ~]# 

虚拟化下Centos7 扩容根分区

  1. 刷新分区并创建物理卷
[root@localhost ~]# partprobe /dev/vda [root@localhost ~]# lsblk NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT fd0               2:0    1    4K  0 disk  sr0              11:0    1 1024M  0 rom   vda             252:0    0  200G  0 disk  ├─vda1          252:1    0    1G  0 part /boot ├─vda2          252:2    0   99G  0 part  │ └─centos-root 253:0    0   99G  0 lvm  / └─vda3          252:3    0  100G  0 part  [root@localhost ~]# partprobe /dev/vda3 
  1. 查看卷组名称,以及卷组使用情况
[root@localhost ~]# vgdisplay    --- Volume group ---   VG Name               centos   System ID                Format                lvm2   Metadata Areas        1   Metadata Sequence No  2   VG Access             read/write   VG Status             resizable   MAX LV                0   Cur LV                1   Open LV               1   Max PV                0   Cur PV                1   Act PV                1   VG Size               <99.00 GiB   PE Size               4.00 MiB   Total PE              25343   Alloc PE / Size       25343 / <99.00 GiB   Free  PE / Size       0 / 0      VG UUID               wEdhD1-PJnZ-gSBB-ZE4X-pMKK-Obor-b7JnO2  

6.扩展卷组

[root@localhost ~]# vgextend centos /dev/vda3   Physical volume "/dev/vda3" successfully created.   Volume group "centos" successfully extended 

7.查看当前逻辑卷

[root@localhost ~]# lvdisplay    --- Logical volume ---   LV Path                /dev/centos/root   LV Name                root   VG Name                centos   LV UUID                q9mens-Ujcs-Kgzq-Gbtd-gEdF-D6x7-Oa3GmP   LV Write Access        read/write   LV Creation host, time localhost, 2020-01-13 11:17:40 +0800   LV Status              available   # open                 1   LV Size                <99.00 GiB   Current LE             25343   Segments               1   Allocation             inherit   Read ahead sectors     auto   - currently set to     8192   Block device           253:0  

8.将“VG Name centos”卷组中的空闲空间扩展到根分区逻辑卷

[root@localhost ~]# lvextend -l +100%FREE /dev/centos/root   Size of logical volume centos/root changed from <99.00 GiB (25343 extents) to 198.99 GiB (50942 extents).   Logical volume centos/root successfully resized. 

9.刷新根分区

[root@localhost ~]# xfs_growfs /dev/centos/root meta-data=/dev/mapper/centos-root isize=512    agcount=4, agsize=6487808 blks          =                       sectsz=512   attr=2, projid32bit=1          =                       crc=1        finobt=0 spinodes=0 data     =                       bsize=4096   blocks=25951232, imaxpct=25          =                       sunit=0      swidth=0 blks naming   =version 2              bsize=4096   ascii-ci=0 ftype=1 log      =internal               bsize=4096   blocks=12671, version=2          =                       sectsz=512   sunit=0 blks, lazy-count=1 realtime =none                   extsz=4096   blocks=0, rtextents=0 data blocks changed from 25951232 to 52164608   

虚拟化下Centos7 扩容根分区

赞(0) 打赏
未经允许不得转载:张拓的天空 » 虚拟化下Centos7 扩容根分区
分享到: 更多 (0)

评论 抢沙发

  • 昵称 (必填)
  • 邮箱 (必填)
  • 网址

专业的IT技术经验分享 更专业 更方便

联系我们本站主机

觉得文章有用就打赏一下文章作者

支付宝扫一扫打赏

微信扫一扫打赏