Centos7操作之LVM扩容磁盘空间，centos7lvm扩容


Centos7操作之LVM扩容磁盘空间

LVM XFS增加硬盘分区容量(resize2fs: Bad magic number in super-block while)
给某个硬盘增加分区之后
[root@Mysql01-213-66 ~]# df -h
Filesystem                            Size  Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02  7.7G  2.6G  4.8G  36% /
tmpfs                                 495M     0  495M   0% /dev/shm
/dev/sda1                             194M   29M  155M  16% /boot
/dev/mapper/vg_mysql0121366-LogVol01  8.0G  3.1G  5.0G  38% /data
这里增加/data大小
[root@Mysql01-213-66 ~]# fdisk -l /dev/sda

Disk /dev/sda: 40.8 GB, 40802189312 bytes
255 heads, 63 sectors/track, 4960 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000eb81f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          26      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              26        2350    18668544   8e  Linux LVM

进行分区
[root@Mysql01-213-66 ~]# fdisk /dev/sda

WARNING: DOS-compatible mode is deprecated. It's strongly recommended to
         switch off the mode (command 'c') and change display units to
         sectors (command 'u').

Command (m for help): n
Command action
   e   extended
   p   primary partition (1-4)
p
Partition number (1-4): 3
First cylinder (2350-4960, default 2350): 
Using default value 2350
Last cylinder, +cylinders or +size{K,M,G} (2350-4960, default 4960): 
Using default value 4960

Command (m for help): p

Disk /dev/sda: 40.8 GB, 40802189312 bytes
255 heads, 63 sectors/track, 4960 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x000eb81f

   Device Boot      Start         End      Blocks   Id  System
/dev/sda1   *           1          26      204800   83  Linux
Partition 1 does not end on cylinder boundary.
/dev/sda2              26        2350    18668544   8e  Linux LVM
/dev/sda3            2350        4960    20966832   83  Linux

Command (m for help): t
Partition number (1-4): 3
Hex code (type L to list codes): 8e
Changed system type of partition 3 to 8e (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.

重启服务器或者　partprobe
创建物理卷
[root@Mysql01-213-66 ~]# pvcreate /dev/sda3
  Physical volume "/dev/sda3" successfully created
使用vgscan查询物理卷
[root@Mysql01-213-66 ~]# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "vg_mysql0121366" using metadata type lvm2
使用新增物理卷扩展vg
[root@Mysql01-213-66 ~]# vgextend vg_mysql0121366 /dev/sda3
  Volume group "vg_mysql0121366" successfully extended
[root@Mysql01-213-66 ~]# vgscan
  Reading all physical volumes.  This may take a while...
  Found volume group "vg_mysql0121366" using metadata type lvm2
  查询vg
[root@Mysql01-213-66 ~]# vgdisplay 
  --- Volume group ---
  VG Name               vg_mysql0121366
  System ID             
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  5
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                3
  Open LV               3
  Max PV                0
  Cur PV                2
  Act PV                2
  VG Size               37.79 GiB
  PE Size               4.00 MiB
  Total PE              9675
  Alloc PE / Size       4557 / 17.80 GiB
  Free  PE / Size       5118 / 19.99 GiB
  VG UUID               Zy2PVv-xSsx-NEAv-L6ba-G8Oy-tBBq-5zXKQm
 查询lv
[root@Mysql01-213-66 ~]# lvdisplay 
  --- Logical volume ---
  LV Path                /dev/vg_mysql0121366/LogVol01
  LV Name                LogVol01
  VG Name                vg_mysql0121366
  LV UUID                5znkJ2-wdeZ-Y2o1-ECDS-gzzl-PqaS-qo2yZR
  LV Write Access        read/write
  LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:13 +0800
  LV Status              available
  # open                 1
  LV Size                8.00 GiB
  Current LE             2048
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2
   
  --- Logical volume ---
  LV Path                /dev/vg_mysql0121366/LogVol00
  LV Name                LogVol00
  VG Name                vg_mysql0121366
  LV UUID                b1FV1n-iKyK-kZ23-glRO-opFh-gDRp-TzWNcL
  LV Write Access        read/write
  LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:14 +0800
  LV Status              available
  # open                 1
  LV Size                2.00 GiB
  Current LE             512
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
   
  --- Logical volume ---
  LV Path                /dev/vg_mysql0121366/LogVol02
  LV Name                LogVol02
  VG Name                vg_mysql0121366
  LV UUID                eoVdk3-cbcP-9PlI-kZBL-6pY2-Jpbl-1WI2uH
  LV Write Access        read/write
  LV Creation host, time Mysql01-213-66, 2015-08-30 20:42:14 +0800
  LV Status              available
  # open                 1
  LV Size                7.80 GiB
  Current LE             1997
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1
   
[root@Mysql01-213-66 ~]# df -h
Filesystem                            Size  Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02  7.7G  2.6G  4.8G  35% /
tmpfs                                 495M     0  495M   0% /dev/shm
/dev/sda1                             194M   29M  155M  16% /boot
/dev/mapper/vg_mysql0121366-LogVol01  8.0G  3.1G  5.0G  38% /data
扩展lv
[root@Mysql01-213-66 ~]# lvextend -L +19G /dev/mapper/vg_mysql0121366-LogVol01
  Extending logical volume LogVol01 to 27.00 GiB
  Logical volume LogVol01 successfully resized
[root@Mysql01-213-66 ~]# df -h
Filesystem                            Size  Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02  7.7G  2.6G  4.8G  35% /
tmpfs                                 495M     0  495M   0% /dev/shm
/dev/sda1                             194M   29M  155M  16% /boot
/dev/mapper/vg_mysql0121366-LogVol01  8.0G  3.1G  5.0G  38% /data
若不是xfs我们可以用resize2fs，这里报错了
[root@Mysql01-213-66 ~]# resize2fs -f /dev/mapper/vg_mysql0121366-LogVol01
resize2fs 1.41.12 (17-May-2010)
resize2fs: Bad magic number in super-block while trying to open /dev/mapper/vg_mysql0121366-LogVol01
Couldn't find valid filesystem superblock.
[root@Mysql01-213-66 ~]# xfs_growfs /dev/mapper/vg_mysql0121366-LogVol01
meta-data=/dev/mapper/vg_mysql0121366-LogVol01 isize=256    agcount=4, agsize=524288 blks
         =                       sectsz=512   attr=2, projid32bit=0
data     =                       bsize=4096   blocks=2097152, imaxpct=25
         =                       sunit=0      swidth=0 blks
naming   =version 2              bsize=4096   ascii-ci=0
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 2097152 to 7077888
[root@Mysql01-213-66 ~]# df -h
Filesystem                            Size  Used Avail Use% Mounted on
/dev/mapper/vg_mysql0121366-LogVol02  7.7G  2.6G  4.8G  35% /
tmpfs                                 495M     0  495M   0% /dev/shm
/dev/sda1                             194M   29M  155M  16% /boot
/dev/mapper/vg_mysql0121366-LogVol01   27G  3.1G   24G  12% /data

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