2016年3月26日土曜日

論理ボリュームを作成して/varの空き容量を増やす_centos6

# vgdisplay /***空き容量があることとボリュームグループ名を確認***/
  --- Volume group ---
  VG Name               vg_centos6
  System ID
  Format                lvm2
  Metadata Areas        2
  Metadata Sequence No  6
  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               2.05 TiB
  PE Size               4.00 MiB
  Total PE              536424
  Alloc PE / Size       62053 / 242.39 GiB
  Free  PE / Size       474371 / 1.81 TiB 
  VG UUID               l7l1Qm-1a6k-aLuo-f6as-Ad9W-fKUb-rlSp0Q
# lvcreate -L 20G /dev/vg_centos6 /***論理ボリュームを作成。lvol0が新規作成される***/
  Logical volume "lvol0" created.
# lvdisplay /***論理ボリュームlvol0が作成されていることを確認***/
  --- Logical volume ---
  LV Path                /dev/vg_centos6/lv_root
  LV Name                lv_root
  VG Name                vg_centos6
  LV UUID                0GHTft-n48J-prcX-hV1O-fZ1R-ZlL2-dvdAWG
  LV Write Access        read/write
  LV Creation host, time centos6, 2015-12-05 22:27:49 +0900
  LV Status              available
  # open                 1
  LV Size                60.00 GiB
  Current LE             15360
  Segments               2
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:0
  --- Logical volume ---
  LV Path                /dev/vg_centos6/lv_home
  LV Name                lv_home
  VG Name                vg_centos6
  LV UUID                F6FT0Y-TKse-zeMy-dEwc-JBMW-66fG-x9GxGW
  LV Write Access        read/write
  LV Creation host, time centos6, 2015-12-05 22:28:16 +0900
  LV Status              available
  # open                 1
  LV Size                176.58 GiB
  Current LE             45205
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:2
  --- Logical volume ---
  LV Path                /dev/vg_centos6/lv_swap
  LV Name                lv_swap
  VG Name                vg_centos6
  LV UUID                9OSVwv-wmEa-CYcA-aYn0-q3Br-0CmH-tUliqW
  LV Write Access        read/write
  LV Creation host, time centos6, 2015-12-05 22:29:42 +0900
  LV Status              available
  # open                 1
  LV Size                5.81 GiB
  Current LE             1488
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:1
  --- Logical volume ---
  LV Path                /dev/vg_centos6/lvol0
  LV Name                lvol0
  VG Name                vg_centos6
  LV UUID                aeIEuE-jj2a-pDTV-N2pL-BCSG-W8e5-NX3gw7
  LV Write Access        read/write
  LV Creation host, time centos6, 2016-03-24 12:18:36 +0900
  LV Status              available
  # open                 0
  LV Size                20.00 GiB
  Current LE             5120
  Segments               1
  Allocation             inherit
  Read ahead sectors     auto
  - currently set to     256
  Block device           253:3

# mkfs -t ext3 /dev/vg_centos6/lvol0 /***作成した論理ボリュームに対してファイルシステムを作成***/
mke2fs 1.41.12 (17-May-2010)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=1 blocks, Stripe width=0 blocks
1310720 inodes, 5242880 blocks
262144 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=4294967296
160 block groups
32768 blocks per group, 32768 fragments per group
8192 inodes per group
Superblock backups stored on blocks:
        32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
        4096000
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: dodone
This filesystem will be automatically checked every 31 mounts or
180 days, whichever comes first.  Use tune2fs -c or -i to override.
# mount /dev/vg_centos6/lvol0 /var /***論理ボリュームを/varにマウント***/
# df -h /***/varに空き容量があることを確認***/
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_centos6-lv_root
                       59G   59G     0 100% /
tmpfs                 2.9G   80K  2.9G   1% /dev/shm
/dev/sda1             477M  142M  310M  32% /boot
/dev/mapper/vg_centos6-lv_home
                      174G   61M  165G   1% /home
/dev/mapper/vg_centos6-lvol0
                       20G  173M   19G   1% /var

# echo /dev/vg_centos6/lvol0 /var ext3 defaults 1 1 >> /etc/fstab /***再起動後もマウントされる状態にする***/


参考:論理ボリューム追加

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