Linux邏輯卷的創建與擴容
阿新 • • 發佈：2019-03-13
-c rip required create mounted centos7 ont xxxx etc Logical volume 的創建
- 磁盤初始化
[root@xxxx-centos7-template ~]# fdisk -l Disk /dev/sda: 53.7 GB, 53687091200 bytes, 104857600 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: 0x000a580e Device Boot Start End Blocks Id System /dev/sda1 * 2048 411647 204800 83 Linux /dev/sda2 411648 104857599 52222976 8e Linux LVM Disk /dev/sdb: 107.4 GB, 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 /dev/mapper/centos-root: 44.9 GB, 44883247104 bytes, 87662592 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 /dev/mapper/centos-swap: 8589 MB, 8589934592 bytes, 16777216 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 [root@xxxx-centos7-template ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 42G 1.6G 41G 4% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 8.5M 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 197M 103M 95M 53% /boot tmpfs 799M 0 799M 0% /run/user/0 [root@xxxx-centos7-template ~]# mkdir /data [root@xxxx-centos7-template ~]# fdisk /dev/sdb 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. Device does not contain a recognized partition table Building a new DOS disklabel with disk identifier 0x3bb4b474. Command (m for help): n Partition type: p primary (0 primary, 0 extended, 4 free) e extended Select (default p): p Partition number (1-4, default 1): First sector (2048-209715199, default 2048): Using default value 2048 Last sector, +sectors or +size{K,M,G} (2048-209715199, default 209715199): Using default value 209715199 Partition 1 of type Linux and of size 100 GiB is set Command (m for help): p Disk /dev/sdb: 107.4 GB, 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: 0x3bb4b474 Device Boot Start End Blocks Id System /dev/sdb1 2048 209715199 104856576 83 Linux Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks. [root@xxxx-centos7-template ~]# partprobe Warning: Unable to open /dev/sr0 read-write (Read-only file system). /dev/sr0 has been opened read-only.
- 物理卷，卷組 創建
[root@xxxxcentos7-template ~]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created. [root@xxxx-centos7-template ~]# vgdisplay --- Volume group --- VG Name centos System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 49.80 GiB PE Size 4.00 MiB Total PE 12749 Alloc PE / Size 12749 / 49.80 GiB Free PE / Size 0 / 0 VG UUID uYlfgy-kh0D-YE6a-A3Eq-n4RN-t3QF-C7HBLS [root@xxxx-centos7-template ~]# vgextend centos /dev/sdb1 Volume group "centos" successfully extended [root@xxxx-centos7-template ~]# pvscan PV /dev/sda2 VG centos lvm2 [49.80 GiB / 0 free] PV /dev/sdb1 VG centos lvm2 [<100.00 GiB / <100.00 GiB free] Total: 2 [<149.80 GiB] / in use: 2 [<149.80 GiB] / in no VG: 0 [0 ]
> * 邏輯卷創建[root@xxxx-centos7-template ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID vFM0SF-6giK-lWPg-iCTY-usKM-ywpA-bp5zxd LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 2 LV Size 8.00 GiB Current LE 2048 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID mtRvdH-eFlc-3EiS-xQbW-lqfm-y6K5-bAiZrv LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 1 LV Size 41.80 GiB Current LE 10701 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 [root@xxxx-centos7-template ~]# lvcreate -L 100G -n data centos Volume group "centos" has insufficient free space (25599 extents): 25600 required. [root@skong-centos7-template ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID vFM0SF-6giK-lWPg-iCTY-usKM-ywpA-bp5zxd LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 2 LV Size 8.00 GiB Current LE 2048 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID mtRvdH-eFlc-3EiS-xQbW-lqfm-y6K5-bAiZrv LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 1 LV Size 41.80 GiB Current LE 10701 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 [root@xxxx-centos7-template ~]# lvcreate -L 99G -n data centos Logical volume "data" created. [root@xxxx-centos7-template ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID vFM0SF-6giK-lWPg-iCTY-usKM-ywpA-bp5zxd LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 2 LV Size 8.00 GiB Current LE 2048 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:1 --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID mtRvdH-eFlc-3EiS-xQbW-lqfm-y6K5-bAiZrv LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2018-04-20 13:44:01 +0800 LV Status available # open 1 LV Size 41.80 GiB Current LE 10701 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 --- Logical volume --- LV Path /dev/centos/data LV Name data VG Name centos LV UUID Jj7pYx-vlUm-2z9U-UcK0-Wx3m-182t-UeQH25 LV Write Access read/write LV Creation host, time xxxx-centos7-template, 2019-03-13 20:50:49 +0800 LV Status available # open 0 LV Size 99.00 GiB Current LE 25344 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:2
- 掛載lvm
[root@xxxx-centos7-template ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 42G 1.6G 41G 4% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.5M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 197M 103M 95M 53% /boot
tmpfs 799M 0 799M 0% /run/user/0
[root@xxxx-centos7-template ~]# mkfs.ext4 -j /dev/centos/data
mke2fs 1.42.9 (28-Dec-2013)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
Stride=0 blocks, Stripe width=0 blocks
6488064 inodes, 25952256 blocks
1297612 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=2174746624
792 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, 7962624, 11239424, 20480000, 23887872
Allocating group tables: done
Writing inode tables: done
Creating journal (32768 blocks): done
Writing superblocks and filesystem accounting information: done
[root@xxxx-centos7-template ~]# vim /etc/fstab
[root@xxxx-centos7-template ~]# cat /etc/fstab
/dev/mapper/centos-root / xfs defaults 0 0
UUID=30d431c7-640e-4431-8850-4a686d553114 /boot xfs defaults 0 0
/dev/mapper/centos-swap swap swap defaults 0 0
/dev/centos/data /data ext4 defaults 0 0
[root@xxxx-centos7-template ~]#
[root@xxxx-centos7-template ~]# mount -a
[root@xxxx-centos7-template ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 42G 1.6G 41G 4% /
devtmpfs 3.9G 0 3.9G 0% /dev
tmpfs 3.9G 0 3.9G 0% /dev/shm
tmpfs 3.9G 8.5M 3.9G 1% /run
tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup
/dev/sda1 197M 103M 95M 53% /boot
tmpfs 799M 0 799M 0% /run/user/0
/dev/mapper/centos-data 98G 61M 93G 1% /data
Logical volume 擴容
- 如果單純的給已存在了邏輯卷擴容
lvdisplay
lvextend /dev/centos/data /dev/sda3
xfs_growfs /dev/centos/data
Linux邏輯卷的創建與擴容