1 创建lvm
1.1 查看磁盘信息
# fdisk -l
Disk /dev/vda: 42.9 GB, 42949672960 bytes, 83886080 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: 0x000bec39
Device Boot Start End Blocks Id System
/dev/vda1 * 2048 83886046 41941999+ 83 Linux
Disk /dev/vdb: 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/vdc: 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/vdd: 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/vde: 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/vdf: 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
1.2 磁盘分区
# fdisk /dev/vdb
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 0x3508325a.
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): 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): t
Selected partition 1
Hex code (type L to list all codes): 8e
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
1.3 创建pv
# pvcreate /dev/vdb1
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Physical volume "/dev/vdb1" successfully created.
# pvdisplay
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
"/dev/vdb1" is a new physical volume of "<100.00 GiB"
--- NEW Physical volume ---
PV Name /dev/vdb1
VG Name
PV Size <100.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID EyU8pt-wnxd-BdXA-vZYw-puO6-QeRK-UDVcCV
1.4 创建vg
# vgcreate data_ob1 /dev/vdb1
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Volume group "data_ob1" successfully created
1.5 创建逻辑卷
# lvcreate -l 100%free -n binlog data_ob1
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Logical volume "binlog" created.
1.6 格式化
# mkfs.ext4 /dev/data_ob1/binlog
mke2fs 1.43.5 (04-Aug-2017)
Creating filesystem with 26213376 4k blocks and 6553600 inodes
Filesystem UUID: 4eb2b962-9bf8-4f20-a030-0964f677c91f
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 (131072 blocks): done
Writing superblocks and filesystem accounting information: done
1.7 挂载
# echo "/dev/mapper/data_ob1-binlog /home ext4 defaults 0 0" > /etc/fstab
# mount -a
1.8 验证
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 62G 0 62G 0% /dev
tmpfs 62G 0 62G 0% /dev/shm
tmpfs 62G 620K 62G 1% /run
tmpfs 62G 0 62G 0% /sys/fs/cgroup
/dev/vda1 40G 2.8G 35G 8% /
tmpfs 13G 0 13G 0% /run/user/0
/dev/mapper/data_ob1-binlog 98G 61M 93G 1% /home
2 lvm扩容
2.1 扩容vg
# vgextend data_ob1 /dev/vdc
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Physical volume "/dev/vdc" successfully created.
Volume group "data_ob1" successfully extended
2.2 逻辑卷扩容
# lvextend /dev/data_ob1/binlog /dev/vdc
WARNING: Failed to connect to lvmetad. Falling back to device scanning.
Size of logical volume data_ob1/binlog changed from <100.00 GiB (25599 extents) to 199.99 GiB (51198 extents).
Logical volume data_ob1/binlog successfully resized.
2.3 文件系统扩容
# resize2fs /dev/data_ob1/binlog
resize2fs 1.43.5 (04-Aug-2017)
Filesystem at /dev/data_ob1/binlog is mounted on /home; on-line resizing required
old_desc_blocks = 13, new_desc_blocks = 25
The filesystem on /dev/data_ob1/binlog is now 52426752 (4k) blocks long.
2.4 验证
# df -h
Filesystem Size Used Avail Use% Mounted on
devtmpfs 62G 0 62G 0% /dev
tmpfs 62G 0 62G 0% /dev/shm
tmpfs 62G 620K 62G 1% /run
tmpfs 62G 0 62G 0% /sys/fs/cgroup
/dev/vda1 40G 2.8G 35G 8% /
tmpfs 13G 0 13G 0% /run/user/0
/dev/mapper/data_ob1-binlog 197G 60M 188G 1% /home