Linux系统下创建LV（逻辑卷）并挂载
1、查看磁盘情况
[root@ecs-34a8-0913916 ~]# fdisk -l Disk /dev/vda: 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: 0x000bcc64 Device Boot Start End Blocks Id System /dev/vda1 2048 8390655 4194304 82 Linux swap / Solaris /dev/vda2 * 8390656 209715166 100662255+ 83 Linux Disk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 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: 0x1f1ab182 Device Boot Start End Blocks Id System /dev/vdb1 2048 2097151999 1048574976 83 Linux
可以看到有个/dev/vdb1的磁盘分区待使用。
如果没有/dev/vdb1的分区的话，需要对磁盘/dev/vdb先进行分区。
2、系统标识符
[root@ecs-34a8-0913916 ~]# 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. Command (m for help): p Disk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 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: 0x1f1ab182 Device Boot Start End Blocks Id System /dev/vdb1 2048 2097151999 1048574976 83 Linux 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): p Disk /dev/vdb: 1073.7 GB, 1073741824000 bytes, 2097152000 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: 0x1f1ab182 Device Boot Start End Blocks Id System /dev/vdb1 2048 2097151999 1048574976 8e Linux LVM Command (m for help): w The partition table has been altered! Calling ioctl() to re-read partition table. Syncing disks.
输入 t 改变分区1的属性
输入 L 查看有个属性对应的命令
输入 8e 改变分区1为 Linux LVM格式
输入 p 打印分区情况，发现建立的分区 /dev/vdb1 为 Linux LVM 格式
输入w保存退出（q为不保存修改退出）
3、创建PV
[root@ecs-34a8-0913991 ~]# pvcreate /dev/vdb1 WARNING: xfs signature detected on /dev/vdb1 at offset 0. Wipe it? [y/n]: y Wiping xfs signature on /dev/vdb1. Physical volume "/dev/vdb1" successfully created. [root@ecs-34a8-0913991 ~]# [root@ecs-34a8-0913991 ~]# vgcreate vg_vdb /dev/vdb1 Volume group "vg_vdb" successfully created [root@ecs-34a8-0913991 ~]# vgdisplay --- Volume group --- VG Name vg_vdb System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <1000.00 GiB PE Size 4.00 MiB Total PE 255999 Alloc PE / Size 0 / 0 Free PE / Size 255999 / <1000.00 GiB VG UUID rnjRTf-Nwaz-vB0F-a2Yv-WK1b-QNwb-WswEf6
创建PV：pvcreate /dev/vdb1
查看PV：pvdisplay
4、创建 VG
[root@ecs-34a8-0913991 ~]# vgcreate vg_vdb /dev/vdb1 Volume group "vg_vdb" successfully created [root@ecs-34a8-0913991 ~]# vgdisplay --- Volume group --- VG Name vg_vdb System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 1 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 1 Act PV 1 VG Size <1000.00 GiB PE Size 4.00 MiB Total PE 255999 Alloc PE / Size 0 / 0 Free PE / Size 255999 / <1000.00 GiB VG UUID rnjRTf-Nwaz-vB0F-a2Yv-WK1b-QNwb-WswEf6
创建VG：vgcreate vg_vdb /dev/vdb1
查看VG：vgdisplay
这样我们就创建了一个 1000G（255999 个PE，要记住这个数字）的VG（名字为vg_vdb）
5、创建LV
[root@ecs-34a8-0913991 ~]# lvcreate -l 255999 -n lv_vdb vg_vdb Logical volume "lv_vdb" created.
创建LV：lvcreate -l 255999 -n lv_vdb vg_vdb （255999是VG中PE的个数）
查看LV：lvdisplay
[root@ecs-34a8-0913991 ~]# lvdisplay --- Logical volume --- LV Path /dev/vg_vdb/lv_vdb LV Name lv_vdb VG Name vg_vdb LV UUID HNgtI1-OSYg-GRmk-xBMB-VwxR-CdJv-pWyBMq LV Write Access read/write LV Creation host, time ecs-34a8-0913991, 2023-09-27 18:07:35 +0800 LV Status available # open 1 LV Size <1000.00 GiB Current LE 255999 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 252:0
6、格式化刚刚创建的LV
# mkfs -t ext4 /dev/vg_vdb/lv_vdb 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 65536000 inodes, 262142976 blocks 13107148 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=2409627648 8000 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, 71663616, 78675968, 102400000, 214990848 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
7、挂载磁盘
[root@ecs-34a8-0913991 ~]# mkdir /data01 [root@ecs-34a8-0913991 ~]# mount /dev/vg_vdb/lv_vdb /data01
8、加入开机自启/etc/fstab
