在扩容时，执行
vgextend centos /dev/sdb1
创建卷组
[[email protected] ~]# vgcreate centos /dev/sda4 Physical volume "/dev/sda4" successfully created Volume group "centos" successfully created [[email protected] ~]# vgdisplay --- Volume group --- VG Name centos 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 44.00 GiB PE Size 4.00 MiB Total PE 11263 Alloc PE / Size 0 / 0 Free PE / Size 11263 / 44.00 GiB VG UUID 3r3gTx-mrY2-6RAA-mrPt-RBnn-8BaV-3DlO1l
5、创建逻辑卷
[[email protected] ~]# lvcreate -L 43G -n root centos # 创建 Logical volume "root" created. [[email protected] ~]# lvdisplay --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID XNJ9Ut-0fmU-RQqq-AY2f-xC2j-9zhL-qLFuwY LV Write Access read/write LV Creation host, time localhost.localdomain, 2019-08-13 11:31:18 +0800 LV Status available # open 0 LV Size 43.00 GiB Current LE 11008 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:0 [[email protected] /]# mkfs.ext3 /dev/centos/root #格式化逻辑分区 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 2818048 inodes, 11272192 blocks 563609 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 344 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 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done
6、挂载点，这里把新增逻辑分区，挂在到了 /data 目录
[[email protected] /]# mount /dev/centos/root /data [[email protected] /]# df -h Filesystem Size Used Avail Use% Mounted on /dev/sda3 18G 8.2G 9.6G 46% / devtmpfs 475M 0 475M 0% /dev tmpfs 489M 84K 489M 1% /dev/shm tmpfs 489M 7.1M 482M 2% /run tmpfs 489M 0 489M 0% /sys/fs/cgroup /dev/sda1 297M 144M 154M 49% /boot tmpfs 98M 20K 98M 1% /run/user/42 tmpfs 98M 0 98M 0% /run/user/0 /dev/mapper/centos-root 43G 52M 40G 1% /data # 这里从逻辑分区 /dev/centos/root 变成了 /dev/mapper/centos-root，是个很奇怪的点，后续要弄清楚
7、永久挂载
普通mount ，重启机器后，就会失效，如果想永久挂载，还需要修改配置文件
[[email protected] bin]# vim /etc/fstab # 修改配置文件
# # /etc/fstab # Created by anaconda on Mon Jul 1 01:07:33 2019 # # Accessible filesystems, by reference, are maintained under '/dev/disk' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=f66e8bc7-ef82-473e-b565-df8ef7cfcda7 / xfs defaults 0 0 UUID=c6e2743d-3e47-40a6-a74f-e429e1b3efc4 /boot xfs defaults 0 0 UUID=681ef8e7-767e-47d4-84c4-7d705ac9dea4 swap swap defaults 0 0 #/dev/cetnos/root /data xfs auto 0 0 #逻辑分区 挂载点 文件格式(与前面格式化文件格式保持一致) defaults(默认是读写) 0 0 /dev/mapper/centos-root /date ext3 defaults 0 0】
[[email protected] bin]# umount /dev/centos/root #卸载挂载点 [[email protected] bin]# mount -a #读取配置文件挂载 [[email protected] bin]# root #重启，查看挂载点，是否失效
备注
df -T -h # 查看挂载的分区信息
parted -l #查看所有的分区信息
blkid
[[email protected]]# mkfs -t ext3 /dev/sda4 mke2fs 1.39 (29-May-2006) /dev/sda4 isapparently in use by the system; will not make a filesystem here! 提示/dev/sda4 正在被使用。 /dev/sda4 正在被DM管理，所以我们创建文件系统时提示报错，我们手工的移除，就可以正常的创建文件系统，操作如下： [[email protected] ]# dmsetup status [[email protected]]# dmsetup remove_all
fuser -km /data # 强制终止 data进程