Chapter06

约定不等于承诺〃 2023-06-01 06:08 6阅读 0赞

1．为主机增加80G SCSI 接口硬盘  
磁盘 /dev/sdd：85.9 GB, 85899345920 字节，167772160 个扇区  
Units = 扇区 of 1 \* 512 = 512 bytes  
扇区大小(逻辑/物理)：512 字节 / 512 字节  
I/O 大小(最小/最佳)：512 字节 / 512 字节

2．划分三个各20G的主分区  
\[root@localhost ~\]\# fdisk /dev/sdd  
  
磁盘 /dev/sdd：85.9 GB, 85899345920 字节，167772160 个扇区  
Units = 扇区 of 1 \* 512 = 512 bytes  
扇区大小(逻辑/物理)：512 字节 / 512 字节  
I/O 大小(最小/最佳)：512 字节 / 512 字节  
磁盘标签类型：dos  
磁盘标识符：0xa5229b47

设备 Boot Start End Blocks Id System  
/dev/sdd1 2048 41945087 20971520 83 Linux  
/dev/sdd2 41945088 83888127 20971520 83 Linux  
/dev/sdd3 83888128 125831167 20971520 83 Linux

3．将三个主分区转换为物理卷（pvcreate），扫描系统中的物理卷  
\[root@localhost ~\]\# pvcreate /dev/sdd\[123\]  
Physical volume "/dev/sdd1" successfully created.  
Physical volume "/dev/sdd2" successfully created.  
Physical volume "/dev/sdd3" successfully created.

\[root@localhost ~\]\# pvscan  
PV /dev/sda2 VG centos lvm2 \[<39.00 GiB / 4.00 MiB free\]  
PV /dev/sdd1 lvm2 \[20.00 GiB\]  
PV /dev/sdd3 lvm2 \[20.00 GiB\]  
PV /dev/sdd2 lvm2 \[20.00 GiB\]  
Total: 4 \[<99.00 GiB\] / in use: 1 \[<39.00 GiB\] / in no VG: 3 \[60.00 GiB\]

4．使用两个物理卷创建卷组，名字为myvg，查看卷组大小  
\[root@localhost ~\]\# vgcreate myvg /dev/sdd\[12\]  
Volume group "myvg" successfully created

\[root@localhost ~\]\# vgdisplay /dev/myvg  
\--- Volume group ---  
VG Name myvg  
System ID  
Format lvm2  
Metadata Areas 2  
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 2  
Act PV 2  
VG Size 39.99 GiB  
PE Size 4.00 MiB  
Total PE 10238  
Alloc PE / Size 0 / 0  
Free PE / Size 10238 / 39.99 GiB  
VG UUID TrFb0p-6NXe-sdI1-FJbp-ZuIx-UzKu-pDgGVp

5．创建逻辑卷mylv，大小为30G  
\[root@localhost ~\]\# lvcreate -L 30G -n mylv myvg  
Logical volume "mylv" created.

6．将逻辑卷格式化成xfs文件系统，并挂载到/data目录上，创建文件测试  
\[root@localhost ~\]\# mkfs.xfs /dev/myvg/mylv  
  
\[root@localhost ~\]\# mkdir /data

\[root@localhost ~\]\# mount /dev/myvg/mylv /data/  
mount: /dev/mapper/myvg-mylv 已经挂载或 /data 忙  
/dev/mapper/myvg-mylv 已经挂载到 /data 上

\[root@localhost ~\]\# df -hT  
文件系统 类型 容量 已用 可用 已用% 挂载点  
/dev/mapper/centos-root xfs 37G 9.1G 28G 25% /  
devtmpfs devtmpfs 897M 0 897M 0% /dev  
tmpfs tmpfs 912M 0 912M 0% /dev/shm  
tmpfs tmpfs 912M 9.0M 903M 1% /run  
tmpfs tmpfs 912M 0 912M 0% /sys/fs/cgroup  
/dev/sda1 xfs 1014M 179M 836M 18% /boot  
tmpfs tmpfs 183M 12K 183M 1% /run/user/42  
tmpfs tmpfs 183M 0 183M 0% /run/user/0  
/dev/mapper/myvg-mylv xfs 30G 33M 30G 1% /data

7．增大逻辑卷到35G  
\[root@localhost ~\]\# lvextend -L +5G /dev/myvg/mylv  
Size of logical volume myvg/mylv changed from 30.00 GiB (7680 extents) to 35.00 GiB (8960 extents).  
Logical volume myvg/mylv successfully resized.

\[root@localhost ~\]\# xfs\_growfs /dev/myvg/mylv  
\[root@localhost ~\]\# df -hT  
文件系统 类型 容量 已用 可用 已用% 挂载点  
/dev/mapper/centos-root xfs 37G 9.1G 28G 25% /  
devtmpfs devtmpfs 897M 0 897M 0% /dev  
tmpfs tmpfs 912M 0 912M 0% /dev/shm  
tmpfs tmpfs 912M 9.0M 903M 1% /run  
tmpfs tmpfs 912M 0 912M 0% /sys/fs/cgroup  
/dev/sda1 xfs 1014M 179M 836M 18% /boot  
tmpfs tmpfs 183M 12K 183M 1% /run/user/42  
tmpfs tmpfs 183M 0 183M 0% /run/user/0  
/dev/mapper/myvg-mylv xfs 35G 33M 35G 1% /data

\[root@localhost ~\]\# lvdisplay myvg mylv  
\--- Logical volume ---  
LV Path /dev/myvg/mylv  
LV Name mylv  
VG Name myvg  
LV UUID ApE11F-xwIR-sibN-cozj-Vfll-xhBc-e9s4to  
LV Write Access read/write  
LV Creation host, time localhost.localdomain, 2019-08-01 20:24:50 +0800  
LV Status available  
\# open 1  
LV Size 35.00 GiB  
Current LE 8960  
Segments 2  
Allocation inherit  
Read ahead sectors auto  
\- currently set to 8192  
Block device 253:2  
  
Volume group "mylv" not found  
Cannot process volume group mylv

8．编辑/etc/fstab文件挂载逻辑卷，并支持磁盘配额选项  
\[root@localhost ~\]\# vim /etc/fstab

\#  
\# /etc/fstab  
\# Created by anaconda on Sat Jul 27 13:57:15 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  
\#  
/dev/mapper/centos-root / xfs defaults 0 0  
UUID=5b23a4cd-a55b-48cb-8ba6-564a284d1543 /boot xfs default  
s 0 0  
/dev/mapper/centos-swap swap swap defaults 0 0  
/dev/myvg/mylv /data xfs defaults,usrquota,grpquota 0 2  
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"/etc/fstab" 12L, 514C 已写入

转载于:https://www.cnblogs.com/ITXJW/p/11305001.html