LVM逻辑卷的扩容
说明：前已经创建的vg卷组data（共2.18t），之前elk和MySQL各分了559G，data卷组剩余1.09t，现在我把他新建一个lvm命名为backup，然后格式化在挂载到/data下
[root@k8s-master dev]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 3 0 wz--n- <930.51g 99.06g
data 1 2 0 wz--n- 2.18t 1.09t
新建lvm 命名为backup
[root@k8s-master dev]# lvcreate -L 1.09T -n backup data
Rounding up size to full physical extent 1.09 TiB
Logical volume "backup" created.
[root@k8s-master dev]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 3 0 wz--n- <930.51g 99.06g
data 1 3 0 wz--n- 2.18t 416.00m
[root@k8s-master dev]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
home centos -wi-ao---- 700.00g
root centos -wi-ao---- 100.00g
swap centos -wi-ao---- <31.45g
backup data -wi-a----- 1.09t
elk data -wi-ao---- <558.28g
mysql data -wi-ao---- <558.28g
格式化，指定xfs格式 (慎重操作，操作前请再三确认分区表)
[root@k8s-master dev]# mkfs -t xfs /dev/mapper/data-backup
meta-data=/dev/mapper/data-backup isize=512 agcount=4, agsize=73148672 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=292594688, imaxpct=5
= sunit=0 swidth=0 blks
ming =version 2 bsize=4096 ascii-ci=0 ftype=1
▽og =internal log bsize=4096 blocks=142868, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
创建挂载点并挂载
[root@k8s-master dev]# mkdir /data
[root@k8s-master dev]# mount /dev/mapper/data-backup /data/
检验刚才新挂载的数据盘
[root@k8s-master dev]# df -h
文件系统 容量 已用 可用 已用% 挂载点
/dev/mapper/centos-root 100G 31G 70G 31% /
devtmpfs 32G 0 32G 0% /dev
tmpfs 32G 0 32G 0% /dev/shm
tmpfs 32G 250M 32G 1% /run
tmpfs 32G 0 32G 0% /sys/fs/cgroup
/dev/sda1 497M 160M 338M 33% /boot
/dev/mapper/data-mysql 559G 59G 500G 11% /var/lib/mysqldata
/dev/mapper/centos-home 700G 50G 650G 8% /home
/dev/mapper/data-elk 559G 276G 283G 50% /elk
tmpfs 6.3G 0 6.3G 0% /run/user/1000
tmpfs 6.3G 0 6.3G 0% /run/user/0
/dev/dm-6 10G 211M 9.8G 3% /var/lib/docker/devicemapper/mnt/211dcaa002bd2a7f89ccaa913086668fd24ca70c298a3f425435d2209f805130
shm 64M 0 64M 0% /var/lib/docker/containers/e16e9a692c50385f88dfb7523fa47a01688e6680f6632e4f9cdf6065f013c094/mounts/shm
/dev/mapper/data-backup 1.1T 33M 1.1T 1% /data
查看UUID并写入开机自挂载
[root@k8s-master dev]# blkid | grep /dev/mapper/data-backup #查看UUID
/dev/mapper/data-backup: UUID="15de74f1-946a-4d41-93c0-b2afdeb57b59" TYPE="xfs"
[root@k8s-master dev]# vim /etc/fstab
UUID="15de74f1-946a-4d41-93c0-b2afdeb57b59" /data xfs defaults 0 0
