《Linux运维实战：创建LVM挂载到指定目录》

一、环境信息

说明：将sdb和sdc了两个盘做成lvm，挂载到/data目录。

[JSUSER@host-10-233-250-28 ~]$ lsblk
NAME            MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT
fd0               2:0    1    4K  0 disk
sda               8:0    0  100G  0 disk
├─sda1            8:1    0  500M  0 part /boot
└─sda2            8:2    0 99.5G  0 part
  ├─centos-root 253:0    0 97.5G  0 lvm  /
  └─centos-swap 253:1    0    2G  0 lvm  [SWAP]
sdb               8:16   0 1000G  0 disk
sdc               8:32   0 1000G  0 disk
sr0              11:0    1 1024M  0 rom
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二、创建物理卷(pv)

#1、pvcreate 硬盘名称
[root@host-10-233-250-28 JSUSER]# pvcreate /dev/sdb /dev/sdc
Close failed on stray file descriptor 3 (socket:[608552]): File descriptor in bad state Parent PID 4462: bash
  Physical volume "/dev/sdb" successfully created.
  Physical volume "/dev/sdc" successfully created.

#2、查看pv：通过命令 pvdisplay或者pvs查看pv
[root@host-10-233-250-28 JSUSER]# pvs
Close failed on stray file descriptor 3 (socket:[44784]): File descriptor in bad state Parent PID 14827: bash
PV         VG     Fmt  Attr PSize     PFree
/dev/sdb   VGdata lvm2 a--  <1000.00g     0
/dev/sdc   VGdata lvm2 a--  <1000.00g 49.99g  
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三、创建卷组(VG)

#1、vgcreate  自定义VG名称  要加入的PV
[root@host-10-233-250-28 JSUSER]# vgcreate VGdata /dev/sdb /dev/sdc
Close failed on stray file descriptor 3 (socket:[604080]): File descriptor in bad state Parent PID 4462: bash
  Volume group "VGdata" successfully created

#2、查看VG：通过命令vgdisplay或vgs来查看创建的卷组
[root@host-10-233-250-28 JSUSER]# vgs
Close failed on stray file descriptor 3 (socket:[44888]): File descriptor in bad state Parent PID 14827: bash
VG     #PV #LV #SN Attr   VSize   VFree
VGdata   2   1   0 wz--n-   1.95t 49.99g
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四、创建逻辑卷(LV)

#1、lvcreate -n 自定义逻辑卷名称 -L 要创建的逻辑卷的大小 VG名称
[root@host-10-233-250-28 JSUSER]# lvcreate -n LVdata -L 1950G VGdata
Close failed on stray file descriptor 3 (socket:[608694]): File descriptor in bad state Parent PID 4462: bash
  Logical volume "LVdata" created.
 
#2、查看卷组(LV)：通过命令lvs或lvdisplay查看lv的详细信息
[root@host-10-233-250-28 JSUSER]# lvs
Close failed on stray file descriptor 3 (socket:[44998]): File descriptor in bad state Parent PID 14827: bash
  LV     VG     Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert
LVdata VGdata -wi-ao----   1.90t
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五、格式化分区挂载

#1、创建文件系统(xfs)：mkfs.xfs /dev/VGName/LVName -f
[root@host-10-233-250-28 JSUSER]# mkfs.xfs /dev/VGdata/LVdata -f
meta-data=/dev/VGdata/LVdata     isize=512    agcount=4, agsize=127795200 blks
                =                       sectsz=512   attr=2, projid32bit=1
                =                       crc=1        finobt=0, sparse=0
data          =                      bsize=4096   blocks=511180800, imaxpct=5
                 =                      sunit=0      swidth=0 blks
naming      =version 2         bsize=4096   ascii-ci=0 ftype=1
log           =internal log      bsize=4096   blocks=249600, version=2
                =                       sectsz=512   sunit=0 blks, lazy-count=1
realtime =none                   extsz=4096   blocks=0, rtextents=0

#2、挂载LV：mount  /dev/VGName/LVName /data
[root@host-10-233-250-28 JSUSER]# mount /dev/VGdata/LVdata  /data/

#3、查看分区
[root@host-10-233-250-28 JSUSER]# df -Th
Filesystem                Type      Size  Used Avail Use% Mounted on
/dev/mapper/centos-root   xfs        98G  1.8G   96G   2% /
devtmpfs                  devtmpfs   16G     0   16G   0% /dev
tmpfs                     tmpfs      16G     0   16G   0% /dev/shm
tmpfs                     tmpfs      16G   17M   16G   1% /run
tmpfs                     tmpfs      16G     0   16G   0% /sys/fs/cgroup
/dev/sda1                 xfs       497M  139M  359M  28% /boot
tmpfs                     tmpfs     3.2G     0  3.2G   0% /run/user/0
tmpfs                     tmpfs     3.2G     0  3.2G   0% /run/user/1000
/dev/mapper/VGdata-LVdata xfs       2.0T   33M  2.0T   1% /data
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更多详细内容请参考：Linux运维实战总结