Linux 配置 LVM 邏輯卷
###########################################################################
1.1.系統版本：
[[email protected] ~]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
###########################################################################
2.1.檢視系統磁碟狀況：
[[email protected] ~]# fdisk -l
Disk /dev/sda: 21.5 GB, 21474836480 bytes, 41943040 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: 0x00064b7e
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 1026047 512000 83 Linux
/dev/sda2 1026048 41943039 20458496 8e Linux LVM
Disk /dev/sdb: 21.5 GB, 21474836480 bytes, 41943040 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: 0x7161e435
Device Boot Start End Blocks Id System
/dev/sdb1 2048 41943039 20970496 8e Linux LVM
Disk /dev/sdc: 21.5 GB, 21474836480 bytes, 41943040 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 /dev/mapper/centos-root: 15.7 GB, 15703474176 bytes, 30670848 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 /dev/mapper/centos-swap: 5242 MB, 5242880000 bytes, 10240000 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 /dev/mapper/vggroup001-lvdata: 20.4 GB, 20401094656 bytes, 39845888 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
######################################################################
3.1 使用 fdisk 建立分割槽，進入分割槽管理
[[email protected] ~]# fdisk /dev/sdc
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.
Device does not contain a recognized partition table
Building a new DOS disklabel with disk identifier 0x17068859.
Command (m for help): n # 新建分割槽。
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended # 擴充套件分割槽。
Select (default p): p # 新建分割槽為主分割槽 。
Partition number (1-4, default 1): 1 # 分割槽的ID 號。
First sector (2048-41943039, default 2048):
Using default value 2048
Last sector, +sectors or +size{K,M,G} (2048-41943039, default 41943039):
Using default value 41943039
Partition 1 of type Linux and of size 20 GiB is set
Command (m for help): t # 修改分割槽格式。
Selected partition 1
Hex code (type L to list all codes): 8e # 型別改為 8e。
Changed type of partition 'Linux' to 'Linux LVM'
Command (m for help): p # 檢視當前分割槽。
Disk /dev/sdc: 21.5 GB, 21474836480 bytes, 41943040 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: 0x17068859
Device Boot Start End Blocks Id System
/dev/sdc1 2048 41943039 20970496 8e Linux LVM
Command (m for help): w # 儲存。
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
###########################################################################
4.1 建立 PV。
[[email protected] ~]# pvcreate /dev/sdc1 # 建立 PV。
Physical volume "/dev/sdc1" successfully created.
[[email protected] ~]# partprobe
[[email protected] ~]# pvdisplay # 檢視 PV。
"/dev/sdc1" is a new physical volume of "<20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc1
VG Name
PV Size <20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID xED2qY-b0XV-8MXi-61nG-0aiV-E4qX-Sz2EpI
###########################################################################
5..1 建立 VG
[[email protected] ~]# vgcreate vgGroup001 /dev/sdc1 # 建立VG。
Volume group "vgGroup001" successfully created
[[email protected] ~]# pvdisplay # 檢視 VG。
--- Physical volume ---PV Name /dev/sdc1
VG Name vgGroup001
PV Size <20.00 GiB / not usable 3.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 5119
Free PE 5119
Allocated PE 0
PV UUID xED2qY-b0XV-8MXi-61nG-0aiV-E4qX-Sz2EpI
#######################################################################6..1 建立 LV
7.[[email protected] ~]# lvcreate -L 19G -n lvdata vgGroup001 # 建立 LV。
Logical volume "lvdata" created.
[[email protected] ~]# lvdisplay # 檢視 LV.
LV Path /dev/vgGroup001/lvdata
LV Name lvdata
VG Name vgGroup001
LV UUID jnoLUA-1vQF-sauB-PY75-kqLe-o13p-fdwK8e
LV Write Access read/write
LV Creation host, time localhost.localdomain, 2018-11-15 03:43:40 -0500
LV Status available
LV Size 19.00 GiB
Current LE 4864
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:3
#########################################################################
7.1 格式化磁碟。
[[email protected] ~]# mkfs -t ext4 /dev/vgGroup001/lvdata
8.1 配置臨時掛載
[[email protected] ~]# mkdir /data
[[email protected] ~]# mount /dev/vgGroup001/lvdata /data/
9.1 配置開機自動掛載
[[email protected] ~]# blkid /dev/vgGroup001/lvdata # 檢視磁碟UUID
/dev/vgGroup001/lvdata: UUID="3c7b53fe-0178-42d1-82cb-55183cdf1a78" TYPE="ext4
9.1.1.編輯檔案/etc/fstab，在檔案末尾新增一行
UUID="3c7b53fe-0178-42d1-82cb-55183cdf1a78 /data ext4 defaults 0 2
引數解釋：
UUID=bb84333a-6a0d-4285-a14c-cf8b5da88d61：要掛載的磁碟分割槽的UUID
/data：掛載目錄
ext4：分割槽格式為ext4
defaults：掛載時所要設定的引數(只讀，讀寫，啟用quota等)，輸入defaults包括的引數有(rw、dev、exec、auto、nouser、async)
0：使用dump是否要記錄，0為不需要，1為需要
2：2是開機時檢查的順序，boot系統檔案為1，其他檔案系統都為2，如不要檢查就為0