环境
操作系统：CentOS Linux release 7.6.1810 (Core) 硬盘设备：3块100G硬盘（/dev/sdb、/dev/sdc、/dev/sdd） 过程：/dev/sdb和/dev/sdb合成一块lvm挂载在/data/目录，之后加入/dev/sdd，扩容/data/目录大小。
操作过程
/dev/sdb分区
[root@laofuxi.com ~]# parted -s /dev/sdb mklabel gpt [root@laofuxi.com ~]# parted -s /dev/sdb mkpart primary 0% 100% [root@laofuxi.com ~]# parted -s /dev/sdb toggle 1 lvm [root@laofuxi.com ~]# parted -s /dev/sdb print Model: VMware Virtual disk (scsi) Disk /dev/sdb: 107GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 107GB 107GB primary lvm
不重启读取分区信息
[root@laofuxi.com ~]# partprobe
/dev/sdc分区
[root@laofuxi.com ~]# parted -s /dev/sdc mklabel gpt [root@laofuxi.com ~]# parted -s /dev/sdc mkpart primary 0% 100% [root@laofuxi.com ~]# parted -s /dev/sdc toggle 1 lvm [root@laofuxi.com ~]# parted -s /dev/sdc print Model: VMware Virtual disk (scsi) Disk /dev/sdc: 107GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 107GB 107GB primary lvm
不重启读取分区信息
[root@laofuxi.com ~]# partprobe
LVM创建部分
使用命令pvcreate创建物理卷
[root@laofuxi.com ~]# pvcreate /dev/sdb1 Physical volume "/dev/sdb1" successfully created. [root@laofuxi.com ~]# pvcreate /dev/sdc1 Physical volume "/dev/sdc1" successfully created.
查看创建好的物理卷
[root@laofuxi.com ~]# pvdisplay --- Physical volume --- PV Name /dev/sdb1 VG Name data PV Size <100.00 GiB / not usable 2.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 25599 Free PE 25599 Allocated PE 0 PV UUID K0D5uu-WAPJ-7bGy-RKfd-AvUL-MlbA-oRdkRe --- Physical volume --- PV Name /dev/sdc1 VG Name data PV Size <100.00 GiB / not usable 2.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 25599 Free PE 25599 Allocated PE 0 PV UUID t4WxmX-G7LA-Dr8i-7GSs-f6LF-9fMl-ax61Xg
创建卷组名为data，将物理卷加入卷组
[root@laofuxi.com ~]# vgcreate data /dev/sdb1 /dev/sdc1 Volume group "data" successfully created
后面新加物理卷的时候也可以通过vgextend向data组添加物理卷
查看创建好的卷组
[root@laofuxi.com ~]# vgdisplay --- Volume group --- VG Name data 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 199.99 GiB PE Size 4.00 MiB Total PE 51198 Alloc PE / Size 0 / 0 Free PE / Size 51198 / 199.99 GiB VG UUID gxRJ2l-94W4-mFgt-s5Iv-qiyO-V2mx-eV8B6i
创建完卷组后，就可以创建逻辑卷，所有卷组空间大小全部用于创建逻辑卷
[root@laofuxi.com ~]# lvcreate -n data01 -l 100%VG data Logical volume "data01" created.
查看创建好的逻辑卷
[root@laofuxi.com ~]# lvdisplay --- Logical volume --- LV Path /dev/data/data01 LV Name data01 VG Name data LV UUID Kxf3GX-XdeX-Q2ok-Zgpp-yLeU-k173-IjrIMV LV Write Access read/write LV Creation host, time laofuxi.com, 2018-12-22 15:47:31 +0800 LV Status available # open 0 LV Size 199.99 GiB Current LE 51198 Segments 2 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3
格式化分区
[root@laofuxi.com ~]# mkfs.xfs /dev/data/data01
meta-data=/dev/data/data01 isize=512 agcount=4, agsize=13106688 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=52426752, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=25599, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@laofuxi.com ~]#
创建挂载目录/data/
[root@laofuxi.com ~]# mkdir -pv /data/ mkdir: created directory ‘/data/’
查看存储设备UUID
[root@laofuxi.com ~]# blkid /dev/mapper/centos-root: UUID="400a6d43-fa78-480a-bfc2-4b7bdc13ed46" TYPE="xfs" /dev/sda2: UUID="J6yOLO-2TqX-VOU8-eZN4-0igH-3fQd-SKlccd" TYPE="LVM2_member" /dev/sr0: UUID="2018-11-25-21-21-31-00" LABEL="CentOS 7 x86_64" TYPE="iso9660" PTTYPE="dos" /dev/sda1: UUID="ed02c768-3d81-42dd-ba0b-63a435a499f8" TYPE="xfs" /dev/mapper/centos-swap: UUID="5621c520-307f-4c68-9da6-feb8e6347ce1" TYPE="swap" /dev/mapper/centos-home: UUID="5fad35e8-a5be-40bd-8a0b-e2a9fce6075b" TYPE="xfs" /dev/sdb1: UUID="K0D5uu-WAPJ-7bGy-RKfd-AvUL-MlbA-oRdkRe" TYPE="LVM2_member" PARTLABEL="primary" PARTUUID="f1e6c9e9-af03-4806-a9ae-fc60bc40929f" /dev/sdc1: UUID="t4WxmX-G7LA-Dr8i-7GSs-f6LF-9fMl-ax61Xg" TYPE="LVM2_member" PARTLABEL="primary" PARTUUID="d8aa30cd-f7d5-47f4-8f12-7f1ac34748af" /dev/mapper/data-data01: UUID="16e7dd6c-8946-4998-980f-da07b8ec7374" TYPE="xfs"
添加开机自动挂载信息
[root@laofuxi.com ~]# vim /etc/fstab # # /etc/fstab # Created by anaconda on Sat Apr 15 05:43:07 2000 # # 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=ed02c768-3d81-42dd-ba0b-63a435a499f8 /boot xfs defaults 0 0 /dev/mapper/centos-home /home xfs defaults 0 0 /dev/mapper/centos-swap swap swap defaults 0 0 # /dev/mapper/data-data01 UUID=16e7dd6c-8946-4998-980f-da07b8ec7374 /data xfs defaults 0 0
保存退出。
执行挂载操作
[root@laofuxi.com ~]# mount -a
查看挂载后的状态，总容量是200G
[root@laofuxi.com ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 2.1G 48G 5% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 17M 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 1014M 145M 870M 15% /boot /dev/mapper/centos-home 42G 33M 42G 1% /home tmpfs 783M 0 783M 0% /run/user/0 /dev/mapper/data-data01 200G 33M 200G 1% /data
把/dev/sdd硬盘空间扩展到/data/目录里
/dev/sdd分区
[root@laofuxi.com ~]# parted -s /dev/sdd mklabel gpt [root@laofuxi.com ~]# parted -s /dev/sdd mkpart primary 0% 100% [root@laofuxi.com ~]# parted -s /dev/sdd toggle 1 lvm [root@laofuxi.com ~]# parted -s /dev/sdd print Model: VMware Virtual disk (scsi) Disk /dev/sdd: 107GB Sector size (logical/physical): 512B/512B Partition Table: gpt Disk Flags: Number Start End Size File system Name Flags 1 1049kB 107GB 107GB primary lvm
使用命令pvcreate创建物理卷
[root@laofuxi.com ~]# pvcreate /dev/sdd1 Physical volume "/dev/sdd1" successfully created.
查看创建好的物理卷
[root@laofuxi.com ~]# pvdisplay --- Physical volume --- PV Name /dev/sdb1 VG Name data PV Size <100.00 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 25599 Free PE 0 Allocated PE 25599 PV UUID K0D5uu-WAPJ-7bGy-RKfd-AvUL-MlbA-oRdkRe --- Physical volume --- PV Name /dev/sdc1 VG Name data PV Size <100.00 GiB / not usable 2.00 MiB Allocatable yes (but full) PE Size 4.00 MiB Total PE 25599 Free PE 0 Allocated PE 25599 PV UUID t4WxmX-G7LA-Dr8i-7GSs-f6LF-9fMl-ax61Xg --- NEW Physical volume --- PV Name /dev/sdd1 VG Name PV Size <100.00 GiB Allocatable NO PE Size 0 Total PE 0 Free PE 0 Allocated PE 0 PV UUID KQJM7w-1pU1-WCKo-mwzS-ygXZ-0x5U-RmSNWo
扩展VG：data
[root@laofuxi.com ~]# vgextend data /dev/sdd1
Volume group “data” successfully extended
查看扩展后的VG：data
[root@laofuxi.com ~]# vgdisplay --- Volume group --- VG Name data System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 3 Act PV 3 VG Size <299.99 GiB PE Size 4.00 MiB Total PE 76797 Alloc PE / Size 51198 / 199.99 GiB Free PE / Size 25599 / <100.00 GiB VG UUID gxRJ2l-94W4-mFgt-s5Iv-qiyO-V2mx-eV8B6i
扩展LV：data01
[root@laofuxi.com ~]# lvextend -l +100%FREE /dev/data/data01 Size of logical volume data/data01 changed from 199.99 GiB (51198 extents) to <299.99 GiB (76797 extents). Logical volume data/data01 successfully resized.
查看扩展后的LV：data01
[root@laofuxi.com ~]# lvdisplay --- Logical volume --- LV Path /dev/data/data01 LV Name data01 VG Name data LV UUID Kxf3GX-XdeX-Q2ok-Zgpp-yLeU-k173-IjrIMV LV Write Access read/write LV Creation host, time laofuxi.com, 2018-12-22 15:47:31 +0800 LV Status available # open 1 LV Size <299.99 GiB Current LE 76797 Segments 3 Allocation inherit Read ahead sectors auto - currently set to 8192 Block device 253:3
xfs文件系统：同步文件系统
[root@laofuxi.com ~]# xfs_growfs /dev/data/data01
meta-data=/dev/mapper/data-data01 isize=512 agcount=4, agsize=13106688 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0 spinodes=0
data = bsize=4096 blocks=52426752, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=25599, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 52426752 to 78640128
附：
resize2fs命令 针对的是ext2、ext3、ext4文件系统
xfs_growfs命令 针对的是xfs文件系统
查看LV扩展后的容量
[root@laofuxi.com ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/centos-root 50G 2.1G 48G 5% / devtmpfs 3.9G 0 3.9G 0% /dev tmpfs 3.9G 0 3.9G 0% /dev/shm tmpfs 3.9G 8.9M 3.9G 1% /run tmpfs 3.9G 0 3.9G 0% /sys/fs/cgroup /dev/sda1 1014M 145M 870M 15% /boot /dev/mapper/centos-home 42G 33M 42G 1% /home /dev/mapper/data-data01 300G 33M 300G 1% /data tmpfs 783M 0 783M 0% /run/user/0
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