Linux系统中物理劵增加、删除；卷组的扩容、缩容；逻辑卷的增加与删除
1、准备三块测试硬盘
[root@PC1linuxprobe dev]# pwd
/dev
[root@PC1linuxprobe dev]# find sd*
sda
sda1
sda2
sdb
sdc
sdd
2、将/dev/sdb和/dev/sdc格式化为物理劵
[root@PC1linuxprobe dev]# pvcreate /dev/sdb /dev/sdc
Physical volume "/dev/sdb" successfully created
Physical volume "/dev/sdc" successfully created
[root@PC1linuxprobe dev]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name rhel
PV Size 19.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4994
Free PE 0
Allocated PE 4994
PV UUID yjrVt7-2jdY-K7hl-x7yf-p5zQ-EeSk-TjDEBo
"/dev/sdb" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID oz6M4H-dXWv-Oig2-WBiL-ZO9y-CwvW-pcpPDw
"/dev/sdc" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID HFL1Xz-r0jh-EWw4-79Ny-SeCJ-cyLf-jBTtBq
3、删除/dev/sdc物理劵
[root@PC1linuxprobe dev]# pvremove /dev/sdc
Labels on physical volume "/dev/sdc" successfully wiped
[root@PC1linuxprobe dev]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name rhel
PV Size 19.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4994
Free PE 0
Allocated PE 4994
PV UUID yjrVt7-2jdY-K7hl-x7yf-p5zQ-EeSk-TjDEBo
"/dev/sdb" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID oz6M4H-dXWv-Oig2-WBiL-ZO9y-CwvW-pcpPDw
4、将/dev/sdc和/dev/sdd添加为物理劵
[root@PC1linuxprobe dev]# pvcreate /dev/sdc
Physical volume "/dev/sdc" successfully created
[root@PC1linuxprobe dev]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name rhel
PV Size 19.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4994
Free PE 0
Allocated PE 4994
PV UUID yjrVt7-2jdY-K7hl-x7yf-p5zQ-EeSk-TjDEBo
"/dev/sdb" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID oz6M4H-dXWv-Oig2-WBiL-ZO9y-CwvW-pcpPDw
"/dev/sdc" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 0ys3mD-KMOU-6d7y-5fyc-Z5Ls-IIKX-3N9OTc
[root@PC1linuxprobe dev]# pvcreate /dev/sdd
Physical volume "/dev/sdd" successfully created
[root@PC1linuxprobe dev]# pvdisplay
--- Physical volume ---
PV Name /dev/sda2
VG Name rhel
PV Size 19.51 GiB / not usable 3.00 MiB
Allocatable yes (but full)
PE Size 4.00 MiB
Total PE 4994
Free PE 0
Allocated PE 4994
PV UUID yjrVt7-2jdY-K7hl-x7yf-p5zQ-EeSk-TjDEBo
"/dev/sdb" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdb
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID oz6M4H-dXWv-Oig2-WBiL-ZO9y-CwvW-pcpPDw
"/dev/sdc" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdc
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID 0ys3mD-KMOU-6d7y-5fyc-Z5Ls-IIKX-3N9OTc
"/dev/sdd" is a new physical volume of "20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sdd
VG Name
PV Size 20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID Z3R2Ek-xwNp-nRiC-47jq-fCa5-jxO6-Wf0LWS
查看此时的物理劵：
[root@PC1linuxprobe dev]# pvscan
PV /dev/sda2 VG rhel lvm2 [19.51 GiB / 0 free]
PV /dev/sdb VG vg1 lvm2 [20.00 GiB / 19.41 GiB free]
PV /dev/sdd VG vg1 lvm2 [20.00 GiB / 20.00 GiB free]
PV /dev/sdc VG vg1 lvm2 [20.00 GiB / 20.00 GiB free]
5、将/dev/sdb、/dev/sdc、/dev/sdd创建为卷组vg1
[root@PC1linuxprobe dev]# vgcreate vg1 /dev/sdb /dev/sdc /dev/sdd
Volume group "vg1" successfully created
[root@PC1linuxprobe dev]# vgdisplay
--- Volume group ---
VG Name rhel
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 19.51 GiB
PE Size 4.00 MiB
Total PE 4994
Alloc PE / Size 4994 / 19.51 GiB
Free PE / Size 0 / 0
VG UUID UWd4dl-0vSA-zern-l7on-XLj0-e3cR-AHmckC
--- Volume group ---
VG Name vg1
System ID
Format lvm2
Metadata Areas 3
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 3
Act PV 3
VG Size 59.99 GiB
PE Size 4.00 MiB
Total PE 15357
Alloc PE / Size 0 / 0
Free PE / Size 15357 / 59.99 GiB
VG UUID jZeTak-WfBZ-f0K6-57wM-cT5y-BxYJ-8AzNvO
6、从卷组vg1中删除/dev/sdb
[root@PC1linuxprobe dev]# vgreduce vg1 /dev/sdc
Removed "/dev/sdc" from volume group "vg1"
[root@PC1linuxprobe dev]# vgdisplay
--- Volume group ---
VG Name rhel
System ID
Format lvm2
Metadata Areas 1
Metadata Sequence No 3
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 1
Act PV 1
VG Size 19.51 GiB
PE Size 4.00 MiB
Total PE 4994
Alloc PE / Size 4994 / 19.51 GiB
Free PE / Size 0 / 0
VG UUID UWd4dl-0vSA-zern-l7on-XLj0-e3cR-AHmckC
--- Volume group ---
VG Name vg1
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 2
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 Bjeykx-Lulw-rdC5-s1MV-9MSE-5G1y-hbYaHl
7、将/dev/sdc增加到卷组vg1
[root@PC1linuxprobe dev]# vgextend vg1 /dev/sdc Volume group "vg1" successfully extended [root@PC1linuxprobe dev]# vgdisplay --- Volume group --- VG Name rhel System ID Format lvm2 Metadata Areas 1 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 1 Act PV 1 VG Size 19.51 GiB PE Size 4.00 MiB Total PE 4994 Alloc PE / Size 4994 / 19.51 GiB Free PE / Size 0 / 0 VG UUID UWd4dl-0vSA-zern-l7on-XLj0-e3cR-AHmckC --- Volume group --- VG Name vg1 System ID Format lvm2 Metadata Areas 3 Metadata Sequence No 3 VG Access read/write VG Status resizable MAX LV 0 Cur LV 0 Open LV 0 Max PV 0 Cur PV 3 Act PV 3 VG Size 59.99 GiB PE Size 4.00 MiB Total PE 15357 Alloc PE / Size 0 / 0 Free PE / Size 15357 / 59.99 GiB VG UUID Bjeykx-Lulw-rdC5-s1MV-9MSE-5G1y-hbYaHl
查看此时的卷组：
[root@PC1linuxprobe dev]# vgscan
Reading all physical volumes. This may take a while...
Found volume group "rhel" using metadata type lvm2
Found volume group "vg1" using metadata type lvm2
8、从卷组vg1中切割出逻辑卷lv1、lv2、lv3
[root@PC1linuxprobe dev]# lvcreate -n lv1 -L 100M vg1
Logical volume "lv1" created
[root@PC1linuxprobe dev]# lvdisplay
--- Logical volume ---
LV Path /dev/rhel/swap
LV Name swap
VG Name rhel
LV UUID 1vqFco-Lxys-ZwR7-1M05-4E22-QQ1G-txfgUg
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/rhel/root
LV Name root
VG Name rhel
LV UUID 9I3kQe-7tJ4-H61H-ppmA-admB-WKqD-20F6oa
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 1
LV Size 17.51 GiB
Current LE 4482
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID 9EoISr-VUde-Ow95-MVhd-b0ka-ba5e-C7NMfF
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:40:22 +0800
LV Status available
# open 0
LV Size 100.00 MiB
Current LE 25
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:2
[root@PC1linuxprobe dev]# lvcreate -n lv2 -L 200M vg1
Logical volume "lv2" created
[root@PC1linuxprobe dev]# lvdisplay
--- Logical volume ---
LV Path /dev/rhel/swap
LV Name swap
VG Name rhel
LV UUID 1vqFco-Lxys-ZwR7-1M05-4E22-QQ1G-txfgUg
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/rhel/root
LV Name root
VG Name rhel
LV UUID 9I3kQe-7tJ4-H61H-ppmA-admB-WKqD-20F6oa
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 1
LV Size 17.51 GiB
Current LE 4482
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID 9EoISr-VUde-Ow95-MVhd-b0ka-ba5e-C7NMfF
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:40:22 +0800
LV Status available
# open 0
LV Size 100.00 MiB
Current LE 25
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:2
--- Logical volume ---
LV Path /dev/vg1/lv2
LV Name lv2
VG Name vg1
LV UUID jOwGw7-7PUW-e6GC-cIpG-WGm2-8gc7-Bf3t92
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:41:05 +0800
LV Status available
# open 0
LV Size 200.00 MiB
Current LE 50
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:3
[root@PC1linuxprobe dev]# lvcreate -n lv3 -L 300M vg1
Logical volume "lv3" created
[root@PC1linuxprobe dev]# lvdisplay
--- Logical volume ---
LV Path /dev/rhel/swap
LV Name swap
VG Name rhel
LV UUID 1vqFco-Lxys-ZwR7-1M05-4E22-QQ1G-txfgUg
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 2
LV Size 2.00 GiB
Current LE 512
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:1
--- Logical volume ---
LV Path /dev/rhel/root
LV Name root
VG Name rhel
LV UUID 9I3kQe-7tJ4-H61H-ppmA-admB-WKqD-20F6oa
LV Write Access read/write
LV Creation host, time localhost, 2020-11-05 23:23:01 +0800
LV Status available
# open 1
LV Size 17.51 GiB
Current LE 4482
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:0
--- Logical volume ---
LV Path /dev/vg1/lv1
LV Name lv1
VG Name vg1
LV UUID 9EoISr-VUde-Ow95-MVhd-b0ka-ba5e-C7NMfF
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:40:22 +0800
LV Status available
# open 0
LV Size 100.00 MiB
Current LE 25
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:2
--- Logical volume ---
LV Path /dev/vg1/lv2
LV Name lv2
VG Name vg1
LV UUID jOwGw7-7PUW-e6GC-cIpG-WGm2-8gc7-Bf3t92
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:41:05 +0800
LV Status available
# open 0
LV Size 200.00 MiB
Current LE 50
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:3
--- Logical volume ---
LV Path /dev/vg1/lv3
LV Name lv3
VG Name vg1
LV UUID 10tpyT-5z2e-to8J-6Y9U-gOED-Ogz7-7lTJ8l
LV Write Access read/write
LV Creation host, time PC1linuxprobe, 2020-11-08 16:41:17 +0800
LV Status available
# open 0
LV Size 300.00 MiB
Current LE 75
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 8192
Block device 253:4
查询此时的逻辑卷
[root@PC1linuxprobe dev]# lvscan
ACTIVE '/dev/rhel/swap' [2.00 GiB] inherit
ACTIVE '/dev/rhel/root' [17.51 GiB] inherit
ACTIVE '/dev/vg1/lv1' [100.00 MiB] inherit
ACTIVE '/dev/vg1/lv2' [200.00 MiB] inherit
ACTIVE '/dev/vg1/lv3' [300.00 MiB] inherit
9、删除逻辑卷lv3
[root@PC1linuxprobe dev]# lvremove /dev/vg1/lv3
Do you really want to remove active logical volume lv3? [y/n]: y
Logical volume "lv3" successfully removed
[root@PC1linuxprobe dev]# lvscan
ACTIVE '/dev/rhel/swap' [2.00 GiB] inherit
ACTIVE '/dev/rhel/root' [17.51 GiB] inherit
ACTIVE '/dev/vg1/lv1' [100.00 MiB] inherit
ACTIVE '/dev/vg1/lv2' [200.00 MiB] inherit
总结：
- 增加物理劵，pvcreate /dev/disk*
- 删除物理劵，pvremove /dev/disk*
- 卷组扩容，vgextend vg1 /dev/disk*
- 卷组缩容，vgreduce vg1 /dev/disk*
- 增加逻辑卷，lvcreate -n lvname -L xxM vgname
- 删除逻辑卷，lvremove /dev/vgname/lvname
