LVM でディスクの拡張と追加をやってみる
概要
LVM のディスク追加と領域拡張の作業があったので、そのための検証のメモ。 環境は Ubuntu18.04 。 /dev/sda がLVM用のディスクで、/dev/sdb がブートディスク。
ツールのインストール
パーティション /dev/sda1 作成
$ sudo parted -s /dev/sda mklabel gpt
$ sudo parted -s /dev/sda mkpart "pv0" "" 0% 20GiB
$ sudo parted -s /dev/sda set 1 lvm on$ sudo parted -s /dev/sda p
Model: ATA SanDisk SDSSDH32 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 21.5GB 21.5GB pv0 lvmPV /dev/sda1 の作成
$ sudo pvdisplay
"/dev/sda1" is a new physical volume of "<20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda1
VG Name
PV Size <20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID wLhaUz-JLey-L2hO-SgtX-lm8y-sioj-hEXELyVG /dev/vg00 の作成
$ sudo vgdisplay
--- Volume group ---
VG Name vg00
System ID
Format lvm2
Metadata Areas 1
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 1
Act PV 1
VG Size <20.00 GiB
PE Size 4.00 MiB
Total PE 5119
Alloc PE / Size 0 / 0
Free PE / Size 5119 / <20.00 GiB
VG UUID t34tOI-eXcM-RL2C-FsiG-jk0n-Lxw2-pyXuSbLV /dev/vg00/vol00 の作成
今回はシンプロビジョニングをしたかったので、 vg00/tp というシンプールをまず作成。
$ lvcreate --thinpool tp -L 10G vg00
Using default stripesize 64.00 KiB.
Thin pool volume with chunk size 64.00 KiB can address at most 15.81 TiB of data.
Logical volume "tp" created.次にvol00を作成する。 シンプロビジョニングなので、物理パーティション20GiBよりも大きく100GiBで作成した。
$ sudo lvcreate --thin -V 100G -n vol00 vg00/tp
Using default stripesize 64.00 KiB.
WARNING: Sum of all thin volume sizes (100.00 GiB) exceeds the size of thin pool vg00/tp and the size of whole volume group (<20.00 GiB).
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Logical volume "vol00" created.$ sudo lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
tp vg00 twi-aotz-- 10.00g 0.00 0.65
vol00 vg00 Vwi-a-tz-- 100.00g tp 0.00lsblkをすると↓のようになった。
$ lsblk /dev/sda
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 232.9G 0 disk
└─sda1 8:1 0 20G 0 part
├─vg00-tp_tmeta 253:0 0 12M 0 lvm
│ └─vg00-tp-tpool 253:2 0 10G 0 lvm
│ ├─vg00-tp 253:3 0 10G 0 lvm
│ └─vg00-vol00 253:4 0 100G 0 lvm
└─vg00-tp_tdata 253:1 0 10G 0 lvm
└─vg00-tp-tpool 253:2 0 10G 0 lvm
├─vg00-tp 253:3 0 10G 0 lvm
└─vg00-vol00 253:4 0 100G 0 lvmLV /dev/vg00/vol00 を XFS でフォーマット
LVMで作成したブロックデバイスを下記のようにして XFS でフォーマットできる。
$ sudo mkfs.xfs /dev/vg00/vol00
meta-data=/dev/vg00/vol00 isize=512 agcount=16, agsize=1638384 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=0, rmapbt=0, reflink=0
data = bsize=4096 blocks=26214144, imaxpct=25
= sunit=16 swidth=16 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=12800, version=2
= sectsz=512 sunit=16 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0下記のようにしてマウントできる。
パーティション /dev/sda1 をリサイズ
/dev/sda1を 20GiB -> 40GiB にリサイズしてみる。
$ sudo parted /dev/sda -s p
Model: ATA SanDisk SDSSDH32 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 42.9GB 42.9GB pv0 lvmPV /dev/sda1 をリサイズ
$ sudo pvresize /dev/sda1
Physical volume "/dev/sda1" changed
1 physical volume(s) resized / 0 physical volume(s) not resized$ sudo pvdisplay
--- Physical volume ---
PV Name /dev/sda1
VG Name vg00
PV Size <40.00 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 10239
Free PE 7673
Allocated PE 2566
PV UUID os4006-QsYX-O5wL-IsJo-DWDM-7dyr-EiPbBwLV シンプール vg00/tp をリサイズ
$ sudo lvresize -L +20G vg00/tp
WARNING: Sum of all thin volume sizes (100.00 GiB) exceeds the size of thin pools and the size of whole volume group (<40.00 GiB).
WARNING: You have not turned on protection against thin pools running out of space.
WARNING: Set activation/thin_pool_autoextend_threshold below 100 to trigger automatic extension of thin pools before they get full.
Size of logical volume vg00/tp_tdata changed from 10.00 GiB (2560 extents) to 30.00 GiB (7680 extents).
Logical volume vg00/tp_tdata successfully resized.$ lvdisplay
--- Logical volume ---
LV Name tp
VG Name vg00
LV UUID gJkkUJ-uO6E-st69-ElcX-UR6j-QI1b-ivNQdx
LV Write Access read/write
LV Creation host, time xhost, 2018-05-21 22:58:49 +0900
LV Pool metadata tp_tmeta
LV Pool data tp_tdata
LV Status available
# open 2
LV Size 30.00 GiB
Allocated pool data 0.17%
Allocated metadata 1.50%
Current LE 7680
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:2
--- Logical volume ---
LV Path /dev/vg00/vol00
LV Name vol00
VG Name vg00
LV UUID dcMtdS-FlWr-bfxP-sTPW-PK6Q-lctF-VdFfBd
LV Write Access read/write
LV Creation host, time xhost, 2018-05-21 22:59:21 +0900
LV Pool name tp
LV Status available
# open 0
LV Size 100.00 GiB
Mapped size 0.05%
Current LE 25600
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 253:4LV /dev/vg00/vol00 のファイルシステムをリサイズ
$ sudo xfs_growfs /dev/vg00/vol00
meta-data=/dev/mapper/vg00-vol00 isize=512 agcount=16, agsize=1638384 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1 spinodes=0 rmapbt=0
= reflink=0
data = bsize=4096 blocks=26214144, imaxpct=25
= sunit=16 swidth=16 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal bsize=4096 blocks=12800, version=2
= sectsz=512 sunit=16 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 26214144 to 26214400パーティション /dev/sda2 の追加
sudo parted -a optimal -s /dev/sda unit s p
Model: ATA SanDisk SDSSDH32 (scsi)
Disk /dev/sda: 488397168s
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 2048s 83886080s 83884033s pv0 lvm$ sudo parted -s /dev/sda p
Model: ATA SanDisk SDSSDH32 (scsi)
Disk /dev/sda: 250GB
Sector size (logical/physical): 512B/512B
Partition Table: gpt
Disk Flags:
Number Start End Size File system Name Flags
1 1049kB 42.9GB 42.9GB pv0 lvm
2 42.9GB 64.4GB 21.5GB pv1 lvmPV /dev/sda2 を追加
$ sudo pvdisplay
--- Physical volume ---
PV Name /dev/sda1
VG Name vg00
PV Size <40.00 GiB / not usable 2.00 MiB
Allocatable yes
PE Size 4.00 MiB
Total PE 10239
Free PE 2553
Allocated PE 7686
PV UUID os4006-QsYX-O5wL-IsJo-DWDM-7dyr-EiPbBw
"/dev/sda2" is a new physical volume of "<20.00 GiB"
--- NEW Physical volume ---
PV Name /dev/sda2
VG Name
PV Size <20.00 GiB
Allocatable NO
PE Size 0
Total PE 0
Free PE 0
Allocated PE 0
PV UUID xOAb5N-WZxA-y0Uk-mdJY-2e2u-Qgb8-6y0W9rVG vg00に PV /dev/sda2 を追加
$ sudo vgdisplay
--- Volume group ---
VG Name vg00
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 7
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 1
Open LV 1
Max PV 0
Cur PV 2
Act PV 2
VG Size 59.99 GiB
PE Size 4.00 MiB
Total PE 15358
Alloc PE / Size 7686 / 30.02 GiB
Free PE / Size 7672 / <29.97 GiB
VG UUID t34tOI-eXcM-RL2C-FsiG-jk0n-Lxw2-pyXuSb