LV拡張のメモ（さくらのクラウド）
Nid: 88
ルート（/）のサイズを20GBから40GBに拡張。Ubuntu Linux OS。
LVMを使用しているので、概念の把握が難しい。
多くの場合、PVがディスク装置と1対1に対応し、LVがマウントポイントに対応する。
VG +-------------------------------+ | PV PV PV | | +-------+ +-------+ +-------+ | | | | | | | | | | | +-----------------------+ | | | | | | | | | | | LV | | | | | | | | | | | +-----------------------+ | | | | | | | | | | | +-------+ +-------+ +-------+ | | | +-------------------------------+
参考情報
http://ja.wikipedia.org/wiki/%E8%AB%96%E7%90%86%E3%83%9C%E3%83%AA%E3%83%A5%E3%83%BC%E3%83%A0%E3%83%9E%E3%83%8D%E3%83%BC%E3%82%B8%E3%83%A3
https://access.redhat.com/site/documentation/ja-JP/Red_Hat_Enterprise_Linux/6/html/Storage_Administration_Guide/ch-lvm.html
https://access.redhat.com/site/documentation/ja-JP/Red_Hat_Enterprise_Linux/6/html/Logical_Volume_Manager_Administration/lv_extend.html
http://qiita.com/g_maeda/items/3602dc2f7af3f711f9c4
情報確認
$ sudo pvscan PV /dev/vda5 VG ubuntu-vg lvm2 [19.76 GiB / 20.00 MiB free] Total: 1 [19.76 GiB] / in use: 1 [19.76 GiB] / in no VG: 0 [0 ] $ sudo vgscan Reading all physical volumes. This may take a while... Found volume group "ubuntu-vg" using metadata type lvm2 $ sudo lvscan ACTIVE '/dev/ubuntu-vg/root' [18.74 GiB] inherit ACTIVE '/dev/ubuntu-vg/swap_1' [1020.00 MiB] inherit $ sudo fdisk -l Disk /dev/vda: 21.5 GB, 21474836480 bytes 16 heads, 63 sectors/track, 41610 cylinders, total 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 identifier: 0x000cffa1 Device Boot Start End Blocks Id System /dev/vda1 * 2048 499711 248832 83 Linux /dev/vda2 501758 41940991 20719617 5 Extended /dev/vda5 501760 41940991 20719616 8e Linux LVM Disk /dev/vdb: 21.5 GB, 21474836480 bytes 16 heads, 63 sectors/track, 41610 cylinders, total 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 identifier: 0x00000000 Disk /dev/vdb doesn't contain a valid partition table Disk /dev/mapper/ubuntu--vg-root: 20.1 GB, 20124270592 bytes 255 heads, 63 sectors/track, 2446 cylinders, total 39305216 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 identifier: 0x00000000 Disk /dev/mapper/ubuntu--vg-root doesn't contain a valid partition table Disk /dev/mapper/ubuntu--vg-swap_1: 1069 MB, 1069547520 bytes 255 heads, 63 sectors/track, 130 cylinders, total 2088960 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 identifier: 0x00000000 Disk /dev/mapper/ubuntu--vg-swap_1 doesn't contain a valid partition table
ディスクフォーマット
$ sudo fdisk /dev/vdb
Device contains neither a valid DOS partition table, nor Sun, SGI or OSF disklabel
Building a new DOS disklabel with disk identifier 0x4f02bed1.
Changes will remain in memory only, until you decide to write them.
After that, of course, the previous content won't be recoverable.
Warning: invalid flag 0x0000 of partition table 4 will be corrected by w(rite)
Command (m for help): t
No partition is defined yet!
Command (m for help): n
Partition type:
p primary (0 primary, 0 extended, 4 free)
e extended
Select (default p): p
Partition number (1-4, default 1):
Using default value 1
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
Command (m for help): t
Selected partition 1
Hex code (type L to list codes): L
0 Empty 24 NEC DOS 81 Minix / old Lin bf Solaris
1 FAT12 27 Hidden NTFS Win 82 Linux swap / So c1 DRDOS/sec (FAT-
2 XENIX root 39 Plan 9 83 Linux c4 DRDOS/sec (FAT-
3 XENIX usr 3c PartitionMagic 84 OS/2 hidden C: c6 DRDOS/sec (FAT-
4 FAT16 <32M 40 Venix 80286 85 Linux extended c7 Syrinx
5 Extended 41 PPC PReP Boot 86 NTFS volume set da Non-FS data
6 FAT16 42 SFS 87 NTFS volume set db CP/M / CTOS / .
7 HPFS/NTFS/exFAT 4d QNX4.x 88 Linux plaintext de Dell Utility
8 AIX 4e QNX4.x 2nd part 8e Linux LVM df BootIt
9 AIX bootable 4f QNX4.x 3rd part 93 Amoeba e1 DOS access
a OS/2 Boot Manag 50 OnTrack DM 94 Amoeba BBT e3 DOS R/O
b W95 FAT32 51 OnTrack DM6 Aux 9f BSD/OS e4 SpeedStor
c W95 FAT32 (LBA) 52 CP/M a0 IBM Thinkpad hi eb BeOS fs
e W95 FAT16 (LBA) 53 OnTrack DM6 Aux a5 FreeBSD ee GPT
f W95 Ext'd (LBA) 54 OnTrackDM6 a6 OpenBSD ef EFI (FAT-12/16/
10 OPUS 55 EZ-Drive a7 NeXTSTEP f0 Linux/PA-RISC b
11 Hidden FAT12 56 Golden Bow a8 Darwin UFS f1 SpeedStor
12 Compaq diagnost 5c Priam Edisk a9 NetBSD f4 SpeedStor
14 Hidden FAT16 <3 61 SpeedStor ab Darwin boot f2 DOS secondary
16 Hidden FAT16 63 GNU HURD or Sys af HFS / HFS+ fb VMware VMFS
17 Hidden HPFS/NTF 64 Novell Netware b7 BSDI fs fc VMware VMKCORE
18 AST SmartSleep 65 Novell Netware b8 BSDI swap fd Linux raid auto
1b Hidden W95 FAT3 70 DiskSecure Mult bb Boot Wizard hid fe LANstep
1c Hidden W95 FAT3 75 PC/IX be Solaris boot ff BBT
1e Hidden W95 FAT1 80 Old Minix
Hex code (type L to list codes): 8e
Changed system type of partition 1 to 8e (Linux LVM)
Command (m for help): p
Disk /dev/vdb: 21.5 GB, 21474836480 bytes
16 heads, 63 sectors/track, 41610 cylinders, total 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 identifier: 0x4f02bed1
Device Boot Start End Blocks Id System
/dev/vdb1 2048 41943039 20970496 8e Linux LVM
Command (m for help): w
The partition table has been altered!
Calling ioctl() to re-read partition table.
Syncing disks.
物理ボリュームPVを作成
$ sudo pvcreate /dev/vdb1 Physical volume "/dev/vdb1" successfully created
作成を確認
$ sudo vgdisplay --- Volume group --- VG Name ubuntu-vg 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 19.76 GiB PE Size 4.00 MiB Total PE 5058 Alloc PE / Size 5053 / 19.74 GiB Free PE / Size 5 / 20.00 MiB VG UUID QE4bbJ-Su9O-awQ4-e2qM-QPTZ-7Frc-XU7hR7
VGに作成したPVを追加
$ sudo vgextend ubuntu-vg /dev/vdb1 Volume group "ubuntu-vg" successfully extended
確認
$ sudo vgdisplay -v ubuntu-vg
Using volume group(s) on command line
Finding volume group "ubuntu-vg"
--- Volume group ---
VG Name ubuntu-vg
System ID
Format lvm2
Metadata Areas 2
Metadata Sequence No 4
VG Access read/write
VG Status resizable
MAX LV 0
Cur LV 2
Open LV 2
Max PV 0
Cur PV 2
Act PV 2
VG Size 39.75 GiB
PE Size 4.00 MiB
Total PE 10177
Alloc PE / Size 5053 / 19.74 GiB
Free PE / Size 5124 / 20.02 GiB
VG UUID QE4bbJ-Su9O-awQ4-e2qM-QPTZ-7Frc-XU7hR7
--- Logical volume ---
LV Path /dev/ubuntu-vg/root
LV Name root
VG Name ubuntu-vg
LV UUID zxv7dF-3xLh-Leda-l1AV-0w0Y-tVbR-UfPnMx
LV Write Access read/write
LV Creation host, time ubuntu, 2014-04-25 00:49:40 +0900
LV Status available
# open 1
LV Size 18.74 GiB
Current LE 4798
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:0
--- Logical volume ---
LV Path /dev/ubuntu-vg/swap_1
LV Name swap_1
VG Name ubuntu-vg
LV UUID aL7YyM-AVtB-QsMR-lkRf-d6Dz-cX7h-MfHEvZ
LV Write Access read/write
LV Creation host, time ubuntu, 2014-04-25 00:49:40 +0900
LV Status available
# open 2
LV Size 1020.00 MiB
Current LE 255
Segments 1
Allocation inherit
Read ahead sectors auto
- currently set to 256
Block device 252:1
--- Physical volumes ---
PV Name /dev/vda5
PV UUID sKd1AJ-nq6b-xBa1-ZHky-8q9N-Lvpy-xWcdVy
PV Status allocatable
Total PE / Free PE 5058 / 5
PV Name /dev/vdb1
PV UUID CdjnbP-ltbz-VJCf-Zmew-38bM-z8vx-PZ4p1y
PV Status allocatable
Total PE / Free PE 5119 / 5119
論理ボリュームLVの拡張
$ sudo lvextend -l +100%FREE /dev/ubuntu-vg/root Extending logical volume root to 38.76 GiB Logical volume root successfully resized
ファイルシステムの拡張
$ sudo resize2fs /dev/ubuntu-vg/root resize2fs 1.42.9 (4-Feb-2014) Filesystem at /dev/ubuntu-vg/root is mounted on /; on-line resizing required old_desc_blocks = 2, new_desc_blocks = 3 The filesystem on /dev/ubuntu-vg/root is now 10160128 blocks long.
確認
$ sudo vgdisplay --- Volume group --- VG Name ubuntu-vg System ID Format lvm2 Metadata Areas 2 Metadata Sequence No 5 VG Access read/write VG Status resizable MAX LV 0 Cur LV 2 Open LV 2 Max PV 0 Cur PV 2 Act PV 2 VG Size 39.75 GiB PE Size 4.00 MiB Total PE 10177 Alloc PE / Size 5375 / 21.00 GiB Free PE / Size 4802 / 18.76 GiB VG UUID QE4bbJ-Su9O-awQ4-e2qM-QPTZ-7Frc-XU7hR7 $ sudo vgdisplay | grep PE PE Size 4.00 MiB Total PE 10177 Alloc PE / Size 10177 / 39.75 GiB Free PE / Size 0 / 0 $ df -h Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/ubuntu--vg-root ext4 39G 17G 21G 45% / proc proc 0 0 0 - /proc sysfs sysfs 0 0 0 - /sys none tmpfs 4.0K 0 4.0K 0% /sys/fs/cgroup none fusectl 0 0 0 - /sys/fs/fuse/connections none debugfs 0 0 0 - /sys/kernel/debug none securityfs 0 0 0 - /sys/kernel/security udev devtmpfs 1.5G 4.0K 1.5G 1% /dev devpts devpts 0 0 0 - /dev/pts tmpfs tmpfs 302M 376K 301M 1% /run none tmpfs 5.0M 0 5.0M 0% /run/lock none tmpfs 1.5G 0 1.5G 0% /run/shm none tmpfs 100M 0 100M 0% /run/user none pstore 0 0 0 - /sys/fs/pstore /dev/vda1 ext2 236M 66M 158M 30% /boot systemd cgroup 0 0 0 - /sys/fs/cgroup/systemd