環境
[code lang=text] [root@n54l ~]# cat /etc/redhat-release CentOS release 6.7 (Final)
[root@n54l ~]# uname -a Linux n54l 2.6.32-573.7.1.el6.x86_64 #1 SMP Tue Sep 22 22:00:00 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux [/code]
LVMパーティションの作成 既存のLinux filesystemは消す
[code lang=text] [root@n54l ~]# gdisk /dev/sde GPT fdisk (gdisk) version 0.8.10
Partition table scan: MBR: protective BSD: not present APM: not present GPT: present
Found valid GPT with protective MBR; using GPT.
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): 2A1F05A5-51D7-4024-886D-8024AE096053 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name 1 2048 1953525134 931.5 GiB 8300 Linux filesystem
Command (? for help): d Using 1
Command (? for help):
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): 2A1F05A5-51D7-4024-886D-8024AE096053 Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 1953525101 sectors (931.5 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help): o This option deletes all partitions and creates a new protective MBR. Proceed? (Y/N): Y
Command (? for help):
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): C874634A-0A8E-4967-9ADB-2C1CBF2A66DB Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 1953525101 sectors (931.5 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): C874634A-0A8E-4967-9ADB-2C1CBF2A66DB Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 1953525101 sectors (931.5 GiB)
Number Start (sector) End (sector) Size Code Name
Command (? for help): n
Partition number (1-128, default 1):
First sector (34-1953525134, default = 2048) or {+-}size{KMGTP}:
Last sector (2048-1953525134, default = 1953525134) or {+-}size{KMGTP}:
Current type is 'Linux filesystem'
Hex code or GUID (L to show codes, Enter = 8300): L
0700 Microsoft basic data 0c01 Microsoft reserved 2700 Windows RE
3000 ONIE boot 3001 ONIE config 4100 PowerPC PReP boot
4200 Windows LDM data 4201 Windows LDM metadata 7501 IBM GPFS
7f00 ChromeOS kernel 7f01 ChromeOS root 7f02 ChromeOS reserved
8200 Linux swap 8300 Linux filesystem 8301 Linux reserved
8302 Linux /home 8400 Intel Rapid Start 8e00 Linux LVM
a500 FreeBSD disklabel a501 FreeBSD boot a502 FreeBSD swap
a503 FreeBSD UFS a504 FreeBSD ZFS a505 FreeBSD Vinum/RAID
a580 Midnight BSD data a581 Midnight BSD boot a582 Midnight BSD swap
a583 Midnight BSD UFS a584 Midnight BSD ZFS a585 Midnight BSD Vinum
a800 Apple UFS a901 NetBSD swap a902 NetBSD FFS
a903 NetBSD LFS a904 NetBSD concatenated a905 NetBSD encrypted
a906 NetBSD RAID ab00 Apple boot af00 Apple HFS/HFS+
af01 Apple RAID af02 Apple RAID offline af03 Apple label
af04 AppleTV recovery af05 Apple Core Storage be00 Solaris boot
bf00 Solaris root bf01 Solaris /usr & Mac Z bf02 Solaris swap
bf03 Solaris backup bf04 Solaris /var bf05 Solaris /home
bf06 Solaris alternate se bf07 Solaris Reserved 1 bf08 Solaris Reserved 2
bf09 Solaris Reserved 3 bf0a Solaris Reserved 4 bf0b Solaris Reserved 5
c001 HP-UX data c002 HP-UX service ea00 Freedesktop $BOOT
eb00 Haiku BFS ed00 Sony system partitio ed01 Lenovo system partit
Press the <Enter> key to see more codes: 8e00
ef00 EFI System ef01 MBR partition scheme ef02 BIOS boot partition
fb00 VMWare VMFS fb01 VMWare reserved fc00 VMWare kcore crash p
fd00 Linux RAID
Hex code or GUID (L to show codes, Enter = 8300): p
Hex code or GUID (L to show codes, Enter = 8300): 8e00
Changed type of partition to 'Linux LVM'
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): C874634A-0A8E-4967-9ADB-2C1CBF2A66DB Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name 1 2048 1953525134 931.5 GiB 8E00 Linux LVM
Command (? for help):
Command (? for help):
Command (? for help): p Disk /dev/sde: 1953525168 sectors, 931.5 GiB Logical sector size: 512 bytes Disk identifier (GUID): C874634A-0A8E-4967-9ADB-2C1CBF2A66DB Partition table holds up to 128 entries First usable sector is 34, last usable sector is 1953525134 Partitions will be aligned on 2048-sector boundaries Total free space is 2014 sectors (1007.0 KiB)
Number Start (sector) End (sector) Size Code Name 1 2048 1953525134 931.5 GiB 8E00 Linux LVM
Command (? for help): w
Final checks complete. About to write GPT data. THIS WILL OVERWRITE EXISTING PARTITIONS!!
Do you want to proceed? (Y/N): Y OK; writing new GUID partition table (GPT) to /dev/sde. The operation has completed successfully. [root@n54l ~]# [/code]
VGの作成
LVMパーティションをPVとして定義
[code lang=text] [root@n54l ~]# pvcreate /dev/sde1 Physical volume "/dev/sde1" successfully created [/code]
次にVGを作成します。 VGの名前をvg00（名前は任意の名前でかまわない）、PEのサイズは 16MB=1TB(16*65536) 32MB=2TBなので今回は２TBにしようと思う
持てるPE数には上限があり、最大65,536個まで PEの容量で小分けに分割されてそれらがLVに保存されるっぽい
値が大きすぎると無駄がでてきたりパフォーマンスに問題がでるらしい
[code lang=text] [root@n54l ~]# vgcreate -s32m vg00 /dev/sde1 Volume group "vg00" successfully created [/code]
確認
[code lang=text]
[root@n54l ~]# 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 931.50 GiB
PE Size 32.00 MiB
Total PE 29808
Alloc PE / Size 0 / 0
Free PE / Size 29808 / 931.50 GiB
VG UUID YUgik2-fDUF-Kth4-f6FL-ZHaL-4pKe-WkyNJQ
--- Volume group ---
VG Name vg_n54l
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 13.95 GiB
PE Size 4.00 MiB
Total PE 3571
Alloc PE / Size 3571 / 13.95 GiB
Free PE / Size 0 / 0
VG UUID y72IAb-1Wyt-TgF2-m7Z4-LuYY-nGd5-fj71xS
[/code]
1つのPVを1つのVGに割り当てましたが、複数のPVをVGに割り当てることでVGの拡張が可能になります。
LVの作成
構成
[code lang=text] LV name size lv00 500GB lv01 300GB lv02 100GB [/code]
コマンド
[code lang=text] [root@n54l ~]# lvcreate -nlv00 -L500g vg00 Logical volume "lv00" created. [root@n54l ~]# lvcreate -nlv01 -L300g vg00 Logical volume "lv01" created. [root@n54l ~]# lvcreate -nlv02 -L100g vg00 Logical volume "lv02" created. [root@n54l ~]# [/code]
確認
[code lang=text] [root@n54l ~]# lvdisplay --- Logical volume --- LV Path /dev/vg00/lv00 LV Name lv00 VG Name vg00 LV UUID Iy1OZo-zjFf-QwkK-wute-9isl-CpfG-jrM1Ca LV Write Access read/write LV Creation host, time n54l, 2015-10-30 18:01:12 +0900 LV Status available # open 0 LV Size 500.00 GiB Current LE 16000 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2
--- Logical volume --- LV Path /dev/vg00/lv01 LV Name lv01 VG Name vg00 LV UUID DlKMv9-x364-UVzl-Hf2o-NGBB-0WCG-r67dSy LV Write Access read/write LV Creation host, time n54l, 2015-10-30 18:01:18 +0900 LV Status available # open 0 LV Size 300.00 GiB Current LE 9600 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:3
--- Logical volume --- LV Path /dev/vg00/lv02 LV Name lv02 VG Name vg00 LV UUID 6gOaKA-VeXR-DQ3C-CyUl-Rj0E-Rh6O-KurusT LV Write Access read/write LV Creation host, time n54l, 2015-10-30 18:01:18 +0900 LV Status available # open 0 LV Size 100.00 GiB Current LE 3200 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:4
--- Logical volume --- LV Path /dev/vg_n54l/lv_root LV Name lv_root VG Name vg_n54l LV UUID E6UHup-pXWk-17nB-v7Tp-eyXu-XRqS-TLtOr8 LV Write Access read/write LV Creation host, time n54l, 2015-06-10 22:33:56 +0900 LV Status available # open 1 LV Size 10.20 GiB Current LE 2611 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0
--- Logical volume --- LV Path /dev/vg_n54l/lv_swap LV Name lv_swap VG Name vg_n54l LV UUID 6BfRmA-cvMo-nIn9-Pcbk-I5pt-mG42-J1ZK0w LV Write Access read/write LV Creation host, time n54l, 2015-06-10 22:35:24 +0900 LV Status available # open 1 LV Size 3.75 GiB Current LE 960 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1
[root@n54l ~]# [/code]
Vol00が足りなくなった時に追加する分が欲しいので先に /dev/vg00/lv02を削除することにした
[code lang=text] [root@n54l ~]# lvremove /dev/vg00/lv02 Do you really want to remove active logical volume lv02? [y/n]: y Logical volume "lv02" successfully removed [/code]
構成
[code lang=text] LV name size lv00 500GB lv01 300GB [/code]
ファイルシステムの設定
どちらもxfsで設定します。
[code lang=text]
[root@n54l ~]# mkfs.xfs /dev/vg00/lv0
lv00 lv01
[root@n54l ~]# mkfs.xfs /dev/vg00/lv00
meta-data=/dev/vg00/lv00 isize=256 agcount=16, agsize=8192000 blks
= sectsz=4096 attr=2, projid32bit=0
data = bsize=4096 blocks=131072000, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=64000, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@n54l ~]#
[root@n54l ~]#
[root@n54l ~]#
[root@n54l ~]# mkfs.xfs /dev/vg00/lv01
meta-data=/dev/vg00/lv01 isize=256 agcount=16, agsize=4915200 blks
= sectsz=4096 attr=2, projid32bit=0
data = bsize=4096 blocks=78643200, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0
log =internal log bsize=4096 blocks=38400, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
[root@n54l ~]#
[/code]
mount
mountする場所を作る
[code lang=text] [root@n54l ~]# mkdir -p /vg00/lv00 [root@n54l ~]# mkdir -p /vg00/lv01 [/code]
fstabに書くのを確認
[code lang=text] [root@n54l ~]# ls /dev/mapper/ control vg00-lv00 vg00-lv01 vg_n54l-lv_root vg_n54l-lv_swap [/code]
/etc/fstabに追記してmountする
[code lang=text] [root@n54l ~]# tail -n 2 /etc/fstab /dev/mapper/vg00-lv00 /vg00/lv00 xfs defaults 0 0 /dev/mapper/vg00-lv01 /vg00/lv01 xfs defaults 0 0
[root@n54l ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_n54l-lv_root 10G 4.5G 5.0G 48% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 477M 133M 319M 30% /boot /dev/sdb1 1.8T 687G 1.1T 40% /hdd1 /dev/sdc1 917G 428G 443G 50% /hdd2 /dev/sdf1 233G 50G 183G 22% /ssd1 /dev/sdd1 932G 772G 161G 83% /hdd3 [root@n54l ~]# mount -a [root@n54l ~]# [root@n54l ~]# [root@n54l ~]# df -h Filesystem Size Used Avail Use% Mounted on /dev/mapper/vg_n54l-lv_root 10G 4.5G 5.0G 48% / tmpfs 1.9G 0 1.9G 0% /dev/shm /dev/sda1 477M 133M 319M 30% /boot /dev/sdb1 1.8T 687G 1.1T 40% /hdd1 /dev/sdc1 917G 428G 443G 50% /hdd2 /dev/sdf1 233G 50G 183G 22% /ssd1 /dev/sdd1 932G 772G 161G 83% /hdd3 /dev/mapper/vg00-lv00 500G 33M 500G 1% /vg00/lv00 /dev/mapper/vg00-lv01 300G 33M 300G 1% /vg00/lv01 [root@n54l ~]# [root@n54l ~]# [/code]
ディスクが足りなくなったりした時の追加手順やスナップショットはまた後日
