계속 까먹어서 정리해야겠음..
참고.
http://blog.daum.net/99lib/9
http://blog.boxcorea.com/wp/archives/448
https://wiki.gentoo.org/wiki/LVM/ko
# LVM
: Logical Volume Manager
- 여러 물리적인 디스크를 하나의 논리적인 디스크처럼 사용할 수 있음. (RAID와 비슷)
- raid처럼 parity, mirroring등을 지원하지 않음
- 하지만 RAID보다 비교적 관리가 쉽고, 확장성, 안정성, 효율, 스냅샷지원 등의 이유에서 많이 사용됨
출처. http://ivanvillareal.com/linux/migrate-from-direct-partition-to-lvm/
1. Hard Drives -> Paritions
: LVM 타입으로 파티션 생성 (생략 가능한 듯)
# fdisk /dev/sda
(8e, linux LVM)
2. Partitions -> PV
: 물리볼륨을 생성
# pvcreate /dev/sda1
Physical volume "/dev/sda1" successfully created
# pvdisplay
3. PV -> VG
: 볼륨그룹을 생성
# vgcreate myVolumeGroup /dev/sda1 [나머지 PV들 나열]
Volume group "myVolumeGroup" successfully created
# vgdisplay
4. VG -> LV
: 논리볼륨을 생성
# lvcreate -n lv1 -L 5GB myVolumeGroup
Logical volume "lv1" created
# lvcreate -n lv2 -l 100%FREE myVolumeGroup
Logical volume "lv2" created
# lvdisplay
5. File System
: 파일시스템 포맷 및 마운트
# mkfs.ex4 /dev/myVolumeGroup /lv1
# mkfs.ex4 /dev/myVolumeGroup /lv2
# mkdir /mnt/volume1
# mkdir /mnt/volume2
# mount -t ext4 /dev/myVolumeGroup /lv1 /mnt/volume1
# mount -t ext4 /dev/myVolumeGroup /lv2 /mnt/volume2
( # mount -a)
# df -l
(# df -f)
# vi /etc/fstab
/dev/myVolumeGroup /mnt/volume1 ext4 0 0
( UUID=(위에서 확인한 uuid) /srv/repository ext4 errors=remount-ro 0 1)
--------------------------------------------------------------------------------------------------------------------------------------------------------------
root@controller:~# fdisk -l
Disk /dev/sda: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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: 0x000bf3f3
Device Boot Start End Blocks Id System
/dev/sda1 2048 390625279 195311616 fd Linux raid autodetect
/dev/sda2 390625280 878907391 244141056 fd Linux raid autodetect
/dev/sda3 937711616 976771071 19529728 fd Linux raid autodetect
/dev/sda4 878907392 937711615 29402112 fd Linux raid autodetect
Partition table entries are not in disk order
Disk /dev/sdb: 500.1 GB, 500107862016 bytes
255 heads, 63 sectors/track, 60801 cylinders, total 976773168 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: 0x000d3a7b
Device Boot Start End Blocks Id System
/dev/sdb1 * 2048 390625279 195311616 fd Linux raid autodetect
/dev/sdb2 390625280 878907391 244141056 fd Linux raid autodetect
/dev/sdb3 937711616 976771071 19529728 fd Linux raid autodetect
/dev/sdb4 878907392 937711615 29402112 fd Linux raid autodetect
Partition table entries are not in disk order
Disk /dev/md1: 500.0 GB, 499999834112 bytes * RAID 0으로 구성한 md1을 Linux LVM으로 바꾸었었는데
2 heads, 4 sectors/track, 122070272 cylinders, total 976562176 sectors 이런 경우 어떤의미를 가지는지 생각해봐야 할 듯.
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x0357007d
Device Boot Start End Blocks Id System
/dev/md1p1 2048 976562175 488280064 8e Linux LVM
Disk /dev/md2: 40.0 GB, 39995834368 bytes
2 heads, 4 sectors/track, 9764608 cylinders, total 78116864 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
Disk /dev/md2 doesn't contain a valid partition table
Disk /dev/md3: 60.2 GB, 60214476800 bytes
2 heads, 4 sectors/track, 14700800 cylinders, total 117606400 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 524288 bytes / 1048576 bytes
Disk identifier: 0x00000000
Disk /dev/md3 doesn't contain a valid partition table
* 기존에 RAID 0 으로 설정했던 md0을 cinder-volumes로 사용하기 위하여 LVM physical volume으로 생성하기 위해 일단 "mdadm –manage –stop /dev/md0"으로 md를 중지 후"pvcreate"로 physical volume 생성
* cinder volume 생성한 것
// 1GB 짜리
Disk /dev/mapper/cinder--volumes-volume--ee1bc346--f489--42c4--b73a--135e97acf2b4: 1073 MB, 1073741824 bytes
255 heads, 63 sectors/track, 130 cylinders, total 2097152 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/cinder--volumes-volume--ee1bc346--f489--42c4--b73a--135e97acf2b4 doesn't contain a valid partition table
Disk /dev/mapper/cinder--volumes-volume--5d6c6e13--f9e3--4146--9df2--ffbe312599c1: 21.5 GB, 21474836480 bytes
255 heads, 63 sectors/track, 2610 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/mapper/cinder--volumes-volume--5d6c6e13--f9e3--4146--9df2--ffbe312599c1 doesn't contain a valid partition table
# cinder volume 삭제하는데 오래걸리는 구나
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