XENserver - lokale DatenLV erstellen

Um lokale Backups oder andere Sachen bequem ablegen zu können, empfiehlt es sich, eine eigenes Volume zu erzeugen.

Zunächst läßt man sich mittels vgs die verfügbaren Volumegroups anzeigen.

# vgs
VG #PV #LV #SN Attr VSize VFree
VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 1 8 0 wz--n- 457.99G 229.39G

Jetzt kann man in die bestehende VG ein logisches Volume "datalv" erstellen.

# lvcreate -v -L 200G -n datalv VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68
Finding volume group "VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68"
Archiving volume group "VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68" metadata (seqno 10).
Creating logical volume datalv
Creating volume group backup "/etc/lvm/backup/VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68" (seqno 11).
Found volume group "VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68"
Creating VG_XenStorage--05311684--f218--401a--0caa--dfcce1a83d68-datalv
Loading VG_XenStorage--05311684--f218--401a--0caa--dfcce1a83d68-datalv table
Resuming VG_XenStorage--05311684--f218--401a--0caa--dfcce1a83d68-datalv (252:6)
Clearing start of logical volume "datalv"
Creating volume group backup "/etc/lvm/backup/VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68" (seqno 11).
Logical volume "datalv" created

Die LVs sind noch zu aktivieren, so dass der Host auch Zugriff darauf hat:

# vgchange -ay
8 logical volume(s) in volume group "VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68" now active

Nun noch ein Dateisystem drauf und mounten und das LV steht bereit.

# lvs
LV VG Attr LSize Origin Snap% Move Log Copy%
LV-0da77540-0ce3-4293-9718-768d36e5e908 VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 8.50G
LV-278f5146-bbea-4220-b216-24ef76f5a8ef VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 4.00G
LV-5cf27ec2-e798-4304-affc-5b7a3dee7e27 VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-a- 4.80G
LV-6a4ef2ab-c78f-4de7-ba9d-5d048a7941a6 VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 820.00M
LV-80b296d2-9b88-4f98-b3ef-4122d8765374 VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 9.50G
LV-9ef4f2e6-23bd-415d-acc0-f8efef3603ef VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 512.00M
LV-a79deac9-8dfe-4136-95a0-4d5fc6adae12 VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-ao 512.00M
datalv VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68 -wi-a- 200.00G

# mkfs.ext3 /dev/VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68/datalv
mke2fs 1.39 (29-May-2006)
Filesystem label=
OS type: Linux
Block size=4096 (log=2)
Fragment size=4096 (log=2)
26214400 inodes, 52428800 blocks
2621440 blocks (5.00%) reserved for the super user
First data block=0
Maximum filesystem blocks=0
1600 block groups
32768 blocks per group, 32768 fragments per group
16384 inodes per group
Superblock backups stored on blocks:
32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208,
4096000, 7962624, 11239424, 20480000, 23887872

Writing inode tables: 696/1600
...

disable FS-Check

tune2fs -c0 -i0 /dev/VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68/datalv

mount

# mkdir -p /data
# mount /dev/VG_XenStorage-05311684-f218-401a-0caa-dfcce1a83d68/datalv /data

df -h

Filesystem Size Used Avail Use% Mounted on
/dev/sda1 3.8G 1.7G 1.9G 48% /
none 377M 0 377M 0% /dev/shm
/dev/mapper/VG_XenStorage--05311684--f218--401a--0caa--dfcce1a83d68-datalv
197G 188M 187G 1% /data