Quando installate CentOS7 di default installa delle partizioni divise per root e home come di seguito riportato: # lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT fd0 2:0 1 4K 0 disk sda 8:0 0 70G 0 disk ├─sda1 8:1 0 500M 0 part /boot └─sda2 8:2 0 69.5G 0 part ├─centos-swap 253:0 0 2G 0 lvm [SWAP] ├─centos-root 253:1 0 45.3G 0 lvm / └─centos-home 253:2 0 22.1G 0 lvm /home sr0 11:0 1 1024M 0 rom
come si può evincere la Home ha 22.1 gb di spazio e la root 45.3 gb.
Quello che andremo a fare sarà eliminare la partizione home e incrementare lo spazio della directory root
Come prima cosa iniziamo a fare un backup di tutti i dati presenti su tutte le partizioni onde evitare che in caso di errori sulla procedura si possano perdere informazioni importanti. Ricordatevi di salvare tutto ciò che è presente nella directory home in quanto la stessa sarà eliminata definitivamente.
Iniziamo con smontare la Partizione centos-home
# umount /home/
Adesso vediamo i volumi logici
# lvdisplay --- Logical volume --- LV Path /dev/centos/root LV Name root VG Name centos LV UUID H8tAWA-f5nF-iBXR-Ew3L-djcI-4Vpg-zcjsPK LV Write Access read/write LV Creation host, time localhost, 2015-07-20 05:28:54 -0400 LV Status available # open 1 LV Size 45.34 GiB Current LE 11607 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:1 --- Logical volume --- LV Path /dev/centos/home LV Name home VG Name centos LV UUID VvIe9h-ZdOF-KvhU-PDLZ-zpXD-rrMV-MTAwSA LV Write Access read/write LV Creation host, time localhost, 2015-07-20 05:28:54 -0400 LV Status available # open 0 LV Size 22.14 GiB Current LE 5667 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:2 --- Logical volume --- LV Path /dev/centos/swap LV Name swap VG Name centos LV UUID 1C22cf-Mq0r-5cDY-YX5T-d7sh-tMLu-zbAxAh LV Write Access read/write LV Creation host, time localhost, 2015-07-20 05:28:55 -0400 LV Status available # open 2 LV Size 2.03 GiB Current LE 520 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 253:0
Rimuoviamo il volume logico centos-home
# lvremove /dev/centos/home Do you really want to remove active logical volume home? [y/n]: y Logical volume "home" successfully removed Adesso controlliamo lo spazio disponibile con il comando vgs # vgs VG #PV #LV #SN Attr VSize VFree centos 1 2 0 wz--n- 69.51g 22.14g
Adesso ridimensionamo la partizione centos-root
# lvextend --size +22.13GB -r /dev/mapper/centos-root
Rounding size to boundary between physical extents: 22.13 GiB
Extending logical volume root to 67.47 GiB
Logical volume root successfully resized
meta-data=/dev/mapper/centos-root isize=256 agcount=4, agsize=2971392 blks
= sectsz=512 attr=2, projid32bit=1
= crc=0
data = bsize=4096 blocks=11885568, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=5803, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 11885568 to 17687552