informatica:linux:discos:lvm
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informatica:linux:discos:lvm [2014/01/09 07:10] – [Añadir disco físico] javi | informatica:linux:discos:lvm [2023/10/05 00:27] (current) – jose | ||
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Tenemos un disco duro con dos particiones: | Tenemos un disco duro con dos particiones: | ||
- | / | + | | / |
- | / | + | | / |
Hemos trasteado el LVM y no arranca. Para montar LVM desde una live-cd: | Hemos trasteado el LVM y no arranca. Para montar LVM desde una live-cd: | ||
Line 297: | Line 297: | ||
Tenemos 80 Gb en home y queremos pasar 20 a una unidad de apoyo | Tenemos 80 Gb en home y queremos pasar 20 a una unidad de apoyo | ||
- | Reducimos tamaño del primer LV: | + | 1. Siempre es mejor desmontar |
- | lvreduce -L60G / | + | |
- | Creamos el LV de apoyo: | + | |
- | lvcreate vol64 --name apoyo --size=20G | + | |
- | Formatemos el LV: | + | |
- | mkfs.ext3 / | + | |
- | Ya está listo para montar | + | umount / |
+ | |||
+ | 2. Achichar espacio en disco, en este caso el nuevo tamanyo sera 60G | ||
+ | |||
+ | resize2fs / | ||
+ | |||
+ | 3. Achicar Logical Volume: | ||
+ | |||
+ | lvreduce -L60G / | ||
+ | |||
+ | 4. Crear el nuevo LV con todo el espacio libre: | ||
+ | |||
+ | lvcreate -n lv_iso -l 100%FREE vg_manager2 | ||
+ | |||
+ | 5. Formatear el nuevo LV | ||
+ | |||
+ | mkfs.ext4 / | ||
+ | |||
+ | Ahora ya se pueden | ||
====== Renombrar volumenes ====== | ====== Renombrar volumenes ====== | ||
Line 552: | Line 565: | ||
| | ||
Aparece el nuevo volumen, con el valor '# open' a ' | Aparece el nuevo volumen, con el valor '# open' a ' | ||
+ | |||
+ | ====== Crear VG ====== | ||
+ | |||
+ | ****Antecedentes**** | ||
+ | |||
+ | La secuencia es: | ||
+ | |||
+ | 1º crear un PV (Volumen Físico) | ||
+ | |||
+ | 2º crear 1 VG (Grupo de Volúmenes) para ese PV | ||
+ | |||
+ | 3º crear 1/+ LV (Volúmenes Lógicos) para ese VG | ||
+ | |||
+ | 5. Crear un PV (Volumen Físico) en una partición: | ||
+ | |||
+ | pvcreate /dev/sda7 | ||
+ | | ||
+ | 6. Crear un VG (Grupo de Volúmenes) | ||
+ | |||
+ | vgcreate vg /dev/sda7 | ||
+ | | ||
+ | 7. Activarlo | ||
+ | |||
+ | vgchange -a y vg | ||
+ | | ||
+ | |||
+ | ======= Achicar LV swap ======= | ||
+ | |||
+ | 1. Desactivar todas la swap (se podría especificar la que usa el LV): | ||
+ | |||
+ | swapoff -a | ||
+ | |||
+ | 2. Reducir 1 GB el tamaño del LV que usamos para swap | ||
+ | |||
+ | lvreduce / | ||
+ | |||
+ | < | ||
+ | WARNING: Reducing active logical volume to 4.00 GiB. | ||
+ | THIS MAY DESTROY YOUR DATA (filesystem etc.) | ||
+ | Do you really want to reduce vg/swap? [y/n] | ||
+ | </ | ||
+ | |||
+ | Pulsar ' | ||
+ | |||
+ | < | ||
+ | Size of logical volume vg/swap changed from 5.00 GiB (1280 extents) to 4.00 GiB (1024 extents). | ||
+ | Logical volume vg/swap successfully resized. | ||
+ | </ | ||
+ | |||
+ | 3. Formatear como swap el dispositivo del LV | ||
+ | |||
+ | mkswap / | ||
+ | |||
+ | < | ||
+ | Setting up swapspace version 1, size = 4 GiB (4294963200 bytes) | ||
+ | no label, UUID=1c3bd974-d6c4-46e4-9f64-bc2445f9e200 | ||
+ | </ | ||
+ | |||
+ | 4. Montar swap (previsamente ya tiene su entrada en '/ | ||
+ | |||
+ | swapon -va | ||
+ | |||
+ | < | ||
+ | swapon: / | ||
+ | swapon: / | ||
+ | swapon / | ||
+ | </ | ||
+ | |||
+ | 5. Comprobar | ||
+ | |||
+ | cat /proc/swaps | ||
+ | |||
+ | < | ||
+ | Filename Type Size Used Priority | ||
+ | / | ||
+ | </ | ||
+ | |||
+ | free -h | ||
+ | |||
+ | < | ||
+ | total used free shared | ||
+ | Mem: | ||
+ | Swap: | ||
+ | </ | ||
+ | |||
+ | |||
+ | ====== Debian 12 ====== | ||
+ | Tenemos que desmontar /home | ||
+ | |||
+ | Miramos las particiones: | ||
+ | < | ||
+ | root@debian: | ||
+ | Filesystem | ||
+ | udev | ||
+ | tmpfs 783M 688K 783M 1% /run | ||
+ | / | ||
+ | tmpfs 3.9G | ||
+ | tmpfs 5.0M | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | tmpfs 783M | ||
+ | tmpfs 783M | ||
+ | </ | ||
+ | |||
+ | Miramos LVM | ||
+ | < | ||
+ | root@debian: | ||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name root | ||
+ | VG Name debian-vg | ||
+ | LV UUID sM1VB5-QkRX-BXM1-No2F-S23M-YwQU-Cg5351 | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 18:21:09 -0400 | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size 22.25 GiB | ||
+ | Current LE 5697 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name var | ||
+ | VG Name debian-vg | ||
+ | LV UUID u5Hxq6-k9eJ-25WS-AK02-afVC-o76u-vlYnyd | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 18:21:09 -0400 | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size <7.73 GiB | ||
+ | Current LE 1978 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name swap_1 | ||
+ | VG Name debian-vg | ||
+ | LV UUID r88cII-vYx4-aAmF-85yJ-vjq6-8jkR-vS5JtK | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 18:21:09 -0400 | ||
+ | LV Status | ||
+ | # open 2 | ||
+ | LV Size 976.00 MiB | ||
+ | Current LE 244 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name tmp | ||
+ | VG Name debian-vg | ||
+ | LV UUID mZHGHj-VUxN-QQhR-q8Lb-DAvW-E9sn-8ZuZ15 | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 18:21:09 -0400 | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size 1.37 GiB | ||
+ | Current LE 351 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | |||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name home | ||
+ | VG Name debian-vg | ||
+ | LV UUID 69Y7rL-hzIr-21jn-KV3R-8qP5-XLdg-arYSL7 | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 18:21:10 -0400 | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size <86.43 GiB | ||
+ | Current LE 22126 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | </ | ||
+ | Quitamos 40Gbs a /home: | ||
+ | lvreduce -L -40G / | ||
+ | < | ||
+ | WARNING: Reducing active and open logical volume to <46.43 GiB. | ||
+ | THIS MAY DESTROY YOUR DATA (filesystem etc.) | ||
+ | Do you really want to reduce debian-vg/ | ||
+ | Size of logical volume debian-vg/ | ||
+ | Logical volume debian-vg/ | ||
+ | </ | ||
+ | Vemos que hay 40Gb libres: | ||
+ | < | ||
+ | root@debian: | ||
+ | --- Volume group --- | ||
+ | VG Name | ||
+ | System ID | ||
+ | Format | ||
+ | Metadata Areas 1 | ||
+ | Metadata Sequence No 7 | ||
+ | VG Access | ||
+ | VG Status | ||
+ | MAX LV 0 | ||
+ | Cur LV 5 | ||
+ | Open LV 5 | ||
+ | Max PV 0 | ||
+ | Cur PV 1 | ||
+ | Act PV 1 | ||
+ | VG Size | ||
+ | PE Size 4.00 MiB | ||
+ | Total PE 30403 | ||
+ | Alloc PE / Size 20156 / 78.73 GiB | ||
+ | Free PE / Size 10247 / <40.03 GiB | ||
+ | VG UUID | ||
+ | </ | ||
+ | |||
+ | Se las añadimos a /var | ||
+ | lvextend -L +40G / | ||
+ | < | ||
+ | Size of logical volume debian-vg/ | ||
+ | Logical volume debian-vg/ | ||
+ | </ | ||
+ | Vemos que todavía no lo ha añadido: | ||
+ | < | ||
+ | df -h | ||
+ | Filesystem | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | </ | ||
+ | Pero con lvdisplay si aparece: | ||
+ | < | ||
+ | --- Logical volume --- | ||
+ | LV Path / | ||
+ | LV Name var | ||
+ | VG Name debian-vg | ||
+ | LV UUID jud91P-5LXr-t0KI-5KSM-nim3-Xhvk-oSwkw5 | ||
+ | LV Write Access | ||
+ | LV Creation host, time debian, 2023-10-04 19:47:42 -0400 | ||
+ | LV Status | ||
+ | # open 1 | ||
+ | LV Size <47.73 GiB | ||
+ | Current LE 12218 | ||
+ | Segments | ||
+ | Allocation | ||
+ | Read ahead sectors | ||
+ | - currently set to 256 | ||
+ | Block device | ||
+ | </ | ||
+ | Hay que extender el FS: | ||
+ | resize2fs / | ||
+ | |||
+ | resize2fs 1.47.0 (5-Feb-2023) | ||
+ | Filesystem at / | ||
+ | old_desc_blocks = 1, new_desc_blocks = 6 | ||
+ | The filesystem on / | ||
+ | Ahora si que aparece: | ||
+ | < | ||
+ | root@debian: | ||
+ | Filesystem | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | / | ||
+ | </ |
informatica/linux/discos/lvm.1389251431.txt.gz · Last modified: 2015/04/13 20:19 (external edit)