Hi everyone, it has been quite a while I don’t publish anything. It is due to the amount of work I have for a few months. Things are becoming more stable now and I will be back to the blog more frequently.
Olá galera, faz um tempinho que não publico nada né? Isso se deve a quantidade de trabalho que tive por alguns meses. As coisas estão ficando mais estáveis agora e vou voltar ao blog com mais frequência.
Today I just want to bring to you all quickly how to extend a LVM based filesystem.
Hoje eu só quero trazer para vocês rapidamente como estender um filesystem em LVM.
This is an Oracle Linux 6.9 virtual machine and the /u01 filesystem got full:
Esta é uma máquina virtual com Oracle Linux 6.9 onde o filesystem /u01 encheu:
[root@oracle01 ~]# cat /etc/oracle-release
Oracle Linux Server release 6.9
[root@oracle01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 12G 4.9G 6.3G 44% /
tmpfs 3.9G 641M 3.3G 17% /dev/shm
/dev/sda1 2.0G 276K 2.0G 1% /boot/efi
/dev/mapper/vg_oracle-lvu01
58G 58G 16K 100% /u01
When that happens you start seeing this error everywhere: “Error message: Linux-x86_64 Error: 28: No space left on device”
Quando isso acontece você começa a ver esse erro em todo lugar: “Error message: Linux-x86_64 Error: 28: No space left on device”
LVM architecture overview
I just added 3 new disks with 30GB size each.
Eu adicionei 3 novos discos de 30GB cada.
If you pay attention here sda and sdc are being used already in vg_oracle Volume Group:
Se você prestar atenção aqui o sda e o sdc já estão sendo usados no Volume Group vg_oracle:
[root@oracle01 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sda2 vg_oracle lvm2 a--u 30.00g 0 /dev/sdc vg_oracle lvm2 a--u 30.00g 1.99g
sdb is an ASM disk:
O sdb é um disco do ASM:
[root@oracle01 ~]# oracleasm querydisk -v -p /dev/sdb1 Device "/dev/sdb1" is marked an ASM disk with the label "DATA00"
So it remains from this list only sdd, sde and sdf:
Então restam desta lista somente sdd, sde e sdf:
[root@oracle01 ~]# ls -lh /dev/sd* brw-rw----. 1 root disk 8, 0 Jan 7 10:15 /dev/sda brw-rw----. 1 root disk 8, 1 Jan 7 10:15 /dev/sda1 brw-rw----. 1 root disk 8, 2 Feb 8 09:33 /dev/sda2 brw-rw----. 1 root disk 8, 3 Jan 7 10:15 /dev/sda3 brw-rw----. 1 root disk 8, 4 Jan 7 10:15 /dev/sda4 brw-rw----. 1 root disk 8, 16 Jan 7 10:15 /dev/sdb brw-rw----. 1 root disk 8, 17 Jan 7 10:15 /dev/sdb1 brw-rw----. 1 root disk 8, 32 Feb 8 09:33 /dev/sdc brw-rw----. 1 root disk 8, 48 Mar 15 18:03 /dev/sdd brw-rw----. 1 root disk 8, 64 Mar 15 18:06 /dev/sde brw-rw----. 1 root disk 8, 80 Mar 15 18:08 /dev/sdf
We could also check listing the block devices:
Nós podemos ainda verificar listando os block devices:
[root@oracle01 ~]# lsblk NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT sda 8:0 0 60G 0 disk |-sda1 8:1 0 2G 0 part /boot/efi |-sda2 8:2 0 30G 0 part | `-vg_oracle-lvu01 (dm-0) 251:0 0 118G 0 lvm /u01 |-sda3 8:3 0 12G 0 part / `-sda4 8:4 0 8G 0 part [SWAP] sdb 8:16 0 120G 0 disk `-sdb1 8:17 0 120G 0 part sdc 8:32 0 30G 0 disk `-vg_oracle-lvu01 (dm-0) 251:0 0 118G 0 lvm /u01 sdd 8:48 0 30G 0 disk `-vg_oracle-lvu01 (dm-0) 251:0 0 118G 0 lvm /u01 sde 8:64 0 30G 0 disk `-vg_oracle-lvu01 (dm-0) 251:0 0 118G 0 lvm /u01 sdf 8:80 0 30G 0 disk sr0 11:0 1 1024M 0 rom
Now we will use the new disks to increase our filesystem.
Agora vamos usar os novos discos para aumentar o filesystem.
First we create a Physical Volume for each one of them:
Primeiro criamos um Physical Volume para cada um deles:
[root@oracle01 ~]# pvcreate /dev/sdd Physical volume "/dev/sdd" successfully created [root@oracle01 ~]# pvcreate /dev/sde Physical volume "/dev/sde" successfully created [root@oracle01 ~]# pvcreate /dev/sdf Physical volume "/dev/sdf" successfully created
We list the physical volumes to check if they were created as expected:
Listamos os physical volumes para verificar se foram criados como esperado:
[root@oracle01 ~]# pvs PV VG Fmt Attr PSize PFree /dev/sda2 vg_oracle lvm2 a--u 30.00g 0 /dev/sdc vg_oracle lvm2 a--u 30.00g 1.99g /dev/sdd lvm2 ---- 30.00g 30.00g /dev/sde lvm2 ---- 30.00g 30.00g /dev/sdf lvm2 ---- 30.00g 30.00g
Then we add the physical volumes to our volume group vg_oracle:
Então adicionamos os physical volumes no nosso volume group vg_oracle:
[root@oracle01 ~]# vgextend vg_oracle /dev/sdd Volume group "vg_oracle" successfully extended [root@oracle01 ~]# vgextend vg_oracle /dev/sde Volume group "vg_oracle" successfully extended [root@oracle01 ~]# vgextend vg_oracle /dev/sdf Volume group "vg_oracle" successfully extended
We can confirm the volume group was extended:
Podemos confirmar que o volume group foi estendido:
[root@oracle01 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_oracle 5 1 0 wz--n- 149.98g 91.98g
Listing our Logical Volumes we see the lvu01 has 58GB in size:
Listando nossos logical volumes vemos que o lvu01 tem 58GB de tamanho:
[root@oracle01 ~]# lvs LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert lvu01 vg_oracle -wi-ao---- 58.00g
We extend it adding 60GB:
Estendemos adicionando 60GB:
[root@oracle01 ~]# lvextend -L +60G /dev/mapper/vg_oracle-lvu01 Size of logical volume vg_oracle/lvu01 changed from 58.00 GiB (14848 extents) to 118.00 GiB (30208 extents). Logical volume lvu01 successfully resized.
Ok, done? No. If we check the filesystem size it was not yet increased:
Ok, pronto? Não. Se verificarmos o tamanho do filesystem ele não foi expandido:
[root@oracle01 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda3 12G 4.9G 6.3G 44% /
tmpfs 3.9G 641M 3.3G 17% /dev/shm
/dev/sda1 2.0G 276K 2.0G 1% /boot/efi
/dev/mapper/vg_oracle-lvu01
58G 58G 16K 100% /u01
Since we are using a XFS filesystem here we need to update the /u01 filesystem with the LVM data. In order to do that for a XFS filesystem we use the xfs_growfs command:
Como estamos usando um filesystem XFS aqui precisamos fazer a atualização do filesystem /u01 com os dados do LVM. Para fazer isso para um filesystem XFS usamos o comando xfs_growfs:
[root@oracle01 ~]# xfs_growfs /u01
meta-data=/dev/mapper/vg_oracle-lvu01 isize=256 agcount=12, agsize=1310720 blks
= sectsz=4096 attr=2, projid32bit=1
= crc=0 finobt=0
data = bsize=4096 blocks=15204352, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=0
log =internal bsize=4096 blocks=2560, version=2
= sectsz=4096 sunit=1 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
data blocks changed from 15204352 to 30932992
Note: If you are using EXT3 or EXT4 you should still use the resize2fs command instead of the xfs_growfs.
Obs: Se você estiver usando EXT3 ou EXT4 você ainda deve usar o comando resize2fs ao invés do xfs_growfs.
Now we see the filesystem /u01 has more space available:
Agora vemos que o filesystem /u01 tem mais espaço disponível:
[root@oracle01 ~]# df -h /u01
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/vg_oracle-lvu01
118G 60G 59G 51% /u01
If we list the volume group vg_oracle again we will see that we still have available +30GB free, that’s because we added 3 disks of 30GB each and we only extended 60GB in our logical volume:
Se listarmos o volume group vg_oracle novamente veremos que ainda temos +30GB disponíveis, isso porque adicionamos 3 discos de 30GB cada e estendemos somente 60GB no nosso logical volume:
[root@oracle01 ~]# vgs VG #PV #LV #SN Attr VSize VFree vg_oracle 5 1 0 wz--n- 149.98g 31.98g [root@oracle01 ~]# vgdisplay vg_oracle --- Volume group --- VG Name vg_oracle System ID Format lvm2 Metadata Areas 5 Metadata Sequence No 10 VG Access read/write VG Status resizable MAX LV 0 Cur LV 1 Open LV 1 Max PV 0 Cur PV 5 Act PV 5 VG Size 149.98 GiB PE Size 4.00 MiB Total PE 38395 Alloc PE / Size 30208 / 118.00 GiB Free PE / Size 8187 / 31.98 GiB VG UUID wC9kc3-0bAa-VsLB-Rcov-cLlz-H471-H0cYy0
That’s all for today folks. In case of any doubt leave a comment.
Por hoje é só pessoal. Em caso de qualquer dúvida deixe um comentário.
Franky