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lvm [2013/07/03 19:52] k2patel [Steps to create LVM from drive] |
lvm [2020/08/10 02:35] |
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- | ====== LVM ====== | ||
- | |||
- | LVM you can increase / decrease size without any issue.\\ | ||
- | But it is important you do it in proper steps. | ||
- | |||
- | ==== Steps to create LVM from drive ==== | ||
- | <code bash> | ||
- | pvcreate /dev/xvdf1 | ||
- | pvdisplay /dev/xvdf1 | ||
- | vgcreate -s 16M vg0 /dev/xvdf1 | ||
- | vgdisplay /dev/xvdf | ||
- | vgdisplay vg0 | ||
- | lvcreate -n lv-vol001 vg0 | ||
- | lvcreate --help | ||
- | lvcreate -A n -L 24.5G -n lv-vol001 vg0 | ||
- | mkfs.ext3 /dev/vg0/lv-vol001 | ||
- | </code> | ||
- | |||
- | ==== Add drive to LVM ==== | ||
- | <code bash> | ||
- | fdisk /dev/xvdk | ||
- | mkfs.ext3 /dev/xvdk1 | ||
- | pvcreate /dev/xvdk1 | ||
- | vgextend vg0 /dev/xvdk1 | ||
- | lvextend -L 300G /dev/vg0/lv-vol001 | ||
- | lvextend -L+99.91G /dev/vg0/lv-vol001 | ||
- | resize2fs /dev/vg0/lv-vol001 | ||
- | </code> | ||
- | |||
- | ==== Reducing Size ==== | ||
- | |||
- | <code bash> | ||
- | umount /home | ||
- | e2fsck -y /dev/mapper/VolGroup00-LogVol00 | ||
- | resize2fs -f /dev/mapper/VolGroup00-LogVol00 1536M | ||
- | lvreduce -L-512M /dev/mapper/VolGroup00-LogVol00 | ||
- | mount /home | ||
- | </code> | ||
- | |||
- | |||
- | ==== Increasing Size ==== | ||
- | <code bash> | ||
- | umount /opt/ | ||
- | e2fsck -y /dev/mapper/VolGroup00-LogVol02 | ||
- | lvextend -L+512M /dev/mapper/VolGroup00-LogVol02 | ||
- | resize2fs /dev/mapper/VolGroup00-LogVol02 | ||
- | mount /opt | ||
- | </code> | ||
- | |||
- | ==== Worked Example on Live System ==== | ||
- | |||
- | <code bash | history> | ||
- | fdisk -l | ||
- | fdisk /dev/sda ## Comment "Specidy Type 8e by option t" | ||
- | mkfs.ext3 /dev/sda1 | ||
- | vgextend VolGroup00 /dev/sda1 | ||
- | lvdisplay | ||
- | vgdisplay | ||
- | lvextend -l+1599 /dev/VolGroup00/LogVol00 | ||
- | df -kh | ||
- | vgdisplay | ||
- | lvdisplay | ||
- | resize2fs /dev/VolGroup00/LogVol00 | ||
- | df -kh | ||
- | </code> | ||