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lvm: added guide to extend volumes

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tiyn 2021-06-19 17:46:00 +00:00
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@ -12,3 +12,36 @@ partition table and will display the error `Device /dev/sdb excluded by a filter
This can be solved by removing the old partition table with `wipefs -a /dev/sdb`. This can be solved by removing the old partition table with `wipefs -a /dev/sdb`.
And finally create the volume group `vgcreate vmdata /dev/sdb`. And finally create the volume group `vgcreate vmdata /dev/sdb`.
Then follow the guide in proxmox on how to connect a `vg` to proxmox. Then follow the guide in proxmox on how to connect a `vg` to proxmox.
## Add Drive to existing volume group
First format the disk so that it has one partition (we will assume its called
`/dev/sdc1`).
To add the partition to a group run:
```shell
pvcreate /dev/sdc1
vgextend <name of your volume group> /dev/sdc1
```
## Increase size of a logical volume
To increase the size of the logical volume you need to have free space in the
according volume group. You can check that by running: `vgdisplay`.
Then run:
```shell
lvextend -L +<size (e.g. 40G)> /dev/<volume groupt>/<logical volume>
```
If you want to allocate all the free space existing in a volume group run:
```shell
lvextend -l +100%FREE /dev/<volume group>/<logical volume>
```
Now you need to extend the filesystem with:
```shell
resize2fs /dev/<volume group>/<logical volume>
```