Resizing/Extending Logical Volumes (LVM) in Proxmox

#LVM #LinuxVolumeManagement #Proxmox #Partitioning

Full steps can be found at https://i12bretro.github.io/tutorials/0644.html

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What is LVM?
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LVM stands for Logical Volume Management. It is a system of managing logical volumes, or filesystems, that is much more advanced and flexible than the traditional method of partitioning a disk into one or more segments and formatting that partition with a filesystem. – https://wiki.ubuntu.com/Lvm

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WARNING
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Below are the steps I took when I replaced my Proxmox 32GB microSD with a 64GB and cloned the installation from the old card to the new one. Do not attempt these steps without first having a backup as there is a high risk of data loss if the partition changes are unsuccessful

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Extending a LVM Volume
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   01. Log into the device using LVM, in this example I’ll be extending the pve-root and data volumes in Proxmox
   02. Run the following commands in terminal
         # login as root if needed (not needed for proxmox)
         sudo su
         # list disks and partitions
         fdisk -l
         # list volume groups
         vgdisplay
         # list logical volumes
         lvdisplay
         # edit partitions with fdisk, change device id as needed
         fdisk /dev/sda
         # print the partition table
         p
         # delete a partition
         d
         # enter the lvm partition number
         3
         # create a new partition
         n
         # enter the new partition number, same as the number deleted
         3
         # press enter to accept the default first sector
         # press enter to accept the default last sector
         # when prompted about removing the LVM signature, enter N
         n
         # set the partition type
         t
         # enter the partition number
         3
         # set the type to Linux LVM
         30
         # write the changes
         w
         # list disks and partitions, noting the size increase
         fdisk -l
         # extend the existing physical volume
         pvresize /dev/sda3
         # extend the pve-root logical volume to 100% available free space
         lvresize -L +8GB /dev/pve/root
         # extend the underlying file system
         resize2fs /dev/mapper/pve-root
         # list logical volumes, noting root is now 8GB larger
         lvdisplay
         # extend the data to 100% available free space
         lvextend -l +100%FREE pve/data
         # list logical volumes, noting data is now over 35GB
         lvdisplay

Further Reading: https://wiki.ubuntu.com/Lvm