How to utilize a single LVM Volume / root LVM partition.
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 111.8G 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 256M 0 part
└─sda3 8:3 0 111.6G 0 part
├─pve-swap 253:0 0 7G 0 lvm [SWAP]
├─pve-root 253:1 0 27.8G 0 lvm /
├─pve-data_tmeta 253:2 0 1G 0 lvm
│ └─pve-data 253:4 0 60.9G 0 lvm
└─pve-data_tdata 253:3 0 60.9G 0 lvm
└─pve-data 253:4 0 60.9G 0 lvm
1. Remove /dev/pve/data
lvremove /dev/pve/data
2. Resize root partition
lvresize -l +100%FREE /dev/pve/root
3. Completing
resize2fs /dev/mapper/pve-root
4. Verification
lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sda 8:0 0 111.8G 0 disk
├─sda1 8:1 0 1M 0 part
├─sda2 8:2 0 256M 0 part
└─sda3 8:3 0 111.6G 0 part
├─pve-swap 253:0 0 7G 0 lvm [SWAP]
└─pve-root 253:1 0 104.5G 0 lvm /