No space left on device, how to add space on the disk?

[sv_stas_sv]

root@Proxmox-VE ~ # df -h
Filesystem Size Used Avail Use% Mounted on
udev 10M 0 10M 0% /dev
tmpfs 9.5G 8.8M 9.5G 1% /run
/dev/dm-0 50G 46G 738M 99% /
tmpfs 24G 40M 24G 1% /dev/shm
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 24G 0 24G 0% /sys/fs/cgroup
/dev/sda1 488M 49M 414M 11% /boot
/dev/fuse 30M 16K 30M 1% /etc/pve
tmpfs 4.8G 0 4.8G 0% /run/user/0

 

[TheFunk]

I used these instructions to add space to my local lvm. Basically, check your disk, there should be a local volume and a local lvm volume. I increased my local lvm volume by installing a second disk, creating a lvm partition on it with fdisk, then used the commands listed in the tutorial to add that newly available space to my "local lvm" volume.

In your case, I think you'd want to extend pve-root instead of pve-data, since your root partition is the one that is full. This will appear under "local" in your pve gui.

https://pve.proxmox.com/wiki/Extending_Local_Container_Storage