Resize /dev/mapper/pve-root & rootfs

[synden]

Like the topic I would like to resize rootfs and the pve-root folders due to they don't use much space and I would like to give that
space to /dev/mapper/pve-data instead.

rootfs 28G 1.2GB(used) 25G(available) 5%(use%) /
/dem/mapper/pve-root 28G 1.2GB(used) 25G(available) 5%(use%) /

I've googled some but I don't find any good explanation how I will do this. Is rescue CD only option to resize or can I do it via command line?

Best reagards!

 

[t.lamprecht]

Online shrinking is not possible, AFAIK online resizing works only while enlarging.

The rescue CD would be an option, should work something like:

1. backup the machine
2. start it from a linux cd (systemrescuecd, grml etc.)
3. check the filesystem on /dev/mapper/pve-root (e2fsck)
4. resize the filesystem on /dev/mapper/pve-root (resize2fs)
5. reduce the logical volume /dev/mapper/pve-root (lvreduce)
6. extend the logical volume /dev/mapper/pve-data (lvextend)
7. resize the filesystem on /dev/mapper/pve-data (resize2fs)

That it has some minimal risk is self explaining.

As you're gaining "only" around 20G adding a new disk to your system would be an good option to, would also save you the hassle with resizing.