Hello,
[root@host2 ~]# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
sr0 11:0 1 1024M 0 rom
sda 8:0 0 38.2G 0 disk
├─sda1 8:1 0 500M 0 part /boot
└─sda2 8:2 0 37.7G 0 part
├─vg_host2-lv_root (dm-0) 253:0 0 31G 0 lvm /
└─vg_host2-lv_swap (dm-1) 253:1 0 6.7G 0 lvm [SWAP]
ploop38874 182:621984 0 9.8G 0 disk
└─ploop38874p1 182:621985 0 9.8G 0 part /vz/root/1810
.
My aim is to SAFELY shrink my swap partition (lvm vg_host2-lv_swap) so its size is 4GB and assign freed space to my root partition (lvm vg_host2-lv_root (dm-0)). I am on CentOS 6.10 64bit and i am wondering if i can do it on a running system without need to go into recovery - maybe i can go this way Change swap file size Fedora 23 - Super User (without reboot), maybe i can unmounting swap lvm on live system, but not lvresize (grow) root partition? How can i automatically grow root lvm partition during next boot (like editing boot parameters in grub)?