Re: Lucky!!
1/ lvextend , resize2fs
2/ vg is full
2a/ physical server: replace first raid1 disk with a bigger one. Wait for sync. Replace 2nd drive. Create new array. Pvcreate vgextend go To 1/
2b/ virtual server: virsh attach. . Pvcreate.vgextend.go To 1/. Or shutdown ,take snapshot. Create bigger volume. Swap disk in vm. Boot. Fdisk. Pvresize. Go To 1/
3/ fix the crap and/or provision more storage.
4/ by the way: check backups are still working