VM files

OpenVZ

Containers:
Config:

/etc/vz/vz.conf
/etc/vz/dists/distro-name.conf
/etc/vz/conf/

OpenVZ main log:

/var/log/vzctl.log

Separate log for each VM:

/vz/root/<vmID>/var/log/massages  #in case of linux guest

VM config:

KVM images:

/dev/vg1/

Main KVM log:

/var/log/libvirt/libvirtd.log

Separate log for each VM:

/var/log/libvirt/qemu/

Config:

/etc/libvirt/libvirtd.conf
/etc/libvirt/qemu.conf

Separate config for each VM:

/etc/libvirt/qemu/<vmID>.xml