Yes, I'm pretty sure is based on CentOS 7
Getting this in Open VZ 7 as well [root@eva02 ~]# uname -a Linux eva02 3.10.0-327.36.1.vz7.20.18 #1 SMP Tue Dec 20 13:52:43 MSK 2016 x86_64 x86_64 x86_64 GNU/Linux [root@eva02 ~]# cat /etc/redhat-release Virtuozzo Linux release 7.3