using overlay2 on CentOS 7.4

How do I install and enable the overlay2 storage driver on CentOS 7? I have done many google searches on this and I see that version 7.4 is required. So I typed the following commands to confirm that the intended server is running version 7.4 of CentOS: [sudoUser@localhost ~]$ cat /etc/centos-release CentOS Linux release 7.4.1708 (Core) [sudoUser@localhost ~]$ rpm --query centos-release centos-release-7-4.1708.el7.centos.x86_64 [sudoUser@localhost ~]$ But there does not seem to be any yum install overlay2 or yum install overlayfs. >**So what specific steps are required in order to install and enable overlay2 on CentOS 7.4?**