Dunno how your new hosting environment handles OS (centos 7) updates.
You might want to sign up:
https://lists.centos.org/mailman/listinfo/centos-announce
You are administering the entire server ... not just apache/mysql and the apps,
but CentOS 7 as well.
Within the last 2 weeks ... critical systemd update ... yesterday a kernel update.
No internet server is install it once and forget it.
'SoS', Ken