I had an issue today where it was time for a real restart. Sadly after the reboot everything was running but I was locked out. no ssh, ftp nothing at all. So using vps web consol my host ran
yum -y remove NetworkManager
and rebooted and it's all back to normal.
As stated by my host provider.
on centos 7 NetworkManager breaks the network.
I have removed it with:
yum -y remove NetworkManager
and rebooted your vps and it's all back to normal.