[Rdo-list] Query regarding RDO Juno-1 install on CentOS7

Hi, I was able to install 3-node RDO juno-1 (rdo-release-juno-1.noarch) over CentOS7, but at the end of install it gave me this ... Questions prefixed with Q: inline below: Additional information: * Time synchronization installation was skipped. Please note that unsynchronized time on server instances might be problem for some OpenStack components. *Q: Do i need to sue ntpd to ensure all my systems are in sync, whats the recommended way here ?* * Warning: NetworkManager is active on <IP1>, <IP2> and <IP3>. OpenStack networking currently does not work on systems that have the Network Manager service enabled. *Q: Do i need to disable NetworkManager.service on all or is it safe to ignore this? What exactly doesn't work with NetworkManager ?For my system it looks like below :[root@rhsdev1 packstack]# systemctl status NetworkManager.service NetworkManager.service - Network Manager Loaded: loaded (/usr/lib/systemd/system/NetworkManager.service; enabled) Active: active (running) since Wed 2014-12-24 23:45:56 IST; 4 days ago Main PID: 2002 (NetworkManager)[root@rhsdev1 packstack]# systemctl status network.service network.service - LSB: Bring up/down networking Loaded: loaded (/etc/rc.d/init.d/network) Active: failed (Result: exit-code) since Wed 2014-12-24 23:45:57 IST; 4 days ago* thanx, deepak