Implement NTP and NTPDate Cron job

[Isabello]

In order to maintain time against the Host OS which can be untrustworthy, we should implement ntp and configure ntpdate on a cronjob to resolve potential time drift issues.

[Removed-5an]

I have reviewed this suggestion and the idea has its merits but is impractical.

NTP needs to run as root and the container needs to run in privileged mode for it to be able to modify system time. Privileged mode exposes you to all sorts of problems and makes it lot more possible to compromise the host if the container was ever compromised.

A more viable solution is to run NTP on the docker host and mount the host time in the container:

-v /etc/localtime:/etc/localtime:ro

[Isabello]

Ok no problem.