Will docker container auto sync time with the host machine?

Question

Giving I already changed the timezone of docker container correctly. Do I need to install a NTP server inside the docker container to periodically sync the time or the conta

Answer 1

If you prefer the TZ solution then you may be surprised to see UTC time displayed despite your request for your own timezone (it's currently 11:09 CDT):

$ docker run --rm -it -e "TZ=America/Chicago" ubuntu date
Mon Oct 26 16:09:04 America 2020

Experimentally, it seems you need the POSIX TZ format:

$ docker run --rm -it -e "TZ=CST6CDT" ubuntu date
Mon Oct 26 11:09:17 CDT 2020