I have created a Docker container using the Ubuntu 16.04 image.
docker run -it -d --name containername -v /var/www/public --privileged ubuntu
after creating the container, I checked the date inside the container:
$ date
Tue Oct 25 08:10:34 UTC 2016
But, I need it to use the Asia/Kolkata timezone. So I tried changing the /etc/timezone
file, then docker stop
and docker start
the container, but it doesn't work. It still shows the same time.
How can I change the time zone in the Docker container after creating it?
Updating /etc/timezone
is the usual way, but there's a bug in Xenial which means that doesn't work.
Instead you need to create a link from the desired timezone to etc/localtime
:
FROM ubuntu:xenial
RUN ln -fs /usr/share/zoneinfo/US/Pacific-New /etc/localtime && dpkg-reconfigure -f noninteractive tzdata
In ubuntu 16.04 i was missing tzdata so i had to install it. Working solution was
ENV TZ 'Europe/Tallinn'
RUN echo $TZ > /etc/timezone && \
apt-get update && apt-get install -y tzdata && \
rm /etc/localtime && \
ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && \
dpkg-reconfigure -f noninteractive tzdata && \
apt-get clean
Try:
echo "Asia/Kolkata" > /etc/timezone
rm -f /etc/localtime
dpkg-reconfigure -f noninteractive tzdata
You have to do rm /etc/localtime
because of the Ubuntu bug .
As said here , the secret is that dpkg-reconfigure tzdata
simply creates /etc/localtime
as a copy, hardlink or symlink (a symlink is preferred) to a file in /usr/share/zoneinfo
. So it is possible to do this entirely from your Dockerfile. Consider:
ENV TZ=America/Los_Angeles
RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
And as a bonus, TZ will be set correctly in the container as well.
This is also distribution-agnostic, so it works with pretty much anything Linux.
My issue has been solved with this very simple solution ( https://serverfault.com/a/826222 ) : Add timezone in environment variable.
The command is docker run -e TZ=Europe/Amsterdam ...
Or, using docker-compose, like I do :
version: '3'
services:
web:
build: ./app
ports:
- ...
volumes:
- ...
environment:
- TZ=Europe/Paris
In my case, no more tzdata needed, or volume share with /etc/timezone & /etc/localtime.
Hope it helps !
If you use docker-compose, just add one line to your docker-compose.yml
file.
version: '3'
services:
ubuntu-local:
image: ubuntu:16.04
restart: on-failure
command: python3 run_my_code.py
working_dir: /code
volumes:
- ./code:/code
- /etc/localtime:/etc/localtime:ro # <--add this line to set timezone
environment:
- PYTHONUNBUFFERED=1
SOLVED:
FROM ubuntu:16.04
RUN apt-get update && \
apt-get install -y software-properties-common apt-utils locales tzdata
RUN echo "tzdata tzdata/Areas select Europe" > timezone.txt
RUN echo "tzdata tzdata/Zones/Europe select Rome" >> timezone.txt
RUN debconf-set-selections timezone.txt
RUN rm /etc/timezone
RUN rm /etc/localtime
RUN dpkg-reconfigure -f noninteractive tzdata
I am also experiencing this issue for a Ubuntu 18.04 docker container. Since tzdata
package is not installed. There is no /usr/share/zoneinfo
dir inside the docker. We need to first install tzdata
and use dpkg-reconfigure
to set the timezone. The following docker command works for me:
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y --no-install-recommends tzdata \
&& rm -rf /var/lib/apt/lists/*
RUN ln -fs /usr/share/zoneinfo/Asia/Shanghai /etc/localtime \
&& dpkg-reconfigure --frontend noninteractive tzdata
Simply map the volume while running docker container
-v /etc/timezone:/etc/timezone:ro
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