Shulou(Shulou.com)06/03 Report--

Today's Xiaobian shares with you the problem of how to synchronize docker container time. Sometimes after the docker container is created, you may find that the container time is inconsistent with the host time, which requires synchronizing their times.

For example, the host uses CST time zone, CST refers to (China Shanghai Time); the container uses UTC time zone, UTC refers to (Coordinated Universal Time). There are several ways to unify the two time zones:

1) localtime of shared host

Specify startup parameters when creating the container, mount the localtime file into the container, and ensure that the time zone used by the two is the same.

# docker run -ti -d --name my-nginx -v /etc/localtime:/etc/localtime:ro docker.io/nginx /bin/bash

2)localtime of replication host

[root@slave-1 ~]# docker cp /etc/localtime 87986863838b:/etc/

Then log in to the container, check the time, and find that it has synchronized with the host time.

[root@slave-1 ~]# docker exec -ti 87986863838b /bin/bashroot@87986863838b:/# dateFri May 12 11:26:19 CST 2019

3) When creating dockerfile file, customize the time format and time zone of the mirror. Add the following to the dockerfile file:

...... FROM tomcatENV CATALINA_HOME /usr/local/tomcat.......# RUN /bin/cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime && echo 'Asia/Shanghai' >/etc/timezone...

After saving, you can use docker build command to generate an image.

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