Search code examples
kubernetestimezonegoogle-kubernetes-engine

Kubernetes cluster default timezone?

I had a question about the timezone used by my Kubernetes Cluster. I know I can adjust the timezone of the pods(https://evalle.xyz/posts/kubernetes-tz/).

However, I want to make sure my Cluster always uses UTC in the time zone. Is this a default option or can it change over time?

Solution

  • Have a look at the documentation Using Container-Optimized OS:

    Container-Optimized OS is the default node OS Image in Kubernetes Engine and other Kubernetes deployments on Google Cloud Platform.

    then move to the Changing the time zone for Container-Optimized OS:

    The default time zone of Container-Optimized OS is UTC0.

    and

    Note that /etc is stateless, so the timezone will be reset to the default (UTC0) every reboot.

    So, if you don't change Image type for your nodes from default Container-Optimized OS to Ubuntu you have nothing to do with time zone settings.

    In addition, I've checked on my cluster:

    $ date
Tue Feb  4 09:15:51 UTC 2020
$ ls -l /etc/ | grep localtime
lrwxrwxrwx 1 root root    25 Jan 29 08:37 localtime -> ../usr/share/zoneinfo/UTC