How to Fix \'no such file or directory\' zoneinfo.zip Errors in Dockerized Go Applications?

Resolving Timezone Errors in Dockerized Go Applications

When deploying a Docker container application to a Kubernetes engine, an error indicating "no such file or directory" in relation to zoneinfo.zip can arise.

Cause:

This error stems from the absence of the timezone information file (zoneinfo.zip) on the deployed container.

Solution:

To embed the timezone database into the Go application and eliminate the need for external access, consider the following:

Using Go 1.15 or Later:

• Import the time/tzdata package or build with -tags timetzdata.
• This action embeds the timezone database into the program, increasing its size by approximately 800 KB.

Caveat:

Embeding timezone data within the application limits updates to the timezone information version based on the Go version used for building.

Alternative Solution (Recommended):

To retain the ability to update timezone information independently from the Go version, consider:

• Including the zoneinfo.zip file within the Docker image.
• Adding a command to the Dockerfile to download and extract the timezone database during image creation.
• For example:

RUN set -x \
   && curl -sSL http://mirrors.gigenet.com/pub/timezone/data/latest/zoneinfo.zip \
   && unzip -p zoneinfo.zip > /usr/share/zoneinfo.zip 

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