How to access environment variables inside container at runtime ?

Question

We aware of that we can define environment variables in pod/containers. i wanted to use the same environment variable inside the container at runtime.

ex: i am running a webapplication using python , inside that how to i get the values of environment values?

Possible duplicate of [How do I access environment variables from Python?](https://stackoverflow.com/questions/4906977/how-do-i-access-environment-variables-from-python) — OneCricketeer, Oct 15 '18 at 05:25
i have created docker image and installed it in kubernetes. at runtime of my application i am unable to get env variable — Nantha kumar, Oct 17 '18 at 16:07
Well, perhaps you should show your code and service definition. Otherwise, linked question and given answers all work fine inside containers, or not — OneCricketeer, Oct 17 '18 at 22:16
https://github.com/kubernetes/kubernetes/issues/69934 can you please look into the issue. — Nantha kumar, Oct 18 '18 at 05:48

Veerendra · Answer 1 · 2019-06-17T07:21:29.960

3

First go inside the pod or exec the bash(kubeclt exec -it <pod_name> bash) and run printenv to get some idea what are the environmental variables available.

From Python

import os
os.environ['MYCUSTOMVAR']

edited Jun 17 '19 at 07:21

answered Oct 15 '18 at 09:35

Veerendra

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printenv is working fine. but if i want to access from the pod it is not showing the env variables. it shows the env variables that are defined in circus. i want to access env variables used in deployment.yaml files – Nantha kumar Oct 16 '18 at 14:18
1

@Nanthakumar Not sure what you are trying to achieve. I believe your python script is inside of pod?? You can access all environmental(Including environmental variables that you defined in yaml) – Veerendra Oct 17 '18 at 07:41

score 0 · Answer 2 · answered Oct 15 '18 at 06:12

0

Accessing environment variables is pretty easy with the os module.

import os
os.environ.get("ENV_VAR_NAME")

answered Oct 15 '18 at 06:12

kungphu

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How to access environment variables inside container at runtime ?

2 Answers2