environment-variables-in-k8s

Environment Variables in Kubernetes

Problem

There are a number of parameters that are used by the applications. We need to define these as environment variables, so that we can use them as needed within different configs. Below is a scenario which needs to be configured on Kubernetes cluster. Please find below more details about the same.

Create a pod named envars.

Container name should be fieldref-container, use image httpd preferable latest tag, use command 'sh', '-c' and args should be

'while true; do echo -en '/n'; printenv NODE_NAME POD_NAME; printenv POD_IP POD_SERVICE_ACCOUNT; sleep 10; done;'

(Note: please take care of indentations)

Define Four environment variables as mentioned below:

a.) The first env should be named as NODE_NAME, set valueFrom fieldref and fieldPath should be spec.nodeName.

b.) The second env should be named as POD_NAME, set valueFrom fieldref and fieldPath should be metadata.name.

c.) The third env should be named as POD_IP, set valueFrom fieldref and fieldPath should be status.podIP.

d.) The fourth env should be named as POD_SERVICE_ACCOUNT, set valueFrom fieldref and fieldPath shoulbe be spec.serviceAccountName.

Set restart policy to Never.

To check the output, exec into the pod and use printenv command.

Note: The kubectl utility on jump_host has been configured to work with the kubernetes cluster.

Solution

• See: Solution