Kubernetes using service cluster IP and port as environment variables - kubernetes

Question

I have a backend service on cluster IP 10.101.71.17 and port 26379. I have a frontend deployment where I intend to pass this service IP as an environment variable.
frontend-deployment.yaml
---
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: frontend
namespace: my-namespace
spec:
replicas: 2
template:
metadata:
labels:
name: frontend
spec:
containers:
- name: frontend
image: localhost:5000/frontend
command: [ "/usr/local/bin/node"]
args: [ "./index.js" ]
imagePullPolicy: IfNotPresent
env:
- name: NODE_ENV
value: production
- name: API_URL
value: BACKEND_HTTP_SERVICE_HOST // Here
- name: BASIC_AUTH
value: "true"
- name: SECURE
value: "true"
- name: PORT
value: "443"
ports:
- containerPort: 443
- containerPort: 80
resources:
requests:
cpu: 100m
memory: 100Mi
ports:
- containerPort: 8079
nodeSelector:
beta.kubernetes.io/os: linux
---
I can get all the environment variables inside the pod but I am not sure what's the proper way of assigning it to the environment variable value.

Answer 1

I assume in your front end application your referring your back-end service in API_URL environment variable.
If this is the case just replace BACKEND_HTTP_SERVICE_HOST with 10.101.71.17:26379
env:
- name: NODE_ENV
value: production
- name: API_URL
value: 10.101.71.17:26379
- name: BASIC_AUTH
value: "true"
- name: SECURE
value: "true"
- name: PORT
value: "443"
your should consider using the DNS name for services.