Connect Flask python script to Redis in K8s cluster - flask

Question

I have k8s cluster in ec2, I have implemented the guestbook k8s (php and redis) example and it works well.
https://kubernetes.io/docs/tutorials/stateless-application/guestbook/
I have a flask app, it's a docker image. This app has main.py script file and inside it, I have tried connecting Redis with the following help
Connecting a flask container to a redis container over kubernetes
this is my redis service running in EC2
redis-follower ClusterIP 10.102.44.232 <none> 6379/TCP 16d
redis-leader ClusterIP 10.108.164.219 <none> 6379/TCP 16d
this is my python script
from flask import Flask
from flask import render_template
import os
from flask import Flask
from redis import Redis, RedisError
import socket
app = Flask(__name__)
#app.route("/")
def sample_run_report():
redis_conn = Redis(host='redis-leader.default.svc.cluster.local', port=6379, db=0)
redis_conn.set("key", "foo")
val = redis_conn.get("key")
return val
if __name__ == "__main__":
app.run(host='0.0.0.0')
I dont get the value, I think my connection to Redis is not successful.
For deployments I have used guestbook php redis yaml.
application/guestbook/redis-leader-deployment.yaml
# SOURCE: https://cloud.google.com/kubernetes-engine/docs/tutorials/guestbook
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis-leader
labels:
app: redis
role: leader
tier: backend
spec:
replicas: 1
selector:
matchLabels:
app: redis
template:
metadata:
labels:
app: redis
role: leader
tier: backend
spec:
containers:
- name: leader
image: "docker.io/redis:6.0.5"
resources:
requests:
cpu: 100m
memory: 100Mi
ports:
- containerPort: 6379
This is the service and deployment YAML file I use for flask app deployment in ec2.
apiVersion: v1
kind: Service
metadata:
name: redis-flask-python1-service
spec:
selector:
app: redis-flask-python1
ports:
- protocol: "TCP"
port: 6000
targetPort: 5000
type: LoadBalancer
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: redis-flask-python1
spec:
selector:
matchLabels:
app: redis-flask-python1
replicas: 1
template:
metadata:
labels:
app: redis-flask-python1
spec:
containers:
- name: redis-flask-python1
image: http://docker.io/dechenw/redis-flask-python1
imagePullPolicy: IfNotPresent
ports:
- containerPort: 5000
imagePullSecrets:
- name: regcred
How can I resolve this issue?