Unable to update kubernetes container /etc/hosts file using hostAliases - kubernetes

Question

I am trying to update kubernetes container /etc/hosts file through hostAliases with Deployment kind, however this is not updating /etc/hosts but deployment is successful.
Unable to make out what is stopping to updating hostAliases. And also, please suggest any alternative way to update /etc/hosts entries of a kubernetes container
Here is the deployment.yml file I am using, appreciate your help
apiVersion: extensions/v1beta1
kind: Deployment
metadata:
name: test-services
namespace: dev
labels:
app: test-services
spec:
replicas: 1
revisionHistoryLimit: 0
selector:
matchLabels:
app: test-services
template:
metadata:
labels:
app: test-services
spec:
containers:
- name: test-services
image: test-services:latest
imagePullPolicy: Always
ports:
- containerPort: 8080
readinessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 30
periodSeconds: 5
livenessProbe:
httpGet:
path: /health
port: 8080
initialDelaySeconds: 60
periodSeconds: 5
env:
- name: JAVA_OPTS
value: "-Dspring.profiles.active=dev"
- name: DB_USER
valueFrom:
secretKeyRef:
name: db-credentials
key: username
- name: DB_PASS
valueFrom:
secretKeyRef:
name: db-credentials
key: password
restartPolicy: Always
hostAliases:
- ip: "127.0.0.1"
hostnames:
- "foo.local"
- "bar.local"
- ip: "10.1.2.3"
hostnames:
- "foo.remote"
- "bar.remote"
imagePullSecrets:
- name: registry-secret