Nginx 400 Bad Request in Digital Ocean Kubernetes environment - kubernetes

Question

The domain configured is ticket.devaibhav.live
ping ticket.devaibhav.live is pointing to the correct IP address of the load balancer provisioned by Digital Ocean. I haven't configured SSL on the cluster yet, but if I try to access my website http://ticket.devaibhav.live gives an 400 bad request. I am new to kubernetes and networking inside a cluster.
According to my understanding, when browser sends request to http://ticket.devaibhav.live the request is sent to the Digital Ocean Load balancer and then the ingress service (Ingress-nginx by kubernetes in my case) routes the traffic based on the rules I have defined.
ingress-nginx service
apiVersion: v1
kind: Service
metadata:
annotations:
service.beta.kubernetes.io/do-loadbalancer-enable-proxy-protocol: 'true'
service.beta.kubernetes.io/do-loadbalancer-hostname: 'ticket.devaibhav.live'
labels:
helm.sh/chart: ingress-nginx-2.0.3
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/version: 0.32.0
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/component: controller
name: ingress-nginx-controller
namespace: ingress-nginx
spec:
type: LoadBalancer
externalTrafficPolicy: Local
ports:
- name: http
port: 80
protocol: TCP
targetPort: http
- name: https
port: 443
protocol: TCP
targetPort: https
selector:
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/instance: ingress-nginx
app.kubernetes.io/component: controller
ingress resource rules
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: ingress-service
annotations:
kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/use-regex: 'true'
spec:
rules:
- host: ticket.devaibhav.live
http:
paths:
- path: /api/users/?(.*)
pathType: Prefix
backend:
service:
name: auth-srv
port:
number: 3000
- path: /api/tickets/?(.*)
pathType: Prefix
backend:
service:
name: tickets-srv
port:
number: 3000
- path: /api/orders/?(.*)
pathType: Prefix
backend:
service:
name: orders-srv
port:
number: 3000
- path: /api/payments/?(.*)
pathType: Prefix
backend:
service:
name: payments-srv
port:
number: 3000
- path: /?(.*)
pathType: Prefix
backend:
service:
name: client-srv
port:
number: 3000
essentially when I hit http://ticket.devaibhav.live the request should be mapped to the last rule where it must be routed to client-srv.
client deployment and service
apiVersion: apps/v1
kind: Deployment
metadata:
name: client-depl
spec:
replicas: 1
selector:
matchLabels:
app: client
template:
metadata:
labels:
app: client
spec:
containers:
- name: client
image: vaibhav908/client
---
apiVersion: v1
kind: Service
metadata:
name: client-srv
spec:
selector:
app: client
ports:
- name: client
protocol: TCP
port: 3000
targetPort: 3000
The above configuration works well on the development server where I am using minikube.
I am unable to understand where I am going wrong with the configuration. I will provide more details as I feel it would be necessary.
[edit]
on the cluster that is deployed
kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
client-srv ClusterIP 10.245.100.25 <none> 3000/TCP 2d17h
and some other services
kubectl describe ingress
Name: ingress-service
Labels: <none>
Namespace: default
Address: ticket.devaibhav.live
Default backend: default-http-backend:80 (<error: endpoints "default-http-backend" not found>)
Rules:
Host Path Backends
---- ---- --------
ticket.devaibhav.live
/api/users/?(.*) auth-srv:3000 (10.244.1.76:3000)
/api/tickets/?(.*) tickets-srv:3000 (10.244.0.145:3000)
/api/orders/?(.*) orders-srv:3000 (10.244.1.121:3000)
/api/payments/?(.*) payments-srv:3000 (10.244.1.48:3000)
/?(.*) client-srv:3000 (10.244.1.32:3000)
Annotations: kubernetes.io/ingress.class: nginx
nginx.ingress.kubernetes.io/use-regex: true
Events: <none>