Ingress resource hostname - kubernetes

Question

I have kube cluster & its control plane endpoint is haproxy. I want to use hostname of system where haproxy lies and use it as hostname in the ingress resource. Is it possible to achieve this. The request ha proxy backend config is below:
frontend k8s_frontend
bind *:6443
mode tcp
default_backend k8s_backend
backend k8s_backend
mode tcp
balance roundrobin
server master1 10.50.8.117:6443
server master2 10.50.8.118:6443
server master3 10.50.8.119:6443
frontend http_frontend
bind :80
bind :443 ssl crt /com.pem
default_backend servers
backend servers
balance roundrobin
server worker1 10.50.8.120:443 ssl verify none
server worker2 10.50.8.121:443 ssl verify none
Below is my ingress resource:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: dashboard-ingress
namespace: kubernetes-dashboard
annotations:
nginx.ingress.kubernetes.io/ssl-passthrough: "true"
nginx.ingress.kubernetes.io/backend-protocol: "HTTPS"
spec:
rules:
- host: "HAPROXY_HOSTNAME"
http:
paths:
- pathType: Prefix
path: "/k8s"
backend:
service:
name: kubernetes-dashboard
port:
number: 443

Answer 1

Yes, you can mention the hostname of HAProxy in the ingress source. The ingress controller node can be resolved as hostname along with deploying and exposing the echo server service as shown below. Kindly refer to this document.
apiVersion: networking.k8s.io/v1beta1
kind: Ingress
metadata:
annotations:
kubernetes.io/ingress.class: haproxy
name: echoserver
spec:
rules:
host: $HOST
http:
paths:
backend:
serviceName: echoserver
servicePort: 8080
path: /
EOF
More details on HAProxy Ingress Controller can be found here.