Kong-name-resolution-failed-AKS

I made kong deploy on azure aks kuberneteste. I got an error like this, what should I do?
message:name resolution failed.

I did the implementation with

Example values.yaml

deployment:
kong:
enabled: true

env:
prefix: /kong_prefix/
password: admin
database: “postgres”
pg_host : kong-postgresql
pg_port : 5432
pg_timeout : 5000
pg_user : “kong”
pg_password : admin
pg_database : “kong”
nginx_worker_processes: “1”
proxy_access_log: /dev/stdout
admin_access_log: /dev/stdout
admin_gui_access_log: /dev/stdout
portal_api_access_log: /dev/stdout
proxy_error_log: /dev/stderr
admin_error_log: /dev/stderr
admin_gui_error_log: /dev/stderr
portal_api_error_log: /dev/stderr
postgresqlPassword: admin
postgresPassword: admin
KONG_PG_PASSWORD: admin

image:
repository: kong/kong-gateway
tag: “2.7”

admin:
enabled: true
#type: NodePort

http:
enabled: true
servicePort: 8001
containerPort: 8001

tls:
enabled: false
servicePort: 8444
containerPort: 8444
parameters:
- http2

ingress:
enabled: true
tls: kong-cps-kong-admin
hostname: ‘@HOST_NAME_ADMIN@’
annotations:
kubernetes.io/ingress.class: nginx
cert-manager.io/cluster-issuer: ca-cps-issuer
kubernetes.io/tls-acme: true
konghq.com/preserve-host: “false”
nginx.ingress.kubernetes.io/force-ssl-redirect: “true”
path: /
pathType: Prefix

proxy:
enabled: true
type: ClusterIP

http:
enabled: true
servicePort: 80
containerPort: 8000

tls:
enabled: false
servicePort: 443
containerPort: 8443
parameters:
- http2

ingress:
enabled: true
tls: kong-cps-kong-proxy
hostname: ‘@HOST_NAME@’
annotations:
kubernetes.io/ingress.class: “nginx”
cert-manager.io/cluster-issuer: ca-cps-issuer
kubernetes.io/tls-acme: “true”
nginx.ingress.kubernetes.io/backend-protocol: “HTTPS”
konghq.com/preserve-host: “false”
nginx.ingress.kubernetes.io/force-ssl-redirect: “true”
path: /
pathType: Prefix

ingressController:
enabled: false
installCRDs: false