Bind nginx-ingress to static IP Address - amazon-web-services

Question

I want to set up an ingress controller on AWS EKS for several microservices that are accessed from an external system.
The microservices are accessed via virtual host-names like svc1.acme.com, svc2.acme.com, ...
I set up the nginx ingress controller with a helm chart: https://github.com/helm/charts/tree/master/stable/nginx-ingress
My idea was to reserve an Elastic IP Address and bind the nginx-controller to that IP by setting the variable externalIP.
This way I should be able to access the services with a stable wildcard DNS entry *.acme.com --> 54.72.43.19
I can see that the ingress controller service get the externalIP, but the IP is not accessible.
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
ingress-nginx-ingress-controller LoadBalancer 10.100.45.119 54.72.43.19 80:32104/TCP,443:31771/TCP 1m
Any idea why?
Update:
I installed the ingress controller with this command:
helm install --name ingress -f values.yaml stable/nginx-ingress
Here is the gist for values, the only thing changed from the default is
externalIPs: ["54.72.43.19"]
https://gist.github.com/christianwoehrle/3b136023b1e0085b028a67ca6a0959b7

Answer 1

Maybe you can achieve that by using a Network Load Balancer (https://docs.aws.amazon.com/elasticloadbalancing/latest/network/introduction.html), that supports fixed IPs, as the backing for your Nginx ingress, eg (https://aws.amazon.com/blogs/opensource/network-load-balancer-support-in-kubernetes-1-9/):
apiVersion: v1
kind: Service
metadata:
name: nginx
namespace: default
labels:
app: nginx
annotations:
service.beta.kubernetes.io/aws-load-balancer-type: "nlb"
spec:
externalTrafficPolicy: Local
ports:
- name: http
port: 80
protocol: TCP
targetPort: 80
selector:
app: nginx
type: LoadBalancer