Enable TLS on load balancer

StreamNative Platform supports enabling TLS with AWS Certificate Manager (ACM). When you want to perform TLS termination at the load balancer, you can use certificates with ACM. ACM handles the complexity of creating, storing, and renewing public and private SSL/TLS X.509 certificates and keys that protect your AWS websites and applications.

The load balancer offloads traffic to the backend service via TCP protocols.

One load balancer for Pulsar proxy with ports 6651/443
- The DNS name is data.pulsar.example.local
One load balancer for nginx ingress controller with port 443
- The DNS name is admin.pulsar.example.local
One load balancer for istio ingress( to KoP brokers ) with port 9093
- The DNS name is messaging.pulsar.example.local

Note

Enabling TLS with ACM is not applicable to KoP, since KoP needs TLS Server Name Indication (SNI) to route traffic that requires TLS termination on the broker side rather than the load balancer side.

To use certificates with ACM, complete the following steps.

Request a public certificate from ACM for the following domain names, and get the Amazon Resource Names (ARNs) for the certificate.
```
*.pulsar.example.local
```

In the YAML file, enable domain, configure the annotations, and use the ARN obtained above as shown.

tls:
  enabled: false
  proxy:
    enabled: false

# Domain requested from External DNS
domain:
  enabled: true
  suffix: pulsar.example.local

# Ingresses for exposing Pulsar services
ingress:
  proxy:
    enabled: true
    external_domain: data.pulsar.example.local
    type: LoadBalancer
    tls:
      enabled: true
    annotations:
      external-dns.alpha.kubernetes.io/hostname: 'data.pulsar.example.local'
      service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: 'true'
      service.beta.kubernetes.io/aws-load-balancer-type: nlb
      service.beta.kubernetes.io/aws-load-balancer-ssl-cert: '[ARN OF THE CERT]'
      # Enable this if the service is only accessed from the Amazon Virtual Private Cloud (Amazon VPC).
      #service.beta.kubernetes.io/aws-load-balancer-internal: 0.0.0.0/0
    extraSpec:
      externalTrafficPolicy: Local
# Ingresses for exposing monitoring/management services publicly
controller:
  enabled: true
  annotations:
    external-dns.alpha.kubernetes.io/hostname: 'admin.pulsar.example.local'
    service.beta.kubernetes.io/aws-load-balancer-ssl-cert: '[ARN OF THE CERT]'
    service.beta.kubernetes.io/aws-load-balancer-cross-zone-load-balancing-enabled: 'true'
  extraSpec:
    externalTrafficPolicy: Local
  # flag whether to terminate the tls at the loadbalancer level
  tls:
    termination: true
control_center:
  enabled: true
  tls:
    enabled: true
  # Set external domain for the load balancer of the ingress controller
  external_domain: admin.pulsar.example.local
  external_domain_scheme: https://

Apply the changes by restarting the Pulsar proxy.

helm upgrade -f /path/to/your/file.yaml <release_name> streamnative/sn-platform -n <k8s_namespace>