Kubernetes Cluster Add-ons - Private Cloud

Kubernetes Add-ons

external-dns

ExternalDNS is a Kubernetes add-on that configures public DNS servers with information about exposed Kubernetes services to make them discoverable.

To install ExternalDNS, follow these steps:

Add the bitnami helm repository:

helm repo add bitnami https://charts.bitnami.com/bitnami

Update the helm repository to get the latest software:
```
helm repo update
```

Create a file called external-dns-values.yaml and populate it with the following helm values:

aws:
  zoneType: public
domainFilters:
  - <eks_domain_zone_name from terraform output>
policy: sync
provider: aws
txtOwnerId: <eks_domain_zone_id from terraform output>
serviceAccount:
  create: false
  name: external-dns

Helm install command assumes service account for ExternalDNS already exists.

Service Account name set to metadata.name under iam.serviceAccounts portion in the uepe-eks.yaml file in Set Up Kubernetes Cluster - AWS section

Install the ExternalDNS helm chart:
```
helm install external-dns bitnami/external-dns -n uepe \
--version <helm chart version> -f external-dns-values.yaml
```
Where <helm chart version> is a compatible version listed in the Compatibility Matrix.

Namespace set to metadata.namespace under iam.serviceAccounts portion in the uepe-eks.yaml file in Set Up Kubernetes Cluster - Private Cloud section

ingress-nginx-controller

This is an optional add-on.

The Ingress NGINX Controller is an ingress controller for Kubernetes using NGINX as a reverse proxy and load balancer.

To install the Ingress NGINX Controller, follow these steps:

Add the ingress-nginx helm repository:

helm repo add ingress-nginx https://kubernetes.github.io/ingress-nginx

Update the helm repository to get the latest software:
```
helm repo update
```

Create a file called ingress-nginx-values.yaml and populate it with the following helm values:

controller:
  scope:
    enabled: true
  admissionWebhooks:
    enabled: false
  metrics:
    enabled: false
    serviceMonitor:
      enabled: false
  ingressClassResource:
    name: nginx
    enabled: true
    default: false
    controllerValue: "k8s.io/ingress-nginx"
  watchIngressWithoutClass: false
  service:
    targetPorts:
      http: 80
      https: 443
    type: NodePort
  extraArgs:
    v: 1
serviceAccount:
  create: false

Install the ingress-nginx-controller helm chart:
```
helm install ingress-nginx ingress-nginx/ingress-nginx --version <helm chart version> -f ingress-nginx-values.yaml -n uepe
```
Where <helm chart version> is a compatible version listed in the Compatibility Matrix.

Executing helm list should show all add-ons added in this section. Example:

NAME                        	NAMESPACE	REVISION	UPDATED                             	STATUS  	CHART                             	APP VERSION
aws-efs-csi-driver          	uepe     	1       	2024-02-06 14:00:36.817518 +0800 +08	deployed	aws-efs-csi-driver-2.5.4          	1.7.4      
aws-load-balancer-controller	uepe     	1       	2024-02-06 14:09:22.86071 +0800 +08 	deployed	aws-load-balancer-controller-1.7.0	v2.7.0     
external-dns                	uepe     	1       	2024-02-06 14:06:28.705309 +0800 +08	deployed	external-dns-6.31.5               	0.14.0     
ingress-nginx-controller        uepe     	1       	2024-02-22 11:44:54.18561 +0800 +08 	deployed	ingress-nginx-4.9.1               	1.9.6

This section is now complete. Now proceed to the Usage Engine Private Edition Preparations - AWS section.