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How To Set Up AWS Load Balancer Controller

Set Up AWS Load Balancer Controller

  • Go to https://docs.aws.amazon.com/eks/latest/userguide/aws-load-balancer-controller.html and follow installation instructions.

  • Get arn account number by running command:

    aws sts get-caller-identity
    

    This is needed for creating the iamserviceaccount.

  • Here is a condensed version of the instructions:

    • Create IAM OIDC provider for cluster.

      oidc_id=$(aws eks describe-cluster --name my-cluster --query "cluster.identity.oidc.issuer" --output text | cut -d '/' -f 5)
      
      aws iam list-open-id-connect-providers | grep $oidc_id
      
      eksctl utils associate-iam-oidc-provider --cluster my-cluster --approve
      
    • Set up Load Balancer. Note: Replace the arn account number and cluster name where applicable.

    curl -o iam_policy.json https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.4.4/docs/install/iam_policy.json
    
    aws iam create-policy \
        --policy-name AWSLoadBalancerControllerIAMPolicy \
        --policy-document file://iam_policy.json
    
    eksctl create iamserviceaccount \
      --cluster=my-cluster \
      --namespace=kube-system \
      --name=aws-load-balancer-controller \
      --role-name "AmazonEKSLoadBalancerControllerRole" \
      --attach-policy-arn=arn:aws:iam::111122223333:policy/AWSLoadBalancerControllerIAMPolicy \
      --approve
    
    kubectl apply \
        --validate=false \
        -f https://github.com/jetstack/cert-manager/releases/download/v1.5.4/cert-manager.yaml
    
    curl -Lo v2_4_4_full.yaml https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/download/v2.4.4/v2_4_4_full.yaml
    
    sed -i.bak -e '480,488d' ./v2_4_4_full.yaml
    
    sed -i.bak -e 's|your-cluster-name|my-cluster|' ./v2_4_4_full.yaml
    
    kubectl apply -f v2_4_4_full.yaml
    
    curl -Lo v2_4_4_ingclass.yaml https://github.com/kubernetes-sigs/aws-load-balancer-controller/releases/download/v2.4.4/v2_4_4_ingclass.yaml
    
    kubectl apply -f v2_4_4_ingclass.yaml
    
    • Verify controller is installed.

      kubectl get deployment -n kube-system aws-load-balancer-controller
      

Set up Ingress

  • Go to https://raw.githubusercontent.com/kubernetes-sigs/aws-load-balancer-controller/v2.4.4/docs/examples/2048/2048_full.yaml. Note the Ingress section.

  • Copy the ingress configuration and change the configuration to point to myapp. ingress.yaml

    apiVersion: networking.k8s.io/v1
    kind: Ingress
    metadata:
      namespace: default
      name: my-ingress
      annotations:
        alb.ingress.kubernetes.io/scheme: internet-facing
        alb.ingress.kubernetes.io/target-type: ip
    spec:
      ingressClassName: alb
      rules:
        - http:
            paths:
              - path: /
                pathType: Prefix
                backend:
                  service:
                    name: myapp
                    port:
                      number: 80
    
  • Apply the ingress.

    kubectl apply -f ingress.yaml
    
  • Confirm load balancer. This may take a few minutes.

    kubectl get ingress
    

References

  • https://docs.aws.amazon.com/eks/latest/userguide/alb-ingress.html
  • https://docs.aws.amazon.com/eks/latest/userguide/aws-load-balancer-controller.html
  • https://kubernetes.io/docs/concepts/services-networking/ingress/