Setting up access permissions with IAM roles for service accounts (IRSA)

Make sure that you have finished setting up Apache Livy for Amazon EMR on EKS and are in the middle of installing Apache Livy with Amazon EMR on EKS.

Create a Kubernetes namespace for the Livy server. In this example, the name of the namespace is livy-ns.

Create an IAM policy that includes the permissions for the AWS services for which you want your pods to access. The following example creates an IAM policy of getting Amazon S3 resources for the Spark entry point.

cat >my-policy.json <<EOF{
"Version": "2012-10-17",
    "Statement": [
        {
"Effect": "Allow",
            "Action": "s3:GetObject",
            "Resource": "arn:aws:s3:::my-spark-entrypoint-bucket"
        }
    ]
}
EOF

aws iam create-policy --policy-name my-policy --policy-document file://my-policy.json

Use the following command to set your AWS account ID to a variable.

account_id=$(aws sts get-caller-identity --query "Account" --output text)

Set the OpenID Connect (OIDC) identity provider of your cluster to an environment variable.

oidc_provider=$(aws eks describe-cluster --name my-cluster --region $AWS_REGION --query "cluster.identity.oidc.issuer" --output text | sed -e "s/^https:\/\///")

Set variables for the namespace and name of the service account. Be sure to use your own values.

export namespace=default
export service_account=my-service-account

Create a trust policy file with the following command. If you want to grant access of the role to all service accounts within a namespace, copy the following command, and replace StringEquals with StringLike and replace $service_account with *.

cat >trust-relationship.json <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Federated": "arn:aws:iam::$account_id:oidc-provider/$oidc_provider"
      },
      "Action": "sts:AssumeRoleWithWebIdentity",
      "Condition": {
        "StringEquals": {
          "$oidc_provider:aud": "sts.amazonaws.com",
          "$oidc_provider:sub": "system:serviceaccount:$namespace:$service_account"
        }
      }
    }
  ]
}
EOF

Create the role.

aws iam create-role --role-name my-role --assume-role-policy-document file://trust-relationship.json --description "my-role-description"

Use the following Helm install command to set the serviceAccount.executionRoleArn to map IRSA. The following is an example of the Helm install command. You can find the corresponding ECR-registry-account value for your AWS Region from Amazon ECR registry accounts by Region.

helm install livy-demo \
  oci://895885662937.dkr.ecr.us-west-2.amazonaws.com/livy \
  --version 7.5.0 \
  --namespace livy-ns \
  --set image=ECR-registry-account.dkr.ecr.region-id.amazonaws.com/livy/emr-7.5.0:latest \
  --set sparkNamespace=spark-ns \
  --set serviceAccount.executionRoleArn=arn:aws:iam::123456789012:role/my-role

Use the following command to get the Spark service account.

SPARK_NAMESPACE=<spark-ns>
LIVY_APP_NAME=<livy-app-name>
kubectl --namespace $SPARK_NAMESPACE describe sa -l "app.kubernetes.io/instance=$LIVY_APP_NAME" | awk '/^Name:/ {print $2}'

Set your variables for the namespace and name of the service account.

export namespace=default
export service_account=my-service-account

Use the following command to create a trust policy file for the IAM role. The following example gives permission to all service accounts within the namespace to use the role. To do so, replace StringEquals with StringLike and replace $service_account with *.

cat >trust-relationship.json <<EOF
{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Federated": "arn:aws:iam::$account_id:oidc-provider/$oidc_provider"
      },
      "Action": "sts:AssumeRoleWithWebIdentity",
      "Condition": {
        "StringEquals": {
          "$oidc_provider:aud": "sts.amazonaws.com",
          "$oidc_provider:sub": "system:serviceaccount:$namespace:$service_account"
        }
      }
    }
  ]
}
EOF

Create the role.

aws iam create-role --role-name my-role --assume-role-policy-document file://trust-relationship.json --description "my-role-description"

Map the server or spark service account with the following eksctl command. Make sure to use your own values.

 eksctl create iamserviceaccount --name spark-sa \
 --namespace spark-namespace --cluster livy-eks-cluster \
 --attach-role-arn arn:aws:iam::0123456789012:role/my-role \
 --approve --override-existing-serviceaccounts