Onboard to k8s

onboard-to-k8s.sh

#!/bin/bash
## Use this script to configure kubectl for an EKS cluster using a role ARN.

function usage() {
  echo "Usage: $0 [Amazon Role ARN]"
}

if [[ -z $1 ]]; then
  usage
  exit 1
fi

rolearn=$1
contextname=${rolearn##*/}

if [[ "${rolearn}" =~ "clusteradmin" ]]; then
  clustername=${contextname%-*}
else
  cluster_namespace=${contextname%-*}
  clustername=${cluster_namespace%-*}
  namespace_role=${contextname##${clustername}-}
  namespace=${namespace_role%-*}
fi

# Update kubeconfig using aws-cli
aws eks --region us-east-2 update-kubeconfig \
  --name "${clustername}" \
  --role-arn "${rolearn}" \
  --alias "${contextname}"

# If the user is not a cluster admin, set their namespace for them
if [[ ! "${rolearn}" =~ "clusteradmin" ]]; then
  # Set the namespace to the namespace specified in the role name
  kubectl config set-context --current --namespace="${namespace}"
fi