EKS Cluster fetching script

get-eks.sh

#!/bin/bash

# Function to handle keyboard input
function select_option {
    # Initialize variables
    local selected=0
    local options=("$@")
    local key=""

    # Hide cursor
    tput civis

    function print_menu {
        local idx=0
        echo -e "\nAvailable clusters:"
        for item in "${options[@]}"; do
            if [ $idx -eq $selected ]; then
                echo "➜ $item"
            else
                echo "  $item"
            fi
            ((idx++))
        done
    }

    # Clear screen before first print
    clear
    print_menu

    # Handle keyboard input
    while true; do
        # Read a single character
        read -rsn1 key

        case $key in
            $'\x1B')  # Handle ESC sequences
                read -rsn1 key
                if [[ $key = "[" ]]; then
                    read -rsn1 key
                    case $key in
                        "A")  # Up arrow
                            if [ $selected -gt 0 ]; then
                                ((selected--))
                            fi
                            ;;
                        "B")  # Down arrow
                            if [ $selected -lt $((${#options[@]}-1)) ]; then
                                ((selected++))
                            fi
                            ;;
                    esac
                fi
                ;;
            "")  # Enter key
                echo
                tput cnorm  # Show cursor
                return $selected
                ;;
        esac

        # Clear screen and reprint menu
        clear
        print_menu
    done
}

# Ensure AWS CLI is configured
if ! command -v aws &> /dev/null; then
    echo "AWS CLI is not installed. Please install it first."
    exit 1
fi

# Get clusters and store in array (macOS compatible version)
echo "Fetching EKS clusters..."
# Convert AWS output into array, splitting on whitespace
CLUSTERS=($(aws eks list-clusters --output text --query 'clusters[*]' | tr '\t' '\n'))

if [ ${#CLUSTERS[@]} -eq 0 ]; then
    echo "No EKS clusters found in the current region."
    exit 1
fi

# Show selector menu
echo "Use ↑↓ arrows to select a cluster and press Enter to confirm"
select_option "${CLUSTERS[@]}"
selected_idx=$?
CLUSTER_NAME="${CLUSTERS[$selected_idx]}"

echo "Selected cluster: $CLUSTER_NAME"

# Update kubeconfig for the selected cluster
echo "Updating kubeconfig for cluster: $CLUSTER_NAME"
aws eks update-kubeconfig --name "$CLUSTER_NAME"

if [ $? -eq 0 ]; then
    echo "Successfully configured kubectl for cluster: $CLUSTER_NAME"
    echo "You can now use kubectl commands to interact with the cluster"
    
    echo -e "\nCluster info:"
    kubectl cluster-info
else
    echo "Failed to update kubeconfig. Please check if the cluster name is correct."
    exit 1
fi