Generate K8S configs for all GKE clusters under a GCP Project

get_kubeconfigs.sh

#!/bin/bash

if ! command -v gcloud &> /dev/null
then
    echo "gcloud could not be found. Please install the Google Cloud SDK."
    exit 1
fi

if ! command -v kubectl &> /dev/null
then
    echo "kubectl could not be found. Please install kubectl."
    exit 1
fi

# Ensure the user is authenticated with gcloud
if ! gcloud auth list --filter=status:ACTIVE --format="value(account)" &> /dev/null
then
    echo "You are not authenticated with gcloud. Please run 'gcloud auth login' first."
    exit 1
fi

PROJECT_ID=$(gcloud config get-value project)
if [ -z "$PROJECT_ID" ]
then
    echo "No project ID set. Please set a project ID with 'gcloud config set project PROJECT_ID'"
    exit 1
fi

echo "Generating kubeconfigs for GKE clusters in project: $PROJECT_ID"

CLUSTERS=$(gcloud container clusters list --format="value(name,zone)")

if [ -z "$CLUSTERS" ]
then
    echo "No GKE clusters found in the project."
    exit 0
fi

KUBECONFIG_DIR="./kubeconfigs"
mkdir -p "$KUBECONFIG_DIR"

while IFS= read -r cluster; do
    CLUSTER_NAME=$(echo $cluster | cut -d' ' -f1)
    CLUSTER_ZONE=$(echo $cluster | cut -d' ' -f2)
    
    echo "Generating kubeconfig for cluster: $CLUSTER_NAME in zone: $CLUSTER_ZONE"
    
    KUBECONFIG_FILE="$KUBECONFIG_DIR/kubeconfig_${CLUSTER_NAME}"
    
    gcloud container clusters get-credentials "$CLUSTER_NAME" --zone "$CLUSTER_ZONE" --project "$PROJECT_ID"
    
    # Save the current context to a separate file
    kubectl config view --raw > "$KUBECONFIG_FILE"
    
    echo "Kubeconfig saved to: $KUBECONFIG_FILE"
done <<< "$CLUSTERS"

echo "All kubeconfigs have been generated and saved in the '$KUBECONFIG_DIR' directory."