Get GKE cluster name using Metadata Endpoint

Why

You need to get the cluster name in a script being run within the cluster

How

curl -H "Metadata-Flavor: Google" http://metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-name

GoPythonPHP

package main

import (
        "fmt"
        "net/http"
)

func main() {
        client := &http.Client{}
        req, err := http.NewRequest("GET", "http://metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-name", nil)
        if err != nil {
                panic(err)
        }
        req.Header.Add("Metadata-Flavor", "Google")
        resp, err := client.Do(req)
        if err != nil {
                panic(err)
        }
        defer resp.Body.Close()
        fmt.Println("response Status:", resp.Status)
        // Print the response body
        buf := make([]byte, 1024)
        n, err := resp.Body.Read(buf)
        if err != nil {
                panic(err)
        }
        fmt.Println("response Body:", string(buf[:n]))
}

import requests

headers = {
    'Metadata-Flavor': 'Google'
}

response = requests.get('http://metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-name', headers=headers)

print(response.text)

<?php

$headers = array(
    'Metadata-Flavor: Google',
);

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://metadata.google.internal/computeMetadata/v1/instance/attributes/cluster-name");
curl_setopt($ch, CURLOPT_HTTPHEADER, $headers);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);

$response = curl_exec($ch);

if (curl_errno($ch)) {
    echo 'Error:' . curl_error($ch);
}

curl_close($ch);

echo $response;

?>

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