Below is a PHP code example that demonstrates how to create a pre-authentication login form to start and stop an Amazon EC2 instance using the AWS SDK for PHP (AWS SDK version 3). This example assumes that you have already set up your AWS credentials and installed the AWS SDK for PHP using Composer.
You can store your AWS credentials in a separate file and include that file in your main script. This practice is helpful for keeping sensitive information separate from your code. Here’s how you can do it:
- Create a file named
config.php(or any other suitable name) in the same directory as your main script (index.php):
<?php
// config.php
// AWS credentials
$awsCredentials = [
'key' => 'YOUR_AWS_ACCESS_KEY',
'secret' => 'YOUR_AWS_SECRET_KEY',
'region' => 'us-east-1', // Update with your desired region
];
$instanceId = 'YOUR_INSTANCE_ID';
// Authentication credentials
$loginCredentials = [
'username' => 'admin', // Update with your desired username
'password' => 'admin123', // Update with your desired password
];
?>Make sure to replace 'YOUR_AWS_ACCESS_KEY', 'YOUR_AWS_SECRET_KEY', 'us-east-1', and 'YOUR_INSTANCE_ID' with your actual AWS credentials, region, and EC2 instance ID. Also, ensure that you have updated your username and password with your choice.
Main Script
Now create the main script with a name (index.php). This version of the code includes Bootstrap classes for styling the login and control forms. the error message will be displayed within the form if the login credentials are invalid. This code keeps the error message displayed on the login form until a successful login attempt is made. Once successfully logged in, the “Start” and “Stop” options will be shown.
<!DOCTYPE html>
<html>
<head>
<title>EC2 Instance Control</title>
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.5.2/css/bootstrap.min.css">
</head>
<body>
<div class="container mt-5">
<div class="card">
<div class="card-header">
<?php
// Check if the user is logged in
session_start();
if (isset($_SESSION['loggedin']) && $_SESSION['loggedin'] === true) {
echo '<h2 class="card-title">EC2 Instance Control</h2>';
} else {
echo '<h2 class="card-title">Login</h2>';
}
?>
</div>
<div class="card-body">
<?php
require 'vendor/autoload.php'; // Load AWS SDK
require 'config.php'; // Include the AWS and authentication credentials
use Aws\Ec2\Ec2Client;
// Initialize EC2 client
$ec2Client = new Ec2Client([
'credentials' => $awsCredentials,
'region' => $awsCredentials['region'], // Pass the region directly
'version' => 'latest',
]);
// Initialize variables for displaying the options
$startOption = '';
$stopOption = '';
$errorMessage = '';
// Check if the user is logged in
if (isset($_SESSION['loggedin']) && $_SESSION['loggedin'] === true) {
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
if (isset($_POST['start'])) {
// Start the EC2 instance
$result = $ec2Client->startInstances([
'InstanceIds' => [$instanceId],
]);
echo 'Instance started successfully.';
} elseif (isset($_POST['stop'])) {
// Stop the EC2 instance
$result = $ec2Client->stopInstances([
'InstanceIds' => [$instanceId],
]);
echo 'Instance stopped successfully.';
}
}
// Set the options for displaying after successful login
$startOption = '<button type="submit" name="start" class="btn btn-success">Start Instance</button>';
$stopOption = '<button type="submit" name="stop" class="btn btn-danger">Stop Instance</button>';
} else {
// Check if the login form was submitted
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
$username = $_POST['username'];
$password = $_POST['password'];
// Perform basic authentication (for demonstration purposes)
if ($username === $loginCredentials['username'] && $password === $loginCredentials['password']) {
$_SESSION['loggedin'] = true;
header("Refresh:0"); // Refresh the page to show control options
} else {
$errorMessage = 'Invalid username or password.';
}
}
}
?>
<?php if (!isset($_SESSION['loggedin']) || $_SESSION['loggedin'] !== true) : ?>
<form method="post">
<div class="form-group">
<label for="username">Username:</label>
<input type="text" class="form-control" id="username" name="username" required>
</div>
<div class="form-group">
<label for="password">Password:</label>
<input type="password" class="form-control" id="password" name="password" required>
</div>
<?php if (!empty($errorMessage)) : ?>
<div class="alert alert-danger"><?php echo $errorMessage; ?></div>
<?php endif; ?>
<button type="submit" class="btn btn-primary">Login</button>
</form>
<?php else : ?>
<?php
try {
$result = $ec2Client->describeInstances([
'InstanceIds' => [$instanceId],
]);
foreach ($result['Reservations'] as $reservation) {
foreach ($reservation['Instances'] as $instance) {
$instanceId = $instance['InstanceId'];
$instanceState = $instance['State']['Name'];
$instanceType = $instance['InstanceType'];
$publicIpAddress = isset($instance['PublicIpAddress']) ? $instance['PublicIpAddress'] : 'N/A';
echo '<div class="container">';
echo "<h5><Instance ID: $instanceId</h5>";
echo "<p>Instance State: $instanceState</p>";
echo "<p>Instance Type: $instanceType</p>";
echo "<p>Public IP Address: $publicIpAddress</p>";
echo '</div>';
}
}
} catch (Exception $e) {
echo "<p>Error: " . $e->getMessage() . "</p>";
}
?>
<form method="post">
<?php echo $startOption; ?>
<?php echo $stopOption; ?>
<button type="button" class="btn btn-secondary ml-3" onclick="window.location.href='logout.php'">Logout</button>
</form>
<?php endif; ?>
</div>
</div>
</div>
</body>
</html>I’ve introduced a logout button that redirects the user to a separate logout.php script for handling the logout process. The main script now uses sessions to keep track of whether the user is logged in or not. When the user successfully logs in, a session variable loggedin is set to true, and the control options are displayed. The user can click the “Logout” button to log out and be redirected back to the login page.
Please note that you’ll need to create a logout.php file in the same directory as this script with the following content:
<?php
session_start();
session_unset();
session_destroy();
header("Location: index.php");
exit;
?>That’s it. All done. You can deploy this code to your PHP web server and manage the start and stop of ec2 instances.
The above source code is also available at GitHub repo: https://github.com/rajeshsupernova/manage-ec2/tree/main