Ansible MCP Server
by tarnover
main.tf•7.99 kB
# Compute Module
# Creates Auto Scaling Group and Launch Template for EC2 instances
# Get the latest Amazon Linux 2 AMI
data "aws_ami" "amazon_linux_2" {
most_recent = true
owners = ["amazon"]
filter {
name = "name"
values = ["amzn2-ami-hvm-*-x86_64-gp2"]
}
filter {
name = "virtualization-type"
values = ["hvm"]
}
}
# User data script for EC2 instances
locals {
user_data = <<-EOF
#!/bin/bash
# Update system packages
yum update -y
# Install Apache, PHP, and other required packages
yum install -y httpd php php-mysqlnd amazon-efs-utils
# Start and enable Apache
systemctl start httpd
systemctl enable httpd
# Create EFS mount point
mkdir -p ${var.efs_mount_point}
# Mount EFS
echo "${var.efs_id}:/ ${var.efs_mount_point} efs _netdev,tls,iam 0 0" >> /etc/fstab
mount -a
# Set proper permissions
chown apache:apache ${var.efs_mount_point}
# Create a simple health check file
cat > /var/www/html/health.php << 'HEALTHFILE'
<?php
header('Content-Type: application/json');
echo json_encode(['status' => 'healthy', 'timestamp' => time()]);
?>
HEALTHFILE
# Create a simple info file
cat > /var/www/html/info.php << 'INFOFILE'
<?php
phpinfo();
?>
INFOFILE
# Create a simple index file
cat > /var/www/html/index.php << 'INDEXFILE'
<!DOCTYPE html>
<html>
<head>
<title>LAMP Stack</title>
<style>
body {
font-family: Arial, sans-serif;
margin: 0;
padding: 20px;
background-color: #f4f4f4;
}
.container {
max-width: 800px;
margin: 0 auto;
background-color: white;
padding: 20px;
border-radius: 5px;
box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}
h1 {
color: #333;
}
.status {
padding: 10px;
background-color: #e7f3fe;
border-left: 3px solid #2196F3;
margin-bottom: 20px;
}
.db-status {
margin-top: 20px;
padding: 15px;
background-color: #f1f1f1;
border-radius: 4px;
}
</style>
</head>
<body>
<div class="container">
<h1>LAMP Stack on AWS</h1>
<div class="status">
<p>Server is running successfully!</p>
<p>PHP Version: <?php echo phpversion(); ?></p>
</div>
<div class="db-status">
<h2>Database Connection Test</h2>
<?php
$host = '${var.db_endpoint}';
$dbname = '${var.db_name}';
$username = '${var.db_username}';
$password = '${var.db_password}';
try {
$conn = new PDO("mysql:host=$host;dbname=$dbname", $username, $password);
$conn->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
echo "<p style='color:green'>Connected successfully to the database!</p>";
} catch(PDOException $e) {
echo "<p style='color:red'>Connection failed: " . $e->getMessage() . "</p>";
}
?>
</div>
<p>This is a simple LAMP stack running on AWS with:</p>
<ul>
<li>Linux (Amazon Linux 2)</li>
<li>Apache Web Server</li>
<li>MySQL (Amazon RDS)</li>
<li>PHP <?php echo phpversion(); ?></li>
</ul>
<p>Shared storage is provided by Amazon EFS mounted at: <?php echo '${var.efs_mount_point}'; ?></p>
<p>Current time: <?php echo date('Y-m-d H:i:s'); ?></p>
<p>Server IP: <?php echo $_SERVER['SERVER_ADDR']; ?></p>
</div>
</body>
</html>
INDEXFILE
# Set proper permissions
chmod 644 /var/www/html/health.php
chmod 644 /var/www/html/info.php
chmod 644 /var/www/html/index.php
chown apache:apache /var/www/html/health.php
chown apache:apache /var/www/html/info.php
chown apache:apache /var/www/html/index.php
# Restart Apache to apply changes
systemctl restart httpd
EOF
}
# Launch Template
resource "aws_launch_template" "main" {
name_prefix = "${var.project_name}-${var.environment}-lt-"
image_id = data.aws_ami.amazon_linux_2.id
instance_type = var.instance_type
key_name = var.key_name
iam_instance_profile {
name = var.iam_instance_profile
}
network_interfaces {
associate_public_ip_address = false
security_groups = [var.security_group_id]
delete_on_termination = true
}
block_device_mappings {
device_name = "/dev/xvda"
ebs {
volume_size = 20
volume_type = "gp3"
delete_on_termination = true
encrypted = true
}
}
user_data = base64encode(local.user_data)
tag_specifications {
resource_type = "instance"
tags = merge(
var.tags,
{
Name = "${var.project_name}-${var.environment}-web-server"
}
)
}
tag_specifications {
resource_type = "volume"
tags = merge(
var.tags,
{
Name = "${var.project_name}-${var.environment}-web-server-volume"
}
)
}
lifecycle {
create_before_destroy = true
}
}
# Auto Scaling Group
resource "aws_autoscaling_group" "main" {
name = "${var.project_name}-${var.environment}-asg"
vpc_zone_identifier = var.subnet_ids
min_size = var.min_size
max_size = var.max_size
desired_capacity = var.desired_capacity
launch_template {
id = aws_launch_template.main.id
version = "$Latest"
}
target_group_arns = var.target_group_arns
health_check_type = "ELB"
health_check_grace_period = 300
default_cooldown = 300
force_delete = false
termination_policies = ["OldestInstance"]
dynamic "tag" {
for_each = merge(
var.tags,
{
Name = "${var.project_name}-${var.environment}-web-server"
}
)
content {
key = tag.key
value = tag.value
propagate_at_launch = true
}
}
lifecycle {
create_before_destroy = true
}
}
# Auto Scaling Policies
resource "aws_autoscaling_policy" "scale_up" {
name = "${var.project_name}-${var.environment}-scale-up"
autoscaling_group_name = aws_autoscaling_group.main.name
adjustment_type = "ChangeInCapacity"
scaling_adjustment = 1
cooldown = 300
}
resource "aws_autoscaling_policy" "scale_down" {
name = "${var.project_name}-${var.environment}-scale-down"
autoscaling_group_name = aws_autoscaling_group.main.name
adjustment_type = "ChangeInCapacity"
scaling_adjustment = -1
cooldown = 300
}
# CloudWatch Alarms for Auto Scaling
resource "aws_cloudwatch_metric_alarm" "high_cpu" {
alarm_name = "${var.project_name}-${var.environment}-high-cpu"
comparison_operator = "GreaterThanThreshold"
evaluation_periods = 2
metric_name = "CPUUtilization"
namespace = "AWS/EC2"
period = 300
statistic = "Average"
threshold = 70
alarm_description = "Scale up if CPU utilization is above 70% for 10 minutes"
dimensions = {
AutoScalingGroupName = aws_autoscaling_group.main.name
}
alarm_actions = [aws_autoscaling_policy.scale_up.arn]
}
resource "aws_cloudwatch_metric_alarm" "low_cpu" {
alarm_name = "${var.project_name}-${var.environment}-low-cpu"
comparison_operator = "LessThanThreshold"
evaluation_periods = 2
metric_name = "CPUUtilization"
namespace = "AWS/EC2"
period = 300
statistic = "Average"
threshold = 30
alarm_description = "Scale down if CPU utilization is below 30% for 10 minutes"
dimensions = {
AutoScalingGroupName = aws_autoscaling_group.main.name
}
alarm_actions = [aws_autoscaling_policy.scale_down.arn]
}
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