Ec2 – ahmadrazalab

Amazon EC2 Resources in Terraform

1. EC2 Instance

Resource Block:

resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0" # Replace with your AMI ID
  instance_type = "t2.micro"
  key_name      = aws_key_pair.example.key_name
 
  tags = {
    Name = "example-instance"
  }
}

Notes:

ami specifies the Amazon Machine Image (AMI) ID to use for the instance.
instance_type defines the type of instance (e.g., t2.micro).
key_name specifies the key pair for SSH access.

2. EC2 Key Pair

Resource Block:

resource "aws_key_pair" "example" {
  key_name   = "example-key"
  public_key = file("~/.ssh/id_rsa.pub") # Path to your public key file
}

Notes:

key_name specifies the name of the key pair.
public_key points to the public key file.

3. EC2 Security Group

Resource Block:

resource "aws_security_group" "example" {
  name_prefix = "example-sg-"
  description  = "Security group for example EC2 instance"
  
  ingress {
    from_port   = 22
    to_port     = 22
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
 
  ingress {
    from_port   = 80
    to_port     = 80
    protocol    = "tcp"
    cidr_blocks = ["0.0.0.0/0"]
  }
 
  egress {
    from_port   = 0
    to_port     = 0
    protocol    = "-1"
    cidr_blocks = ["0.0.0.0/0"]
  }
 
  tags = {
    Name = "example-sg"
  }
}

Notes:

ingress specifies the inbound rules for the security group.
egress specifies the outbound rules for the security group.
cidr_blocks determines the allowed IP addresses or ranges.

4. EC2 EBS Volume

Resource Block:

resource "aws_ebs_volume" "example" {
  availability_zone = "us-west-2a" # Replace with your AZ
  size              = 10 # Size in GB
  type              = "gp2"
 
  tags = {
    Name = "example-ebs-volume"
  }
}

Notes:

availability_zone specifies the Availability Zone.
size determines the volume size in GB.
type specifies the volume type (e.g., gp2).

5. EC2 EBS Volume Attachment

Resource Block:

resource "aws_volume_attachment" "example" {
  device_name = "/dev/xvdf"
  volume_id   = aws_ebs_volume.example.id
  instance_id = aws_instance.example.id
}

Notes:

device_name specifies the device name to mount the volume.
volume_id is the ID of the EBS volume.
instance_id is the ID of the EC2 instance to attach the volume.

6. EC2 Launch Configuration

Resource Block:

resource "aws_launch_configuration" "example" {
  name          = "example-launch-configuration"
  image_id       = "ami-0c55b159cbfafe1f0" # Replace with your AMI ID
  instance_type  = "t2.micro"
  key_name       = aws_key_pair.example.key_name
 
  lifecycle {
    create_before_destroy = true
  }
}

Notes:

name specifies the launch configuration name.
image_id is the AMI ID.
instance_type defines the instance type.
lifecycle block ensures that the new launch configuration is created before the old one is destroyed.

7. EC2 Auto Scaling Group

Resource Block:

resource "aws_autoscaling_group" "example" {
  launch_configuration = aws_launch_configuration.example.id
  min_size             = 1
  max_size             = 3
  desired_capacity     = 2
  vpc_zone_identifier  = ["subnet-0bb1c79de4EXAMPLE"] # Replace with your subnet ID
 
  tag {
    key                 = "Name"
    value               = "example-asg-instance"
    propagate_at_launch = true
  }
}

Notes:

launch_configuration refers to the launch configuration for the ASG.
min_size, max_size, and desired_capacity define the scaling policies.
vpc_zone_identifier specifies the subnet IDs for the ASG.

8. EC2 Elastic IP

Resource Block:

resource "aws_eip" "example" {
  instance = aws_instance.example.id
 
  tags = {
    Name = "example-eip"
  }
}

Notes:

instance associates the EIP with an EC2 instance.

9. EC2 Spot Instance

Resource Block:

resource "aws_instance" "example" {
  ami           = "ami-0c55b159cbfafe1f0" # Replace with your AMI ID
  instance_type = "t2.micro"
  spot_price    = "0.03" # Maximum price you're willing to pay per hour
  key_name      = aws_key_pair.example.key_name
 
  tags = {
    Name = "example-spot-instance"
  }
}

Notes:

spot_price specifies the maximum price you're willing to pay for the spot instance.

10. EC2 Instance Metadata Options

Resource Block:

resource "aws_instance" "example" {
  ami                  = "ami-0c55b159cbfafe1f0" # Replace with your AMI ID
  instance_type        = "t2.micro"
  key_name             = aws_key_pair.example.key_name
 
  metadata_options {
    http_tokens = "required"
    http_put_responseHopLimit = 2
  }
 
  tags = {
    Name = "example-instance-with-metadata"
  }
}

Notes:

metadata_options configures the instance metadata options.

Summary

This guide provides a comprehensive overview of managing EC2 resources using Terraform. You can use these configurations to deploy and manage EC2 instances and associated resources efficiently. Adjust the parameters and resource configurations as needed for your specific use case.🚀

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