jenkins-reference.tf

# configured aws provider with proper credentials
provider "aws" {
  region    = "us-east-1"
  profile   = "terraform-user"
}


# create default vpc if one does not exit
resource "aws_default_vpc" "default_vpc" {

  tags    = {
    Name  = "default vpc"
  }
}


# use data source to get all avalablility zones in region
data "aws_availability_zones" "available_zones" {}


# create default subnet if one does not exit
resource "aws_default_subnet" "default_az1" {
  availability_zone = data.aws_availability_zones.available_zones.names[0]

  tags   = {
    Name = "default subnet"
  }
}


# create security group for the ec2 instance
resource "aws_security_group" "ec2_security_group" {
  name        = "ec2 security group"
  description = "allow access on ports 8080 and 22"
  vpc_id      = 

  # allow access on port 8080
  ingress {
    description      = "http proxy access"
    from_port        = 
    to_port          = 
    protocol         = 
    cidr_blocks      = 
  }

  # allow access on port 22
  ingress {
    description      = "ssh access"
    from_port        = 
    to_port          = 
    protocol         = 
    cidr_blocks      = 
  }

  egress {
    from_port        = 
    to_port          = 
    protocol         = 
    cidr_blocks      = 
  }

  tags   = {
    Name = "jenkins server security group"
  }
}


# use data source to get a registered amazon linux 2 ami
data "aws_ami" "amazon_linux_2" {
  most_recent = true
  owners      = ["amazon"]
  
  filter {
    name   = "owner-alias"
    values = ["amazon"]
  }

  filter {
    name   = "name"
    values = ["amzn2-ami-hvm*"]
  }
}


# launch the ec2 instance and install website
resource "aws_instance" "ec2_instance" {
  ami                    = 
  instance_type          = 
  subnet_id              = 
  vpc_security_group_ids = 
  key_name               = 
  # user_data            = file("install_jenkins.sh")

  tags = {
    Name = 
  }
}


# an empty resource block
resource "null_resource" "name" {

  # ssh into the ec2 instance 
  connection {
    type        = 
    user        = 
    private_key = file()
    host        = 
  }

  # copy the install_jenkins.sh file from your computer to the ec2 instance 
  provisioner "file" {
    source      = 
    destination = 
  }

  # set permissions and run the install_jenkins.sh file
  provisioner "remote-exec" {
    inline = [
    ]
  }

  # wait for ec2 to be created
  depends_on = []
}


# print the url of the jenkins server
output "website_url" {
  value     = join ("", ["http://", aws_instance.ec2_instance.public_dns, ":", "8080"])
}