Step 1: Install Terraform and Apache

Before configuring virtual hosts, ensure Terraform and Apache are installed on your Ubuntu server.

Install Terraform:

Download and install Terraform from the official website or use the package manager:

sudo apt-get install terraform

Verify the installation:

terraform --version

Install Apache:

Install Apache with the following command:

sudo apt install apache2 -y

Start and enable Apache to run at boot:

sudo systemctl start apache2
sudo systemctl enable apache2

Step 2: Create a Terraform Configuration for Apache Virtual Hosts

In this step, we will create a Terraform configuration file that provisions an Apache server and configures virtual hosts. Begin by creating a new directory for your Terraform project and navigate to it:

mkdir apache-vhosts
cd apache-vhosts

Create a new main.tf file for your Terraform configuration:

nano main.tf

Add the following Terraform code to define the Apache installation and virtual host configuration:

provider "local" {}

resource "null_resource" "configure_apache" {
  provisioner "remote-exec" {
    inline = [
      "sudo apt-get update",
      "sudo apt-get install apache2 -y",
      "sudo a2enmod vhost_alias"
    ]
  }
}

resource "local_file" "vhost1" {
  content = <
    ServerAdmin webmaster@domain1.com
    ServerName domain1.com
    ServerAlias www.domain1.com
    DocumentRoot /var/www/domain1.com
    ErrorLog \${APACHE_LOG_DIR}/domain1-error.log
    CustomLog \${APACHE_LOG_DIR}/domain1-access.log combined

EOT
  filename = "vhost1.conf"
}

resource "local_file" "vhost2" {
  content = <
    ServerAdmin webmaster@domain2.com
    ServerName domain2.com
    ServerAlias www.domain2.com
    DocumentRoot /var/www/domain2.com
    ErrorLog \${APACHE_LOG_DIR}/domain2-error.log
    CustomLog \${APACHE_LOG_DIR}/domain2-access.log combined

EOT
  filename = "vhost2.conf"
}

resource "null_resource" "deploy_vhosts" {
  provisioner "remote-exec" {
    inline = [
      "sudo mkdir -p /var/www/domain1.com /var/www/domain2.com",
      "sudo cp vhost1.conf /etc/apache2/sites-available/domain1.conf",
      "sudo cp vhost2.conf /etc/apache2/sites-available/domain2.conf",
      "sudo a2ensite domain1.conf",
      "sudo a2ensite domain2.conf",
      "sudo systemctl reload apache2"
    ]
  }
}

This configuration defines two Apache virtual hosts, one for domain1.com and another for domain2.com, using Terraform to provision the server and copy the virtual host configuration files.

Step 3: Apply the Terraform Configuration

After configuring Terraform, you can now apply the configuration to provision Apache and create the virtual hosts. Start by initializing Terraform in your project directory:

terraform init

Next, apply the configuration:

terraform apply

Terraform will prompt you for confirmation. Type yes to continue. Terraform will install Apache, configure the virtual hosts, and reload the Apache service.

Step 4: Verify the Virtual Host Configuration

Once the Terraform configuration is applied, verify that the virtual hosts are working by visiting the domains in your browser (e.g., http://domain1.com or http://domain2.com).

You can also check the status of the Apache virtual hosts using the following command:

sudo apache2ctl -S