Working with Terraform Resources 🚀
This is Day 65 of #90daysofdevops challenge
Yesterday, we saw how to create a Terraform script with Blocks and Resources. Today, we will dive deeper into Terraform resources.
Understanding Terraform Resources
A resource in Terraform represents a component of your infrastructure, such as a physical server, a virtual machine, a DNS record, or an S3 bucket. Resources have attributes that define their properties and behaviours, such as the size and location of a virtual machine or the domain name of a DNS record.
When you define a resource in Terraform, you specify the type of resource, a unique name for the resource, and the attributes that define the resource. Terraform uses the resource block to define resources in your Terraform configuration.
Task 1: Create a security group
To allow traffic to the EC2 instance, you need to create a security group. Follow these steps:
In your main.tf file, add the following code to create a security group:
resource "aws_security_group" "web_server" {
name_prefix = "web-server-sg"
ingress {
from_port = 80
to_port = 80
protocol = "tcp"
cidr_blocks = ["0.0.0.0/0"]
}
}
- Run
terraform initto initialize the Terraform project.
- Run
terraform applyto create the security group.
- After successfully applying, verify the console for the created security group by Terraform.
Task 2: Create an EC2 instance
Now you can create an EC2 instance with Terraform. Follow these steps:
In your main.tf file, add the following code to create an EC2 instance:
resource "aws_instance" "web_server" {
ami = "ami-0557a15b87f6559cf"
instance_type = "t2.micro"
key_name = "my-key-pair"
security_groups = [
aws_security_group.web_server.name
]
user_data = <<-EOF
#!/bin/bash
echo "<html><body><h1>Welcome to my website!</h1></body></html>" > index.html
nohup python -m SimpleHTTPServer 80 &
EOF
}
Note: Replace the ami and key_name values with your own. You can find a list of available AMIs in the AWS documentation.
- Run
terraform initto initialize the Terraform project.
- Run
terraform planto view the plan of Terraform.
- Now, Run
terraform applyto create the EC2 instance.
- After successfully applying, verify the console for the created ec2 instance by Terraform.
Task 3: Access your website
Now that your EC2 instance is up and running, you can access the website you just hosted on it. Follow these steps:
- Open a web browser and enter the EC2 instance’s public IP address.
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