Yesterday, we saw how to create a Terraform script with Blocks and Resources. Today, we will dive deeper into 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 behaviors, 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.
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"]
}
}
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Run terraform init to initialize the Terraform project.
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Run terraform apply to create the security group.
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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 apply to create the EC2 instance.
- Now that your EC2 instance is up and running, you can access the website you just hosted on it. Follow these steps:
Happy Terraforming!