Day 65 - Working with Terraform Resources
Sayali Shewale
DevOps Engineer | AWS cloud Engineer | AWS DevOps | Linux | Docker | Jenkins | Terraform | Kubernetes | Ansible | Grafana
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 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.
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"]
}
}
In this configuration, we first configure the AWS provider with the desired region.
Configure a security group using the aws_security_group resource block that allows incoming traffic on port 80 from any IP address. This ensures that we can access the website from the public internet.
Run terraform init to initialize the Terraform project.
Run terraform apply to create the security group.
Check Security group is created
Go to EC2 service
Inside 'Network & Security', select 'Security Groups'
You can see web-server-sg security group is created using terraform.
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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 python3 -m http.server80 &
EOF
}
///if you use python2 version then use-
nohup python -m SimpleHTTPServer 80 &
Note: Replace the ami and key_name values with your own.
We use the user_data parameter to execute a Bash script that sets up a basic web server using Python's SimpleHTTPServer.
When we launch an EC2 instance using Terraform with this user_data script, it will set up a web server serving the content of index.html on port 80. You can then access the website by navigating to the public IP address of your instance in a web browser.
Run terraform apply to create the EC2 instance.
EC2 instance is created.
Copy public-ip-address of instance that is created using terraform.
Browse public ip address of your instance. You can see webpage.
Thank you for reading!
Senior Cloud Engineer - Nagarro | Google Cloud Certified {"CDI, ACE , PCA, PDE}|Cloud DevOps Specialist | 5x GCP , Azure Certified | Devops | Linux | Docker | Terraform | Jenkins CI/CD | Kubernetes
1 年Well explained ?? ?? Sayali Shewale
DevOps Engineer at BH Mobile Pte Ltd || AWS || Linux || CICD || Jenkins || Git GitHub || Docker || Kubernetes || Terraform ||
1 年Amazing Sayali Shewale