Terraform AWS Individual Modules

These terraform modules provide basic infrastructure in AWS environment.

---

VPC (Virtual Private Cloud)

"VPC enables you to launch AWS resources into a virtual network"

VPC

• Creation of VPC
• Enable DNS hostnames
• Enable DNS support

Subnet

• Creation of public and private subnets
• Creation of public and private subnet route table
• Assocation of subnets to route tables

Internet Gateway

• Creation of internet gateway
• Association of internet gateway with vpc

NAT Gateway

• Creation of Elastic IPs
• Creation of NAT gateways
• Allocation of Elastic IPs to NAT Gateways
• Association of NAT Gateways with public subnets

Security Groups

• Creation of security groups
• Creation of security group rules with CIDR block as input
• Creation of security group rules with security group IDs as input
• Association of security group rules with security groups

---

EC2 (Elastic Cloud Compute)

"EC2 provides scalable computing capacity in the Amazon Web Services (AWS) cloud"

Instances

• Creation of Instances
• Specification of root volume details
• Attachment of additional volume to instance
• Associating VPC and subnet in which instance need to be created
• Adding user data file to execute at initial launch of instance/server
• Associationg key file to access server via SSH
• Associating security group in which this instance need to be under

Amazon Cerificate Manager

• Importing of certificates from local to ACM

Elastic Load Balancers

• Creation of Elastic Load Balancer
• Assigning of multiple subnets to ELB
• Assigning of security groups
• Associating instances for load balancing
• Configuration of listener ports and protocols
• Assigning health check parameters

Network Load Balancers

• Specification of Load Balancer type
• Specification of Load Balancer usage
• Creation of Load Balancer
• Assigning of multiple subnets to NLB
• Assigning of multiple security groups to ALB

Target Groups

• Creation of Target Group
• Specify the target type, instance ID or ip
• Specify the port on which targets receive traffic, Required when target_type is instance or ip
• Specify the protocol to use for routing traffic to the targets, Required when target_type is instance or ip
• Associating VPC
• Configuring health check parameters

Load Balancer Listeners

• Creation of Load Balancer Listener with port 80 and and forwarding to a Target Group
• Creation of Load Balancer Listener with port 443, asssociatig a SSL certificate from AMC and forwarding to a Target Group
• Association of created Listerners to Load Balancers

Launch Configurations

• Creation of a Launch Configuration template
• Specify the AMI ID
• Specify instance type
• Adding user data file to execute at initial launch of instance/server
• Associating key file to access server via SSH
• Associating security group in which this instances need to be under

Autoscaling Groups

• Creation of Autoscaling Group
• Association of launch configuration template
• Specify desired capacity of servers need to be available
• Association of availability zones or association of subnets to specify availability zones
• Specify maximum size of scaling capacity
• Specify minimum size of scaling capacity
• Association of load balancer with autoscaling group (only in Classic load balancer [ELB])
• Association of load balancer with Target Groups (only in Classic load balancer [NLB/ALB])

NOTE: Using the resource tags functionality we can audit, track and manage resources.

The outputs displayed after Terraform Apply can be exported to a .json format by using command:

terraform output -json > output_values.json

Or to a text file in standard format using command:

terraform output > output_values.txt

Authors

Originally created and maintained by RUDRA LAKSHMI PHANINDRA