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3tier-app-aws's Introduction

3tier-app-aws

3 tier application in aws through terraform

This is an implementation of the classic three tier architecture for application hosting.
Three modules that constructs our architecture:

  • [app] --> Backend Application server
  • [web] --> web Application server
  • [db] --> RDS server

How to deploy

Setup:

Main terraform module inputs

Name Description Type Default Required
infra_name Naming conventions for infra string - yes
aws_region AWS region where you have to put your infra string - yes
ec2_amis AMI used for creating ec2 instances string - yes
vpc_cidr The cidr range for vpc string - yes
db_subnets_cidr The cidr range for db string - yes
private_subnet_cidr The cidr range for private subnet string - yes
public_subnet_cidr The cidr range for public subnet string - yes
key_name Unique name for the keypair string - yes
path Path to a directory where key will be stored. string - yes
aws_creds_path path of aws creds string - yes
rds_storage RDS storage space string - yes
rds_engine RDS engine type string - yes
rds_instance_class RDS instance class string - yes
rds_name Name of the RDS string - yes
rds_username Username of the RDS string - yes
rds_password Password of the RDS string - yes
db_port The port on which the DB accepts connections string - yes

Outputs

Name Description
app_elb_url backend app server loadbalancer url
Domain_Url Domain url for web application
rds_endpoint RDS endpoint

Command Line Examples

To setup provisioner

$ terraform init

plan the launch the 3tier-app-aws:

$ terraform plan -out=aws.tfplan

or with custom variable in tf.vars file

$ terraform plan -out=aws.tfplan -var-file=tf.vars

apply the launch the 3tier-app-aws:

$ terraform apply aws.tfplan

To teardown the 3tier-app-aws:

$ terraform destroy

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