Ntier in AWS Contd

• So far we have created vpc with 6 subnets and attached internet gateway
• Now lets create two route tables public and private
• Terraform has locals where we can define the value for usage within template Refer Here

Create Route tables

• Refer Here for the changeset to add route tables and Refer Here for route table resource reference
  
• Now we need to associate private route table with 4 subnets and public route table with 2 subnets. Refer Here for the changes done

Creating RDS DB Instance (db)

• Manual Steps:
  • DB Subnet Group: This is more than one subnet where the databse has to be created
  • Security Group:
    • mysql: open 3306 port with in vpc
  • Database Engine: mysql
  • size: db.t2.micro
  • credentials: username and password
• Create security Group: Refer Here for changes
• Add db subnet group Refer Here for changes
• Create rds instance. Refer Here for the changes done
  
• Lets add database endpoint as output Refer Here
  

AWS EC2 from terraform

• Create an ec2 instance in web1 subnet
• Steps:
  • Create security group Refer Here
• Create ec2 Refer Here for changes

Activity

• Create a new folder and one tf file with local provider to create a text file anywhere in your system
• When you apply you get state file
  • copy the state file and store with name state_1.tfstate
• Now change the path to new directory and apply the changes
  • copy the state file and store with name state_2.tfstate
• Try adding a output in tf
  • copy the state file and store with name state_3.tfstate