Step-01: Introduction
- Understand about Output Values and implement them
- Query outputs using
terraform output
- Understand about redacting secure attributes in output values
- Generate machine-readable output
Step-02: Basics of Output Values
- Reference Sub folder: terraform-manifests
- Understand Output Values
- You can export both Argument & Attribute References
- Terraform AWS EC2 Instance
# Initialize Terraform
terraform init
# Validate Terraform configuration files
terraform validate
# Format Terraform configuration files
terraform fmt
# Review the terraform plan
terraform plan
# Create Resources
terraform apply -auto-approve
# Access Application
http://<Public-IP>
http://<Public-DNS>
- Terraform will load the project state in state file, so that using
terraform output command we can query the state file.
# Terraform Output Commands
terraform output
terraform output ec2_publicdns
Step-04: Output Values - Suppressing Sensitive Values in Output
- We can redact the sensitive outputs using
sensitve = true in output block
- This will only redact the cli output for terraform plan and apply
- When you query using
terraform output, you will be able to fetch exact values from terraform.tfstate files
- Add
sensitve = true for output ec2_publicdns
# Attribute Reference - Create Public DNS URL with http:// appended
output "ec2_publicdns" {
description = "Public DNS URL of an EC2 Instance"
value = "http://${aws_instance.my-ec2-vm.public_dns}"
sensitive = true
}
# Terraform Apply
terraform apply -auto-approve
Observation: You should see the value as sensitive
# Query using terraform output
terraform output ec2_publicdns
Observation: You should get non-redacted original value from terraform.tfstate file
Step-05: Generate machine-readable output
# Generate machine-readable output
terraform output -json
Step-06: Destroy Resources
# Destroy Resources
terraform destroy -auto-approve
# Clean-Up
rm -rf .terraform*
rm -rf terraform.tfstate*
References