Terraform Graph

Step-01: Introduction

• The terraform graph command is used to generate a visual representation of either a configuration or execution plan
• The output is in the DOT format, which can be used by GraphViz to generate charts.

Step-02: Run Terraform Graph command

# Terraform Initialize
terraform init

# Terraform Graph
terraform graph > dot1
Observation: 
This command will output DOT format text and store in file dot1

Step-03: Online Graphviz Viewers

• Graphviz-Online
• Edotor-Online
• Copy and paste the text from dot1 file generated in step-02 in these online Graphviz Viewers
• Review the output

Step-04: Clean-Up

# Delete .terraform files
rm -rf .terraform*

Step-05: Other Options - Offline Graphviz Installer

Step-05-01: Pre-requisite notes

• Graphviz is unstable on MacOS
• Graphviz needs xcode to be installed on MacOS which consumes huge disk space.
• With that said, we are going to do this demo on Windows Machine
• We are going to use Windows 2019 EC2 instance created on AWS for the same.

Step-05-02: Create Windows 2019 VM ready

• Create Windows 2019 VM on AWS Cloud
• Disable Browser security settings in Server-Manager
• Install Google Chrome
• Download & Install Terraform CLI
• Set Path for Terraform CLI
• Copy terraform-manifests folder from section-14: Terraform Graph of the course to Windows VM

Step-05-03: Install Graphviz on Windows VM

• Download Graphviz
• Install Graphviz

# Switch Directory
cd c:\graphviz-demo\terraform-manifests

# Terraform Initialize
terraform init

# Terraform Graph
terraform graph > dot1
Observation: 
This command will output DOT format text

# Terraform Graph in Image format
terraform graph | dot -Tsvg > graph.svg

# Verify
open graph.svg in browser

References

• Terraform Graph