terraform-dependency-analyzerlisted

# Terraform Dependency Analyzer This skill helps analyze and optimize resource dependencies in Terraform configurations. ## When to Use Use this skill when: - Understanding resource relationships and dependencies - Troubleshooting circular dependency errors - Optimizing resource creation order - Refactoring complex configurations - Documenting infrastructure dependencies ## Dependency Types ### Implicit Dependencies Terraform automatically detects dependencies through resource attribute references: - Most common and preferred method - Created when one resource references another's attributes - Example: `subnet_id = aws_subnet.main.id` ### Explicit Dependencies Use `depends_on` only when implicit dependencies aren't sufficient: - Cross-resource timing requirements - Dependencies not expressed through attributes - Ensuring proper creation/deletion order - Should be used sparingly ## Analysis Workflow ### 1. Generate Dependency Graph ```bash # Create visual dependency graph terraform graph | dot -Tpng > graph.png # View as text terraform graph ``` ### 2. Identify Resource Relationships Parse configuration to map dependencies: - Read through resource definitions - Note attribute references between resources - Identify explicit `depends_on` declarations - Map out dependency chains ### 3. Check for Circular Dependencies **Common causes:** - Security groups with mutual ingress rules - Resources referencing each other's attributes - Module outputs creating circular re