How Terraform’s simple graph concepts deploy complex infrastructure as code
summary
Explains the concrete claim that Terraform orders and executes resources by building a directed acyclic graph from HCL, then walking it to produce a plan and apply; shows actual Go source paths from CLI init through config parsing, module expansion and state locking to the graph builder and walker; demonstrates module expansion since 0.13 and the use of transitive reduction to simplify edges; runs plan and apply with trace logs so the example actually executes.
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chapters (35)
- 0:00Introduction
- 2:07What is Terraform
- 3:35Terraform concepts
- 10:41Terraform code tour
- 11:32Terraform configuration file
- 12:32Terraform plan
- 13:42Terraform main
- 14:52Understanding providers
- 15:43Terraform CLI
- 16:55Run
- 18:03Diagnostic package
- 18:43Backend configuration
- 19:09Load backend
- 20:01Build operation
- 20:20Config loader
- 20:43Variable values
- 21:05Run operation
- 21:33Handling the channel
- 21:54Operation
- 22:25Plan
- 23:23State
- 23:57Context
- 24:12Load Configuration
- 24:53Create New Module
- 25:28Load Module
- 26:33Graph Type
- 28:34Module Expansion Transformer
- 30:17Expansion Node
- 30:33Expansion Edge
- 32:08Graph Theory
- 32:44Walk
- 33:50Graph Builder
- 34:57Formatting
- 35:22Debugging
- 38:33Conclusion
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