# karthik2390/gke architecture

> Architecture diagram of the GitHub repository karthik2390/gke, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-08-14). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/karthik2390/gke
- Repository: https://github.com/karthik2390/gke

## Overview

#### Purpose and entry point
This is a Terraform root module. Its architecture is defined by the top-level Terraform configuration, with `main.tf` as the likely resource/module composition entry point and `terraform.tfvars` supplying environment-specific input values.

#### Root orchestration
`main.tf` is the primary control plane: it should declare the infrastructure resources, data sources, or child-module calls that form the deployed system. Terraform evaluates this dependency graph during `terraform plan` and applies it during `terraform apply`.

Paths: `main.tf`, `tfplan`

#### Provider boundary
`providers.tf` configures Terraform providers and therefore establishes the external infrastructure API boundary. Provider declarations, credentials, regions, subscriptions, or project context here determine where resources declared in `main.tf` are created.

Path: `providers.tf`

#### Input contract
`variables.tf` defines the module’s public input schema: names, identifiers, locations, sizing, feature flags, and sensitive values expected from callers or local variable files. This is the stable configuration boundary between reusable infrastructure logic and deployment-specific settings.

Paths: `variables.tf`, `terraform.tfvars`

#### Environment values and secrets
`terraform.tfvars` binds concrete values to declared variables for a specific execution context. It should be treated as deployment input rather than architecture logic; values may include account identifiers or credentials and should be handled according to Terraform secret-management practices.

Path: `terraform.tfvars`

#### Planning and state workflow
The expected execution flow is:
1. Terraform loads provider definitions, variables, and values.
2. `main.tf` produces a resource dependency graph.
3. A plan is generated and may be persisted as `tfplan`.
4. Applying the plan invokes configured provider APIs to reconcile real infrastructure.

Paths: `main.tf`, `providers.tf`, `tfplan`

#### Material runtime and infrastructure
Terraform CLI is the runtime and configured providers are the infrastructure integration mechanism. No application runtime, service topology, remote backend, or external service can be identified from the supplied file tree alone; those details would need to be confirmed from the contents of `main.tf` and `providers.tf`.

Main entry points: [`variables.tf`](https://github.com/karthik2390/gke/blob/main/variables.tf) (Input schema), [`terraform.tfvars`](https://github.com/karthik2390/gke/blob/main/terraform.tfvars) (Environment values), [`providers.tf`](https://github.com/karthik2390/gke/blob/main/providers.tf) (Provider configuration), [`main.tf`](https://github.com/karthik2390/gke/blob/main/main.tf) (Resource composition)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_module["Terraform root module"]
  node_tfvars["Environment values<br/>tfvars<br/>[terraform.tfvars]"]
  node_variables["Input schema<br/>variables<br/>[variables.tf]"]
  node_providers["Provider configuration<br/>providers<br/>[providers.tf]"]
  node_main["Resource composition<br/>Terraform configuration<br/>[main.tf]"]
end

subgraph group_execution["Terraform workflow"]
  node_cli{{"Terraform CLI<br/>runtime"}}
  node_dependency_graph["Resource dependency graph<br/>plan model"]
  node_tfplan["Saved plan<br/>plan artifact"]
end

node_provider_apis{{"Provider APIs<br/>external infrastructure"}}
node_managed_infra["Managed infrastructure<br/>deployed resources"]

node_tfvars -->|"assigns values"| node_variables
node_variables -->|"defines inputs"| node_main
node_tfvars -->|"loaded by"| node_cli
node_variables -->|"loaded by"| node_cli
node_providers -->|"loaded by"| node_cli
node_main -->|"evaluated by"| node_cli
node_cli -->|"creates plan graph"| node_dependency_graph
node_dependency_graph -.->|"may persist as"| node_tfplan
node_cli -->|"apply invokes"| node_provider_apis
node_provider_apis -->|"reconciles"| node_managed_infra
node_providers -->|"configures access to"| node_provider_apis

click node_tfvars "https://github.com/karthik2390/gke/blob/main/terraform.tfvars"
click node_variables "https://github.com/karthik2390/gke/blob/main/variables.tf"
click node_providers "https://github.com/karthik2390/gke/blob/main/providers.tf"
click node_main "https://github.com/karthik2390/gke/blob/main/main.tf"
click node_tfplan "https://github.com/karthik2390/gke/blob/main/tfplan"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_tfvars,node_variables,node_providers,node_main toneBlue
class node_cli,node_dependency_graph,node_tfplan toneAmber
class node_provider_apis,node_managed_infra toneNeutral
```

## Components

### Terraform root module

- [Environment values](https://github.com/karthik2390/gke/blob/main/terraform.tfvars): tfvars · Concrete deployment-specific variable values. · `terraform.tfvars`
- [Input schema](https://github.com/karthik2390/gke/blob/main/variables.tf): variables · Public module variable contract. · `variables.tf`
- [Provider configuration](https://github.com/karthik2390/gke/blob/main/providers.tf): providers · External infrastructure API boundary and context. · `providers.tf`
- [Resource composition](https://github.com/karthik2390/gke/blob/main/main.tf): Terraform configuration · Declares resources, data sources, and child modules. · `main.tf`

### Terraform workflow

- **Terraform CLI**: runtime · Loads configuration, plans, and applies changes.
- **Resource dependency graph**: plan model · Resolved infrastructure dependency graph.
- [Saved plan](https://github.com/karthik2390/gke/blob/main/tfplan): plan artifact · Optional persisted execution plan. · `tfplan`

### Other components

- **Provider APIs**: external infrastructure · Configured provider control-plane APIs.
- **Managed infrastructure**: deployed resources · Resources reconciled by configured providers.

## Connections

- Environment values → Input schema: assigns values
- Input schema → Resource composition: defines inputs
- Environment values → Terraform CLI: loaded by
- Input schema → Terraform CLI: loaded by
- Provider configuration → Terraform CLI: loaded by
- Resource composition → Terraform CLI: evaluated by
- Terraform CLI → Resource dependency graph: creates plan graph
- Resource dependency graph → Saved plan: may persist as
- Terraform CLI → Provider APIs: apply invokes
- Provider APIs → Managed infrastructure: reconciles
- Provider configuration → Provider APIs: configures access to