refactor: complete Phase 2c variables template integration

- Add VariablesTemplate rendering to TofuTemplateRenderer workflow
- Integrate dynamic variables.tfvars generation with instance_name parameter
- Add hardcoded 'torrust-vm' instance names to provision and container modules
- Update project documentation to mark Phase 2c as completed
- All validation passed: linters, unit tests, and e2e deployment workflow

Author: josecelano

docs/refactors/instance-name-parameterization.md

@@ -16,13 +16,14 @@ This refactor aims to eliminate hardcoded "torrust-vm" instance names throughout
 - **Phase 2**: Template Parameterization
   - ✅ Step 2a: Converted variables.tfvars to Tera template with `{{instance_name}}` placeholder
   - ✅ Step 2b: Created template wrapper infrastructure (`VariablesTemplate`, `VariablesContext`)
+  - ✅ Step 2c: Integrated Variables Template Rendering into workflow
 
 ### 🔄 Current Phase
 
-- **Phase 2c**: Integrate Variables Template Rendering (In Progress)
-  - 🔄 Add `VariablesTemplate` rendering to `RenderOpenTofuTemplatesStep`
+- **Phase 3**: Context Integration - Add instance_name to workflow context (Next Priority)
+  - 🔄 Add `instance_name` field to `TofuContext` struct
   - 🔄 Pass `instance_name` context from provision workflow
-  - 🔄 Replace static `variables.tfvars` with dynamic rendering
+  - 🔄 Replace hardcoded "torrust-vm" values with dynamic context
 
 ### 📋 Remaining Phases
 
@@ -82,13 +83,18 @@ This refactor aims to eliminate hardcoded "torrust-vm" instance names throughout
 
 **Goal**: Add variables template rendering to infrastructure workflow
 
-#### Step 2c: Add variables rendering to workflow
-
-- 🔄 Add `VariablesTemplate` rendering to `RenderOpenTofuTemplatesStep`
-- 🔄 Pass `instance_name` context from provision workflow
-- 🔄 Replace static `variables.tfvars` with dynamic rendering
-- **Status**: Template wrapper ready, needs integration into workflow
-- **Validation**: E2E tests should show dynamic instance naming
+#### Step 2c: Integrate Variables Template Rendering into workflow ✅
+
+- ✅ Added `VariablesTemplate` imports to `TofuTemplateRenderer`
+- ✅ Added `instance_name` field to `TofuTemplateRenderer` struct
+- ✅ Updated `TofuTemplateRenderer::new()` to accept `instance_name` parameter
+- ✅ Created `render_variables_template()` method for dynamic rendering
+- ✅ Updated `render_tera_templates()` to call variables template rendering
+- ✅ Removed `variables.tfvars` from static template files list
+- ✅ Added hardcoded "torrust-vm" values for backward compatibility
+- ✅ Updated all test constructors to include `instance_name` parameter
+- **Status**: Variables template now dynamically renders with `instance_name = "torrust-vm"`
+- **Validation**: ✅ All linters + unit tests + e2e tests passed
 
 ### Phase 3: Context Integration
 

project-words.txt

@@ -60,3 +60,4 @@ usermod
 значение
 ключ
 конфиг
+файл

src/commands/provision.rs

@@ -196,6 +196,7 @@ mod tests {
             template_manager.clone(),
             temp_dir.path(),
             ssh_credentials.clone(),
+            "torrust-vm".to_string(), // TODO: Make this configurable in Phase 3
         ));
 
         let ansible_renderer = Arc::new(AnsibleTemplateRenderer::new(

src/container.rs

@@ -56,6 +56,7 @@ impl Services {
             template_manager.clone(),
             config.build_dir.clone(),
             config.ssh_credentials.clone(),
+            "torrust-vm".to_string(), // TODO: Make this configurable in Phase 3
         );
 
         // Create configuration template renderer