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TERRAFORM_MODULES_CONSOLIDATION.md
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TERRAFORM_MODULES_CONSOLIDATION.md
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# Terraform Modules Consolidation Plan
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**Last Updated**: 2025-01-27
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**Purpose**: Plan for consolidating and standardizing Terraform modules across projects
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---
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## Overview
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Multiple projects contain Terraform modules that can be consolidated into shared, reusable modules. This document identifies consolidation opportunities and provides a plan for implementation.
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---
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## Current Terraform Module Inventory
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### Project: smom-dbis-138
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**Location**: `smom-dbis-138/terraform/modules/`
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**Modules**:
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- `networking` - Virtual networks, subnets, NSGs
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- `kubernetes` - AKS cluster, node pools
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- `storage` - Storage accounts, containers
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- `secrets` - Key Vault
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- `resource-groups` - Resource group management
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- `keyvault-enhanced` - Enhanced Key Vault with RBAC
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- `budget` - Consumption budgets
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- `monitoring` - Monitoring and observability
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- `backup` - Backup configurations
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- `nginx-proxy` - Nginx proxy configuration
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- `networking-vm` - VM networking
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- `application-gateway` - Application Gateway configuration
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**Multi-Cloud Modules**:
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- `modules/azure/` - Azure-specific modules
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- `modules/aws/` - AWS-specific modules
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- `modules/gcp/` - GCP-specific modules
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- `modules/onprem-hci/` - On-premises HCI modules
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- `modules/azure-arc/` - Azure Arc integration
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- `modules/service-mesh/` - Service mesh configuration
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- `modules/observability/` - Observability stack
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### Project: the_order
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**Location**: `the_order/infra/terraform/modules/`
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**Modules**:
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- `regional-landing-zone/` - Regional landing zone
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- `well-architected/` - Well-Architected Framework modules
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### Project: loc_az_hci
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**Location**: `loc_az_hci/terraform/`
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**Modules**:
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- Proxmox integration modules
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- Azure Arc modules
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- Kubernetes modules
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### Project: Sankofa
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**Location**: `Sankofa/cloudflare/terraform/`
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**Modules**:
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- Cloudflare DNS configuration
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- Cloudflare Tunnel configuration
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---
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## Consolidation Opportunities
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### High Priority Modules (Used Across Multiple Projects)
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#### 1. Networking Module
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**Current Locations**:
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- `smom-dbis-138/terraform/modules/networking`
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- Used for: Virtual networks, subnets, NSGs
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**Consolidation**:
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- Create shared module: `infrastructure/terraform/modules/azure/networking`
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- Standardize interface
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- Support multiple projects
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#### 2. Kubernetes Module
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**Current Locations**:
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- `smom-dbis-138/terraform/modules/kubernetes`
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- `loc_az_hci/terraform/` (K3s configuration)
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**Consolidation**:
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- Create shared module: `infrastructure/terraform/modules/azure/kubernetes`
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- Support AKS and K3s
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- Standardize configuration
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#### 3. Key Vault Module
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**Current Locations**:
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- `smom-dbis-138/terraform/modules/keyvault-enhanced`
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- `the_order/infra/terraform/` (if present)
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**Consolidation**:
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- Create shared module: `infrastructure/terraform/modules/azure/keyvault`
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- Enhanced version with RBAC
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- Support both access policies and RBAC
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#### 4. Storage Module
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**Current Locations**:
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- `smom-dbis-138/terraform/modules/storage`
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**Consolidation**:
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- Create shared module: `infrastructure/terraform/modules/azure/storage`
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- Standardize storage account configuration
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- Support multiple storage types
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#### 5. Monitoring Module
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**Current Locations**:
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- `smom-dbis-138/terraform/modules/monitoring`
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- `loc_az_hci/` (monitoring configuration)
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**Consolidation**:
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- Create shared module: `infrastructure/terraform/modules/azure/monitoring`
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- Unified monitoring stack
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- Support Prometheus, Grafana, Application Insights
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---
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## Proposed Shared Module Structure
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```
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infrastructure/
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├── terraform/
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│ ├── modules/
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│ │ ├── azure/
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│ │ │ ├── networking/
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│ │ │ ├── kubernetes/
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│ │ │ ├── storage/
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│ │ │ ├── keyvault/
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│ │ │ ├── monitoring/
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│ │ │ ├── database/
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│ │ │ └── compute/
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│ │ ├── multi-cloud/
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│ │ │ ├── azure/
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│ │ │ ├── aws/
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│ │ │ ├── gcp/
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│ │ │ └── onprem-hci/
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│ │ └── shared/
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│ │ ├── resource-groups/
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│ │ ├── tags/
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│ │ └── naming/
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│ ├── environments/
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│ │ ├── dev/
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│ │ ├── staging/
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│ │ └── prod/
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│ └── README.md
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```
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---
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## Module Standardization
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### Standard Module Structure
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```
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module-name/
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├── main.tf # Main module resources
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├── variables.tf # Input variables
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├── outputs.tf # Output values
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├── versions.tf # Version constraints
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├── README.md # Module documentation
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└── examples/ # Usage examples
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└── basic/
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└── main.tf
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```
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### Standard Variables
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- `environment` - Environment name (dev/staging/prod)
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- `location` - Azure region
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- `project_name` - Project identifier
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- `tags` - Resource tags
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- `resource_group_name` - Resource group name
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### Standard Outputs
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- Resource IDs
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- Resource names
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- Connection strings (when applicable)
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- Configuration values
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---
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## Migration Strategy
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### Phase 1: Identify and Document (Week 1-2)
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- [x] Inventory all Terraform modules ✅
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- [ ] Document module interfaces
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- [ ] Identify common patterns
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- [ ] Document dependencies
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### Phase 2: Create Shared Module Structure (Week 3-4)
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- [ ] Create `infrastructure/terraform/modules/` structure
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- [ ] Create shared module templates
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- [ ] Document module standards
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- [ ] Create module registry
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### Phase 3: Consolidate High-Priority Modules (Week 5-8)
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- [ ] Networking module
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- [ ] Kubernetes module
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- [ ] Key Vault module
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- [ ] Storage module
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- [ ] Monitoring module
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### Phase 4: Migrate Projects (Week 9-12)
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- [ ] Update smom-dbis-138 to use shared modules
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- [ ] Update the_order to use shared modules
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- [ ] Update loc_az_hci to use shared modules
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- [ ] Update Sankofa to use shared modules (if applicable)
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### Phase 5: Documentation and Testing (Week 13-14)
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- [ ] Complete module documentation
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- [ ] Create usage examples
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- [ ] Test module compatibility
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- [ ] Update project documentation
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---
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## Module Registry
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### Azure Modules
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#### networking
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- **Purpose**: Virtual networks, subnets, NSGs, Application Gateway
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- **Used By**: smom-dbis-138, the_order
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- **Status**: To be consolidated
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#### kubernetes
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- **Purpose**: AKS cluster, node pools, networking
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- **Used By**: smom-dbis-138, loc_az_hci
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- **Status**: To be consolidated
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#### keyvault
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- **Purpose**: Azure Key Vault with RBAC
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- **Used By**: smom-dbis-138, the_order
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- **Status**: To be consolidated
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#### storage
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- **Purpose**: Storage accounts, containers, file shares
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- **Used By**: smom-dbis-138
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- **Status**: To be consolidated
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#### monitoring
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- **Purpose**: Log Analytics, Application Insights, monitoring
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- **Used By**: smom-dbis-138, loc_az_hci
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- **Status**: To be consolidated
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### Multi-Cloud Modules
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#### azure
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- **Purpose**: Azure-specific resources
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- **Used By**: smom-dbis-138
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- **Status**: Existing, to be enhanced
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#### aws
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- **Purpose**: AWS-specific resources
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- **Used By**: smom-dbis-138
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- **Status**: Existing
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#### gcp
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- **Purpose**: GCP-specific resources
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- **Used By**: smom-dbis-138
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- **Status**: Existing
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#### onprem-hci
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- **Purpose**: On-premises HCI infrastructure
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- **Used By**: smom-dbis-138
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- **Status**: Existing
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---
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## Best Practices
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### Module Design
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1. **Single Responsibility**: Each module should have one clear purpose
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2. **Composable**: Modules should work together
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3. **Configurable**: Use variables for flexibility
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4. **Documented**: Clear README and examples
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5. **Tested**: Test modules in isolation
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### Versioning
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- Use semantic versioning
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- Tag module releases
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- Document breaking changes
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- Maintain changelog
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### Testing
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- Test modules in isolation
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- Use Terratest for automated testing
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- Validate module outputs
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- Test error scenarios
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---
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## Usage Examples
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### Using Shared Networking Module
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```hcl
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module "networking" {
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source = "../../infrastructure/terraform/modules/azure/networking"
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environment = var.environment
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location = var.location
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project_name = "dbis-core"
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resource_group_name = azurerm_resource_group.main.name
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vnet_address_space = ["10.0.0.0/16"]
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subnets = {
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app = {
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address_prefixes = ["10.0.1.0/24"]
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service_endpoints = ["Microsoft.Storage"]
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}
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db = {
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address_prefixes = ["10.0.2.0/24"]
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service_endpoints = ["Microsoft.Sql"]
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}
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}
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tags = var.tags
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}
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```
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---
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## Next Steps
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1. **Create Infrastructure Directory Structure**
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- Set up `infrastructure/terraform/modules/`
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- Create module templates
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- Document standards
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2. **Prioritize Module Consolidation**
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- Start with networking module
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- Consolidate Kubernetes module
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- Standardize Key Vault module
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3. **Migration Planning**
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- Plan migration for each project
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- Test compatibility
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- Update documentation
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---
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**Last Updated**: 2025-01-27
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**Status**: Planning Phase
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Reference in New Issue
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