CloudStack Quota API Implementation

Summary

This PR implements comprehensive support for CloudStack Quota APIs in the Terraform CloudStack provider, enabling users to manage quota tariffs and monitor quota usage through Terraform.

Features Added

Data Sources

• cloudstack_quota - Retrieve quota summary for accounts/domains
• cloudstack_quota_enabled - Check if quota plugin is enabled
• cloudstack_quota_tariff - Query existing quota tariffs with filtering

Resources

• cloudstack_quota_tariff - Full CRUD operations for quota tariff management
  • Create/Update/Delete tariffs
  • Activation rules support
  • Import existing tariffs
  • Schema validation

Technical Implementation

Core Components

• Complete CRUD operations using CloudStack Go client v2.18.1
• Robust error handling and validation
• Lifecycle management with ForceNew attributes
• Import functionality for existing resources

Schema Features

• Usage Types: Support for all CloudStack usage types (1-25)
• Activation Rules: Complex pricing rules based on service offerings
• Validation: Input validation for negative values and invalid types
• Lifecycle: Proper resource recreation when needed

Testing Coverage

Acceptance Tests (11 total)

• Data Sources: Basic and filtered queries for all data sources
• Resource CRUD: Create, Read, Update, Delete, Import operations
• Validation: Invalid input handling and error scenarios
• Activation Rules: Simple and complex pricing rules

Manual Testing Scenarios

• ✅ Real CloudStack integration verified
• ✅ All CRUD operations tested
• ✅ Complex activation rules validated
• ✅ Import/export functionality confirmed
• ✅ Edge cases and error handling tested

Documentation

Website Documentation

• Complete markdown documentation for all resources and data sources
• Usage examples and configuration options
• Import instructions and best practices

Examples

• 11 example configurations covering:
  • Basic tariff creation
  • Multiple tariffs management
  • Complex activation rules
  • Lifecycle management
  • Import scenarios
  • Validation examples

Code Quality

Standards Compliance

• Follows Terraform provider patterns
• Consistent with existing CloudStack provider code
• Proper Go formatting and conventions
• Comprehensive error handling

Dependencies

• Uses existing CloudStack Go client
• No new external dependencies
• Compatible with current provider architecture

Use Cases

This implementation enables:

1. Cost Management: Define pricing for CloudStack resources
2. Billing Automation: Automated tariff management through Terraform
3. Multi-tenant Pricing: Different pricing rules per service offering
4. Quota Monitoring: Track quota usage across accounts/domains

Breaking Changes

None - This is a new feature addition with no impact on existing functionality.

Checklist

• All tests pass
• Documentation complete
• Examples provided
• Real CloudStack integration tested
• Import functionality working
• Schema validation implemented
• Error handling robust

Related APIs

Implements CloudStack APIs:

• quotaSummary
• quotaIsEnabled
• quotaTariffList
• quotaTariffCreate
• quotaTariffUpdate
• quotaTariffDelete

How to Test

# Run acceptance tests
TF_ACC=1 go test -v ./cloudstack -run "TestAccCloudStackQuota"

# Test specific resource
TF_ACC=1 go test -v ./cloudstack -run "TestAccCloudStackQuotaTariff"