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Summary

This PR implements comprehensive AWS Spot Placement Scores support, enabling users to make more informed decisions when selecting spot instances based on AWS's proprietary placement reliability scores.

🚀 New Features

  • AWS Spot Placement Scores Integration: Real-time score fetching from AWS EC2 API
  • Score Filtering: --min-score flag to filter instances by reliability threshold
  • Visual Score Display: Color-coded indicators (🟢 high scores, 🔴 low scores)
  • Multi-level Granularity: Support for both regional and AZ-level scores via --az flag
  • Score-based Sorting: --sort score option for reliability-based ranking
  • Configurable Timeouts: --score-timeout for API response control
  • MCP Server Support: Score features available through Model Context Protocol

🎯 Key Benefits

  • Improved Reliability: Select spot instances with higher placement success rates
  • Cost Optimization: Balance cost savings with interruption risk using scores
  • Regional Intelligence: Understand spot capacity patterns across AWS regions
  • Visual Clarity: Immediate visual feedback on instance reliability

📊 CLI Examples

# Filter by high-reliability instances (score ≥ 8)
./spotinfo --region us-east-1 --with-score --min-score 8

# Get AZ-level scores for better placement decisions  
./spotinfo --region us-west-2 --with-score --az --type "m5.*"

# Sort by placement scores for optimal selection
./spotinfo --with-score --sort score --order desc

🔧 Technical Implementation

  • Core Logic: internal/spot/score.go - AWS API integration with error handling
  • Client Integration: Enhanced spot client with score enrichment capabilities
  • CLI Interface: New command-line flags with intuitive score visualization
  • MCP Support: Score parameters available in Model Context Protocol tools
  • Comprehensive Testing: Full test coverage including mocks and edge cases

📚 Documentation

  • Detailed Guide: docs/aws-spot-placement-scores.md - Complete API documentation
  • Usage Examples: docs/usage.md and docs/examples.md - Practical scenarios
  • MCP Integration: docs/mcp-server.md - Protocol-specific documentation

⚠️ Known Limitations

  • Requires ec2:GetSpotPlacementScores IAM permission
  • Some legacy instance types (p2.*) not supported by AWS score API
  • Regional access may vary based on service control policies
  • Score enrichment adds 10-30s to query time depending on timeout settings

🧪 Test Coverage

  • Manual testing across multiple AWS regions (us-east-1, us-west-2, eu-west-1)
  • Comprehensive unit tests for all score-related functionality
  • Edge case handling for API failures and permission issues
  • Integration testing with various instance types and filtering scenarios

Test Plan

  • Core score API integration and error handling
  • CLI flag functionality and parameter validation
  • Score filtering and sorting across instance types
  • Regional and AZ-level score fetching
  • MCP server integration and tool updates
  • Documentation accuracy and completeness
  • Cross-platform compatibility and dependency management

- Add score.go with AWS EC2 spot placement score integration
- Extend types.go with score-related data structures
- Add comprehensive types_test.go with score functionality tests
- Implements region and AZ-level score fetching with timeout handling
- Update client.go with score enrichment capability
- Add comprehensive client_test.go coverage for score features
- Regenerate mocks_test.go for new scoring interfaces
- Enables score filtering, sorting, and regional/AZ-level fetching
- Add --with-score, --min-score, --az, --score-timeout flags
- Implement color-coded score display (🟢/🔴 indicators)
- Add score sorting and filtering in CLI interface
- Update tests for new scoring command-line functionality
- Update MCP tools to support score parameters and filtering
- Add score enrichment to MCP tool responses
- Refactor and streamline MCP test coverage
- Enable score features in Model Context Protocol interface
- Add aws-spot-placement-scores.md with detailed API documentation
- Update usage.md with score filtering examples and CLI options
- Extend examples.md with score-based use cases and scenarios
- Update mcp-server.md with score parameter documentation
- Enhance data-sources.md and api-reference.md for score features
- Update go.mod/go.sum with AWS SDK dependencies for score API
- Enhance .golangci.yaml with additional linting rules
- Update .mockery.yaml for new scoring interfaces
- Ensure compatibility with score enrichment dependencies
- Add score feature overview and benefits section
- Include score CLI examples and usage scenarios
- Document score filtering, sorting, and visualization features
- Streamline README structure with focus on core functionality
@alexei-led alexei-led merged commit 05e9331 into master Jul 28, 2025
3 checks passed
@alexei-led alexei-led deleted the feat/spot/score branch July 28, 2025 18:42
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2 participants