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SUMMARY

This PR adds comprehensive documentation for the MCP service in response to review feedback on PR #35163. The documentation addresses all questions raised about the Flask singleton pattern, multitenant architecture, security model, and production deployment path.

Addresses review feedback from PR #35163:

  • Flask singleton pattern explanation and justification
  • Multitenant architecture with tenant isolation strategies
  • Authentication and authorization model (dev and production)
  • Security considerations and best practices
  • Production deployment guide with multiple deployment options
  • Migration path from development to production

Documentation Added:

  1. ARCHITECTURE.md (669 lines)

    • Flask singleton pattern explanation and justification
    • Why module-level singleton is appropriate for MCP service
    • Thread safety implementation details
    • Multitenant architecture (shared process with tenant isolation)
    • Tenant isolation mechanisms (database, application, JWT)
    • Process models (single, multi-process, containerized)
    • Database connection management
    • Deployment considerations
  2. SECURITY.md (744 lines)

    • Authentication (dev: MCP_DEV_USERNAME, prod: JWT)
    • JWT provider examples (Auth0, Okta, AWS Cognito, Keycloak)
    • Authorization (RBAC, RLS, tool permissions)
    • Session and CSRF handling
    • Audit logging strategies
    • Compliance considerations (GDPR, SOC2, HIPAA)
    • Security checklist
    • Incident response procedures
  3. PRODUCTION.md (1,257 lines)

    • Current status (what's ready vs dev-only)
    • Required for production checklist
    • Deployment guides (systemd, supervisord, Docker, Kubernetes)
    • Reverse proxy configuration (Nginx, Apache)
    • Monitoring and alerting (Prometheus, Grafana, CloudWatch)
    • Migration path from dev to prod
    • Troubleshooting common issues
    • Performance tuning recommendations
  4. UPDATING.md

    • Added comprehensive MCP service documentation in main project changelog
    • Configuration options (dev vs prod)
    • Running instructions
    • Security requirements
    • Links to all new documentation files

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

N/A - Documentation only

TESTING INSTRUCTIONS

Review the documentation files:

  • superset/mcp_service/ARCHITECTURE.md
  • superset/mcp_service/SECURITY.md
  • superset/mcp_service/PRODUCTION.md
  • UPDATING.md (MCP service section in "Next" release)

All documentation:

  • Uses concrete code examples from the actual implementation
  • References existing Superset patterns (RBAC, RLS, DAOs)
  • Provides deployment-ready configurations
  • Includes troubleshooting guidance
  • Links to related files and documentation

ADDITIONAL INFORMATION

…yment documentation

Add comprehensive documentation addressing PR apache#35163 review feedback:

- ARCHITECTURE.md: Explains Flask singleton pattern, multitenant architecture
  with tenant isolation via RBAC/RLS, process models, database connection
  management, and deployment considerations (669 lines)

- SECURITY.md: Documents authentication (dev and production JWT), authorization
  (RBAC, RLS, tool permissions), session/CSRF handling, audit logging,
  compliance considerations, security checklist, and incident response (744 lines)

- PRODUCTION.md: Production deployment guide with current status, requirements
  checklist, deployment configurations (systemd, supervisord, Docker, Kubernetes),
  reverse proxy setup, monitoring/alerting, migration path, troubleshooting,
  and performance tuning (1,257 lines)

- UPDATING.md: Added MCP service documentation in main project changelog

These files provide complete guidance for deployers and future maintainers on
architecture decisions, security implementation, and production deployment paths.

Addresses all feedback from PR apache#35163 review.
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@dosubot dosubot bot added the doc Namespace | Anything related to documentation label Nov 6, 2025
Replace all ASCII art diagrams with professional Mermaid diagrams for
better rendering and maintainability:

ARCHITECTURE.md:
- Request Flow: Sequence diagram showing MCP client to database flow
- Multi-Instance Deployment: Graph showing load balancer and MCP instances
- Tenant Isolation: Graph showing RBAC and RLS enforcement
- Current Implementation: Graph showing tenant isolation mechanisms

SECURITY.md:
- Refresh Token Pattern: Sequence diagram for token lifecycle
- Row-Level Security: Sequence diagram showing RLS enforcement flow
- CSRF Token Flow: Sequence diagram with conditional validation

PRODUCTION.md:
- Production Deployment Overview: Comprehensive architecture diagram
  showing all tiers (External, DMZ, Application, Data, Monitoring)

Mermaid diagrams provide:
- Better visual clarity and professionalism
- Automatic rendering on GitHub and documentation sites
- Easier maintenance and modification
- Consistent styling across all diagrams
@github-actions github-actions bot removed the doc Namespace | Anything related to documentation label Nov 6, 2025
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codecov bot commented Nov 6, 2025

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 68.74%. Comparing base (1f960d5) to head (4011e0a).

Additional details and impacted files
@@             Coverage Diff             @@
##           master   #36017       +/-   ##
===========================================
+ Coverage        0   68.74%   +68.74%     
===========================================
  Files           0      622      +622     
  Lines           0    45718    +45718     
  Branches        0     4975     +4975     
===========================================
+ Hits            0    31428    +31428     
- Misses          0    13045    +13045     
- Partials        0     1245     +1245     
Flag Coverage Δ
hive 44.20% <ø> (?)
mysql 67.82% <ø> (?)
postgres 67.87% <ø> (?)
presto 47.76% <ø> (?)
python 68.71% <ø> (?)
sqlite 67.48% <ø> (?)
unit 100.00% <ø> (?)

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Add required Apache Software Foundation license headers in HTML
comment format to all new markdown documentation files:

- ARCHITECTURE.md
- SECURITY.md
- PRODUCTION.md

Per Apache project requirements, all files must include the ASF
license header. Markdown files use HTML comment format for the
license header.
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