Multi-cloud deployment docs

[UJ2202]

User Story

As a DevOps engineer, I want comprehensive multi-cloud deployment documentation so that I can successfully deploy CMBCluster on GCP, AWS, or migrate between cloud providers.

Description

Create complete deployment documentation that covers both GCP and AWS deployments, including setup procedures, configuration options, troubleshooting guides, and migration paths between cloud providers.

Current Documentation Analysis

Based on existing documentation:

• Main README: Comprehensive GCP deployment instructions
• Deployment Scripts: Well-documented GCP setup procedures
• Configuration: Detailed environment variable documentation
• Missing: AWS-specific deployment documentation

Documentation Requirements

1. Multi-Cloud Overview

   • Cloud provider comparison (features, costs, regions)
   • Selection criteria and decision matrix
   • Architecture diagrams for each cloud provider
   • Feature parity matrix between GCP and AWS

2. AWS Deployment Guide

   • Prerequisites and account setup
   • IAM roles and permissions configuration
   • EKS cluster deployment procedures
   • S3 storage configuration
   • ECR registry setup
   • Troubleshooting AWS-specific issues

3. GCP Deployment Guide (Updated)

   • Updated procedures reflecting multi-cloud architecture
   • Clarifications based on user feedback
   • Integration with new abstraction layer
   • Updated troubleshooting section

4. Migration Procedures

   • GCP to AWS migration guide
   • AWS to GCP migration guide
   • Data migration strategies
   • Rollback procedures

Content Structure

docs/
├── deployment/
│   ├── overview.md              # Multi-cloud overview
│   ├── gcp/
│   │   ├── setup.md            # GCP deployment guide
│   │   ├── configuration.md    # GCP-specific configuration
│   │   └── troubleshooting.md  # GCP troubleshooting
│   ├── aws/
│   │   ├── setup.md            # AWS deployment guide
│   │   ├── configuration.md    # AWS-specific configuration
│   │   └── troubleshooting.md  # AWS troubleshooting
│   └── migration/
│       ├── gcp-to-aws.md       # Migration from GCP to AWS
│       ├── aws-to-gcp.md       # Migration from AWS to GCP
│       └── best-practices.md   # Migration best practices

Acceptance Criteria

• Complete AWS deployment documentation created
• GCP documentation updated for multi-cloud architecture
• Migration guides provide step-by-step procedures
• Troubleshooting guides address common issues
• Documentation tested by following procedures
• Visual diagrams illustrate architecture differences
• Code examples are accurate and tested
• Documentation follows consistent style and format

Key Topics to Cover

AWS Deployment:

• Account setup and billing considerations
• IAM roles and IRSA configuration
• EKS cluster creation and networking
• S3 bucket setup and access policies
• ECR repository configuration
• ALB ingress controller setup
• cert-manager configuration for SSL

Migration Procedures:

• Data backup and validation strategies
• DNS and domain migration
• User environment migration
• Storage data migration (GCS ↔ S3)
• Configuration updates and testing
• Rollback procedures and contingencies

Testing Requirements

• Follow deployment procedures on both platforms
• Validate all configuration examples work correctly
• Test migration procedures with sample data
• Verify troubleshooting guides resolve common issues
• User acceptance testing with new users

Related to

Epic #28 - Documentation & Testing

Definition of Done

• Documentation enables successful multi-cloud deployments
• Migration procedures are tested and validated
• User feedback confirms documentation clarity
• All examples and procedures are accurate
• Documentation is maintained and versioned