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portfolio/migration-validation-framework/docs/architecture.md
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Migration Validation Framework Architecture

Components

  • CLI: parses operator commands and coordinates workflows.
  • Collectors: gather mounts, services, and disk usage from target systems.
  • Snapshot files: JSON evidence used as immutable migration checkpoints.
  • Comparator: evaluates drift between before and after snapshots.
  • Reports: stores JSON or HTML output for audit and review.

Data Flow

Operator
  -> python3 cli.py collect
  -> collectors over SSH
  -> before.json / after.json
  -> python3 cli.py compare
  -> diff.json with PASS/FAIL validation

Validation Flow

before.json -> Comparator -> service checks
after.json  -> Comparator -> filesystem checks -> validation result
                         -> mount checks

The framework keeps collection and comparison separate so migration evidence can be reviewed, archived, and replayed without recollecting from production systems.