Ports and nomenclature

This document serves as the authoritative reference for network port assignments and naming conventions within the fluxrig project.

Network port registry

To prevent conflicts and ensure consistent test automation, the project reserves the following port namespaces:

By default, fluxrig components communicate using the following standard ports:

• 4222: NATS (Client port)
• 8222: NATS (Monitoring port)

Component	Default (Production)	Test (Robot/E2E)	Description
Mixer API	8090	18080	Control Plane REST/HTTP API
Snake (NATS)	4222	14222	Embedded Message Bus (gossip/client)
ISO8583 Gear	8583	8586	Standard ISO8583 listener
Bento Gear	8000	18000	HTTP/JSON Bridge Gear

IMPORTANT

Robot Framework Overrides: Always use the ${MIXER_PORT} and ${NATS_PORT} variables in Robot suites. The fluxrigLibrary automatically tracks these overrides to ensure telemetry and metrics collection connect to the correct instances.

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Nomenclature standards

Project branding

• Formal Name: fluxrig (Always lowercase in text, headings, and filenames).
• Avoid: Flux, FluxRig (PascalCase), and FLUXRIG (uppercase, except in ENV var names like FLUXRIG_*).

Technical identifiers

We use the abbreviated flux. prefix for internal system primitives to keep names brief in high-volume streams:

• NATS Subjects: flux.msg.>, flux.telemetry.>, flux.ctrl.>
• Log Attributes: flux.type, flux.name, flux.id
• File Extensions: .flux (e.g., rack.flux for Rack Passports)
• Data Structures: fluxMsg, FluxID (PascalCase in Go code, camelCase in serialized JSON/CBOR).

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Environment variable standards

All configuration overrides must use the FLUXRIG_ prefix:

• FLUXRIG_API_PORT
• FLUXRIG_SNAKE_PORT
• FLUXRIG_LOG_LEVEL