389 lines
10 KiB
Markdown
389 lines
10 KiB
Markdown
|
OpsBridgeFrs
|
|||
|
|
|
|||
|
|
*Functional requirements specification for OpsBridge*
|
|||
|
|
|
|||
|
|
# OpsBridge Functional Requirements Specification
|
|||
|
|
|
|||
|
|
*Operations Access Bridges for Humans and Automation Agents*
|
|||
|
|
|
|||
|
|
Version: **0.1**
|
|||
|
|
Status: Draft
|
|||
|
|
Date: **2026-03-11**
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 1. Definition
|
|||
|
|
|
|||
|
|
The **OpsBridge Functional Requirements Specification (FRS)** defines the externally observable behaviors and capabilities that the OpsBridge system must provide in order to support controlled operational access bridges between infrastructure components.
|
|||
|
|
|
|||
|
|
OpsBridge enables human operators and automation agents to establish, inspect, and manage temporary infrastructure access paths, typically realized through secure connectivity mechanisms such as reverse SSH tunnels.
|
|||
|
|
|
|||
|
|
This specification describes **system behavior from the perspective of users, external systems, and observable outputs**, without prescribing implementation methods or internal system design.
|
|||
|
|
|
|||
|
|
The FRS provides the functional contract that guides system design, development, verification, and operational validation.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 2. Context
|
|||
|
|
|
|||
|
|
OpsBridge operates within infrastructure environments where controlled access between systems must be established dynamically for operational purposes such as diagnostics, maintenance, and remediation.
|
|||
|
|
|
|||
|
|
These environments may involve interactions between:
|
|||
|
|
|
|||
|
|
* human operators
|
|||
|
|
* automation agents
|
|||
|
|
* remote execution environments
|
|||
|
|
* infrastructure control services
|
|||
|
|
* identity management systems
|
|||
|
|
|
|||
|
|
The FRS translates the product intent defined in the OpsBridge PRD into **precise functional expectations** that describe how the system must behave when interacting with users, external services, and infrastructure components.
|
|||
|
|
|
|||
|
|
Within the system documentation hierarchy:
|
|||
|
|
|
|||
|
|
* **PRD** defines the product intent and scope
|
|||
|
|
* **FRS** defines externally observable system behavior
|
|||
|
|
* **design specifications** describe the internal architecture that realizes those behaviors
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 3. Core Concepts
|
|||
|
|
|
|||
|
|
## Bridge
|
|||
|
|
|
|||
|
|
A **Bridge** represents a controlled operational access path between two infrastructure contexts.
|
|||
|
|
|
|||
|
|
The bridge enables connectivity between:
|
|||
|
|
|
|||
|
|
* a remote host environment
|
|||
|
|
* a local service or endpoint
|
|||
|
|
|
|||
|
|
Bridges are created, monitored, and terminated through OpsBridge system functions.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Actor
|
|||
|
|
|
|||
|
|
An **Actor** represents an entity initiating a bridge operation.
|
|||
|
|
|
|||
|
|
Actors may include:
|
|||
|
|
|
|||
|
|
* human operators
|
|||
|
|
* automation agents
|
|||
|
|
* automated maintenance systems
|
|||
|
|
|
|||
|
|
Actor identity is used for operations attribution and auditability.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Target
|
|||
|
|
|
|||
|
|
A **Target** represents an infrastructure component that can be accessed via a bridge.
|
|||
|
|
|
|||
|
|
Targets may include:
|
|||
|
|
|
|||
|
|
* hosts
|
|||
|
|
* services
|
|||
|
|
* containers
|
|||
|
|
* Kubernetes workloads
|
|||
|
|
* operations control interfaces
|
|||
|
|
|
|||
|
|
Targets provide a structured orientation model for infrastructure access.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Bridge State
|
|||
|
|
|
|||
|
|
A **Bridge State** represents the externally observable operational status of a bridge.
|
|||
|
|
|
|||
|
|
Examples include:
|
|||
|
|
|
|||
|
|
* stopped
|
|||
|
|
* starting
|
|||
|
|
* connected
|
|||
|
|
* degraded
|
|||
|
|
* failed
|
|||
|
|
|
|||
|
|
Bridge state information must be visible to users and external systems.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Bridge Lifecycle Event
|
|||
|
|
|
|||
|
|
A **Bridge Lifecycle Event** represents a state transition or operational occurrence related to a bridge.
|
|||
|
|
|
|||
|
|
Examples include:
|
|||
|
|
|
|||
|
|
* bridge creation
|
|||
|
|
* bridge connection established
|
|||
|
|
* bridge disconnection
|
|||
|
|
* health check failure
|
|||
|
|
|
|||
|
|
Lifecycle events must be observable through system outputs such as logs or status queries.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 4. Scope and Non-Scope
|
|||
|
|
|
|||
|
|
## In Scope
|
|||
|
|
|
|||
|
|
This specification defines functional requirements for:
|
|||
|
|
|
|||
|
|
* creation and termination of bridges
|
|||
|
|
* inspection of bridge state and lifecycle
|
|||
|
|
* actor attribution for bridge operations
|
|||
|
|
* health monitoring of bridged services
|
|||
|
|
* visibility of reachable infrastructure targets
|
|||
|
|
* interaction with external identity systems
|
|||
|
|
* generation of operational audit information
|
|||
|
|
|
|||
|
|
The FRS focuses on **externally observable system behavior**.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## Out of Scope
|
|||
|
|
|
|||
|
|
The following aspects are intentionally excluded from this specification:
|
|||
|
|
|
|||
|
|
* technical implementation details
|
|||
|
|
* internal system architecture
|
|||
|
|
* specific algorithms or process models
|
|||
|
|
* command-line interface layout or formatting
|
|||
|
|
* performance or scalability characteristics unless functionally expressed
|
|||
|
|
* security mechanisms beyond observable behavior
|
|||
|
|
|
|||
|
|
These aspects are defined in design and architecture specifications.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 5. Functional Requirements
|
|||
|
|
|
|||
|
|
The following sections define the functional behavior required from the OpsBridge system.
|
|||
|
|
|
|||
|
|
Requirement statements are written in a declarative form suitable for verification.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.1 Bridge Creation
|
|||
|
|
|
|||
|
|
### FR-1 — Bridge Initiation
|
|||
|
|
|
|||
|
|
The system shall allow an actor to initiate the creation of a bridge using a defined bridge identifier.
|
|||
|
|
|
|||
|
|
### FR-2 — Bridge Configuration Retrieval
|
|||
|
|
|
|||
|
|
Upon initiation of a bridge, the system shall retrieve the configuration associated with the specified bridge identifier.
|
|||
|
|
|
|||
|
|
### FR-3 — Bridge Establishment
|
|||
|
|
|
|||
|
|
The system shall establish an operational access bridge according to the retrieved configuration.
|
|||
|
|
|
|||
|
|
### FR-4 — Bridge State Notification
|
|||
|
|
|
|||
|
|
Upon successful establishment of a bridge, the system shall report the bridge state as **connected**.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.2 Bridge Termination
|
|||
|
|
|
|||
|
|
### FR-5 — Bridge Termination Request
|
|||
|
|
|
|||
|
|
The system shall allow an actor to terminate an active bridge.
|
|||
|
|
|
|||
|
|
### FR-6 — Bridge Shutdown
|
|||
|
|
|
|||
|
|
Upon termination request, the system shall stop the active bridge.
|
|||
|
|
|
|||
|
|
### FR-7 — State Update After Termination
|
|||
|
|
|
|||
|
|
After termination, the system shall update the bridge state to **stopped**.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.3 Bridge Restart
|
|||
|
|
|
|||
|
|
### FR-8 — Bridge Restart Request
|
|||
|
|
|
|||
|
|
The system shall allow an actor to request the restart of a bridge.
|
|||
|
|
|
|||
|
|
### FR-9 — Restart Execution
|
|||
|
|
|
|||
|
|
Upon receiving a restart request, the system shall terminate the active bridge and initiate a new bridge using the existing configuration.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.4 Bridge Status Inspection
|
|||
|
|
|
|||
|
|
### FR-10 — Bridge Status Query
|
|||
|
|
|
|||
|
|
The system shall allow actors to query the operational status of bridges.
|
|||
|
|
|
|||
|
|
### FR-11 — Status Reporting
|
|||
|
|
|
|||
|
|
For each bridge, the system shall report:
|
|||
|
|
|
|||
|
|
* bridge identifier
|
|||
|
|
* current bridge state
|
|||
|
|
* associated actor
|
|||
|
|
* remote host
|
|||
|
|
* uptime or connection duration if available
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.5 Bridge Lifecycle Monitoring
|
|||
|
|
|
|||
|
|
### FR-12 — Disconnection Detection
|
|||
|
|
|
|||
|
|
The system shall detect when an established bridge becomes disconnected.
|
|||
|
|
|
|||
|
|
### FR-13 — Automatic Reconnection
|
|||
|
|
|
|||
|
|
If a bridge disconnects unexpectedly, the system shall attempt to re-establish the bridge according to the bridge configuration.
|
|||
|
|
|
|||
|
|
### FR-14 — State Reporting During Reconnection
|
|||
|
|
|
|||
|
|
During reconnection attempts, the system shall report the bridge state as **reconnecting** or equivalent.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.6 Health Monitoring
|
|||
|
|
|
|||
|
|
### FR-15 — Health Check Execution
|
|||
|
|
|
|||
|
|
The system shall support optional health checks associated with a bridge.
|
|||
|
|
|
|||
|
|
### FR-16 — Health Status Reporting
|
|||
|
|
|
|||
|
|
The system shall report the result of health checks associated with a bridge.
|
|||
|
|
|
|||
|
|
### FR-17 — Degraded State
|
|||
|
|
|
|||
|
|
If a health check indicates failure while the bridge remains connected, the system shall report the bridge state as **degraded**.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.7 Actor Attribution
|
|||
|
|
|
|||
|
|
### FR-18 — Actor Identification
|
|||
|
|
|
|||
|
|
The system shall associate each bridge with a defined actor.
|
|||
|
|
|
|||
|
|
### FR-19 — Actor Visibility
|
|||
|
|
|
|||
|
|
The system shall include actor identification information in bridge status reports.
|
|||
|
|
|
|||
|
|
### FR-20 — Actor Attribution in Events
|
|||
|
|
|
|||
|
|
The system shall include actor identity information in operations event records.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.8 Infrastructure Target Discovery
|
|||
|
|
|
|||
|
|
### FR-21 — Target Catalog Query
|
|||
|
|
|
|||
|
|
The system shall allow actors to retrieve a list of defined infrastructure targets.
|
|||
|
|
|
|||
|
|
### FR-22 — Target Reachability Inspection
|
|||
|
|
|
|||
|
|
The system shall allow actors to inspect which bridges provide access to a given target.
|
|||
|
|
|
|||
|
|
### FR-23 — Infrastructure Orientation
|
|||
|
|
|
|||
|
|
The system shall provide a representation of infrastructure targets and their reachable access paths.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.9 Audit Logging
|
|||
|
|
|
|||
|
|
### FR-24 — Lifecycle Event Logging
|
|||
|
|
|
|||
|
|
The system shall record lifecycle events related to bridges.
|
|||
|
|
|
|||
|
|
### FR-25 — Actor Attribution in Logs
|
|||
|
|
|
|||
|
|
Audit records shall include actor identity information associated with bridge operations.
|
|||
|
|
|
|||
|
|
### FR-26 — Operations Event Visibility
|
|||
|
|
|
|||
|
|
Operations events shall be retrievable by actors for inspection.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
## 5.10 Identity Integration
|
|||
|
|
|
|||
|
|
### FR-27 — Identity Provider Interaction
|
|||
|
|
|
|||
|
|
The system shall support interaction with external identity systems to obtain credentials required for bridge establishment.
|
|||
|
|
|
|||
|
|
### FR-28 — Credential Use
|
|||
|
|
|
|||
|
|
The system shall use credentials obtained from external identity systems when establishing bridges.
|
|||
|
|
|
|||
|
|
### FR-29 — Identity Attribution
|
|||
|
|
|
|||
|
|
The system shall associate the identity of actors provided by external identity systems with bridge lifecycle events.
|
|||
|
|
|
|||
|
|
External identity systems may include:
|
|||
|
|
|
|||
|
|
* privacyIDEA
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 6. Functional Constraints
|
|||
|
|
|
|||
|
|
The following constraints influence system behavior.
|
|||
|
|
|
|||
|
|
### FC-1 — Configuration Dependency
|
|||
|
|
|
|||
|
|
Bridge operations depend on the existence of valid bridge configuration entries.
|
|||
|
|
|
|||
|
|
### FC-2 — External Connectivity
|
|||
|
|
|
|||
|
|
Bridge establishment requires network connectivity to the remote host defined in the configuration.
|
|||
|
|
|
|||
|
|
### FC-3 — Credential Availability
|
|||
|
|
|
|||
|
|
Bridge establishment requires valid credentials available through the configured identity integration mechanism.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 7. Traceability
|
|||
|
|
|
|||
|
|
Each functional requirement defined in this document traces back to the product intent defined in the OpsBridge PRD.
|
|||
|
|
|
|||
|
|
Primary traceability relationships include:
|
|||
|
|
|
|||
|
|
| PRD Concept | FRS Requirement Group |
|
|||
|
|
| -------------------------- | --------------------- |
|
|||
|
|
| Operations Access Bridges | FR-1 to FR-14 |
|
|||
|
|
| Actor Attribution | FR-18 to FR-20 |
|
|||
|
|
| Infrastructure Orientation | FR-21 to FR-23 |
|
|||
|
|
| Operations Observability | FR-10 to FR-17 |
|
|||
|
|
| Identity Integration | FR-27 to FR-29 |
|
|||
|
|
|
|||
|
|
This traceability enables downstream artifacts such as:
|
|||
|
|
|
|||
|
|
* design specifications
|
|||
|
|
* system tests
|
|||
|
|
* acceptance criteria
|
|||
|
|
* validation procedures
|
|||
|
|
|
|||
|
|
to map back to the originating product requirements.
|
|||
|
|
|
|||
|
|
---
|
|||
|
|
|
|||
|
|
# 8. Related Concepts
|
|||
|
|
|
|||
|
|
The OpsBridge Functional Requirements Specification relates to several adjacent artifacts.
|
|||
|
|
|
|||
|
|
* **Product Requirements Document (PRD)** – Defines product intent and scope.
|
|||
|
|
* **Non-Functional Requirements (NFR)** – Define performance, reliability, and security expectations.
|
|||
|
|
* **System Design Specification (SDS)** – Describes the architecture used to implement the defined functions.
|
|||
|
|
* **Use Case Specifications** – Provide scenario-level interaction descriptions for system behavior.
|
|||
|
|
|
|||
|
|
Together these artifacts form a layered documentation structure supporting the full system lifecycle.
|
|||
|
|
|
|||
|
|
|
|||
|
|
|
|||
|
|
xxx
|