docs: add CLI user guide for fabric-orch commands
Add comprehensive documentation for the fabric-orch CLI tool covering: - Installation and quick start instructions - Environment variables for gNMI authentication - All discover subcommands (capabilities, get, set, subscribe, paths) - YANG path syntax reference and common paths table - Output formats and error handling guidance
This commit is contained in:
darnodo
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# Fabric Orchestrator CLI User Guide
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This guide covers the `fabric-orch` command-line interface for exploring YANG paths and managing Arista EVPN-VXLAN fabrics via gNMI.
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## Table of Contents
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- [Installation](#installation)
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- [Quick Start](#quick-start)
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- [Environment Variables](#environment-variables)
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- [Commands Overview](#commands-overview)
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- [discover capabilities](#discover-capabilities)
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- [discover get](#discover-get)
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- [discover set](#discover-set)
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- [discover subscribe](#discover-subscribe)
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- [discover paths](#discover-paths)
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- [Output Formats](#output-formats)
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- [Error Handling](#error-handling)
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- [Best Practices](#best-practices)
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---
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## Installation
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Ensure you have Python 3.12+ and `uv` installed, then:
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```bash
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# Clone the repository
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git clone https://gitea.arnodo.fr/Damien/fabric-orchestrator.git
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cd fabric-orchestrator
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# Install dependencies
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uv sync
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# Verify installation
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uv run fabric-orch --version
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```
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---
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## Quick Start
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```bash
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# Set environment variables (optional but recommended)
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export GNMI_TARGET="172.16.0.50:6030"
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export GNMI_USERNAME="admin"
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export GNMI_PASSWORD="admin"
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# List device capabilities
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uv run fabric-orch discover capabilities
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# Get interface state
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uv run fabric-orch discover get --path "/interfaces/interface[name=Ethernet1]/state"
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# Show common YANG paths reference
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uv run fabric-orch discover paths
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```
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---
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## Environment Variables
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The CLI supports these environment variables to avoid passing credentials repeatedly:
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| Variable | Description | Default |
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| --------------- | ----------------------------------- | ---------- |
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| `GNMI_TARGET` | Target device in `host:port` format | (required) |
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| `GNMI_USERNAME` | Username for gNMI authentication | `admin` |
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| `GNMI_PASSWORD` | Password for gNMI authentication | `admin` |
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**Example:**
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```bash
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export GNMI_TARGET="leaf1:6030"
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export GNMI_USERNAME="admin"
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export GNMI_PASSWORD="admin"
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# Now you can omit --target, --username, --password
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uv run fabric-orch discover capabilities
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```
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---
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## Commands Overview
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```
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fabric-orch
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└── discover # YANG path discovery tools
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├── capabilities # List device capabilities
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├── get # Get config/state data
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├── set # Set configuration
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├── subscribe # Subscribe to updates
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└── paths # Show common paths reference
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```
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---
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## discover capabilities
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List device capabilities and supported YANG models.
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### Usage
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```bash
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fabric-orch discover capabilities [OPTIONS]
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```
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### Options
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| Option | Short | Description |
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| -------------------------- | ----- | -------------------------------------- |
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| `--target` | `-t` | Target device (host:port) |
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| `--username` | `-u` | Username for authentication |
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| `--password` | `-p` | Password for authentication |
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| `--insecure/--no-insecure` | | Skip TLS verification (default: True) |
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| `--output` | `-o` | Output format: pretty, json, file:path |
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### Examples
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```bash
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# Basic usage with all options
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uv run fabric-orch discover capabilities \
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--target 172.16.0.50:6030 \
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--username admin \
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--password admin \
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--insecure
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# Using environment variables
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export GNMI_TARGET="172.16.0.50:6030"
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uv run fabric-orch discover capabilities
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# Output as JSON
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uv run fabric-orch discover capabilities --output json
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# Save to file
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uv run fabric-orch discover capabilities --output file:capabilities.json
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```
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### Sample Output
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```
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Device Capabilities - 172.16.0.50:6030
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gNMI Version: 0.8.0
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Supported Encodings: json_ietf, json, proto
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Supported Models (156):
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┏━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━┓
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┃ Model Name ┃ Organization ┃ Version ┃
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┡━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━┩
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│ arista-exp-eos-evpn │ Arista Networks │ 2023-01-01 │
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│ arista-exp-eos-mlag │ Arista Networks │ 2023-01-01 │
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│ arista-exp-eos-vxlan │ Arista Networks │ 2023-01-01 │
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│ openconfig-interfaces │ OpenConfig │ 2.4.3 │
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│ openconfig-network-instance │ OpenConfig │ 1.1.0 │
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│ ... │ ... │ ... │
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└───────────────────────────────────┴─────────────────┴────────────┘
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```
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---
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## discover get
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Get configuration or state data at a YANG path.
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### Usage
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```bash
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fabric-orch discover get [OPTIONS]
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```
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### Options
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| Option | Short | Description |
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| -------------------------- | ----- | -------------------------------------------- |
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| `--target` | `-t` | Target device (host:port) |
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| `--username` | `-u` | Username for authentication |
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| `--password` | `-p` | Password for authentication |
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| `--insecure/--no-insecure` | | Skip TLS verification |
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| `--output` | `-o` | Output format: pretty, json, file:path |
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| `--path` | `-P` | YANG path to get data from **(required)** |
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| `--type` | `-T` | Data type: config, state, all (default: all) |
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| `--depth` | `-d` | Maximum depth (not implemented yet) |
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### Examples
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```bash
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# Get all data at a path
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]"
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# Get config only
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]" \
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--type config
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# Get state only
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/state" \
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--type state
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# Get BGP neighbor state
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/network-instances/network-instance[name=default]/protocols/protocol[identifier=BGP][name=BGP]/bgp/neighbors/neighbor/state"
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# Get VXLAN VNI mappings
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Vxlan1]/arista-vxlan/vlan-to-vnis"
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# Save output to file
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface" \
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--output file:interfaces.json
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# Machine-readable JSON output
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uv run fabric-orch discover get \
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--target 172.16.0.50:6030 \
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--path "/system/config" \
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--output json | jq '.notification[0].update[0].val'
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```
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### Path Syntax
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YANG paths use a specific syntax:
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- **Basic path**: `/interfaces/interface`
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- **With key**: `/interfaces/interface[name=Ethernet1]`
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- **Multiple keys**: `/protocols/protocol[identifier=BGP][name=BGP]`
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- **Nested path**: `/interfaces/interface[name=Ethernet1]/state/oper-status`
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### Common Paths
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| Category | Path | Description |
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| ---------- | ----------------------------------------------------------------------------------------------------------------------------- | --------------- |
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| Interfaces | `/interfaces/interface[name=Ethernet1]/state` | Interface state |
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| BGP | `/network-instances/network-instance[name=default]/protocols/protocol[identifier=BGP][name=BGP]/bgp/neighbors/neighbor/state` | BGP neighbors |
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| VXLAN | `/interfaces/interface[name=Vxlan1]/arista-vxlan/vlan-to-vnis` | VNI mappings |
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| MLAG | `/arista/eos/mlag/config` | MLAG config |
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| System | `/system/config/hostname` | Hostname |
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---
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## discover set
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Set configuration at a YANG path.
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> ⚠️ **Warning**: This command modifies device configuration. Use with caution!
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### Usage
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```bash
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fabric-orch discover set [OPTIONS]
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```
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### Options
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| Option | Short | Description |
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| -------------------------- | ----- | ---------------------------------------------------- |
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| `--target` | `-t` | Target device (host:port) |
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| `--username` | `-u` | Username for authentication |
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| `--password` | `-p` | Password for authentication |
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| `--insecure/--no-insecure` | | Skip TLS verification |
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| `--output` | `-o` | Output format: pretty, json, file:path |
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| `--path` | `-P` | YANG path to set **(required)** |
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| `--value` | `-v` | Value to set (JSON or string) **(required)** |
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| `--operation` | `-O` | Operation: update, replace, delete (default: update) |
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| `--dry-run/--no-dry-run` | | Dry-run mode (default: True) |
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### Examples
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```bash
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# Dry-run (default) - shows what would be set
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uv run fabric-orch discover set \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/config/description" \
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--value "Uplink to Spine1"
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# Actually apply the change
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uv run fabric-orch discover set \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/config/description" \
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--value "Uplink to Spine1" \
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--no-dry-run
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# Set JSON value
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uv run fabric-orch discover set \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/config" \
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--value '{"description": "Uplink", "enabled": true}' \
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--no-dry-run
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# Replace operation (overwrites existing config)
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uv run fabric-orch discover set \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/config" \
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--value '{"description": "New config"}' \
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--operation replace \
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--no-dry-run
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# Delete configuration
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uv run fabric-orch discover set \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/config/description" \
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--value "" \
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--operation delete \
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--no-dry-run
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```
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### Operations
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| Operation | Description |
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| --------- | ------------------------------------------- |
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| `update` | Merge with existing configuration (default) |
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| `replace` | Replace existing configuration at path |
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| `delete` | Delete configuration at path |
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### Dry-Run Mode
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By default, the `set` command runs in **dry-run mode**, which shows what would be changed without applying it. This is a safety feature.
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```bash
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# Dry-run output
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⚠ DRY-RUN MODE - No changes will be applied
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SET (dry-run) /interfaces/interface[name=Ethernet1]/config/description
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Operation: update
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Value: Uplink to Spine1
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Use --no-dry-run to apply this change
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```
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---
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## discover subscribe
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Subscribe to YANG path updates in real-time.
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### Usage
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```bash
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fabric-orch discover subscribe [OPTIONS]
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```
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||||||
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### Options
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||||||
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| Option | Short | Description |
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||||||
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| -------------------------- | ----- | ------------------------------------------------------------ |
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||||||
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| `--target` | `-t` | Target device (host:port) |
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||||||
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| `--username` | `-u` | Username for authentication |
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||||||
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| `--password` | `-p` | Password for authentication |
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||||||
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| `--insecure/--no-insecure` | | Skip TLS verification |
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||||||
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| `--output` | `-o` | Output format: pretty, json, file:path |
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| `--path` | `-P` | YANG path(s) to subscribe to (can repeat) **(required)** |
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| `--mode` | `-m` | Mode: on-change, sample, target-defined (default: on-change) |
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| `--interval` | `-i` | Sample interval in seconds (for sample mode) |
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| `--count` | `-c` | Number of updates before exiting |
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### Examples
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||||||
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```bash
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# Subscribe to interface operational status changes
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||||||
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uv run fabric-orch discover subscribe \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface/state/oper-status" \
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||||||
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--mode on-change
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||||||
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||||||
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# Sample interface counters every 10 seconds
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||||||
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uv run fabric-orch discover subscribe \
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface[name=Ethernet1]/state/counters" \
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--mode sample \
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--interval 10
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||||||
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||||||
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# Subscribe to multiple paths
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||||||
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uv run fabric-orch discover subscribe \
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||||||
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--target 172.16.0.50:6030 \
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--path "/interfaces/interface/state/oper-status" \
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||||||
|
--path "/network-instances/network-instance[name=default]/protocols/protocol[identifier=BGP][name=BGP]/bgp/neighbors/neighbor/state/session-state"
|
||||||
|
|
||||||
|
# Get only 5 updates then exit
|
||||||
|
uv run fabric-orch discover subscribe \
|
||||||
|
--target 172.16.0.50:6030 \
|
||||||
|
--path "/interfaces/interface/state/counters" \
|
||||||
|
--mode sample \
|
||||||
|
--interval 5 \
|
||||||
|
--count 5
|
||||||
|
|
||||||
|
# Output as JSON (useful for piping)
|
||||||
|
uv run fabric-orch discover subscribe \
|
||||||
|
--target 172.16.0.50:6030 \
|
||||||
|
--path "/interfaces/interface/state/oper-status" \
|
||||||
|
--output json
|
||||||
|
```
|
||||||
|
|
||||||
|
### Subscription Modes
|
||||||
|
|
||||||
|
| Mode | Description |
|
||||||
|
| ---------------- | ------------------------------------------------- |
|
||||||
|
| `on-change` | Receive updates only when values change (default) |
|
||||||
|
| `sample` | Receive periodic updates at specified interval |
|
||||||
|
| `target-defined` | Let the device decide the update strategy |
|
||||||
|
|
||||||
|
### Important Note for Arista EOS
|
||||||
|
|
||||||
|
For **ON_CHANGE** subscriptions on Arista EOS, use native paths **without** module prefixes:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# ✅ Correct - native path
|
||||||
|
--path "/interfaces/interface[name=Ethernet1]/state"
|
||||||
|
|
||||||
|
# ❌ Incorrect - with module prefix (may fail)
|
||||||
|
--path "/openconfig-interfaces:interfaces/interface[name=Ethernet1]/state"
|
||||||
|
```
|
||||||
|
|
||||||
|
### Stopping Subscriptions
|
||||||
|
|
||||||
|
Press `Ctrl+C` to stop a subscription gracefully.
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## discover paths
|
||||||
|
|
||||||
|
Display a reference table of commonly used YANG paths for Arista EOS.
|
||||||
|
|
||||||
|
### Usage
|
||||||
|
|
||||||
|
```bash
|
||||||
|
fabric-orch discover paths
|
||||||
|
```
|
||||||
|
|
||||||
|
This command doesn't require a target connection - it displays a static reference.
|
||||||
|
|
||||||
|
### Example Output
|
||||||
|
|
||||||
|
```
|
||||||
|
Common YANG Paths for Arista EOS
|
||||||
|
|
||||||
|
┏━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━┳━━━━━━━━━━━━━━━━━━━━━━━━━━━┓
|
||||||
|
┃ Category ┃ Path ┃ Notes ┃
|
||||||
|
┡━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━╇━━━━━━━━━━━━━━━━━━━━━━━━━━━┩
|
||||||
|
│ Interfaces │ /interfaces/interface[name=Ethernet1]/state │ Full interface state │
|
||||||
|
│ Interfaces │ /interfaces/interface[name=Ethernet1]/state/oper-status │ Operational status │
|
||||||
|
│ Interfaces │ /interfaces/interface[name=Ethernet1]/state/counters │ Interface counters │
|
||||||
|
│ Loopbacks │ /interfaces/interface[name=Loopback0] │ Loopback interface │
|
||||||
|
│ VLANs │ /network-instances/network-instance[name=default]/vlans/vlan │ All VLANs │
|
||||||
|
│ BGP │ .../bgp/neighbors/neighbor/state │ All BGP neighbors │
|
||||||
|
│ VXLAN │ /interfaces/interface[name=Vxlan1]/arista-vxlan/vlan-to-vnis │ VLAN-to-VNI mappings │
|
||||||
|
│ VXLAN │ /interfaces/interface[name=Vxlan1]/arista-vxlan/config │ VXLAN config │
|
||||||
|
│ MLAG │ /arista/eos/mlag/config │ MLAG config (config only) │
|
||||||
|
│ EVPN │ /arista/eos/evpn │ EVPN config (config only) │
|
||||||
|
│ System │ /system/config/hostname │ System hostname │
|
||||||
|
└────────────┴──────────────────────────────────────────────────────────────────┴───────────────────────────┘
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Output Formats
|
||||||
|
|
||||||
|
All discovery commands support three output formats via the `--output` / `-o` option:
|
||||||
|
|
||||||
|
### Pretty (default)
|
||||||
|
|
||||||
|
Rich formatted output with syntax highlighting and tables.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover get --path "/system/config" --output pretty
|
||||||
|
```
|
||||||
|
|
||||||
|
### JSON
|
||||||
|
|
||||||
|
Machine-readable JSON output, suitable for piping to `jq` or other tools.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover get --path "/system/config" --output json | jq '.'
|
||||||
|
```
|
||||||
|
|
||||||
|
### File
|
||||||
|
|
||||||
|
Save output directly to a file.
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover get --path "/interfaces/interface" --output file:interfaces.json
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Error Handling
|
||||||
|
|
||||||
|
The CLI provides helpful error messages with hints:
|
||||||
|
|
||||||
|
### Connection Errors
|
||||||
|
|
||||||
|
```
|
||||||
|
✗ Connection Error: Failed to connect to 172.16.0.50:6030
|
||||||
|
|
||||||
|
Hints:
|
||||||
|
• Check if the target is reachable
|
||||||
|
• Verify gNMI is enabled on the device
|
||||||
|
• Check credentials
|
||||||
|
• Try --insecure flag for self-signed certs
|
||||||
|
```
|
||||||
|
|
||||||
|
### Path Errors
|
||||||
|
|
||||||
|
```
|
||||||
|
✗ Path Error: Path not found or invalid: /invalid/path
|
||||||
|
|
||||||
|
Hints:
|
||||||
|
• Use 'discover capabilities' to see supported models
|
||||||
|
• Check path syntax (e.g., /interfaces/interface[name=Ethernet1])
|
||||||
|
• Try a parent path first
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Best Practices
|
||||||
|
|
||||||
|
### 1. Use Environment Variables
|
||||||
|
|
||||||
|
Set credentials once to avoid repetition:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
export GNMI_TARGET="172.16.0.50:6030"
|
||||||
|
export GNMI_USERNAME="admin"
|
||||||
|
export GNMI_PASSWORD="admin"
|
||||||
|
```
|
||||||
|
|
||||||
|
### 2. Start with Capabilities
|
||||||
|
|
||||||
|
Before exploring paths, check what models the device supports:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover capabilities
|
||||||
|
```
|
||||||
|
|
||||||
|
### 3. Explore Incrementally
|
||||||
|
|
||||||
|
Start with broad paths and narrow down:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# Start broad
|
||||||
|
uv run fabric-orch discover get --path "/interfaces"
|
||||||
|
|
||||||
|
# Then narrow down
|
||||||
|
uv run fabric-orch discover get --path "/interfaces/interface[name=Ethernet1]"
|
||||||
|
|
||||||
|
# Then specific leaves
|
||||||
|
uv run fabric-orch discover get --path "/interfaces/interface[name=Ethernet1]/state/oper-status"
|
||||||
|
```
|
||||||
|
|
||||||
|
### 4. Use Dry-Run for Set Operations
|
||||||
|
|
||||||
|
Always test with dry-run first:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# Test first
|
||||||
|
uv run fabric-orch discover set --path "..." --value "..."
|
||||||
|
|
||||||
|
# Then apply
|
||||||
|
uv run fabric-orch discover set --path "..." --value "..." --no-dry-run
|
||||||
|
```
|
||||||
|
|
||||||
|
### 5. Save Exploration Results
|
||||||
|
|
||||||
|
Save interesting discoveries to files for documentation:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover get --path "/arista/eos/evpn" --output file:evpn-config.json
|
||||||
|
```
|
||||||
|
|
||||||
|
### 6. Use JSON Output for Scripting
|
||||||
|
|
||||||
|
For automation, use JSON output:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
# Get interface names
|
||||||
|
uv run fabric-orch discover get \
|
||||||
|
--path "/interfaces/interface" \
|
||||||
|
--output json | jq -r '.notification[0].update[0].val | keys[]'
|
||||||
|
```
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## Troubleshooting
|
||||||
|
|
||||||
|
### gNMI Not Responding
|
||||||
|
|
||||||
|
1. Verify gNMI is enabled on the device:
|
||||||
|
```
|
||||||
|
switch# show management api gnmi
|
||||||
|
```
|
||||||
|
|
||||||
|
2. Check the correct port (default: 6030 for Arista)
|
||||||
|
|
||||||
|
3. Ensure network connectivity:
|
||||||
|
```bash
|
||||||
|
nc -zv 172.16.0.50 6030
|
||||||
|
```
|
||||||
|
|
||||||
|
### Certificate Issues
|
||||||
|
|
||||||
|
For lab environments with self-signed certificates, always use `--insecure`:
|
||||||
|
|
||||||
|
```bash
|
||||||
|
uv run fabric-orch discover capabilities --target leaf1:6030 --insecure
|
||||||
|
```
|
||||||
|
|
||||||
|
### Path Not Found
|
||||||
|
|
||||||
|
1. Check path syntax - use exact key names
|
||||||
|
2. Verify the model is supported: `discover capabilities`
|
||||||
|
3. Try the parent path first
|
||||||
|
4. Check if it's config-only or state-only data
|
||||||
|
|
||||||
|
---
|
||||||
|
|
||||||
|
## See Also
|
||||||
|
|
||||||
|
- [YANG Paths Reference](yang-paths.md) - Detailed path documentation
|
||||||
|
- [gNMI Module README](../src/gnmi/README.md) - Python API documentation
|
||||||
Reference in New Issue
Block a user