Yeti - YANG Entry Tree Inspector

A web-based tool for browsing and inspecting YANG models.
Yeti parses YANG modules and presents them as interactive, navigable trees, making it easy to explore container hierarchies and leaf types across different model collections (e.g. Cisco IOS-XR releases).

Helm Chart

The chart is in charts/yeti/. It includes an init container that fetches YANG models from YangModels/yang on startup.

Install

helm install yeti oci://ghcr.io/terjelafton/charts/yeti

Configuration

Collections

Each collection maps to a path in the YangModels/yang repository. The init container sparse-clones only the specified paths.

collections:
  - name: xr-7112
    display: "Cisco IOS-XR 7.11.2"
    path: vendor/cisco/xr/7112

Resources

Parsing YANG models is memory-intensive. The resource requirements per collection depend on the number of models. As a reference, Cisco IOS-XR 7.11.2 and 24.4.2 each use between 1.5 and 2.0 GB of memory. Adjust based on the number of collections you deploy.

resources:
  requests:
    cpu: 100m
    memory: 2Gi
  limits:
    cpu: "1"
    memory: 4Gi

Local Development

Prerequisites: Go 1.25+, just, templ, Tailwind CSS CLI, air

Fetch YANG models and start the dev server with live reload:

just fetch-models xr-7112 vendor/cisco/xr/7112
just dev

Open http://localhost:8080.

Other useful commands:

just test    # run tests
just lint    # run linter
just fmt     # format code
just check   # run all CI checks

Kind (Local Testing)

With a Kind cluster named yeti:

just install

This builds the Docker image, loads it into Kind, and installs the chart in the yeti namespace. To use a different namespace:

just install other-namespace