k8s-api-docgen is a tool that reads Go source files to extract metadata about Kubernetes API custom resources defined by the developer in Godoc and to produce different kinds of output - such as JSON or Markdown.

Its main use case is to automatically generate documentation in Markdown format to be used within a CI/CD pipeline of a software written in Go for Kubernetes, such as an operator.

To compile this software you need:

• a working Go compiler;

• a make installation (the one in MacOSX and the GNU ones are known to be working correctly).

The code has been tested on MacOS X and Linux, but should resonably work in other platforms too.

Just use the Makefile:

$ make
[...]

The tool needs to have access to the Go source files for your Kubernetes API. These are the files that will also be used by controller-gen to generate the CRD.

Supposing these files are reachable at ../operator/api/v1 you can extract the documentation in JSON format via:

$ ./bin/k8s-api-docgen ../operator/api/v1/*types.go

The JSON stream will be written to standard output. Should you desire to create a file, you can use the -o option as follows:

$ ./bin/k8s-api-docgen -o documentation.json ../operator/api/v1/*types.go

Using the -t option with md value, you can also extract the documentation in Markdown format via:

$ ./bin/k8s-api-docgen -t md -o documentation.md ../operator/api/v1/*types.go

If you provide a -c option, you could specify your custom configuration file in YAML format via

$ ./bin/k8s-api-docgen -t md -c md-configuration.yaml -o documentation.md ../operator/api/v1/*types.go

This option is useful for linking K8s documentation to types and customizing table headers.

k8s-api-docgen is distributed under Apache License 2.0. Copyright (C) 2021 EnterpriseDB Corporation. Some portions Copyright 2016 The prometheus-operator Authors.