ray/doc/source/serve/tutorials/tensorflow.md

1.8 KiB

(serve-tensorflow-tutorial)=

Keras and Tensorflow Tutorial

In this guide, we will train and deploy a simple Tensorflow neural net. In particular, we show:

  • How to load the model from file system in your Ray Serve definition
  • How to parse the JSON request and evaluated in Tensorflow

Please see the Key Concepts to learn more general information about Ray Serve.

Ray Serve is framework agnostic -- you can use any version of Tensorflow. However, for this tutorial, we use Tensorflow 2 and Keras. Please make sure you have Tensorflow 2 installed.

pip install "tensorflow>=2.0"

Let's import Ray Serve and some other helpers.

:end-before: __doc_import_end__
:start-after: __doc_import_begin__

We will train a simple MNIST model using Keras.

:end-before: __doc_train_model_end__
:start-after: __doc_train_model_begin__

Services are just defined as normal classes with __init__ and __call__ methods. The __call__ method will be invoked per request.

:end-before: __doc_define_servable_end__
:start-after: __doc_define_servable_begin__

Now that we've defined our services, let's deploy the model to Ray Serve. We will define a Serve deployment that will be exposed over an HTTP route.

:end-before: __doc_deploy_end__
:start-after: __doc_deploy_begin__

Let's query it!

:end-before: __doc_query_end__
:start-after: __doc_query_begin__