Example showing how to deploy MNIST using kserve with minikube

kubernetes/kserve/examples/mnist/MNIST.md

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+# Digit recognition model with MNIST dataset using a Kubernetes cluster
+
+In this example, we show how to use a pre-trained custom MNIST model to perform real time Digit recognition with TorchServe.
+We will be serving the model using Kserve deployed using [minikube](https://minikube.sigs.k8s.io/docs/start/).
+
+The inference service would return the digit inferred by the model in the input image.
+
+
+## Install kserve
+
+Start minikube cluster
+
+```
+minikube start
+```
+
+Run the commands given in following steps from the parent directory of the root of the repository. For example, if you cloned the repository into /home/my_path/kserve, run the steps from /home/my_path/kserve
+
+Run the following for quick install of kserve
+```
+./hack/quick_install.sh
+```
+
+Make sure kserve is installed on minikube cluster using
+
+```
+kubectl get pods -n kserve
+```
+
+This should result in
+```
+NAME                                         READY   STATUS    RESTARTS   AGE
+kserve-controller-manager-57574b4878-rnsjn   2/2     Running   0          17s
+```
+
+TorchServe supports KServe V1 and V2 protocol. We show how to deploy with both for Mnist.
+
+## KServe V1 protocol
+
+Deploy `InferenceService` with Kserve V1 protocol
+
+```
+kubectl apply -f docs/samples/v1beta1/torchserve/v1/torchserve.yaml
+```
+
+results in
+
+```
+inferenceservice.serving.kserve.io/torchserve created
+```
+
+We  need to wait till the pod is up
+
+```
+kubectl get pods
+NAME                                                  READY   STATUS    RESTARTS   AGE
+torchserve-predictor-00001-deployment-8d66f9c-dkdhr   2/2     Running   0          8m19s
+```
+
+We need to set the following
+
+```
+MODEL_NAME=mnist
+SERVICE_HOSTNAME=$(kubectl get inferenceservice torchserve -o jsonpath='{.status.url}' | cut -d "/" -f 3)
+```
+
+```
+export INGRESS_HOST=localhost
+export INGRESS_PORT=8080
+```
+
+```
+INGRESS_GATEWAY_SERVICE=$(kubectl get svc --namespace istio-system --selector="app=istio-ingressgateway" --output jsonpath='{.items[0].metadata.name}')
+kubectl port-forward --namespace istio-system svc/${INGRESS_GATEWAY_SERVICE} 8080:80 &
+```
+
+Make an inference request
+
+```
+curl -H "Content-Type: application/json" -H "Host: ${SERVICE_HOSTNAME}" http://${INGRESS_HOST}:${INGRESS_PORT}/v1/models/${MODEL_NAME}:predict -d @./docs/samples/v1beta1/torchserve/v1/mnist.json
+```
+
+Expected output is
+
+```
+{"predictions":[2]}
+```
+
+## KServe V2 protocol
+
+Deploy `InferenceService` with Kserve V2 protocol
+
+```
+kubectl apply -f docs/samples/v1beta1/torchserve/v2/mnist.yaml
+```
+
+results in
+
+```
+inferenceservice.serving.kserve.io/torchserve-mnist-v2 created
+```
+
+We  need to check the pod is running with
+
+```
+kubectl get pods
+NAME                                                              READY   STATUS    RESTARTS   AGE
+torchserve-mnist-v2-predictor-00001-deployment-6c8c684dcb-4mfmr   2/2     Running   0          2m37s
+```
+
+Inspecting the logs of the pods to check the version of TorchServe
+
+```
+kubectl logs torchserve-mnist-v2-predictor-00001-deployment-6c8c684dcb-4mfmr
+Defaulted container "kserve-container" out of: kserve-container, queue-proxy, storage-initializer (init)
+WARNING: sun.reflect.Reflection.getCallerClass is not supported. This will impact performance.
+2023-10-12T20:50:39,466 [WARN ] main org.pytorch.serve.util.ConfigManager - Your torchserve instance can access any URL to load models. When deploying to production, make sure to limit the set of allowed_urls in config.properties
+2023-10-12T20:50:39,468 [INFO ] main org.pytorch.serve.servingsdk.impl.PluginsManager - Initializing plugins manager...
+2023-10-12T20:50:39,659 [INFO ] main org.pytorch.serve.metrics.configuration.MetricConfiguration - Successfully loaded metrics configuration from /home/venv/lib/python3.9/site-packages/ts/configs/metrics.yaml
+2023-10-12T20:50:39,779 [INFO ] main org.pytorch.serve.ModelServer -
+Torchserve version: 0.8.2
+TS Home: /home/venv/lib/python3.9/site-packages
+Current directory: /home/model-server
+Temp directory: /home/model-server/tmp
+Metrics config path: /home/venv/lib/python3.9/site-packages/ts/configs/metrics.yaml
+
+```
+
+We need to set the following
+
+```
+MODEL_NAME=mnist
+SERVICE_HOSTNAME=$(kubectl get inferenceservice torchserve-mnist-v2 -o jsonpath='{.status.url}' | cut -d "/" -f 3)
+```
+
+```
+export INGRESS_HOST=localhost
+export INGRESS_PORT=8080
+```
+
+```
+INGRESS_GATEWAY_SERVICE=$(kubectl get svc --namespace istio-system --selector="app=istio-ingressgateway" --output jsonpath='{.items[0].metadata.name}')
+kubectl port-forward --namespace istio-system svc/${INGRESS_GATEWAY_SERVICE} 8080:80 &
+```
+
+Make an inference request with tensor input
+
+```
+curl -v -H "Content-Type: application/json" -H "Host: ${SERVICE_HOSTNAME}" http://${INGRESS_HOST}:${INGRESS_PORT}/v2/models/${MODEL_NAME}/infer -d @./docs/samples/v1beta1/torchserve/v2/tensor_conv/mnist_v2.json
+```
+
+Expected output is
+
+```
+{"model_name":"mnist","model_version":null,"id":"d3b15cad-50a2-4eaf-80ce-8b0a428bd298","parameters":null,"outputs":[{"name":"input-0","shape":[1],"datatype":"INT64","parameters":null,"data":[1]}]}
+```
+
+## Stop and Delete the cluster
+
+```
+minikube stop
+minikube delete
+```