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07-kubernetes-tf-serving.md

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10.7 Deploying TensorFlow models to Kubernetes

In this section we'll deploy tf-serving model to kubernetes. In order to do that we'll create a separate folder kube-config and implement the following steps:

  • Create deployment for the tf-serving model model-deployment.yaml: 
    • apiVersion: apps/v1
kind: Deployment
metadata:
  name: tf-serving-clothing-model
spec:
  replicas: 1
  selector:
    matchLabels:
      app: tf-serving-clothing-model
  template:
    metadata:
      labels:
        app: tf-serving-clothing-model
    spec:
      containers:
      - name: tf-serving-clothing-model
        image: zoomcamp-10-model:xception-v4-001
        resources:
          limits:
            memory: "512Mi"
            cpu: "0.5"
        ports:
        - containerPort: 8500
    • Load the model image to kind: kind load docker-image clothing-model:xception-v4-001
    • Create model deployment: kubectl apply -f model-deployment.yaml
    • Get the running pod id for the model: kubectl get pod
    • Test the model deployment using the pod id: kubectl port-forword tf-serving-clothing-model-85cd6dsb6-rfvg410m 8500:8500 and run gateway.py script to get the predictions.
  • Create service of tf-serving model model-service.yaml: 
    • apiVersion: v1
kind: Service
metadata:
  name: tf-serving-clothing-model
spec:
  type: ClusterIP # default service type is always ClusterIP (i.e., internal service)
  selector:
    app: tf-serving-clothing-model
  ports:
  - port: 8500
    targetPort: 8500
    • Create model service: kubectl apply -f mdoel-service.yaml
    • Check the model service: kubectl get service.
    • Test the model service: kubectl port-forward service/tf-serving-clothing-model 8500:8500 and run gateway.py for predictions.
  • Create deployment for the gateway gateway-deployment.yaml: 
    • apiVersion: apps/v1
kind: Deployment
metadata:
  name: gateway
spec:
  selector:
    matchLabels:
      app: gateway
  template:
    metadata:
      labels:
        app: gateway
    spec:
      containers:
      - name: gateway
        image: zoomcamp-10-gateway:002
        resources:
          limits:
            memory: "128Mi"
            cpu: "100m"
        ports:
        - containerPort: 9696
        env: # set the enivornment variable for model
          - name: TF_SERVING_HOST
            value: tf-serving-clothing-model.default.svc.cluster.local:8500 # kubernates naming convention
    • Load the gateway image to kind: kind load docker-image clothing-model-gateway:002
    • Create gateway deployment kubectl apply -f gateway-deployment.yaml and get the running pod id kubectl get pod
    • Test the gateway pod: kubectl port-forward gateway-6b945f541-9gptfd 9696:9696 and execute test.py for get predictions.
  • Create service of tf-serving model gateway-service.yaml: 
    • apiVersion: v1
kind: Service
metadata:
  name: gateway
spec:
  type: LoadBalancer # External service to communicate with client (i.e., LoadBalancer)
  selector:
    app: gateway
  ports:
  - port: 80 # port of the service
    targetPort: 9696 # port of load balancer
    • Create gateway service: kubectl apply -f gateway-service.yaml
    • Get service id: kubectl get service
    • Test the gateway service: kubectl port-forward service/gateway 8080:80 and replace the url on test.py to 8080 to get predictions.

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Notes

Add notes from the video (PRs are welcome)

  • tensorflow serving in C++, gateway service as flask app
  • gateway service: image preprocessing (i.e. resizing), prepare matrix, numpy arr, convert to protobuf, gRPC to communicate with tensorflow serving; postprocessing
  • using telnet to check kubernetes pod
⚠️ The notes are written by the community.
If you see an error here, please create a PR with a fix.

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