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Deploy InferenceService with a saved model on Google Cloud Storage (GCS)

Using Public GCS Bucket

If no credential is provided, anonymous client will be used to download the artifact from GCS bucket. The uri is in the following format:

gs://${BUCKET_ NAME}/${PATH}

e.g. gs://kfserving-examples/models/tensorflow/flowers

Using Private GCS bucket

KServe supports authenticating using Google Service Account Key

Create a Service Account Key

  • To create a Service Account Key follow the steps here.
  • Base64 encode the generated Service Account Key file

Create Google Secret

Create secret

apiVersion: v1
kind: Secret
metadata:
  name: storage-config
type: Opaque
stringData:
  gcs: |
    {
      "type": "gs",
      "bucket": "mlpipeline",
      "base64_service_account": "c2VydmljZWFjY291bnQ=" # base64 encoded value of the credential file
    }

kubectl apply -f create-gcs-secret.yaml

Deploy the model on GCS with InferenceService

Create the InferenceService with the Google service account credential

apiVersion: serving.kserve.io/v1beta1
kind: InferenceService
metadata:
    name: sklearn-gcs
spec:
  predictor:
      sklearn:
        storage:
          key: gcs
          path: models/tensorflow/flowers
          parameters: # Parameters to override the default values
            bucket: kfserving-examples

Apply the sklearn-gcs.yaml.

kubectl apply -f sklearn-gcs.yaml

Run a prediction

Now, the ingress can be accessed at ${INGRESS_HOST}:${INGRESS_PORT} or follow this instruction to find out the ingress IP and port.

SERVICE_HOSTNAME=$(kubectl get inferenceservice sklearn-gcs -o jsonpath='{.status.url}' | cut -d "/" -f 3)

MODEL_NAME=sklearn-gcs
INPUT_PATH=@./input.json
curl -v -H "Host: ${SERVICE_HOSTNAME}" -H "Content-Type: application/json" http://${INGRESS_HOST}:${INGRESS_PORT}/v1/models/$MODEL_NAME:predict -d $INPUT_PATH

Expected Output

*   Trying 127.0.0.1:8080...
* TCP_NODELAY set
* Connected to localhost (127.0.0.1) port 8080 (#0)
> POST /v1/models/sklearn-gcs:predict HTTP/1.1
> Host: sklearn-gcs.default.example.com
> User-Agent: curl/7.68.0
> Accept: */*
> Content-Length: 84
> Content-Type: application/x-www-form-urlencoded
>
* upload completely sent off: 84 out of 84 bytes
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< content-length: 23
< content-type: application/json; charset=UTF-8
< date: Mon, 20 Sep 2021 04:55:50 GMT
< server: istio-envoy
< x-envoy-upstream-service-time: 6
<
* Connection #0 to host localhost left intact
{"predictions": [1, 1]}
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