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transformer.go
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transformer.go
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/*
Copyright 2020 kubeflow.org.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package v1alpha2
import (
"fmt"
"github.com/kubeflow/kfserving/pkg/constants"
v1 "k8s.io/api/core/v1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/klog"
)
// Constants
const (
ExactlyOneTransformerViolatedError = "Exactly one of [Custom, Feast] must be specified in TransformerSpec"
)
// +k8s:openapi-gen=false
// +k8s:deepcopy-gen=false
// Transformer interface is implemented by all Transformers
// +kubebuilder:object:generate=false
type Transformer interface {
GetContainerSpec() *v1.Container
GetStorageUri() string
ApplyDefaults(config *InferenceServicesConfig)
Validate(config *InferenceServicesConfig) error
}
// Returns a URI to the model. This URI is passed to the storage-initializer via the StorageInitializerSourceUriInternalAnnotationKey
func (t *TransformerSpec) GetStorageUri() string {
transformer, err := getTransformer(t)
if err != nil {
return ""
}
return transformer.GetStorageUri()
}
// GetContainerSpec for the transformer
func (t *TransformerSpec) GetContainerSpec(metadata metav1.ObjectMeta, isCanary bool) *v1.Container {
transformer, err := getTransformer(t)
if err != nil {
return &v1.Container{}
}
container := transformer.GetContainerSpec().DeepCopy()
modelNameExists := false
for _, arg := range container.Args {
if arg == constants.ArgumentModelName {
modelNameExists = true
}
}
if !modelNameExists {
container.Args = append(container.Args, []string{
constants.ArgumentModelName,
metadata.Name,
}...)
}
container.Args = append(container.Args, []string{
constants.ArgumentPredictorHost,
constants.PredictorURL(metadata, isCanary),
constants.ArgumentHttpPort,
constants.InferenceServiceDefaultHttpPort,
}...)
return container
}
// ApplyDefaults to the TransformerSpec
func (t *TransformerSpec) ApplyDefaults(config *InferenceServicesConfig) {
transformer, err := getTransformer(t)
if err == nil {
transformer.ApplyDefaults(config)
}
}
// Validate the TransformerSpec
func (t *TransformerSpec) Validate(config *InferenceServicesConfig) error {
transformer, err := getTransformer(t)
if err != nil {
return err
}
for _, err := range []error{
validateParallelism(t.Parallelism),
validateReplicas(t.MinReplicas, t.MaxReplicas),
transformer.Validate(config),
validateLogger(t.Logger),
} {
if err != nil {
return err
}
}
return nil
}
func getTransformer(t *TransformerSpec) (Transformer, error) {
transformers := []Transformer{}
if t.Custom != nil {
transformers = append(transformers, t.Custom)
}
// Fail if not exactly one
if len(transformers) != 1 {
err := fmt.Errorf(ExactlyOneTransformerViolatedError)
klog.Error(err)
return nil, err
}
return transformers[0], nil
}