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validation.go
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validation.go
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// Copyright 2018 The Kubeflow Authors
//
// 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 validation
import (
"fmt"
torchv1 "github.com/kubeflow/arena/pkg/operators/pytorch-operator/apis/pytorch/v1"
)
func ValidateV1PyTorchJobSpec(c *torchv1.PyTorchJobSpec) error {
if c.PyTorchReplicaSpecs == nil {
return fmt.Errorf("PyTorchJobSpec is not valid")
}
masterExists := false
for rType, value := range c.PyTorchReplicaSpecs {
if value == nil || len(value.Template.Spec.Containers) == 0 {
return fmt.Errorf("PyTorchJobSpec is not valid: containers definition expected in %v", rType)
}
// Make sure the replica type is valid.
validReplicaTypes := []torchv1.PyTorchReplicaType{torchv1.PyTorchReplicaTypeMaster, torchv1.PyTorchReplicaTypeWorker}
isValidReplicaType := false
for _, t := range validReplicaTypes {
if t == rType {
isValidReplicaType = true
break
}
}
if !isValidReplicaType {
return fmt.Errorf("PyTorchReplicaType is %v but must be one of %v", rType, validReplicaTypes)
}
//Make sure the image is defined in the container
defaultContainerPresent := false
for _, container := range value.Template.Spec.Containers {
if container.Image == "" {
msg := fmt.Sprintf("PyTorchJobSpec is not valid: Image is undefined in the container of %v", rType)
return fmt.Errorf(msg)
}
if container.Name == torchv1.DefaultContainerName {
defaultContainerPresent = true
}
}
//Make sure there has at least one container named "pytorch"
if !defaultContainerPresent {
msg := fmt.Sprintf("PyTorchJobSpec is not valid: There is no container named %s in %v", torchv1.DefaultContainerName, rType)
return fmt.Errorf(msg)
}
if rType == torchv1.PyTorchReplicaTypeMaster {
masterExists = true
if value.Replicas != nil && int(*value.Replicas) != 1 {
return fmt.Errorf("PyTorchJobSpec is not valid: There must be only 1 master replica")
}
}
}
if !masterExists {
return fmt.Errorf("PyTorchJobSpec is not valid: Master ReplicaSpec must be present")
}
return nil
}