errors.go

Documentation: k8s.io/kubernetes/pkg/kubelet/cm/admission

     1  /*
     2  Copyright 2021 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package admission
    18  
    19  import (
    20  	"errors"
    21  	"fmt"
    22  
    23  	"k8s.io/kubernetes/pkg/kubelet/lifecycle"
    24  )
    25  
    26  const (
    27  	ErrorReasonUnexpected = "UnexpectedAdmissionError"
    28  )
    29  
    30  type Error interface {
    31  	Error() string
    32  	Type() string
    33  }
    34  
    35  type unexpectedAdmissionError struct{ Err error }
    36  
    37  var _ Error = (*unexpectedAdmissionError)(nil)
    38  
    39  func (e *unexpectedAdmissionError) Error() string {
    40  	return fmt.Sprintf("Allocate failed due to %v, which is unexpected", e.Err)
    41  }
    42  
    43  func (e *unexpectedAdmissionError) Type() string {
    44  	return ErrorReasonUnexpected
    45  }
    46  
    47  func GetPodAdmitResult(err error) lifecycle.PodAdmitResult {
    48  	if err == nil {
    49  		return lifecycle.PodAdmitResult{Admit: true}
    50  	}
    51  
    52  	var admissionErr Error
    53  	if !errors.As(err, &admissionErr) {
    54  		admissionErr = &unexpectedAdmissionError{err}
    55  	}
    56  
    57  	return lifecycle.PodAdmitResult{
    58  		Message: admissionErr.Error(),
    59  		Reason:  admissionErr.Type(),
    60  		Admit:   false,
    61  	}
    62  }
    63
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