github.com/kubewharf/katalyst-core@v0.5.3/pkg/util/overcommit/overcommit.go (about)

     1  /*
     2  Copyright 2022 The Katalyst 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 overcommit
    18  
    19  import (
    20  	"strconv"
    21  
    22  	"k8s.io/klog/v2"
    23  )
    24  
    25  func OvercommitRatioValidate(
    26  	nodeAnnotation map[string]string,
    27  	setOvercommitKey, realtimeOvercommitKey string,
    28  ) (float64, error) {
    29  	// overcommit is not allowed if overcommitRatio is not set by user
    30  	setOvercommitVal, ok := nodeAnnotation[setOvercommitKey]
    31  	if !ok {
    32  		return 1.0, nil
    33  	}
    34  
    35  	overcommitRatio, err := strconv.ParseFloat(setOvercommitVal, 64)
    36  	if err != nil {
    37  		return 1.0, err
    38  	}
    39  
    40  	realtimeOvercommitVal, ok := nodeAnnotation[realtimeOvercommitKey]
    41  	if ok {
    42  		realtimeOvercommitRatio, err := strconv.ParseFloat(realtimeOvercommitVal, 64)
    43  		if err != nil {
    44  			klog.Errorf("realtime overcommit %s validate fail: %v", realtimeOvercommitVal, err)
    45  		}
    46  		if realtimeOvercommitRatio < overcommitRatio {
    47  			overcommitRatio = realtimeOvercommitRatio
    48  		}
    49  	}
    50  
    51  	if overcommitRatio < 1.0 {
    52  		klog.Warningf("overcommitRatio should be greater than 1")
    53  		return 1.0, nil
    54  	}
    55  
    56  	return overcommitRatio, nil
    57  }