github.com/sealerio/sealer@v0.11.1-0.20240507115618-f4f89c5853ae/pkg/infradriver/utils.go (about)

     1  // Copyright © 2022 Alibaba Group Holding Ltd.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package infradriver
    16  
    17  import (
    18  	"fmt"
    19  	"strings"
    20  
    21  	k8sv1 "k8s.io/api/core/v1"
    22  )
    23  
    24  const (
    25  	DelSymbol   = "-"
    26  	EqualSymbol = "="
    27  	ColonSymbol = ":"
    28  )
    29  
    30  /*
    31  add:
    32  key1=value1:NoSchedule;
    33  key1:NoSchedule;
    34  key1=:NoSchedule
    35  
    36  delete:
    37  key-;
    38  key1:NoSchedule-;
    39  */
    40  // formatData process data in the specified format
    41  func formatData(data string) (k8sv1.Taint, error) {
    42  	var (
    43  		key, value, effect string
    44  		TaintEffectValues  = []k8sv1.TaintEffect{k8sv1.TaintEffectNoSchedule, k8sv1.TaintEffectNoExecute, k8sv1.TaintEffectPreferNoSchedule}
    45  	)
    46  
    47  	data = strings.TrimSpace(data)
    48  	switch {
    49  	// key1=value1:NoSchedule
    50  	case strings.Contains(data, EqualSymbol) && !strings.Contains(data, EqualSymbol+ColonSymbol) && !strings.Contains(data, DelSymbol):
    51  		temps := strings.Split(data, EqualSymbol)
    52  		if len(temps) != 2 {
    53  			return k8sv1.Taint{}, fmt.Errorf("faild to split taint argument: %s", data)
    54  		}
    55  		key = temps[0]
    56  		taintArgs := strings.Split(temps[1], ColonSymbol)
    57  		if len(taintArgs) != 2 {
    58  			return k8sv1.Taint{}, fmt.Errorf("error: invalid taint data: %s", data)
    59  		}
    60  		value, effect = taintArgs[0], taintArgs[1]
    61  		effect = strings.TrimSuffix(effect, DelSymbol)
    62  
    63  		//key1:NoSchedule
    64  	case !strings.Contains(data, EqualSymbol) && strings.Contains(data, ColonSymbol) && !strings.Contains(data, DelSymbol):
    65  		temps := strings.Split(data, ColonSymbol)
    66  		if len(temps) != 2 {
    67  			return k8sv1.Taint{}, fmt.Errorf("faild to split taint argument: %s", data)
    68  		}
    69  		key, value, effect = temps[0], "", temps[1]
    70  
    71  		//key1=:NoSchedule
    72  	case strings.Contains(data, EqualSymbol+ColonSymbol) && !strings.Contains(data, DelSymbol):
    73  		temps := strings.Split(data, EqualSymbol+ColonSymbol)
    74  		if len(temps) != 2 {
    75  			return k8sv1.Taint{}, fmt.Errorf("faild to split taint argument: %s", data)
    76  		}
    77  		key, value, effect = temps[0], "", temps[1]
    78  
    79  		// key1-
    80  	case strings.Contains(data, DelSymbol) && !strings.Contains(data, EqualSymbol) && !strings.Contains(data, ColonSymbol):
    81  		key, value, effect = data, "", ""
    82  
    83  		// key1:NoSchedule-
    84  	case strings.Contains(data, DelSymbol) && !strings.Contains(data, EqualSymbol) && strings.Contains(data, ColonSymbol):
    85  		temps := strings.Split(data, ColonSymbol)
    86  		if len(temps) != 2 {
    87  			return k8sv1.Taint{}, fmt.Errorf("faild to split taint argument: %s", data)
    88  		}
    89  		key, value, effect = temps[0], "", temps[1]
    90  	}
    91  
    92  	//determine whether the Effect is legal
    93  	if effect != "" {
    94  		taintEffect := strings.TrimSuffix(effect, DelSymbol)
    95  		if notInEffect(k8sv1.TaintEffect(taintEffect), TaintEffectValues) {
    96  			return k8sv1.Taint{}, fmt.Errorf("taint effect %s need in %v", data, TaintEffectValues)
    97  		}
    98  	}
    99  
   100  	taint := k8sv1.Taint{
   101  		Key:    key,
   102  		Value:  value,
   103  		Effect: k8sv1.TaintEffect(effect),
   104  	}
   105  	return taint, nil
   106  }
   107  
   108  func notInEffect(effect k8sv1.TaintEffect, effects []k8sv1.TaintEffect) bool {
   109  	for _, e := range effects {
   110  		if e == effect {
   111  			return false
   112  		}
   113  	}
   114  	return true
   115  }
   116  
   117  // DeleteTaintsByKey removes all the taints that have the same key to given taintKey
   118  func DeleteTaintsByKey(taints []k8sv1.Taint, taintKey string) ([]k8sv1.Taint, bool) {
   119  	newTaints := []k8sv1.Taint{}
   120  	for i := range taints {
   121  		if taintKey == taints[i].Key {
   122  			continue
   123  		}
   124  		newTaints = append(newTaints, taints[i])
   125  	}
   126  	return newTaints, len(taints) != len(newTaints)
   127  }
   128  
   129  // DeleteTaint removes all the taints that have the same key and effect to given taintToDelete.
   130  func DeleteTaint(taints []k8sv1.Taint, taintToDelete *k8sv1.Taint) ([]k8sv1.Taint, bool) {
   131  	newTaints := []k8sv1.Taint{}
   132  	for i := range taints {
   133  		if taintToDelete.MatchTaint(&taints[i]) {
   134  			continue
   135  		}
   136  		newTaints = append(newTaints, taints[i])
   137  	}
   138  	return newTaints, len(taints) != len(newTaints)
   139  }