sigs.k8s.io/cluster-api@v1.7.1/controlplane/kubeadm/internal/etcd/util/util.go (about)

     1  /*
     2  Copyright 2020 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 util implements etcd utility functions.
    18  package util
    19  
    20  import (
    21  	"k8s.io/apimachinery/pkg/util/sets"
    22  
    23  	"sigs.k8s.io/cluster-api/controlplane/kubeadm/internal/etcd"
    24  )
    25  
    26  // MemberForName returns the etcd member with the matching name.
    27  func MemberForName(members []*etcd.Member, name string) *etcd.Member {
    28  	for _, m := range members {
    29  		if m.Name == name {
    30  			return m
    31  		}
    32  	}
    33  	return nil
    34  }
    35  
    36  // MemberNames returns a list of all the etcd member names.
    37  func MemberNames(members []*etcd.Member) []string {
    38  	names := make([]string, 0, len(members))
    39  	for _, m := range members {
    40  		names = append(names, m.Name)
    41  	}
    42  	return names
    43  }
    44  
    45  // MemberEqual returns true if the lists of members match.
    46  //
    47  // This function only checks that set of names of each member
    48  // within the lists is the same.
    49  func MemberEqual(members1, members2 []*etcd.Member) bool {
    50  	names1 := sets.Set[string]{}.Insert(MemberNames(members1)...)
    51  	names2 := sets.Set[string]{}.Insert(MemberNames(members2)...)
    52  	return names1.Equal(names2)
    53  }