mirror of
https://github.com/k3s-io/k3s.git
synced 2024-06-07 19:41:36 +00:00
97 lines
2.7 KiB
Go
97 lines
2.7 KiB
Go
/*
|
|
Copyright 2019 The Kubernetes 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 endpointslice
|
|
|
|
import (
|
|
"sort"
|
|
|
|
discovery "k8s.io/api/discovery/v1beta1"
|
|
endpointutil "k8s.io/kubernetes/pkg/controller/util/endpoint"
|
|
)
|
|
|
|
// endpointHash is used to uniquely identify endpoints. Only including addresses
|
|
// and hostnames as unique identifiers allows us to do more in place updates
|
|
// should attributes such as topology, conditions, or targetRef change.
|
|
type endpointHash string
|
|
type endpointHashObj struct {
|
|
Addresses []string
|
|
Hostname string
|
|
}
|
|
|
|
func hashEndpoint(endpoint *discovery.Endpoint) endpointHash {
|
|
sort.Strings(endpoint.Addresses)
|
|
hashObj := endpointHashObj{Addresses: endpoint.Addresses}
|
|
if endpoint.Hostname != nil {
|
|
hashObj.Hostname = *endpoint.Hostname
|
|
}
|
|
|
|
return endpointHash(endpointutil.DeepHashObjectToString(hashObj))
|
|
}
|
|
|
|
// endpointSet provides simple methods for comparing sets of Endpoints.
|
|
type endpointSet map[endpointHash]*discovery.Endpoint
|
|
|
|
// Insert adds items to the set.
|
|
func (s endpointSet) Insert(items ...*discovery.Endpoint) endpointSet {
|
|
for _, item := range items {
|
|
s[hashEndpoint(item)] = item
|
|
}
|
|
return s
|
|
}
|
|
|
|
// Delete removes all items from the set.
|
|
func (s endpointSet) Delete(items ...*discovery.Endpoint) endpointSet {
|
|
for _, item := range items {
|
|
delete(s, hashEndpoint(item))
|
|
}
|
|
return s
|
|
}
|
|
|
|
// Has returns true if and only if item is contained in the set.
|
|
func (s endpointSet) Has(item *discovery.Endpoint) bool {
|
|
_, contained := s[hashEndpoint(item)]
|
|
return contained
|
|
}
|
|
|
|
// Returns an endpoint matching the hash if contained in the set.
|
|
func (s endpointSet) Get(item *discovery.Endpoint) *discovery.Endpoint {
|
|
return s[hashEndpoint(item)]
|
|
}
|
|
|
|
// UnsortedList returns the slice with contents in random order.
|
|
func (s endpointSet) UnsortedList() []*discovery.Endpoint {
|
|
endpoints := make([]*discovery.Endpoint, 0, len(s))
|
|
for _, endpoint := range s {
|
|
endpoints = append(endpoints, endpoint)
|
|
}
|
|
return endpoints
|
|
}
|
|
|
|
// Returns a single element from the set.
|
|
func (s endpointSet) PopAny() (*discovery.Endpoint, bool) {
|
|
for _, endpoint := range s {
|
|
s.Delete(endpoint)
|
|
return endpoint, true
|
|
}
|
|
return nil, false
|
|
}
|
|
|
|
// Len returns the size of the set.
|
|
func (s endpointSet) Len() int {
|
|
return len(s)
|
|
}
|