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85 lines
2.5 KiB
Go
85 lines
2.5 KiB
Go
/*
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Copyright 2017 The Kubernetes Authors.
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package apiserver
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import (
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"net/url"
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"k8s.io/apiserver/pkg/util/proxy"
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listersv1 "k8s.io/client-go/listers/core/v1"
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)
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// A ServiceResolver knows how to get a URL given a service.
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type ServiceResolver interface {
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ResolveEndpoint(namespace, name string, port int32) (*url.URL, error)
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}
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// NewEndpointServiceResolver returns a ServiceResolver that chooses one of the
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// service's endpoints.
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func NewEndpointServiceResolver(services listersv1.ServiceLister, endpoints listersv1.EndpointsLister) ServiceResolver {
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return &aggregatorEndpointRouting{
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services: services,
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endpoints: endpoints,
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}
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}
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type aggregatorEndpointRouting struct {
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services listersv1.ServiceLister
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endpoints listersv1.EndpointsLister
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}
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func (r *aggregatorEndpointRouting) ResolveEndpoint(namespace, name string, port int32) (*url.URL, error) {
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return proxy.ResolveEndpoint(r.services, r.endpoints, namespace, name, port)
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}
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// NewClusterIPServiceResolver returns a ServiceResolver that directly calls the
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// service's cluster IP.
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func NewClusterIPServiceResolver(services listersv1.ServiceLister) ServiceResolver {
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return &aggregatorClusterRouting{
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services: services,
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}
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}
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type aggregatorClusterRouting struct {
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services listersv1.ServiceLister
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}
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func (r *aggregatorClusterRouting) ResolveEndpoint(namespace, name string, port int32) (*url.URL, error) {
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return proxy.ResolveCluster(r.services, namespace, name, port)
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}
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// NewLoopbackServiceResolver returns a ServiceResolver that routes
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// the kubernetes/default service with port 443 to loopback.
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func NewLoopbackServiceResolver(delegate ServiceResolver, host *url.URL) ServiceResolver {
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return &loopbackResolver{
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delegate: delegate,
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host: host,
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}
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}
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type loopbackResolver struct {
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delegate ServiceResolver
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host *url.URL
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}
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func (r *loopbackResolver) ResolveEndpoint(namespace, name string, port int32) (*url.URL, error) {
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if namespace == "default" && name == "kubernetes" && port == 443 {
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return r.host, nil
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}
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return r.delegate.ResolveEndpoint(namespace, name, port)
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}
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