mirror of https://github.com/k3s-io/k3s
84 lines
2.5 KiB
Go
84 lines
2.5 KiB
Go
/*
|
|
Copyright 2017 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 apiserver
|
|
|
|
import (
|
|
"net/url"
|
|
|
|
"k8s.io/apiserver/pkg/util/proxy"
|
|
listersv1 "k8s.io/client-go/listers/core/v1"
|
|
)
|
|
|
|
// A ServiceResolver knows how to get a URL given a service.
|
|
type ServiceResolver interface {
|
|
ResolveEndpoint(namespace, name string) (*url.URL, error)
|
|
}
|
|
|
|
// NewEndpointServiceResolver returns a ServiceResolver that chooses one of the
|
|
// service's endpoints.
|
|
func NewEndpointServiceResolver(services listersv1.ServiceLister, endpoints listersv1.EndpointsLister) ServiceResolver {
|
|
return &aggregatorEndpointRouting{
|
|
services: services,
|
|
endpoints: endpoints,
|
|
}
|
|
}
|
|
|
|
type aggregatorEndpointRouting struct {
|
|
services listersv1.ServiceLister
|
|
endpoints listersv1.EndpointsLister
|
|
}
|
|
|
|
func (r *aggregatorEndpointRouting) ResolveEndpoint(namespace, name string) (*url.URL, error) {
|
|
return proxy.ResolveEndpoint(r.services, r.endpoints, namespace, name)
|
|
}
|
|
|
|
// NewClusterIPServiceResolver returns a ServiceResolver that directly calls the
|
|
// service's cluster IP.
|
|
func NewClusterIPServiceResolver(services listersv1.ServiceLister) ServiceResolver {
|
|
return &aggregatorClusterRouting{
|
|
services: services,
|
|
}
|
|
}
|
|
|
|
type aggregatorClusterRouting struct {
|
|
services listersv1.ServiceLister
|
|
}
|
|
|
|
func (r *aggregatorClusterRouting) ResolveEndpoint(namespace, name string) (*url.URL, error) {
|
|
return proxy.ResolveCluster(r.services, namespace, name)
|
|
}
|
|
|
|
// NewLoopbackServiceResolver returns a ServiceResolver that routes the kubernetes/default service to loopback.
|
|
func NewLoopbackServiceResolver(delegate ServiceResolver, host *url.URL) ServiceResolver {
|
|
return &loopbackResolver{
|
|
delegate: delegate,
|
|
host: host,
|
|
}
|
|
}
|
|
|
|
type loopbackResolver struct {
|
|
delegate ServiceResolver
|
|
host *url.URL
|
|
}
|
|
|
|
func (r *loopbackResolver) ResolveEndpoint(namespace, name string) (*url.URL, error) {
|
|
if namespace == "default" && name == "kubernetes" {
|
|
return r.host, nil
|
|
}
|
|
return r.delegate.ResolveEndpoint(namespace, name)
|
|
}
|