mirror of
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0659a346ea
In case of dual-stack, kube-proxy tries to bind both IPv4 and IPv6 health check instances to the same address and port pair which causes the following error message in the log: 'bind: address already in use'. Fix the issue by binding IPv4 instance to a 'tcp4' socket and IPv6 instance to a 'tcp6' socket. Signed-off-by: Tero Kauppinen <tero.kauppinen@est.tech>
66 lines
1.9 KiB
Go
66 lines
1.9 KiB
Go
/*
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Copyright 2016 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 healthcheck
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import (
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"context"
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"net"
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"net/http"
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netutils "k8s.io/utils/net"
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)
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// listener allows for testing of ServiceHealthServer and ProxyHealthServer.
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type listener interface {
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// Listen creates a netutils.MultiListen for the given network and addresses.
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Listen(ctx context.Context, network string, addrs ...string) (net.Listener, error)
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}
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// httpServerFactory allows for testing of ServiceHealthServer and ProxyHealthServer.
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type httpServerFactory interface {
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// New creates an instance of a type satisfying HTTPServer. This is
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// designed to include http.Server.
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New(handler http.Handler) httpServer
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}
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// httpServer allows for testing of ServiceHealthServer and ProxyHealthServer.
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// It is designed so that http.Server satisfies this interface,
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type httpServer interface {
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Serve(listener net.Listener) error
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Close() error
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}
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// Implement listener in terms of net.Listen.
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type stdNetListener struct{}
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func (stdNetListener) Listen(ctx context.Context, network string, addrs ...string) (net.Listener, error) {
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return netutils.MultiListen(ctx, network, addrs...)
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}
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var _ listener = stdNetListener{}
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// Implement httpServerFactory in terms of http.Server.
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type stdHTTPServerFactory struct{}
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func (stdHTTPServerFactory) New(handler http.Handler) httpServer {
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return &http.Server{
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Handler: handler,
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}
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}
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var _ httpServerFactory = stdHTTPServerFactory{}
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