mirror of
https://github.com/k3s-io/kubernetes.git
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125 lines
3.2 KiB
Go
125 lines
3.2 KiB
Go
/*
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Copyright 2018 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 master
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import (
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"io"
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"io/ioutil"
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"net/http"
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"sync"
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"testing"
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"time"
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"k8s.io/apimachinery/pkg/util/wait"
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"k8s.io/client-go/rest"
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kubeapiservertesting "k8s.io/kubernetes/cmd/kube-apiserver/app/testing"
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"k8s.io/kubernetes/test/integration/framework"
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)
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func TestGracefulShutdown(t *testing.T) {
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server := kubeapiservertesting.StartTestServerOrDie(t, nil, nil, framework.SharedEtcd())
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tearDownOnce := sync.Once{}
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defer tearDownOnce.Do(server.TearDownFn)
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transport, err := rest.TransportFor(server.ClientConfig)
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if err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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client := http.Client{Transport: transport}
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req, body, err := newBlockingRequest("POST", server.ClientConfig.Host+"/api/v1/namespaces")
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if err != nil {
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t.Fatal(err)
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}
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respErrCh := backgroundRoundtrip(transport, req)
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t.Logf("server should be blocking request for data in body")
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time.Sleep(time.Millisecond * 500)
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select {
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case respErr := <-respErrCh:
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if respErr.err != nil {
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t.Fatalf("unexpected error: %v", err)
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}
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bs, err := ioutil.ReadAll(respErr.resp.Body)
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if err != nil {
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t.Fatal(err)
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}
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t.Fatalf("unexpected server answer: %d, body: %s", respErr.resp.StatusCode, string(bs))
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default:
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}
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t.Logf("server should answer")
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resp, err := client.Get(server.ClientConfig.Host + "/")
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if err != nil {
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t.Fatal(err)
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}
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resp.Body.Close()
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t.Logf("shutting down server")
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tearDownOnce.Do(server.TearDownFn)
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t.Logf("server should fail new requests")
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if err := wait.Poll(time.Millisecond*100, wait.ForeverTestTimeout, func() (done bool, err error) {
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resp, err := client.Get(server.ClientConfig.Host + "/")
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if err != nil {
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return true, nil
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}
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resp.Body.Close()
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return false, nil
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}); err != nil {
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t.Fatalf("server did not shutdown")
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}
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t.Logf("server should answer pending request")
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time.Sleep(time.Millisecond * 500)
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if _, err := body.Write([]byte("garbage")); err != nil {
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t.Fatal(err)
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}
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body.Close()
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respErr := <-respErrCh
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if err != nil {
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t.Fatal(err)
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}
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defer respErr.resp.Body.Close()
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bs, err := ioutil.ReadAll(respErr.resp.Body)
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if err != nil {
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t.Fatal(err)
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}
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t.Logf("response: code %d, body: %s", respErr.resp.StatusCode, string(bs))
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}
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type responseErrorPair struct {
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resp *http.Response
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err error
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}
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func backgroundRoundtrip(transport http.RoundTripper, req *http.Request) <-chan responseErrorPair {
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ch := make(chan responseErrorPair)
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go func() {
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resp, err := transport.RoundTrip(req)
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ch <- responseErrorPair{resp, err}
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}()
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return ch
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}
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func newBlockingRequest(method, url string) (*http.Request, io.WriteCloser, error) {
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bodyReader, bodyWriter := io.Pipe()
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req, err := http.NewRequest(method, url, bodyReader)
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return req, bodyWriter, err
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}
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