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// Copyright 2016 The etcd 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 integration
import (
"context"
"fmt"
"net/http"
"net/http/httptest"
"os"
"strings"
"sync/atomic"
"testing"
"go.etcd.io/etcd/client/v2"
"go.etcd.io/etcd/tests/v3/integration"
)
// TestV2NoRetryEOF tests destructive api calls won't retry on a disconnection.
func TestV2NoRetryEOF(t *testing.T) {
integration.BeforeTest(t)
// generate an EOF response; specify address so appears first in sorted ep list
lEOF := integration.NewListenerWithAddr(t, fmt.Sprintf("127.0.0.1:%05d", os.Getpid()))
defer lEOF.Close()
tries := uint32(0)
go func() {
for {
conn, err := lEOF.Accept()
if err != nil {
return
}
atomic.AddUint32(&tries, 1)
conn.Close()
}
}()
eofURL := integration.URLScheme + "://" + lEOF.Addr().String()
cli := integration.MustNewHTTPClient(t, []string{eofURL, eofURL}, nil)
kapi := client.NewKeysAPI(cli)
for i, f := range noRetryList(kapi) {
startTries := atomic.LoadUint32(&tries)
if err := f(); err == nil {
t.Errorf("#%d: expected EOF error, got nil", i)
}
endTries := atomic.LoadUint32(&tries)
if startTries+1 != endTries {
t.Errorf("#%d: expected 1 try, got %d", i, endTries-startTries)
}
}
}
// TestV2NoRetryNoLeader tests destructive api calls won't retry if given an error code.
func TestV2NoRetryNoLeader(t *testing.T) {
integration.BeforeTest(t)
lHTTP := integration.NewListenerWithAddr(t, fmt.Sprintf("127.0.0.1:%05d", os.Getpid()))
eh := &errHandler{errCode: http.StatusServiceUnavailable}
srv := httptest.NewUnstartedServer(eh)
defer lHTTP.Close()
defer srv.Close()
srv.Listener = lHTTP
go srv.Start()
lHTTPURL := integration.URLScheme + "://" + lHTTP.Addr().String()
cli := integration.MustNewHTTPClient(t, []string{lHTTPURL, lHTTPURL}, nil)
kapi := client.NewKeysAPI(cli)
// test error code
for i, f := range noRetryList(kapi) {
reqs := eh.reqs
if err := f(); err == nil || !strings.Contains(err.Error(), "no leader") {
t.Errorf("#%d: expected \"no leader\", got %v", i, err)
}
if eh.reqs != reqs+1 {
t.Errorf("#%d: expected 1 request, got %d", i, eh.reqs-reqs)
}
}
}
// TestV2RetryRefuse tests destructive api calls will retry if a connection is refused.
func TestV2RetryRefuse(t *testing.T) {
integration.BeforeTest(t)
cl := integration.NewCluster(t, 1)
cl.Launch(t)
defer cl.Terminate(t)
// test connection refused; expect no error failover
cli := integration.MustNewHTTPClient(t, []string{integration.URLScheme + "://refuseconn:123", cl.URL(0)}, nil)
kapi := client.NewKeysAPI(cli)
if _, err := kapi.Set(context.Background(), "/delkey", "def", nil); err != nil {
t.Fatal(err)
}
for i, f := range noRetryList(kapi) {
if err := f(); err != nil {
t.Errorf("#%d: unexpected retry failure (%v)", i, err)
}
}
}
type errHandler struct {
errCode int
reqs int
}
func (eh *errHandler) ServeHTTP(w http.ResponseWriter, req *http.Request) {
req.Body.Close()
eh.reqs++
w.WriteHeader(eh.errCode)
}
func noRetryList(kapi client.KeysAPI) []func() error {
return []func() error{
func() error {
opts := &client.SetOptions{PrevExist: client.PrevNoExist}
_, err := kapi.Set(context.Background(), "/setkey", "bar", opts)
return err
},
func() error {
_, err := kapi.Delete(context.Background(), "/delkey", nil)
return err
},
}
}
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