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Merge pull request #6656 from yudai/balancer_fast_fail
clientv3: make balancer respect FastFail
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,106 @@ | ||
| // 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 clientv3 | ||
|
|
||
| import ( | ||
| "errors" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "golang.org/x/net/context" | ||
| "google.golang.org/grpc" | ||
| ) | ||
|
|
||
| var ( | ||
| endpoints = []string{"localhost:2379", "localhost:22379", "localhost:32379"} | ||
| ) | ||
|
|
||
| func TestBalancerGetUnblocking(t *testing.T) { | ||
| sb := newSimpleBalancer(endpoints) | ||
| unblockingOpts := grpc.BalancerGetOptions{BlockingWait: false} | ||
|
|
||
| _, _, err := sb.Get(context.Background(), unblockingOpts) | ||
| if err != ErrNoAddrAvilable { | ||
| t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err) | ||
| } | ||
|
|
||
| down1 := sb.Up(grpc.Address{Addr: endpoints[1]}) | ||
| down2 := sb.Up(grpc.Address{Addr: endpoints[2]}) | ||
| addrFirst, putFun, err := sb.Get(context.Background(), unblockingOpts) | ||
| if err != nil { | ||
| t.Errorf("Get() with up endpoints should sucess, got %v", err) | ||
| } | ||
| if addrFirst.Addr != endpoints[1] && addrFirst.Addr != endpoints[2] { | ||
| t.Errorf("Get() didn't return expected address, got %v", addrFirst) | ||
| } | ||
| if putFun == nil { | ||
| t.Errorf("Get() returned unexpected nil put function") | ||
| } | ||
| addrSecond, _, _ := sb.Get(context.Background(), unblockingOpts) | ||
| if addrSecond.Addr != addrSecond.Addr { | ||
| t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond) | ||
| } | ||
|
|
||
| down1(errors.New("error")) | ||
| down2(errors.New("error")) | ||
| _, _, err = sb.Get(context.Background(), unblockingOpts) | ||
| if err != ErrNoAddrAvilable { | ||
| t.Errorf("Get() with no up endpoints should return ErrNoAddrAvailable, got: %v", err) | ||
| } | ||
| } | ||
|
|
||
| func TestBalancerGetBlocking(t *testing.T) { | ||
| sb := newSimpleBalancer(endpoints) | ||
| blockingOpts := grpc.BalancerGetOptions{BlockingWait: true} | ||
|
|
||
| ctx, _ := context.WithTimeout(context.Background(), time.Millisecond*100) | ||
| _, _, err := sb.Get(ctx, blockingOpts) | ||
| if err != context.DeadlineExceeded { | ||
| t.Errorf("Get() with no up endpoints should timeout, got %v", err) | ||
| } | ||
|
|
||
| downC := make(chan func(error), 1) | ||
|
|
||
| go func() { | ||
| // ensure sb.Up() will be called after sb.Get() to see if Up() releases blocking Get() | ||
| time.Sleep(time.Millisecond * 100) | ||
| downC <- sb.Up(grpc.Address{Addr: endpoints[1]}) | ||
| }() | ||
| addrFirst, putFun, err := sb.Get(context.Background(), blockingOpts) | ||
| if err != nil { | ||
| t.Errorf("Get() with up endpoints should sucess, got %v", err) | ||
| } | ||
| if addrFirst.Addr != endpoints[1] { | ||
| t.Errorf("Get() didn't return expected address, got %v", addrFirst) | ||
| } | ||
| if putFun == nil { | ||
| t.Errorf("Get() returned unexpected nil put function") | ||
| } | ||
| down1 := <-downC | ||
|
|
||
| down2 := sb.Up(grpc.Address{Addr: endpoints[2]}) | ||
| addrSecond, _, _ := sb.Get(context.Background(), blockingOpts) | ||
| if addrSecond.Addr != addrSecond.Addr { | ||
| t.Errorf("Get() didn't return the same address as previous call, got %v and %v", addrFirst, addrSecond) | ||
| } | ||
|
|
||
| down1(errors.New("error")) | ||
| down2(errors.New("error")) | ||
| ctx, _ = context.WithTimeout(context.Background(), time.Millisecond*100) | ||
| _, _, err = sb.Get(ctx, blockingOpts) | ||
| if err != context.DeadlineExceeded { | ||
| t.Errorf("Get() with no up endpoints should timeout, got %v", err) | ||
| } | ||
| } |
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