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clientv3/integration: add TestWatchKeepAlive
Signed-off-by: Gyu-Ho Lee <gyuhox@gmail.com>
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// Copyright 2017 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. | ||
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// +build !cluster_proxy | ||
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package integration | ||
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import ( | ||
"testing" | ||
"time" | ||
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"github.com/coreos/etcd/clientv3" | ||
"github.com/coreos/etcd/integration" | ||
"github.com/coreos/etcd/pkg/testutil" | ||
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"golang.org/x/net/context" | ||
) | ||
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// TestWatchKeepAlive tests when watch discovers it cannot talk to | ||
// blackholed endpoint, client balancer switches to healthy one. | ||
// TODO: test with '-tags cluster_proxy' | ||
func TestWatchKeepAlive(t *testing.T) { | ||
defer testutil.AfterTest(t) | ||
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clus := integration.NewClusterV3(t, &integration.ClusterConfig{ | ||
Size: 3, | ||
GRPCKeepAliveMinTime: time.Millisecond, // avoid too_many_pings | ||
GRPCKeepAliveInterval: 2 * time.Second, // server-to-client ping | ||
GRPCKeepAliveTimeout: 2 * time.Second, | ||
}) | ||
defer clus.Terminate(t) | ||
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ccfg := clientv3.Config{ | ||
Endpoints: []string{clus.Members[0].GRPCAddr()}, | ||
DialTimeout: 3 * time.Second, | ||
DialKeepAliveTime: 2 * time.Second, | ||
DialKeepAliveTimeout: 2 * time.Second, | ||
} | ||
cli, err := clientv3.New(ccfg) | ||
if err != nil { | ||
t.Fatal(err) | ||
} | ||
defer cli.Close() | ||
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wch := cli.Watch(context.Background(), "foo", clientv3.WithCreatedNotify()) | ||
if _, ok := <-wch; !ok { | ||
t.Fatalf("watch failed on creation") | ||
} | ||
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clus.Members[0].Blackhole() | ||
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// expects endpoint switch to ep[1] | ||
cli.SetEndpoints(clus.Members[0].GRPCAddr(), clus.Members[1].GRPCAddr()) | ||
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// ep[0] keepalive time-out after DialKeepAliveTime + DialKeepAliveTimeout | ||
// wait extra for processing network error for endpoint switching | ||
timeout := ccfg.DialKeepAliveTime + ccfg.DialKeepAliveTimeout + ccfg.DialTimeout | ||
time.Sleep(timeout) | ||
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if _, err = clus.Client(1).Put(context.TODO(), "foo", "bar"); err != nil { | ||
t.Fatal(err) | ||
} | ||
select { | ||
case <-wch: | ||
case <-time.After(5 * time.Second): | ||
t.Fatal("took too long to receive events") | ||
} | ||
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clus.Members[0].Unblackhole() | ||
clus.Members[1].Blackhole() | ||
defer clus.Members[1].Unblackhole() | ||
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// wait for ep[0] recover, ep[1] fail | ||
time.Sleep(timeout) | ||
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if _, err = clus.Client(0).Put(context.TODO(), "foo", "bar"); err != nil { | ||
t.Fatal(err) | ||
} | ||
select { | ||
case <-wch: | ||
case <-time.After(5 * time.Second): | ||
t.Fatal("took too long to receive events") | ||
} | ||
} |