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Anthony Romano
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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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package integration | ||
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import ( | ||
"fmt" | ||
"testing" | ||
"time" | ||
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epb "github.com/coreos/etcd/etcdserver/api/v3election/v3electionpb" | ||
pb "github.com/coreos/etcd/etcdserver/etcdserverpb" | ||
"github.com/coreos/etcd/pkg/testutil" | ||
"golang.org/x/net/context" | ||
) | ||
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// TestV3ElectionCampaign checks that Campaign will not give | ||
// simultaneous leadership to multiple campaigners. | ||
func TestV3ElectionCampaign(t *testing.T) { | ||
defer testutil.AfterTest(t) | ||
clus := NewClusterV3(t, &ClusterConfig{Size: 1}) | ||
defer clus.Terminate(t) | ||
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lease1, err1 := toGRPC(clus.RandClient()).Lease.LeaseGrant(context.TODO(), &pb.LeaseGrantRequest{TTL: 30}) | ||
if err1 != nil { | ||
t.Fatal(err1) | ||
} | ||
lease2, err2 := toGRPC(clus.RandClient()).Lease.LeaseGrant(context.TODO(), &pb.LeaseGrantRequest{TTL: 30}) | ||
if err2 != nil { | ||
t.Fatal(err2) | ||
} | ||
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lc := epb.NewElectionClient(clus.Client(0).ActiveConnection()) | ||
req1 := &epb.CampaignRequest{Name: []byte("foo"), Lease: lease1.ID, Value: []byte("abc")} | ||
l1, lerr1 := lc.Campaign(context.TODO(), req1) | ||
if lerr1 != nil { | ||
t.Fatal(lerr1) | ||
} | ||
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campaignc := make(chan struct{}) | ||
go func() { | ||
defer close(campaignc) | ||
req2 := &epb.CampaignRequest{Name: []byte("foo"), Lease: lease2.ID, Value: []byte("def")} | ||
l2, lerr2 := lc.Campaign(context.TODO(), req2) | ||
if lerr2 != nil { | ||
t.Fatal(lerr2) | ||
} | ||
if l1.Header.Revision >= l2.Header.Revision { | ||
t.Fatalf("expected l1 revision < l2 revision, got %d >= %d", l1.Header.Revision, l2.Header.Revision) | ||
} | ||
}() | ||
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select { | ||
case <-time.After(200 * time.Millisecond): | ||
case <-campaignc: | ||
t.Fatalf("got leadership before resign") | ||
} | ||
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if _, uerr := lc.Resign(context.TODO(), &epb.ResignRequest{Leader: l1.Leader}); uerr != nil { | ||
t.Fatal(uerr) | ||
} | ||
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select { | ||
case <-time.After(200 * time.Millisecond): | ||
t.Fatalf("campaigner unelected after resign") | ||
case <-campaignc: | ||
} | ||
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lval, lverr := lc.Leader(context.TODO(), &epb.LeaderRequest{Name: []byte("foo")}) | ||
if lverr != nil { | ||
t.Fatal(lverr) | ||
} | ||
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if string(lval.Kv.Value) != "def" { | ||
t.Fatalf("got election value %q, expected %q", string(lval.Kv.Value), "def") | ||
} | ||
} | ||
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// TestV3ElectionObserve checks that an Observe stream receives | ||
// proclamations from different leaders uninterrupted. | ||
func TestV3ElectionObserve(t *testing.T) { | ||
defer testutil.AfterTest(t) | ||
clus := NewClusterV3(t, &ClusterConfig{Size: 1}) | ||
defer clus.Terminate(t) | ||
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lc := epb.NewElectionClient(clus.Client(0).ActiveConnection()) | ||
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// observe 10 leadership events | ||
observec := make(chan struct{}) | ||
go func() { | ||
defer close(observec) | ||
s, err := lc.Observe(context.Background(), &epb.LeaderRequest{Name: []byte("foo")}) | ||
observec <- struct{}{} | ||
if err != nil { | ||
t.Fatal(err) | ||
} | ||
for i := 0; i < 10; i++ { | ||
resp, rerr := s.Recv() | ||
if rerr != nil { | ||
t.Fatal(rerr) | ||
} | ||
if string(resp.Kv.Value) != fmt.Sprintf("%d", i) { | ||
t.Fatalf(`got observe value %q, expected "%d"`, string(resp.Kv.Value), i) | ||
} | ||
} | ||
}() | ||
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select { | ||
case <-observec: | ||
case <-time.After(time.Second): | ||
t.Fatalf("observe stream took too long to start") | ||
} | ||
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lease1, err1 := toGRPC(clus.RandClient()).Lease.LeaseGrant(context.TODO(), &pb.LeaseGrantRequest{TTL: 30}) | ||
if err1 != nil { | ||
t.Fatal(err1) | ||
} | ||
c1, cerr1 := lc.Campaign(context.TODO(), &epb.CampaignRequest{Name: []byte("foo"), Lease: lease1.ID, Value: []byte("0")}) | ||
if cerr1 != nil { | ||
t.Fatal(cerr1) | ||
} | ||
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// overlap other leader so it waits on resign | ||
leader2c := make(chan struct{}) | ||
go func() { | ||
defer close(leader2c) | ||
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lease2, err2 := toGRPC(clus.RandClient()).Lease.LeaseGrant(context.TODO(), &pb.LeaseGrantRequest{TTL: 30}) | ||
if err2 != nil { | ||
t.Fatal(err2) | ||
} | ||
c2, cerr2 := lc.Campaign(context.TODO(), &epb.CampaignRequest{Name: []byte("foo"), Lease: lease2.ID, Value: []byte("5")}) | ||
if cerr2 != nil { | ||
t.Fatal(cerr2) | ||
} | ||
for i := 6; i < 10; i++ { | ||
v := []byte(fmt.Sprintf("%d", i)) | ||
req := &epb.ProclaimRequest{Leader: c2.Leader, Value: v} | ||
if _, err := lc.Proclaim(context.TODO(), req); err != nil { | ||
t.Fatal(err) | ||
} | ||
} | ||
}() | ||
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for i := 1; i < 5; i++ { | ||
v := []byte(fmt.Sprintf("%d", i)) | ||
req := &epb.ProclaimRequest{Leader: c1.Leader, Value: v} | ||
if _, err := lc.Proclaim(context.TODO(), req); err != nil { | ||
t.Fatal(err) | ||
} | ||
} | ||
// start second leader | ||
lc.Resign(context.TODO(), &epb.ResignRequest{Leader: c1.Leader}) | ||
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select { | ||
case <-observec: | ||
case <-time.After(time.Second): | ||
t.Fatalf("observe did not observe all events in time") | ||
} | ||
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<-leader2c | ||
} |