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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.
package clientv3test
import (
"context"
"testing"
"time"
"go.etcd.io/etcd/client/v3"
"go.etcd.io/etcd/client/v3/ordering"
"go.etcd.io/etcd/tests/v3/integration"
)
func TestEndpointSwitchResolvesViolation(t *testing.T) {
integration.BeforeTest(t)
clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3})
defer clus.Terminate(t)
eps := []string{
clus.Members[0].GRPCURL(),
clus.Members[1].GRPCURL(),
clus.Members[2].GRPCURL(),
}
cfg := clientv3.Config{Endpoints: []string{clus.Members[0].GRPCURL()}}
cli, err := integration.NewClient(t, cfg)
if err != nil {
t.Fatal(err)
}
defer cli.Close()
ctx := context.TODO()
if _, err = clus.Client(0).Put(ctx, "foo", "bar"); err != nil {
t.Fatal(err)
}
// ensure that the second member has current revision for key "foo"
if _, err = clus.Client(1).Get(ctx, "foo"); err != nil {
t.Fatal(err)
}
// create partition between third members and the first two members
// in order to guarantee that the third member's revision of "foo"
// falls behind as updates to "foo" are issued to the first two members.
clus.Members[2].InjectPartition(t, clus.Members[:2]...)
time.Sleep(1 * time.Second) // give enough time for the operation
// update to "foo" will not be replicated to the third member due to the partition
if _, err = clus.Client(1).Put(ctx, "foo", "buzz"); err != nil {
t.Fatal(err)
}
cli.SetEndpoints(eps...)
time.Sleep(1 * time.Second) // give enough time for the operation
orderingKv := ordering.NewKV(cli.KV, ordering.NewOrderViolationSwitchEndpointClosure(cli))
// set prevRev to the second member's revision of "foo" such that
// the revision is higher than the third member's revision of "foo"
_, err = orderingKv.Get(ctx, "foo")
if err != nil {
t.Fatal(err)
}
t.Logf("Reconfigure client to speak only to the 'partitioned' member")
cli.SetEndpoints(clus.Members[2].GRPCURL())
time.Sleep(1 * time.Second) // give enough time for the operation
t.Log("Getting data from the partitioned member...")
_, err = orderingKv.Get(ctx, "foo", clientv3.WithSerializable())
if err != ordering.ErrNoGreaterRev {
t.Fatalf("While speaking to partitioned leader, we should get ErrNoGreaterRev error, %v", err)
}
}
func TestUnresolvableOrderViolation(t *testing.T) {
integration.BeforeTest(t)
clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 5, SkipCreatingClient: true, UseBridge: true})
defer clus.Terminate(t)
cfg := clientv3.Config{
Endpoints: []string{
clus.Members[0].GRPCURL(),
clus.Members[1].GRPCURL(),
clus.Members[2].GRPCURL(),
clus.Members[3].GRPCURL(),
clus.Members[4].GRPCURL(),
},
}
cli, err := integration.NewClient(t, cfg)
if err != nil {
t.Fatal(err)
}
defer cli.Close()
eps := cli.Endpoints()
ctx := context.TODO()
cli.SetEndpoints(clus.Members[0].GRPCURL())
time.Sleep(1 * time.Second)
_, err = cli.Put(ctx, "foo", "bar")
if err != nil {
t.Fatal(err)
}
// stop fourth member in order to force the member to have an outdated revision
clus.Members[3].Stop(t)
time.Sleep(1 * time.Second) // give enough time for operation
// stop fifth member in order to force the member to have an outdated revision
clus.Members[4].Stop(t)
time.Sleep(1 * time.Second) // give enough time for operation
_, err = cli.Put(ctx, "foo", "buzz")
if err != nil {
t.Fatal(err)
}
cli.SetEndpoints(eps...)
time.Sleep(1 * time.Second) // give enough time for operation
OrderingKv := ordering.NewKV(cli.KV, ordering.NewOrderViolationSwitchEndpointClosure(cli))
// set prevRev to the first member's revision of "foo" such that
// the revision is higher than the fourth and fifth members' revision of "foo"
_, err = OrderingKv.Get(ctx, "foo")
if err != nil {
t.Fatal(err)
}
clus.Members[0].Stop(t)
clus.Members[1].Stop(t)
clus.Members[2].Stop(t)
err = clus.Members[3].Restart(t)
if err != nil {
t.Fatal(err)
}
err = clus.Members[4].Restart(t)
if err != nil {
t.Fatal(err)
}
clus.Members[3].WaitStarted(t)
cli.SetEndpoints(clus.Members[3].GRPCURL())
_, err = OrderingKv.Get(ctx, "foo", clientv3.WithSerializable())
if err != ordering.ErrNoGreaterRev {
t.Fatalf("expected %v, got %v", ordering.ErrNoGreaterRev, err)
}
}
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