| // 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 ordering |
| |
| import ( |
| "context" |
| "testing" |
| "time" |
| |
| "github.com/coreos/etcd/clientv3" |
| "github.com/coreos/etcd/integration" |
| "github.com/coreos/etcd/pkg/testutil" |
| ) |
| |
| func TestEndpointSwitchResolvesViolation(t *testing.T) { |
| defer testutil.AfterTest(t) |
| clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 3}) |
| defer clus.Terminate(t) |
| eps := []string{ |
| clus.Members[0].GRPCAddr(), |
| clus.Members[1].GRPCAddr(), |
| clus.Members[2].GRPCAddr(), |
| } |
| cfg := clientv3.Config{Endpoints: []string{clus.Members[0].GRPCAddr()}} |
| cli, err := clientv3.New(cfg) |
| if err != nil { |
| t.Fatal(err) |
| } |
| |
| 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) |
| } |
| |
| // reset client endpoints to all members such that the copy of cli sent to |
| // NewOrderViolationSwitchEndpointClosure will be able to |
| // access the full list of endpoints. |
| cli.SetEndpoints(eps...) |
| OrderingKv := NewKV(cli.KV, 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) |
| } |
| |
| cli.SetEndpoints(clus.Members[2].GRPCAddr()) |
| time.Sleep(1 * time.Second) // give enough time for operation |
| _, err = OrderingKv.Get(ctx, "foo", clientv3.WithSerializable()) |
| if err != nil { |
| t.Fatalf("failed to resolve order violation %v", err) |
| } |
| } |
| |
| func TestUnresolvableOrderViolation(t *testing.T) { |
| defer testutil.AfterTest(t) |
| clus := integration.NewClusterV3(t, &integration.ClusterConfig{Size: 5, SkipCreatingClient: true}) |
| defer clus.Terminate(t) |
| cfg := clientv3.Config{ |
| Endpoints: []string{ |
| clus.Members[0].GRPCAddr(), |
| clus.Members[1].GRPCAddr(), |
| clus.Members[2].GRPCAddr(), |
| clus.Members[3].GRPCAddr(), |
| clus.Members[4].GRPCAddr(), |
| }, |
| } |
| cli, err := clientv3.New(cfg) |
| if err != nil { |
| t.Fatal(err) |
| } |
| eps := cli.Endpoints() |
| ctx := context.TODO() |
| |
| cli.SetEndpoints(clus.Members[0].GRPCAddr()) |
| 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) |
| } |
| |
| // reset client endpoints to all members such that the copy of cli sent to |
| // NewOrderViolationSwitchEndpointClosure will be able to |
| // access the full list of endpoints. |
| cli.SetEndpoints(eps...) |
| OrderingKv := NewKV(cli.KV, 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) |
| clus.Members[3].Restart(t) |
| clus.Members[4].Restart(t) |
| cli.SetEndpoints(clus.Members[3].GRPCAddr()) |
| time.Sleep(1 * time.Second) // give enough time for operation |
| |
| _, err = OrderingKv.Get(ctx, "foo", clientv3.WithSerializable()) |
| if err != ErrNoGreaterRev { |
| t.Fatalf("expected %v, got %v", ErrNoGreaterRev, err) |
| } |
| } |