vitess.io/vitess@v0.16.2/go/vt/wrangler/testlib/find_tablet_test.go (about)

     1  /*
     2  Copyright 2018 The Vitess Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package testlib
    18  
    19  import (
    20  	"testing"
    21  
    22  	"context"
    23  
    24  	"vitess.io/vitess/go/vt/logutil"
    25  	"vitess.io/vitess/go/vt/topo"
    26  	"vitess.io/vitess/go/vt/topo/memorytopo"
    27  	"vitess.io/vitess/go/vt/topo/topoproto"
    28  	"vitess.io/vitess/go/vt/topotools"
    29  	"vitess.io/vitess/go/vt/vttablet/tmclient"
    30  	"vitess.io/vitess/go/vt/wrangler"
    31  
    32  	topodatapb "vitess.io/vitess/go/vt/proto/topodata"
    33  )
    34  
    35  func TestFindTablet(t *testing.T) {
    36  	ctx := context.Background()
    37  	ts := memorytopo.NewServer("cell1", "cell2")
    38  	wr := wrangler.New(logutil.NewConsoleLogger(), ts, tmclient.NewTabletManagerClient())
    39  
    40  	// Create an old primary, two good replicas
    41  	oldPrimary := NewFakeTablet(t, wr, "cell1", 0, topodatapb.TabletType_PRIMARY, nil)
    42  	goodReplica1 := NewFakeTablet(t, wr, "cell1", 2, topodatapb.TabletType_REPLICA, nil)
    43  	goodReplica2 := NewFakeTablet(t, wr, "cell2", 3, topodatapb.TabletType_REPLICA, nil)
    44  
    45  	// Build keyspace graph
    46  	err := topotools.RebuildKeyspace(context.Background(), logutil.NewConsoleLogger(), ts, oldPrimary.Tablet.Keyspace, []string{"cell1", "cell2"}, false)
    47  	if err != nil {
    48  		t.Fatalf("RebuildKeyspaceLocked failed: %v", err)
    49  	}
    50  
    51  	// make sure we can find the tablets
    52  	// even with a datacenter being down.
    53  	tabletMap, err := ts.GetTabletMapForShardByCell(ctx, "test_keyspace", "0", []string{"cell1"})
    54  	if err != nil {
    55  		t.Fatalf("GetTabletMapForShardByCell should have worked but got: %v", err)
    56  	}
    57  	primary, err := topotools.FindTabletByHostAndPort(tabletMap, oldPrimary.Tablet.Hostname, "vt", oldPrimary.Tablet.PortMap["vt"])
    58  	if err != nil || !topoproto.TabletAliasEqual(primary, oldPrimary.Tablet.Alias) {
    59  		t.Fatalf("FindTabletByHostAndPort(primary) failed: %v %v", err, primary)
    60  	}
    61  	replica1, err := topotools.FindTabletByHostAndPort(tabletMap, goodReplica1.Tablet.Hostname, "vt", goodReplica1.Tablet.PortMap["vt"])
    62  	if err != nil || !topoproto.TabletAliasEqual(replica1, goodReplica1.Tablet.Alias) {
    63  		t.Fatalf("FindTabletByHostAndPort(replica1) failed: %v %v", err, primary)
    64  	}
    65  	replica2, err := topotools.FindTabletByHostAndPort(tabletMap, goodReplica2.Tablet.Hostname, "vt", goodReplica2.Tablet.PortMap["vt"])
    66  	if !topo.IsErrType(err, topo.NoNode) {
    67  		t.Fatalf("FindTabletByHostAndPort(replica2) worked: %v %v", err, replica2)
    68  	}
    69  
    70  	// Make sure the primary is not exported in other cells
    71  	tabletMap, _ = ts.GetTabletMapForShardByCell(ctx, "test_keyspace", "0", []string{"cell2"})
    72  	primary, err = topotools.FindTabletByHostAndPort(tabletMap, oldPrimary.Tablet.Hostname, "vt", oldPrimary.Tablet.PortMap["vt"])
    73  	if !topo.IsErrType(err, topo.NoNode) {
    74  		t.Fatalf("FindTabletByHostAndPort(primary) worked in cell2: %v %v", err, primary)
    75  	}
    76  
    77  	// Get tablet map for all cells.  If there were to be failures talking to local cells, this will return the tablet map
    78  	// and forward a partial result error
    79  	tabletMap, err = ts.GetTabletMapForShard(ctx, "test_keyspace", "0")
    80  	if err != nil {
    81  		t.Fatalf("GetTabletMapForShard should nil but got: %v", err)
    82  	}
    83  	primary, err = topotools.FindTabletByHostAndPort(tabletMap, oldPrimary.Tablet.Hostname, "vt", oldPrimary.Tablet.PortMap["vt"])
    84  	if err != nil || !topoproto.TabletAliasEqual(primary, oldPrimary.Tablet.Alias) {
    85  		t.Fatalf("FindTabletByHostAndPort(primary) failed: %v %v", err, primary)
    86  	}
    87  
    88  }