Add Pooler method to replicaset that returns Pooler interface

CHANGELOG.md

@@ -1,5 +1,10 @@
 ## Unreleased
 
+FEATURES:
+
+* Implemented Pooler method that returns go-tarantool Pooler interface. That can be used by some go-tarantool modules(
+  like box).
+
 BUG FIXES:
 
 * ClusterBootstrap: eliminate direct access to r.idToReplicaset.

replicaset.go

@@ -55,6 +55,10 @@ type Replicaset struct {
 	EtalonBucketCount uint64
 }
 
+func (rs *Replicaset) Pooler() pool.Pooler {
+	return rs.conn
+}
+
 func (rs *Replicaset) String() string {
 	return rs.info.String()
 }

tarantool_test.go

@@ -12,6 +12,8 @@ import (
 	"github.com/google/uuid"
 	"github.com/stretchr/testify/require"
 	"github.com/tarantool/go-tarantool/v2"
+	"github.com/tarantool/go-tarantool/v2/box"
+	"github.com/tarantool/go-tarantool/v2/pool"
 	"github.com/tarantool/go-tarantool/v2/test_helpers"
 	vshardrouter "github.com/tarantool/go-vshard-router"
 	"github.com/tarantool/go-vshard-router/providers/static"
@@ -611,3 +613,29 @@ func testRouterRouteWithMode(t *testing.T, searchMode vshardrouter.BucketsSearch
 		}
 	}
 }
+
+// TestReplicaset_Pooler tests that pooler logic works ok with replicaset.
+func TestReplicaset_Pooler(t *testing.T) {
+	ctx := context.Background()
+
+	router, err := vshardrouter.NewRouter(ctx, vshardrouter.Config{
+		TopologyProvider: static.NewProvider(topology),
+		DiscoveryTimeout: 5 * time.Second,
+		DiscoveryMode:    vshardrouter.DiscoveryModeOn,
+		TotalBucketCount: totalBucketCount,
+		User:             username,
+	})
+	require.Nil(t, err, "NewRouter created successfully")
+
+	t.Run("go-tarantool box module works ok with go-vshard replicaset", func(t *testing.T) {
+		// check that masters are alive
+		for _, rs := range router.RouteAll() {
+			b := box.New(pool.NewConnectorAdapter(rs.Pooler(), pool.RW))
+			require.NotNil(t, b)
+
+			info, err := b.Info()
+			require.NoError(t, err, "master respond info")
+			require.False(t, info.RO, "it is not RO")
+		}
+	})
+}