package redis_test import ( "fmt" "net" "strconv" "strings" "sync" "testing" "time" "gopkg.in/redis.v5" "gopkg.in/redis.v5/internal/hashtag" . "github.com/onsi/ginkgo" . "github.com/onsi/gomega" ) type clusterScenario struct { ports []string nodeIds []string processes map[string]*redisProcess clients map[string]*redis.Client } func (s *clusterScenario) masters() []*redis.Client { result := make([]*redis.Client, 3) for pos, port := range s.ports[:3] { result[pos] = s.clients[port] } return result } func (s *clusterScenario) slaves() []*redis.Client { result := make([]*redis.Client, 3) for pos, port := range s.ports[3:] { result[pos] = s.clients[port] } return result } func (s *clusterScenario) clusterClient(opt *redis.ClusterOptions) *redis.ClusterClient { addrs := make([]string, len(s.ports)) for i, port := range s.ports { addrs[i] = net.JoinHostPort("127.0.0.1", port) } opt.Addrs = addrs return redis.NewClusterClient(opt) } func startCluster(scenario *clusterScenario) error { // Start processes and collect node ids for pos, port := range scenario.ports { process, err := startRedis(port, "--cluster-enabled", "yes") if err != nil { return err } client := redis.NewClient(&redis.Options{ Addr: ":" + port, }) info, err := client.ClusterNodes().Result() if err != nil { return err } scenario.processes[port] = process scenario.clients[port] = client scenario.nodeIds[pos] = info[:40] } // Meet cluster nodes for _, client := range scenario.clients { err := client.ClusterMeet("127.0.0.1", scenario.ports[0]).Err() if err != nil { return err } } // Bootstrap masters slots := []int{0, 5000, 10000, 16384} for pos, master := range scenario.masters() { err := master.ClusterAddSlotsRange(slots[pos], slots[pos+1]-1).Err() if err != nil { return err } } // Bootstrap slaves for idx, slave := range scenario.slaves() { masterId := scenario.nodeIds[idx] // Wait until master is available err := eventually(func() error { s := slave.ClusterNodes().Val() wanted := masterId if !strings.Contains(s, wanted) { return fmt.Errorf("%q does not contain %q", s, wanted) } return nil }, 10*time.Second) if err != nil { return err } err = slave.ClusterReplicate(masterId).Err() if err != nil { return err } } // Wait until all nodes have consistent info for _, client := range scenario.clients { err := eventually(func() error { res, err := client.ClusterSlots().Result() if err != nil { return err } wanted := []redis.ClusterSlot{ {0, 4999, []redis.ClusterNode{{"", "127.0.0.1:8220"}, {"", "127.0.0.1:8223"}}}, {5000, 9999, []redis.ClusterNode{{"", "127.0.0.1:8221"}, {"", "127.0.0.1:8224"}}}, {10000, 16383, []redis.ClusterNode{{"", "127.0.0.1:8222"}, {"", "127.0.0.1:8225"}}}, } return assertSlotsEqual(res, wanted) }, 30*time.Second) if err != nil { return err } } return nil } func assertSlotsEqual(slots, wanted []redis.ClusterSlot) error { outer_loop: for _, s2 := range wanted { for _, s1 := range slots { if slotEqual(s1, s2) { continue outer_loop } } return fmt.Errorf("%v not found in %v", s2, slots) } return nil } func slotEqual(s1, s2 redis.ClusterSlot) bool { if s1.Start != s2.Start { return false } if s1.End != s2.End { return false } if len(s1.Nodes) != len(s2.Nodes) { return false } for i, n1 := range s1.Nodes { if n1.Addr != s2.Nodes[i].Addr { return false } } return true } func stopCluster(scenario *clusterScenario) error { for _, client := range scenario.clients { if err := client.Close(); err != nil { return err } } for _, process := range scenario.processes { if err := process.Close(); err != nil { return err } } return nil } //------------------------------------------------------------------------------ var _ = Describe("ClusterClient", func() { var opt *redis.ClusterOptions var client *redis.ClusterClient assertClusterClient := func() { It("should CLUSTER SLOTS", func() { res, err := client.ClusterSlots().Result() Expect(err).NotTo(HaveOccurred()) Expect(res).To(HaveLen(3)) wanted := []redis.ClusterSlot{ {0, 4999, []redis.ClusterNode{{"", "127.0.0.1:8220"}, {"", "127.0.0.1:8223"}}}, {5000, 9999, []redis.ClusterNode{{"", "127.0.0.1:8221"}, {"", "127.0.0.1:8224"}}}, {10000, 16383, []redis.ClusterNode{{"", "127.0.0.1:8222"}, {"", "127.0.0.1:8225"}}}, } Expect(assertSlotsEqual(res, wanted)).NotTo(HaveOccurred()) }) It("should CLUSTER NODES", func() { res, err := client.ClusterNodes().Result() Expect(err).NotTo(HaveOccurred()) Expect(len(res)).To(BeNumerically(">", 400)) }) It("should CLUSTER INFO", func() { res, err := client.ClusterInfo().Result() Expect(err).NotTo(HaveOccurred()) Expect(res).To(ContainSubstring("cluster_known_nodes:6")) }) It("should CLUSTER KEYSLOT", func() { hashSlot, err := client.ClusterKeySlot("somekey").Result() Expect(err).NotTo(HaveOccurred()) Expect(hashSlot).To(Equal(int64(hashtag.Slot("somekey")))) }) It("should CLUSTER COUNT-FAILURE-REPORTS", func() { n, err := client.ClusterCountFailureReports(cluster.nodeIds[0]).Result() Expect(err).NotTo(HaveOccurred()) Expect(n).To(Equal(int64(0))) }) It("should CLUSTER COUNTKEYSINSLOT", func() { n, err := client.ClusterCountKeysInSlot(10).Result() Expect(err).NotTo(HaveOccurred()) Expect(n).To(Equal(int64(0))) }) It("should CLUSTER SAVECONFIG", func() { res, err := client.ClusterSaveConfig().Result() Expect(err).NotTo(HaveOccurred()) Expect(res).To(Equal("OK")) }) It("should CLUSTER SLAVES", func() { nodesList, err := client.ClusterSlaves(cluster.nodeIds[0]).Result() Expect(err).NotTo(HaveOccurred()) Expect(nodesList).Should(ContainElement(ContainSubstring("slave"))) Expect(nodesList).Should(HaveLen(1)) }) It("should GET/SET/DEL", func() { val, err := client.Get("A").Result() Expect(err).To(Equal(redis.Nil)) Expect(val).To(Equal("")) val, err = client.Set("A", "VALUE", 0).Result() Expect(err).NotTo(HaveOccurred()) Expect(val).To(Equal("OK")) val, err = client.Get("A").Result() Expect(err).NotTo(HaveOccurred()) Expect(val).To(Equal("VALUE")) cnt, err := client.Del("A").Result() Expect(err).NotTo(HaveOccurred()) Expect(cnt).To(Equal(int64(1))) }) It("returns pool stats", func() { Expect(client.PoolStats()).To(BeAssignableToTypeOf(&redis.PoolStats{})) }) It("removes idle connections", func() { stats := client.PoolStats() Expect(stats.TotalConns).NotTo(BeZero()) Expect(stats.FreeConns).NotTo(BeZero()) time.Sleep(2 * time.Second) stats = client.PoolStats() Expect(stats.TotalConns).To(BeZero()) Expect(stats.FreeConns).To(BeZero()) }) It("follows redirects", func() { Expect(client.Set("A", "VALUE", 0).Err()).NotTo(HaveOccurred()) slot := hashtag.Slot("A") Expect(client.SwapSlotNodes(slot)).To(Equal([]string{"127.0.0.1:8224", "127.0.0.1:8221"})) val, err := client.Get("A").Result() Expect(err).NotTo(HaveOccurred()) Expect(val).To(Equal("VALUE")) }) It("returns an error when there are no attempts left", func() { opt := redisClusterOptions() opt.MaxRedirects = -1 client := cluster.clusterClient(opt) slot := hashtag.Slot("A") Expect(client.SwapSlotNodes(slot)).To(Equal([]string{"127.0.0.1:8224", "127.0.0.1:8221"})) err := client.Get("A").Err() Expect(err).To(HaveOccurred()) Expect(err.Error()).To(ContainSubstring("MOVED")) Expect(client.Close()).NotTo(HaveOccurred()) }) It("distributes keys", func() { for i := 0; i < 100; i++ { err := client.Set(fmt.Sprintf("key%d", i), "value", 0).Err() Expect(err).NotTo(HaveOccurred()) } wanted := []string{"keys=31", "keys=29", "keys=40"} for i, master := range cluster.masters() { Expect(master.Info().Val()).To(ContainSubstring(wanted[i])) } }) It("distributes keys when using EVAL", func() { script := redis.NewScript(` local r = redis.call('SET', KEYS[1], ARGV[1]) return r `) var key string for i := 0; i < 100; i++ { key = fmt.Sprintf("key%d", i) err := script.Run(client, []string{key}, "value").Err() Expect(err).NotTo(HaveOccurred()) } wanted := []string{"keys=31", "keys=29", "keys=40"} for i, master := range cluster.masters() { Expect(master.Info().Val()).To(ContainSubstring(wanted[i])) } }) It("supports Watch", func() { var incr func(string) error // Transactionally increments key using GET and SET commands. incr = func(key string) error { err := client.Watch(func(tx *redis.Tx) error { n, err := tx.Get(key).Int64() if err != nil && err != redis.Nil { return err } _, err = tx.Pipelined(func(pipe *redis.Pipeline) error { pipe.Set(key, strconv.FormatInt(n+1, 10), 0) return nil }) return err }, key) if err == redis.TxFailedErr { return incr(key) } return err } var wg sync.WaitGroup for i := 0; i < 100; i++ { wg.Add(1) go func() { defer GinkgoRecover() defer wg.Done() err := incr("key") Expect(err).NotTo(HaveOccurred()) }() } wg.Wait() n, err := client.Get("key").Int64() Expect(err).NotTo(HaveOccurred()) Expect(n).To(Equal(int64(100))) }) Describe("pipelining", func() { var pipe *redis.Pipeline assertPipeline := func() { keys := []string{"A", "B", "C", "D", "E", "F", "G"} It("follows redirects", func() { for _, key := range keys { slot := hashtag.Slot(key) client.SwapSlotNodes(slot) } for i, key := range keys { pipe.Set(key, key+"_value", 0) pipe.Expire(key, time.Duration(i+1)*time.Hour) } cmds, err := pipe.Exec() Expect(err).NotTo(HaveOccurred()) Expect(cmds).To(HaveLen(14)) if opt.RouteByLatency { return } for _, key := range keys { slot := hashtag.Slot(key) client.SwapSlotNodes(slot) } for _, key := range keys { pipe.Get(key) pipe.TTL(key) } cmds, err = pipe.Exec() Expect(err).NotTo(HaveOccurred()) Expect(cmds).To(HaveLen(14)) for i, key := range keys { get := cmds[i*2].(*redis.StringCmd) Expect(get.Val()).To(Equal(key + "_value")) ttl := cmds[(i*2)+1].(*redis.DurationCmd) Expect(ttl.Val()).To(BeNumerically("~", time.Duration(i+1)*time.Hour, time.Second)) } }) It("works with missing keys", func() { pipe.Set("A", "A_value", 0) pipe.Set("C", "C_value", 0) _, err := pipe.Exec() Expect(err).NotTo(HaveOccurred()) a := pipe.Get("A") b := pipe.Get("B") c := pipe.Get("C") cmds, err := pipe.Exec() Expect(err).To(Equal(redis.Nil)) Expect(cmds).To(HaveLen(3)) Expect(a.Err()).NotTo(HaveOccurred()) Expect(a.Val()).To(Equal("A_value")) Expect(b.Err()).To(Equal(redis.Nil)) Expect(b.Val()).To(Equal("")) Expect(c.Err()).NotTo(HaveOccurred()) Expect(c.Val()).To(Equal("C_value")) }) } Describe("Pipeline", func() { BeforeEach(func() { pipe = client.Pipeline() }) AfterEach(func() { Expect(pipe.Close()).NotTo(HaveOccurred()) }) assertPipeline() }) Describe("TxPipeline", func() { BeforeEach(func() { pipe = client.TxPipeline() }) AfterEach(func() { Expect(pipe.Close()).NotTo(HaveOccurred()) }) assertPipeline() }) }) It("calls fn for every master node", func() { for i := 0; i < 10; i++ { Expect(client.Set(strconv.Itoa(i), "", 0).Err()).NotTo(HaveOccurred()) } err := client.ForEachMaster(func(master *redis.Client) error { return master.FlushDb().Err() }) Expect(err).NotTo(HaveOccurred()) for _, client := range cluster.masters() { keys, err := client.Keys("*").Result() Expect(err).NotTo(HaveOccurred()) Expect(keys).To(HaveLen(0)) } }) } Describe("default ClusterClient", func() { BeforeEach(func() { opt = redisClusterOptions() client = cluster.clusterClient(opt) _ = client.ForEachMaster(func(master *redis.Client) error { return master.FlushDb().Err() }) }) AfterEach(func() { Expect(client.Close()).NotTo(HaveOccurred()) }) assertClusterClient() }) Describe("ClusterClient with RouteByLatency", func() { BeforeEach(func() { opt = redisClusterOptions() opt.RouteByLatency = true client = cluster.clusterClient(opt) _ = client.ForEachMaster(func(master *redis.Client) error { return master.FlushDb().Err() }) }) AfterEach(func() { client.FlushDb() Expect(client.Close()).NotTo(HaveOccurred()) }) assertClusterClient() }) }) var _ = Describe("ClusterClient without nodes", func() { var client *redis.ClusterClient BeforeEach(func() { client = redis.NewClusterClient(&redis.ClusterOptions{}) }) AfterEach(func() { Expect(client.Close()).NotTo(HaveOccurred()) }) It("returns an error", func() { err := client.Ping().Err() Expect(err).To(MatchError("redis: cluster has no nodes")) }) It("pipeline returns an error", func() { _, err := client.Pipelined(func(pipe *redis.Pipeline) error { pipe.Ping() return nil }) Expect(err).To(MatchError("redis: cluster has no nodes")) }) }) var _ = Describe("ClusterClient without valid nodes", func() { var client *redis.ClusterClient BeforeEach(func() { client = redis.NewClusterClient(&redis.ClusterOptions{ Addrs: []string{redisAddr}, }) }) AfterEach(func() { Expect(client.Close()).NotTo(HaveOccurred()) }) It("returns an error", func() { err := client.Ping().Err() Expect(err).To(MatchError("ERR This instance has cluster support disabled")) }) It("pipeline returns an error", func() { _, err := client.Pipelined(func(pipe *redis.Pipeline) error { pipe.Ping() return nil }) Expect(err).To(MatchError("ERR This instance has cluster support disabled")) }) }) var _ = Describe("ClusterClient timeout", func() { var client *redis.ClusterClient AfterEach(func() { _ = client.Close() }) testTimeout := func() { It("Ping timeouts", func() { err := client.Ping().Err() Expect(err).To(HaveOccurred()) Expect(err.(net.Error).Timeout()).To(BeTrue()) }) It("Pipeline timeouts", func() { _, err := client.Pipelined(func(pipe *redis.Pipeline) error { pipe.Ping() return nil }) Expect(err).To(HaveOccurred()) Expect(err.(net.Error).Timeout()).To(BeTrue()) }) It("Tx timeouts", func() { err := client.Watch(func(tx *redis.Tx) error { return tx.Ping().Err() }) Expect(err).To(HaveOccurred()) Expect(err.(net.Error).Timeout()).To(BeTrue()) }) It("Tx Pipeline timeouts", func() { err := client.Watch(func(tx *redis.Tx) error { _, err := tx.Pipelined(func(pipe *redis.Pipeline) error { pipe.Ping() return nil }) return err }) Expect(err).To(HaveOccurred()) Expect(err.(net.Error).Timeout()).To(BeTrue()) }) } Context("read timeout", func() { BeforeEach(func() { opt := redisClusterOptions() opt.ReadTimeout = time.Nanosecond opt.WriteTimeout = -1 client = cluster.clusterClient(opt) }) testTimeout() }) Context("write timeout", func() { BeforeEach(func() { opt := redisClusterOptions() opt.ReadTimeout = time.Nanosecond opt.WriteTimeout = -1 client = cluster.clusterClient(opt) }) testTimeout() }) Context("network timeout", func() { const pause = time.Second BeforeEach(func() { opt := redisClusterOptions() opt.ReadTimeout = 100 * time.Millisecond opt.WriteTimeout = 100 * time.Millisecond opt.MaxRedirects = 1 client = cluster.clusterClient(opt) err := client.ForEachNode(func(client *redis.Client) error { return client.ClientPause(pause).Err() }) Expect(err).NotTo(HaveOccurred()) }) AfterEach(func() { Eventually(func() error { return client.ForEachNode(func(client *redis.Client) error { return client.Ping().Err() }) }, 2*pause).ShouldNot(HaveOccurred()) }) testTimeout() }) }) //------------------------------------------------------------------------------ func BenchmarkRedisClusterPing(b *testing.B) { if testing.Short() { b.Skip("skipping in short mode") } cluster := &clusterScenario{ ports: []string{"8220", "8221", "8222", "8223", "8224", "8225"}, nodeIds: make([]string, 6), processes: make(map[string]*redisProcess, 6), clients: make(map[string]*redis.Client, 6), } if err := startCluster(cluster); err != nil { b.Fatal(err) } defer stopCluster(cluster) client := cluster.clusterClient(redisClusterOptions()) defer client.Close() b.ResetTimer() b.RunParallel(func(pb *testing.PB) { for pb.Next() { if err := client.Ping().Err(); err != nil { b.Fatal(err) } } }) }