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redis/cluster_test.go

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package redis_test
import (
"context"
"crypto/tls"
"errors"
"fmt"
"net"
"strconv"
"strings"
"sync"
"testing"
"time"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/stretchr/testify/assert"
"github.com/go-redis/redis/v9"
"github.com/go-redis/redis/v9/internal/hashtag"
)
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) addrs() []string {
addrs := make([]string, len(s.ports))
for i, port := range s.ports {
addrs[i] = net.JoinHostPort("127.0.0.1", port)
}
return addrs
}
func (s *clusterScenario) newClusterClientUnstable(opt *redis.ClusterOptions) *redis.ClusterClient {
opt.Addrs = s.addrs()
return redis.NewClusterClient(opt)
}
func (s *clusterScenario) newClusterClient(
ctx context.Context, opt *redis.ClusterOptions,
) *redis.ClusterClient {
client := s.newClusterClientUnstable(opt)
err := eventually(func() error {
if opt.ClusterSlots != nil {
return nil
}
state, err := client.LoadState(ctx)
if err != nil {
return err
}
if !state.IsConsistent(ctx) {
return fmt.Errorf("cluster state is not consistent")
}
return nil
}, 30*time.Second)
if err != nil {
panic(err)
}
return client
}
func (s *clusterScenario) Close() error {
for _, port := range s.ports {
if process, ok := processes[port]; ok {
process.Close()
delete(processes, port)
}
}
return nil
}
func startCluster(ctx context.Context, 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(ctx).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(ctx, "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(ctx, 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(ctx).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(ctx, masterID).Err()
if err != nil {
return err
}
}
// Wait until all nodes have consistent info.
wanted := []redis.ClusterSlot{{
Start: 0,
End: 4999,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8220",
}, {
ID: "",
Addr: "127.0.0.1:8223",
}},
}, {
Start: 5000,
End: 9999,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8221",
}, {
ID: "",
Addr: "127.0.0.1:8224",
}},
}, {
Start: 10000,
End: 16383,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8222",
}, {
ID: "",
Addr: "127.0.0.1:8225",
}},
}}
for _, client := range scenario.clients {
err := eventually(func() error {
res, err := client.ClusterSlots(ctx).Result()
if err != nil {
return err
}
return assertSlotsEqual(res, wanted)
}, 30*time.Second)
if err != nil {
return err
}
}
return nil
}
func assertSlotsEqual(slots, wanted []redis.ClusterSlot) error {
outerLoop:
for _, s2 := range wanted {
for _, s1 := range slots {
if slotEqual(s1, s2) {
continue outerLoop
}
}
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
}
//------------------------------------------------------------------------------
var _ = Describe("ClusterClient", func() {
var failover bool
var opt *redis.ClusterOptions
var client *redis.ClusterClient
assertClusterClient := func() {
It("should GET/SET/DEL", func() {
err := client.Get(ctx, "A").Err()
Expect(err).To(Equal(redis.Nil))
err = client.Set(ctx, "A", "VALUE", 0).Err()
Expect(err).NotTo(HaveOccurred())
Eventually(func() string {
return client.Get(ctx, "A").Val()
}, 30*time.Second).Should(Equal("VALUE"))
cnt, err := client.Del(ctx, "A").Result()
Expect(err).NotTo(HaveOccurred())
Expect(cnt).To(Equal(int64(1)))
})
It("GET follows redirects", func() {
err := client.Set(ctx, "A", "VALUE", 0).Err()
Expect(err).NotTo(HaveOccurred())
if !failover {
Eventually(func() int64 {
nodes, err := client.Nodes(ctx, "A")
if err != nil {
return 0
}
return nodes[1].Client.DBSize(ctx).Val()
}, 30*time.Second).Should(Equal(int64(1)))
Eventually(func() error {
return client.SwapNodes(ctx, "A")
}, 30*time.Second).ShouldNot(HaveOccurred())
}
v, err := client.Get(ctx, "A").Result()
Expect(err).NotTo(HaveOccurred())
Expect(v).To(Equal("VALUE"))
})
It("SET follows redirects", func() {
if !failover {
Eventually(func() error {
return client.SwapNodes(ctx, "A")
}, 30*time.Second).ShouldNot(HaveOccurred())
}
err := client.Set(ctx, "A", "VALUE", 0).Err()
Expect(err).NotTo(HaveOccurred())
v, err := client.Get(ctx, "A").Result()
Expect(err).NotTo(HaveOccurred())
Expect(v).To(Equal("VALUE"))
})
It("distributes keys", func() {
for i := 0; i < 100; i++ {
err := client.Set(ctx, fmt.Sprintf("key%d", i), "value", 0).Err()
Expect(err).NotTo(HaveOccurred())
}
client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
defer GinkgoRecover()
Eventually(func() string {
return master.Info(ctx, "keyspace").Val()
}, 30*time.Second).Should(Or(
ContainSubstring("keys=31"),
ContainSubstring("keys=29"),
ContainSubstring("keys=40"),
))
return nil
})
})
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(ctx, client, []string{key}, "value").Err()
Expect(err).NotTo(HaveOccurred())
}
client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
defer GinkgoRecover()
Eventually(func() string {
return master.Info(ctx, "keyspace").Val()
}, 30*time.Second).Should(Or(
ContainSubstring("keys=31"),
ContainSubstring("keys=29"),
ContainSubstring("keys=40"),
))
return nil
})
})
It("distributes scripts when using Script Load", func() {
client.ScriptFlush(ctx)
script := redis.NewScript(`return 'Unique script'`)
script.Load(ctx, client)
client.ForEachShard(ctx, func(ctx context.Context, shard *redis.Client) error {
defer GinkgoRecover()
val, _ := script.Exists(ctx, shard).Result()
Expect(val[0]).To(Equal(true))
return nil
})
})
It("checks all shards when using Script Exists", func() {
client.ScriptFlush(ctx)
script := redis.NewScript(`return 'First script'`)
lostScriptSrc := `return 'Lost script'`
lostScript := redis.NewScript(lostScriptSrc)
script.Load(ctx, client)
client.Do(ctx, "script", "load", lostScriptSrc)
val, _ := client.ScriptExists(ctx, script.Hash(), lostScript.Hash()).Result()
Expect(val).To(Equal([]bool{true, false}))
})
It("flushes scripts from all shards when using ScriptFlush", func() {
script := redis.NewScript(`return 'Unnecessary script'`)
script.Load(ctx, client)
val, _ := client.ScriptExists(ctx, script.Hash()).Result()
Expect(val).To(Equal([]bool{true}))
client.ScriptFlush(ctx)
val, _ = client.ScriptExists(ctx, script.Hash()).Result()
Expect(val).To(Equal([]bool{false}))
})
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(ctx, func(tx *redis.Tx) error {
n, err := tx.Get(ctx, key).Int64()
if err != nil && err != redis.Nil {
return err
}
_, err = tx.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Set(ctx, 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()
Eventually(func() string {
return client.Get(ctx, "key").Val()
}, 30*time.Second).Should(Equal("100"))
})
Describe("pipelining", func() {
var pipe *redis.Pipeline
assertPipeline := func() {
keys := []string{"A", "B", "C", "D", "E", "F", "G"}
It("follows redirects", func() {
if !failover {
for _, key := range keys {
Eventually(func() error {
return client.SwapNodes(ctx, key)
}, 30*time.Second).ShouldNot(HaveOccurred())
}
}
for i, key := range keys {
pipe.Set(ctx, key, key+"_value", 0)
pipe.Expire(ctx, key, time.Duration(i+1)*time.Hour)
}
cmds, err := pipe.Exec(ctx)
Expect(err).NotTo(HaveOccurred())
Expect(cmds).To(HaveLen(14))
_ = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
defer GinkgoRecover()
Eventually(func() int64 {
return node.DBSize(ctx).Val()
}, 30*time.Second).ShouldNot(BeZero())
return nil
})
if !failover {
for _, key := range keys {
Eventually(func() error {
return client.SwapNodes(ctx, key)
}, 30*time.Second).ShouldNot(HaveOccurred())
}
}
for _, key := range keys {
pipe.Get(ctx, key)
pipe.TTL(ctx, key)
}
cmds, err = pipe.Exec(ctx)
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)
dur := time.Duration(i+1) * time.Hour
Expect(ttl.Val()).To(BeNumerically("~", dur, 30*time.Second))
}
})
It("works with missing keys", func() {
pipe.Set(ctx, "A", "A_value", 0)
pipe.Set(ctx, "C", "C_value", 0)
_, err := pipe.Exec(ctx)
Expect(err).NotTo(HaveOccurred())
a := pipe.Get(ctx, "A")
b := pipe.Get(ctx, "B")
c := pipe.Get(ctx, "C")
cmds, err := pipe.Exec(ctx)
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("with Pipeline", func() {
BeforeEach(func() {
pipe = client.Pipeline().(*redis.Pipeline)
})
AfterEach(func() {})
assertPipeline()
})
Describe("with TxPipeline", func() {
BeforeEach(func() {
pipe = client.TxPipeline().(*redis.Pipeline)
})
AfterEach(func() {})
assertPipeline()
})
})
It("supports PubSub", func() {
pubsub := client.Subscribe(ctx, "mychannel")
defer pubsub.Close()
Eventually(func() error {
_, err := client.Publish(ctx, "mychannel", "hello").Result()
if err != nil {
return err
}
msg, err := pubsub.ReceiveTimeout(ctx, time.Second)
if err != nil {
return err
}
_, ok := msg.(*redis.Message)
if !ok {
return fmt.Errorf("got %T, wanted *redis.Message", msg)
}
return nil
}, 30*time.Second).ShouldNot(HaveOccurred())
})
It("supports sharded PubSub", func() {
pubsub := client.SSubscribe(ctx, "mychannel")
defer pubsub.Close()
Eventually(func() error {
_, err := client.SPublish(ctx, "mychannel", "hello").Result()
if err != nil {
return err
}
msg, err := pubsub.ReceiveTimeout(ctx, time.Second)
if err != nil {
return err
}
_, ok := msg.(*redis.Message)
if !ok {
return fmt.Errorf("got %T, wanted *redis.Message", msg)
}
return nil
}, 30*time.Second).ShouldNot(HaveOccurred())
})
It("supports PubSub.Ping without channels", func() {
pubsub := client.Subscribe(ctx)
defer pubsub.Close()
err := pubsub.Ping(ctx)
Expect(err).NotTo(HaveOccurred())
})
}
Describe("ClusterClient", func() {
BeforeEach(func() {
opt = redisClusterOptions()
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
_ = client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(client.Close()).NotTo(HaveOccurred())
})
It("returns pool stats", func() {
stats := client.PoolStats()
Expect(stats).To(BeAssignableToTypeOf(&redis.PoolStats{}))
})
It("returns an error when there are no attempts left", func() {
opt := redisClusterOptions()
opt.MaxRedirects = -1
client := cluster.newClusterClient(ctx, opt)
Eventually(func() error {
return client.SwapNodes(ctx, "A")
}, 30*time.Second).ShouldNot(HaveOccurred())
err := client.Get(ctx, "A").Err()
Expect(err).To(HaveOccurred())
Expect(err.Error()).To(ContainSubstring("MOVED"))
Expect(client.Close()).NotTo(HaveOccurred())
})
It("calls fn for every master node", func() {
for i := 0; i < 10; i++ {
Expect(client.Set(ctx, strconv.Itoa(i), "", 0).Err()).NotTo(HaveOccurred())
}
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
size, err := client.DBSize(ctx).Result()
Expect(err).NotTo(HaveOccurred())
Expect(size).To(Equal(int64(0)))
})
It("should CLUSTER SLOTS", func() {
res, err := client.ClusterSlots(ctx).Result()
Expect(err).NotTo(HaveOccurred())
Expect(res).To(HaveLen(3))
wanted := []redis.ClusterSlot{{
Start: 0,
End: 4999,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8220",
}, {
ID: "",
Addr: "127.0.0.1:8223",
}},
}, {
Start: 5000,
End: 9999,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8221",
}, {
ID: "",
Addr: "127.0.0.1:8224",
}},
}, {
Start: 10000,
End: 16383,
Nodes: []redis.ClusterNode{{
ID: "",
Addr: "127.0.0.1:8222",
}, {
ID: "",
Addr: "127.0.0.1:8225",
}},
}}
Expect(assertSlotsEqual(res, wanted)).NotTo(HaveOccurred())
})
It("should CLUSTER NODES", func() {
res, err := client.ClusterNodes(ctx).Result()
Expect(err).NotTo(HaveOccurred())
Expect(len(res)).To(BeNumerically(">", 400))
})
It("should CLUSTER INFO", func() {
res, err := client.ClusterInfo(ctx).Result()
Expect(err).NotTo(HaveOccurred())
Expect(res).To(ContainSubstring("cluster_known_nodes:6"))
})
It("should CLUSTER KEYSLOT", func() {
hashSlot, err := client.ClusterKeySlot(ctx, "somekey").Result()
Expect(err).NotTo(HaveOccurred())
Expect(hashSlot).To(Equal(int64(hashtag.Slot("somekey"))))
})
It("should CLUSTER GETKEYSINSLOT", func() {
keys, err := client.ClusterGetKeysInSlot(ctx, hashtag.Slot("somekey"), 1).Result()
Expect(err).NotTo(HaveOccurred())
Expect(len(keys)).To(Equal(0))
})
It("should CLUSTER COUNT-FAILURE-REPORTS", func() {
n, err := client.ClusterCountFailureReports(ctx, cluster.nodeIDs[0]).Result()
Expect(err).NotTo(HaveOccurred())
Expect(n).To(Equal(int64(0)))
})
It("should CLUSTER COUNTKEYSINSLOT", func() {
n, err := client.ClusterCountKeysInSlot(ctx, 10).Result()
Expect(err).NotTo(HaveOccurred())
Expect(n).To(Equal(int64(0)))
})
It("should CLUSTER SAVECONFIG", func() {
res, err := client.ClusterSaveConfig(ctx).Result()
Expect(err).NotTo(HaveOccurred())
Expect(res).To(Equal("OK"))
})
It("should CLUSTER SLAVES", func() {
nodesList, err := client.ClusterSlaves(ctx, cluster.nodeIDs[0]).Result()
Expect(err).NotTo(HaveOccurred())
Expect(nodesList).Should(ContainElement(ContainSubstring("slave")))
Expect(nodesList).Should(HaveLen(1))
})
It("should RANDOMKEY", func() {
const nkeys = 100
for i := 0; i < nkeys; i++ {
err := client.Set(ctx, fmt.Sprintf("key%d", i), "value", 0).Err()
Expect(err).NotTo(HaveOccurred())
}
var keys []string
addKey := func(key string) {
for _, k := range keys {
if k == key {
return
}
}
keys = append(keys, key)
}
for i := 0; i < nkeys*10; i++ {
key := client.RandomKey(ctx).Val()
addKey(key)
}
Expect(len(keys)).To(BeNumerically("~", nkeys, nkeys/10))
})
It("supports Process hook", func() {
err := client.Ping(ctx).Err()
Expect(err).NotTo(HaveOccurred())
err = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
return node.Ping(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
var stack []string
clusterHook := &hook{
beforeProcess: func(ctx context.Context, cmd redis.Cmder) (context.Context, error) {
Expect(cmd.String()).To(Equal("ping: "))
stack = append(stack, "cluster.BeforeProcess")
return ctx, nil
},
afterProcess: func(ctx context.Context, cmd redis.Cmder) error {
Expect(cmd.String()).To(Equal("ping: PONG"))
stack = append(stack, "cluster.AfterProcess")
return nil
},
}
client.AddHook(clusterHook)
nodeHook := &hook{
beforeProcess: func(ctx context.Context, cmd redis.Cmder) (context.Context, error) {
Expect(cmd.String()).To(Equal("ping: "))
stack = append(stack, "shard.BeforeProcess")
return ctx, nil
},
afterProcess: func(ctx context.Context, cmd redis.Cmder) error {
Expect(cmd.String()).To(Equal("ping: PONG"))
stack = append(stack, "shard.AfterProcess")
return nil
},
}
_ = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
node.AddHook(nodeHook)
return nil
})
err = client.Ping(ctx).Err()
Expect(err).NotTo(HaveOccurred())
Expect(stack).To(Equal([]string{
"cluster.BeforeProcess",
"shard.BeforeProcess",
"shard.AfterProcess",
"cluster.AfterProcess",
}))
clusterHook.beforeProcess = nil
clusterHook.afterProcess = nil
nodeHook.beforeProcess = nil
nodeHook.afterProcess = nil
})
It("supports Pipeline hook", func() {
err := client.Ping(ctx).Err()
Expect(err).NotTo(HaveOccurred())
err = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
return node.Ping(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
var stack []string
client.AddHook(&hook{
beforeProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
Expect(cmds).To(HaveLen(1))
Expect(cmds[0].String()).To(Equal("ping: "))
stack = append(stack, "cluster.BeforeProcessPipeline")
return ctx, nil
},
afterProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) error {
Expect(cmds).To(HaveLen(1))
Expect(cmds[0].String()).To(Equal("ping: PONG"))
stack = append(stack, "cluster.AfterProcessPipeline")
return nil
},
})
_ = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
node.AddHook(&hook{
beforeProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
Expect(cmds).To(HaveLen(1))
Expect(cmds[0].String()).To(Equal("ping: "))
stack = append(stack, "shard.BeforeProcessPipeline")
return ctx, nil
},
afterProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) error {
Expect(cmds).To(HaveLen(1))
Expect(cmds[0].String()).To(Equal("ping: PONG"))
stack = append(stack, "shard.AfterProcessPipeline")
return nil
},
})
return nil
})
_, err = client.Pipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
return nil
})
Expect(err).NotTo(HaveOccurred())
Expect(stack).To(Equal([]string{
"cluster.BeforeProcessPipeline",
"shard.BeforeProcessPipeline",
"shard.AfterProcessPipeline",
"cluster.AfterProcessPipeline",
}))
})
It("supports TxPipeline hook", func() {
err := client.Ping(ctx).Err()
Expect(err).NotTo(HaveOccurred())
err = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
return node.Ping(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
var stack []string
client.AddHook(&hook{
beforeProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
Expect(cmds).To(HaveLen(3))
Expect(cmds[1].String()).To(Equal("ping: "))
stack = append(stack, "cluster.BeforeProcessPipeline")
return ctx, nil
},
afterProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) error {
Expect(cmds).To(HaveLen(3))
Expect(cmds[1].String()).To(Equal("ping: PONG"))
stack = append(stack, "cluster.AfterProcessPipeline")
return nil
},
})
_ = client.ForEachShard(ctx, func(ctx context.Context, node *redis.Client) error {
node.AddHook(&hook{
beforeProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) (context.Context, error) {
Expect(cmds).To(HaveLen(3))
Expect(cmds[1].String()).To(Equal("ping: "))
stack = append(stack, "shard.BeforeProcessPipeline")
return ctx, nil
},
afterProcessPipeline: func(ctx context.Context, cmds []redis.Cmder) error {
Expect(cmds).To(HaveLen(3))
Expect(cmds[1].String()).To(Equal("ping: PONG"))
stack = append(stack, "shard.AfterProcessPipeline")
return nil
},
})
return nil
})
_, err = client.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
return nil
})
Expect(err).NotTo(HaveOccurred())
Expect(stack).To(Equal([]string{
"cluster.BeforeProcessPipeline",
"shard.BeforeProcessPipeline",
"shard.AfterProcessPipeline",
"cluster.AfterProcessPipeline",
}))
})
It("should return correct replica for key", func() {
client, err := client.SlaveForKey(ctx, "test")
Expect(err).ToNot(HaveOccurred())
info := client.Info(ctx, "server")
Expect(info.Val()).Should(ContainSubstring("tcp_port:8224"))
})
It("should return correct master for key", func() {
client, err := client.MasterForKey(ctx, "test")
Expect(err).ToNot(HaveOccurred())
info := client.Info(ctx, "server")
Expect(info.Val()).Should(ContainSubstring("tcp_port:8221"))
})
assertClusterClient()
})
Describe("ClusterClient with RouteByLatency", func() {
BeforeEach(func() {
opt = redisClusterOptions()
opt.RouteByLatency = true
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
err = client.ForEachSlave(ctx, func(ctx context.Context, slave *redis.Client) error {
Eventually(func() int64 {
return client.DBSize(ctx).Val()
}, 30*time.Second).Should(Equal(int64(0)))
return nil
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
err := client.ForEachSlave(ctx, func(ctx context.Context, slave *redis.Client) error {
return slave.ReadWrite(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
err = client.Close()
Expect(err).NotTo(HaveOccurred())
})
assertClusterClient()
})
Describe("ClusterClient with ClusterSlots", func() {
BeforeEach(func() {
failover = true
opt = redisClusterOptions()
opt.ClusterSlots = func(ctx context.Context) ([]redis.ClusterSlot, error) {
slots := []redis.ClusterSlot{{
Start: 0,
End: 4999,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard1Port,
}},
}, {
Start: 5000,
End: 9999,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard2Port,
}},
}, {
Start: 10000,
End: 16383,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard3Port,
}},
}}
return slots, nil
}
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
err = client.ForEachSlave(ctx, func(ctx context.Context, slave *redis.Client) error {
Eventually(func() int64 {
return client.DBSize(ctx).Val()
}, 30*time.Second).Should(Equal(int64(0)))
return nil
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
failover = false
err := client.Close()
Expect(err).NotTo(HaveOccurred())
})
assertClusterClient()
})
Describe("ClusterClient with RouteRandomly and ClusterSlots", func() {
BeforeEach(func() {
failover = true
opt = redisClusterOptions()
opt.RouteRandomly = true
opt.ClusterSlots = func(ctx context.Context) ([]redis.ClusterSlot, error) {
slots := []redis.ClusterSlot{{
Start: 0,
End: 4999,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard1Port,
}},
}, {
Start: 5000,
End: 9999,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard2Port,
}},
}, {
Start: 10000,
End: 16383,
Nodes: []redis.ClusterNode{{
Addr: ":" + ringShard3Port,
}},
}}
return slots, nil
}
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
err = client.ForEachSlave(ctx, func(ctx context.Context, slave *redis.Client) error {
Eventually(func() int64 {
return client.DBSize(ctx).Val()
}, 30*time.Second).Should(Equal(int64(0)))
return nil
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
failover = false
err := client.Close()
Expect(err).NotTo(HaveOccurred())
})
assertClusterClient()
})
Describe("ClusterClient with ClusterSlots with multiple nodes per slot", func() {
BeforeEach(func() {
failover = true
opt = redisClusterOptions()
opt.ReadOnly = true
opt.ClusterSlots = func(ctx context.Context) ([]redis.ClusterSlot, error) {
slots := []redis.ClusterSlot{{
Start: 0,
End: 4999,
Nodes: []redis.ClusterNode{{
Addr: ":8220",
}, {
Addr: ":8223",
}},
}, {
Start: 5000,
End: 9999,
Nodes: []redis.ClusterNode{{
Addr: ":8221",
}, {
Addr: ":8224",
}},
}, {
Start: 10000,
End: 16383,
Nodes: []redis.ClusterNode{{
Addr: ":8222",
}, {
Addr: ":8225",
}},
}}
return slots, nil
}
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachMaster(ctx, func(ctx context.Context, master *redis.Client) error {
return master.FlushDB(ctx).Err()
})
Expect(err).NotTo(HaveOccurred())
err = client.ForEachSlave(ctx, func(ctx context.Context, slave *redis.Client) error {
Eventually(func() int64 {
return client.DBSize(ctx).Val()
}, 30*time.Second).Should(Equal(int64(0)))
return nil
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
failover = false
err := client.Close()
Expect(err).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("Ping returns an error", func() {
err := client.Ping(ctx).Err()
Expect(err).To(MatchError("redis: cluster has no nodes"))
})
It("pipeline returns an error", func() {
_, err := client.Pipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
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(ctx).Err()
Expect(err).To(MatchError("ERR This instance has cluster support disabled"))
})
It("pipeline returns an error", func() {
_, err := client.Pipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
return nil
})
Expect(err).To(MatchError("ERR This instance has cluster support disabled"))
})
})
var _ = Describe("ClusterClient with unavailable Cluster", func() {
var client *redis.ClusterClient
BeforeEach(func() {
opt := redisClusterOptions()
opt.ReadTimeout = 250 * time.Millisecond
opt.WriteTimeout = 250 * time.Millisecond
opt.MaxRedirects = 1
client = cluster.newClusterClientUnstable(opt)
Expect(client.Ping(ctx).Err()).NotTo(HaveOccurred())
for _, node := range cluster.clients {
err := node.ClientPause(ctx, 5*time.Second).Err()
Expect(err).NotTo(HaveOccurred())
}
})
AfterEach(func() {
Expect(client.Close()).NotTo(HaveOccurred())
})
It("recovers when Cluster recovers", func() {
err := client.Ping(ctx).Err()
Expect(err).To(HaveOccurred())
Eventually(func() error {
return client.Ping(ctx).Err()
}, "30s").ShouldNot(HaveOccurred())
})
})
var _ = Describe("ClusterClient timeout", func() {
var client *redis.ClusterClient
AfterEach(func() {
_ = client.Close()
})
testTimeout := func() {
It("Ping timeouts", func() {
err := client.Ping(ctx).Err()
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
It("Pipeline timeouts", func() {
_, err := client.Pipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
return nil
})
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
It("Tx timeouts", func() {
err := client.Watch(ctx, func(tx *redis.Tx) error {
return tx.Ping(ctx).Err()
}, "foo")
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
It("Tx Pipeline timeouts", func() {
err := client.Watch(ctx, func(tx *redis.Tx) error {
_, err := tx.TxPipelined(ctx, func(pipe redis.Pipeliner) error {
pipe.Ping(ctx)
return nil
})
return err
}, "foo")
Expect(err).To(HaveOccurred())
Expect(err.(net.Error).Timeout()).To(BeTrue())
})
}
const pause = 5 * time.Second
Context("read/write timeout", func() {
BeforeEach(func() {
opt := redisClusterOptions()
opt.ReadTimeout = 250 * time.Millisecond
opt.WriteTimeout = 250 * time.Millisecond
opt.MaxRedirects = 1
client = cluster.newClusterClient(ctx, opt)
err := client.ForEachShard(ctx, func(ctx context.Context, client *redis.Client) error {
return client.ClientPause(ctx, pause).Err()
})
Expect(err).NotTo(HaveOccurred())
})
AfterEach(func() {
_ = client.ForEachShard(ctx, func(ctx context.Context, client *redis.Client) error {
defer GinkgoRecover()
Eventually(func() error {
return client.Ping(ctx).Err()
}, 2*pause).ShouldNot(HaveOccurred())
return nil
})
})
testTimeout()
})
})
func TestParseClusterURL(t *testing.T) {
cases := []struct {
test string
url string
o *redis.ClusterOptions // expected value
err error
}{
{
test: "ParseRedisURL",
url: "redis://localhost:123",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}},
}, {
test: "ParseRedissURL",
url: "rediss://localhost:123",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, TLSConfig: &tls.Config{ServerName: "localhost"}},
}, {
test: "MissingRedisPort",
url: "redis://localhost",
o: &redis.ClusterOptions{Addrs: []string{"localhost:6379"}},
}, {
test: "MissingRedissPort",
url: "rediss://localhost",
o: &redis.ClusterOptions{Addrs: []string{"localhost:6379"}, TLSConfig: &tls.Config{ServerName: "localhost"}},
}, {
test: "MultipleRedisURLs",
url: "redis://localhost:123?addr=localhost:1234&addr=localhost:12345",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123", "localhost:1234", "localhost:12345"}},
}, {
test: "MultipleRedissURLs",
url: "rediss://localhost:123?addr=localhost:1234&addr=localhost:12345",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123", "localhost:1234", "localhost:12345"}, TLSConfig: &tls.Config{ServerName: "localhost"}},
}, {
test: "OnlyPassword",
url: "redis://:bar@localhost:123",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, Password: "bar"},
}, {
test: "OnlyUser",
url: "redis://foo@localhost:123",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, Username: "foo"},
}, {
test: "RedisUsernamePassword",
url: "redis://foo:bar@localhost:123",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, Username: "foo", Password: "bar"},
}, {
test: "RedissUsernamePassword",
url: "rediss://foo:bar@localhost:123?addr=localhost:1234",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123", "localhost:1234"}, Username: "foo", Password: "bar", TLSConfig: &tls.Config{ServerName: "localhost"}},
}, {
test: "QueryParameters",
url: "redis://localhost:123?read_timeout=2&pool_fifo=true&addr=localhost:1234",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123", "localhost:1234"}, ReadTimeout: 2 * time.Second, PoolFIFO: true},
}, {
test: "DisabledTimeout",
url: "redis://localhost:123?idle_timeout=0",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, ConnMaxIdleTime: -1},
}, {
test: "DisabledTimeoutNeg",
url: "redis://localhost:123?idle_timeout=-1",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, ConnMaxIdleTime: -1},
}, {
test: "UseDefault",
url: "redis://localhost:123?idle_timeout=",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, ConnMaxIdleTime: 0},
}, {
test: "UseDefaultMissing=",
url: "redis://localhost:123?idle_timeout",
o: &redis.ClusterOptions{Addrs: []string{"localhost:123"}, ConnMaxIdleTime: 0},
}, {
test: "InvalidQueryAddr",
url: "rediss://foo:bar@localhost:123?addr=rediss://foo:barr@localhost:1234",
err: errors.New(`redis: unable to parse addr param: rediss://foo:barr@localhost:1234`),
}, {
test: "InvalidInt",
url: "redis://localhost?pool_size=five",
err: errors.New(`redis: invalid pool_size number: strconv.Atoi: parsing "five": invalid syntax`),
}, {
test: "InvalidBool",
url: "redis://localhost?pool_fifo=yes",
err: errors.New(`redis: invalid pool_fifo boolean: expected true/false/1/0 or an empty string, got "yes"`),
}, {
test: "UnknownParam",
url: "redis://localhost?abc=123",
err: errors.New("redis: unexpected option: abc"),
}, {
test: "InvalidScheme",
url: "https://google.com",
err: errors.New("redis: invalid URL scheme: https"),
},
}
for i := range cases {
tc := cases[i]
t.Run(tc.test, func(t *testing.T) {
t.Parallel()
actual, err := redis.ParseClusterURL(tc.url)
if tc.err == nil && err != nil {
t.Fatalf("unexpected error: %q", err)
return
}
if tc.err != nil && err == nil {
t.Fatalf("expected error: got %+v", actual)
return
}
if tc.err != nil && err != nil {
if tc.err.Error() != err.Error() {
t.Fatalf("got %q, expected %q", err, tc.err)
}
return
}
comprareOptions(t, actual, tc.o)
})
}
}
func comprareOptions(t *testing.T, actual, expected *redis.ClusterOptions) {
t.Helper()
assert.Equal(t, expected.Addrs, actual.Addrs)
assert.Equal(t, expected.TLSConfig, actual.TLSConfig)
assert.Equal(t, expected.Username, actual.Username)
assert.Equal(t, expected.Password, actual.Password)
assert.Equal(t, expected.MaxRetries, actual.MaxRetries)
assert.Equal(t, expected.MinRetryBackoff, actual.MinRetryBackoff)
assert.Equal(t, expected.MaxRetryBackoff, actual.MaxRetryBackoff)
assert.Equal(t, expected.DialTimeout, actual.DialTimeout)
assert.Equal(t, expected.ReadTimeout, actual.ReadTimeout)
assert.Equal(t, expected.WriteTimeout, actual.WriteTimeout)
assert.Equal(t, expected.PoolFIFO, actual.PoolFIFO)
assert.Equal(t, expected.PoolSize, actual.PoolSize)
assert.Equal(t, expected.MinIdleConns, actual.MinIdleConns)
assert.Equal(t, expected.ConnMaxLifetime, actual.ConnMaxLifetime)
assert.Equal(t, expected.ConnMaxIdleTime, actual.ConnMaxIdleTime)
assert.Equal(t, expected.PoolTimeout, actual.PoolTimeout)
}
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