feat: add connection timeout configuration for Redis operations

README.md

@@ -54,6 +54,7 @@
 - [Local Cache](#local-cache)
 - [Redis](#redis)
   - [Redis type](#redis-type)
+  - [Connection Timeout](#connection-timeout)
   - [Pipelining](#pipelining)
   - [One Redis Instance](#one-redis-instance)
   - [Two Redis Instances](#two-redis-instances)
@@ -1113,6 +1114,13 @@ The deployment type can be specified with the `REDIS_TYPE` / `REDIS_PERSECOND_TY
 1. "sentinel": A comma separated list with the first string as the master name of the sentinel cluster followed by hostname:port pairs. The list size should be >= 2. The first item is the name of the master and the rest are the sentinels.
 1. "cluster": A comma separated list of hostname:port pairs with all the nodes in the cluster.
 
+## Connection Timeout
+
+Connection timeout controls the maximum duration for Redis connection establishment, read operations, and write operations.
+
+1. `REDIS_TIMEOUT`: sets the timeout for Redis connection and I/O operations. Default: `10s`
+1. `REDIS_PERSECOND_TIMEOUT`: sets the timeout for per-second Redis connection and I/O operations. Default: `10s`
+
 ## Pipelining
 
 By default, for each request, ratelimit will pick up a connection from pool, write multiple redis commands in a single write then reads their responses in a single read. This reduces network delay.

src/redis/cache_impl.go

@@ -18,12 +18,12 @@ func NewRateLimiterCacheImplFromSettings(s settings.Settings, localCache *freeca
 	var perSecondPool Client
 	if s.RedisPerSecond {
 		perSecondPool = NewClientImpl(srv.Scope().Scope("redis_per_second_pool"), s.RedisPerSecondTls, s.RedisPerSecondAuth, s.RedisPerSecondSocketType,
-			s.RedisPerSecondType, s.RedisPerSecondUrl, s.RedisPerSecondPoolSize, s.RedisPerSecondPipelineWindow, s.RedisPerSecondPipelineLimit, s.RedisTlsConfig, s.RedisHealthCheckActiveConnection, srv)
+			s.RedisPerSecondType, s.RedisPerSecondUrl, s.RedisPerSecondPoolSize, s.RedisPerSecondPipelineWindow, s.RedisPerSecondPipelineLimit, s.RedisTlsConfig, s.RedisHealthCheckActiveConnection, srv, s.RedisPerSecondTimeout)
 		closer.Closers = append(closer.Closers, perSecondPool)
 	}
 
 	otherPool := NewClientImpl(srv.Scope().Scope("redis_pool"), s.RedisTls, s.RedisAuth, s.RedisSocketType, s.RedisType, s.RedisUrl, s.RedisPoolSize,
-		s.RedisPipelineWindow, s.RedisPipelineLimit, s.RedisTlsConfig, s.RedisHealthCheckActiveConnection, srv)
+		s.RedisPipelineWindow, s.RedisPipelineLimit, s.RedisTlsConfig, s.RedisHealthCheckActiveConnection, srv, s.RedisTimeout)
 	closer.Closers = append(closer.Closers, otherPool)
 
 	return NewFixedRateLimitCacheImpl(

src/redis/driver_impl.go

@@ -72,13 +72,16 @@ func checkError(err error) {
 
 func NewClientImpl(scope stats.Scope, useTls bool, auth, redisSocketType, redisType, url string, poolSize int,
 	pipelineWindow time.Duration, pipelineLimit int, tlsConfig *tls.Config, healthCheckActiveConnection bool, srv server.Server,
+	timeout time.Duration,
 ) Client {
 	maskedUrl := utils.MaskCredentialsInUrl(url)
 	logger.Warnf("connecting to redis on %s with pool size %d", maskedUrl, poolSize)
 
 	df := func(network, addr string) (radix.Conn, error) {
 		var dialOpts []radix.DialOpt
 
+		dialOpts = append(dialOpts, radix.DialTimeout(timeout))
+
 		if useTls {
 			dialOpts = append(dialOpts, radix.DialUseTLS(tlsConfig))
 		}

src/settings/settings.go

@@ -159,6 +159,10 @@ type Settings struct {
 	RedisPerSecondPipelineLimit int `envconfig:"REDIS_PERSECOND_PIPELINE_LIMIT" default:"0"`
 	// Enable healthcheck to check Redis Connection. If there is no active connection, healthcheck failed.
 	RedisHealthCheckActiveConnection bool `envconfig:"REDIS_HEALTH_CHECK_ACTIVE_CONNECTION" default:"false"`
+	// RedisTimeout sets the timeout for Redis connection and I/O operations.
+	RedisTimeout time.Duration `envconfig:"REDIS_TIMEOUT" default:"10s"`
+	// RedisPerSecondTimeout sets the timeout for per-second Redis connection and I/O operations.
+	RedisPerSecondTimeout time.Duration `envconfig:"REDIS_PERSECOND_TIMEOUT" default:"10s"`
 	// Memcache settings
 	MemcacheHostPort []string `envconfig:"MEMCACHE_HOST_PORT" default:""`
 	// MemcacheMaxIdleConns sets the maximum number of idle TCP connections per memcached node.

test/redis/bench_test.go

@@ -44,7 +44,7 @@ func BenchmarkParallelDoLimit(b *testing.B) {
 		return func(b *testing.B) {
 			statsStore := gostats.NewStore(gostats.NewNullSink(), false)
 			sm := stats.NewMockStatManager(statsStore)
-			client := redis.NewClientImpl(statsStore, false, "", "tcp", "single", "127.0.0.1:6379", poolSize, pipelineWindow, pipelineLimit, nil, false, nil)
+			client := redis.NewClientImpl(statsStore, false, "", "tcp", "single", "127.0.0.1:6379", poolSize, pipelineWindow, pipelineLimit, nil, false, nil, 10*time.Second)
 			defer client.Close()
 
 			cache := redis.NewFixedRateLimitCacheImpl(client, nil, utils.NewTimeSourceImpl(), rand.New(utils.NewLockedSource(time.Now().Unix())), 10, nil, 0.8, "", sm, true)

test/redis/driver_impl_test.go

@@ -38,7 +38,7 @@ func testNewClientImpl(t *testing.T, pipelineWindow time.Duration, pipelineLimit
 		statsStore := stats.NewStore(stats.NewNullSink(), false)
 
 		mkRedisClient := func(auth, addr string) redis.Client {
-			return redis.NewClientImpl(statsStore, false, auth, "tcp", "single", addr, 1, pipelineWindow, pipelineLimit, nil, false, nil)
+			return redis.NewClientImpl(statsStore, false, auth, "tcp", "single", addr, 1, pipelineWindow, pipelineLimit, nil, false, nil, 10*time.Second)
 		}
 
 		t.Run("connection refused", func(t *testing.T) {
@@ -131,7 +131,7 @@ func TestDoCmd(t *testing.T) {
 	statsStore := stats.NewStore(stats.NewNullSink(), false)
 
 	mkRedisClient := func(addr string) redis.Client {
-		return redis.NewClientImpl(statsStore, false, "", "tcp", "single", addr, 1, 0, 0, nil, false, nil)
+		return redis.NewClientImpl(statsStore, false, "", "tcp", "single", addr, 1, 0, 0, nil, false, nil, 10*time.Second)
 	}
 
 	t.Run("SETGET ok", func(t *testing.T) {
@@ -176,7 +176,7 @@ func testPipeDo(t *testing.T, pipelineWindow time.Duration, pipelineLimit int) f
 		statsStore := stats.NewStore(stats.NewNullSink(), false)
 
 		mkRedisClient := func(addr string) redis.Client {
-			return redis.NewClientImpl(statsStore, false, "", "tcp", "single", addr, 1, pipelineWindow, pipelineLimit, nil, false, nil)
+			return redis.NewClientImpl(statsStore, false, "", "tcp", "single", addr, 1, pipelineWindow, pipelineLimit, nil, false, nil, 10*time.Second)
 		}
 
 		t.Run("SETGET ok", func(t *testing.T) {