adding IdleTimeout with the redis-connection-idle-timeout flag, to ke… (#1691)

* adding IdleTimeout with the redis-connection-idle-timeout flag, to keep redis connections in valid state, when Redis  option is set

* docs update - add redis idle timeout configurations

* changelog update for #1691 fix

pkg/apis/options/options.go

@@ -143,7 +143,7 @@ func NewFlagSet() *pflag.FlagSet {
 	flagSet.StringSlice("redis-sentinel-connection-urls", []string{}, "List of Redis sentinel connection URLs (eg redis://HOST[:PORT]). Used in conjunction with --redis-use-sentinel")
 	flagSet.Bool("redis-use-cluster", false, "Connect to redis cluster. Must set --redis-cluster-connection-urls to use this feature")
 	flagSet.StringSlice("redis-cluster-connection-urls", []string{}, "List of Redis cluster connection URLs (eg redis://HOST[:PORT]). Used in conjunction with --redis-use-cluster")
-
+	flagSet.Int("redis-connection-idle-timeout", 0, "Redis connection idle timeout seconds, if Redis timeout option is non-zero, the --redis-connection-idle-timeout must be less then Redis timeout option")
 	flagSet.String("signature-key", "", "GAP-Signature request signature key (algorithm:secretkey)")
 	flagSet.Bool("gcp-healthchecks", false, "Enable GCP/GKE healthcheck endpoints")
 

pkg/apis/options/sessions.go

@@ -32,6 +32,7 @@ type RedisStoreOptions struct {
 	ClusterConnectionURLs  []string `flag:"redis-cluster-connection-urls" cfg:"redis_cluster_connection_urls"`
 	CAPath                 string   `flag:"redis-ca-path" cfg:"redis_ca_path"`
 	InsecureSkipTLSVerify  bool     `flag:"redis-insecure-skip-tls-verify" cfg:"redis_insecure_skip_tls_verify"`
+	IdleTimeout            int      `flag:"redis-connection-idle-timeout" cfg:"redis_connection_idle_timeout"`
 }
 
 func sessionOptionsDefaults() SessionOptions {