[go redigo]maxactive/wait可能无法工作，仍在创建数千个连接。
go版本：1.14 github.com/gomodule/redigo v2.0.0+不兼容
第一步：编写如下代码，wait为true，maxactive为99。步骤2：在k8s中部署容器。进行负载测试/步骤3：使用 netstat -nat | grep 6379 | wc -l ，您可以找到每个pod的连接都超过maxactive。

# netstat -nat | grep 6379 | wc -l

xxbp-blacklist-6c9fcb57f4-66jpw
2897
xxbp-blacklist-6c9fcb57f4-6pdrp
12853
xxbp-blacklist-6c9fcb57f4-9kpjs
252
xxbp-blacklist-6c9fcb57f4-hkwj7
165

第四步，在aws-elasticache-redis服务器监控工具中，可以发现连接总数达到10000个。
代码--redisutil.go--

package redisutil

import (
    "AuthService/config"
    "context"
    "fmt"
    "github.com/gomodule/redigo/redis"
    "log"
    "time"
)

var pool *redis.Pool

func InitializeRedisPool() error {
    conf := config.GetConfig()
    conf.AutomaticEnv()
    pool = &redis.Pool{
        MaxIdle:     10,
        MaxActive:   99,
        Wait:        true,
        IdleTimeout: 240 * time.Second,
        Dial: func() (redis.Conn, error) {
            c, err := redis.Dial("tcp",
                conf.GetString("redis_host"),
                redis.DialPassword(conf.GetString("redis_token")),
                redis.DialTLSSkipVerify(conf.GetBool("redis_tlsskipverify")),
                redis.DialUseTLS(conf.GetBool("redis_usetls")))
            if err != nil {
                log.Fatalln("Redis error during connect! " + conf.GetString("redis_host") +
                    " redis_token" + conf.GetString("redis_token") +
                    " redis_tlsskipverify:" + conf.GetString("redis_tlsskipverify") +
                    " redis_usetls:" + conf.GetString("redis_usetls"))
                log.Fatalln(err)
                return nil, err
            } else {
                return c, nil
            }
        },
    }

    //Check whether conn can be set up correctly
    conn, err := pool.GetContext(context.Background())
    if err != nil {
        return err
    }
    defer conn.Close()
    return nil
}

func VerifyBlacklist(token string) bool {
    conn := pool.Get()

    defer conn.Close()

    exists, err := redis.Bool(conn.Do("EXISTS", "blacklist:"+token))
    if err != nil {
        // handle error return from c.Do or type conversion error.
        log.Println("Redis error: error return from c.Do or type conversion error.")
        log.Println(err)
        return false //Use this temporally, friend for testing
    }

    return exists
}

--代码main.go---

err := redisutil.InitializeRedisPool()
    if err != nil {
        log.Print("Redis error! InitializeRedisPool Fail!")
    }

--api将在负载测试期间调用数千个redisutil.verifyblacklist---