redigo different pool connect to single server

so, i have a necessity to connect to 3 redis server. i create 3 connection pool, and initialize each of them. but redigo seems only connected to single redis server, although i get the connection using different pool.

using redigo, here's my code below

import (
    "fmt"
    "time"
    "github.com/garyburd/redigo/redis"
)

var poolA *redis.Pool
var poolB *redis.Pool
var poolC *redis.Pool

func main() {
    poolA = &redis.Pool{}
    poolB = &redis.Pool{}
    poolC = &redis.Pool{}

    connections := []string{"localhost:6379", "localhost2:6379", "localhost3:6379"}

    for k, v := range connections {
        redisPool := &redis.Pool{
            Dial: func() (redis.Conn, error) {
                return redis.Dial("tcp", v)
            },
            TestOnBorrow: func(c redis.Conn, t time.Time) error {
                if time.Since(t) < time.Minute {
                    return nil
                }
                _, err := c.Do("PING")
                return err
            },
            IdleTimeout: time.Duration(10) * time.Second,
            MaxActive:   100,
            MaxIdle:     100 / 2,
            Wait:        true,
        }

        if k == 0 {
            fmt.Println("poolA:", v)
            poolA = redisPool
        }
        if k == 1 {
            fmt.Println("poolB:", v)
            poolB = redisPool
        }
        if k == 2 {
            fmt.Println("poolC:", v)
            poolC = redisPool
        }
    }

    con := poolA.Get()
    defer con.Close()
    count, err := redis.Int(con.Do("SADD", "any:test", 3246))
    if err != nil {
        fmt.Println("error querying redis:", err.Error())
    }
    fmt.Println("count=", count)

    con2 := poolB.Get()
    defer con2.Close()
    count, err = redis.Int(con2.Do("SADD", "any:test", 3246))
    if err != nil {
        fmt.Println("error querying redis:", err.Error())
    }
    fmt.Println("count=", count)

    con3 := poolC.Get()
    defer con3.Close()
    count, err = redis.Int(con3.Do("SADD", "any:test", 3246))
    if err != nil {
        fmt.Println("error querying redis:", err.Error())
    }
    fmt.Println("count=", count)
}

the problem is, all 3 pools are connecting to the last server/connection, resulting just as below. any idea?

poolA: localhost:6379
poolB: localhost2:6379
poolC: localhost3:6379
error querying redis: dial tcp: lookup localhost3: no such host
count= 0
error querying redis: dial tcp: lookup localhost3: no such host
count= 0
error querying redis: dial tcp: lookup localhost3: no such host
count= 0

Process finished with exit code 0