Redis cluster - Golang example

package main

import (
    "context"
    "fmt"
    "strings"

    "github.com/go-redis/redis"
)

func main() {
    fmt.Println("Hello!")

    rdb := redis.NewClusterClient(&redis.ClusterOptions{
        Addrs: []string{":6379", ":6380",
            ":6381", "7379", ":7380", ":7381"},
    })

    // Check if usual operations work.
    err := rdb.SAdd(context.Background(),
        "lol{a}", "suck", "my", "dick").Err()
    handleError(err)

    set, err := rdb.SMembers(context.Background(),
        "lol{a}").Result()
    handleError(err)

    fmt.Println("lol{a}:", strings.Join(set, ", "))

    // Check if transactions work.
    // Keys should have the same hashtag in {}
    // in order to perform transactions and scripts on them.
    tx := rdb.TxPipeline()

    err = tx.SAdd(context.Background(),
        "kek{a}", "fuck", "shit").Err()
    handleError(err)

    err = tx.SUnionStore(context.Background(),
        "lol{a}", "kek{a}", "lol{a}").Err()
    handleError(err)

    err = tx.Del(context.Background(),
        "kek{a}").Err()
    handleError(err)

    _, err = tx.Exec(context.Background())
    handleError(err)

    err = tx.Close()
    handleError(err)

    set, err = rdb.SMembers(context.Background(),
        "lol{a}").Result()
    handleError(err)

    fmt.Println("lol{a}:", strings.Join(set, ", "))

    // Check if Lua scripts work.
    script := `redis.call('SADD', KEYS[1], ARGV[1], ARGV[2], ARGV[3])

               return redis.call('SMEMBERS', KEYS[1])`
    data, err := rdb.Eval(context.Background(), script,
        []string{"foo"}, "bar", "fizz", "buzz").Result()
    handleError(err)

    elems := data.([]interface{})
    set = make([]string, len(elems))

    for i, elem := range elems {
        set[i] = elem.(string)
    }

    fmt.Println("Set:", strings.Join(set, ", "))
}

func handleError(err error) {
    if err != nil {
        panic(err)
    }
}