我正在尝试实现http服务器:
目标是实现最大吞吐量(至少15k rps)。为了做到这一点,我想异步保存日志。我使用kafka作为日志记录系统,并将代码的日志记录块分离到单独的goroutine中。当前实施的总体示例:
package main
import (
"github.com/confluentinc/confluent-kafka-go/kafka"
"net/http"
"time"
"encoding/json"
)
type log struct {
RuntimeParam string `json:"runtime_param"`
AsyncParam string `json:"async_param"`
RemoteAddress string `json:"remote_address"`
}
var (
producer, _ = kafka.NewProducer(&kafka.ConfigMap{
"bootstrap.servers": "localhost:9092,localhost:9093",
"queue.buffering.max.ms": 1 * 1000,
"go.delivery.reports": false,
"client.id": 1,
})
topicName = "log"
)
func main() {
siteMux := http.NewServeMux()
siteMux.HandleFunc("/", httpHandler)
srv := &http.Server{
Addr: ":8080",
Handler: siteMux,
ReadTimeout: 2 * time.Second,
WriteTimeout: 5 * time.Second,
IdleTimeout: 10 * time.Second,
}
if err := srv.ListenAndServe(); err != nil {
panic(err)
}
}
func httpHandler(w http.ResponseWriter, r *http.Request) {
handlerLog := new(log)
handlerLog.RuntimeParam = "runtimeDataString"
http.Redirect(w, r, "http://google.com", 301)
go func(goroutineLog *log, request *http.Request) {
goroutineLog.AsyncParam = "asyncDataString"
goroutineLog.RemoteAddress = r.RemoteAddr
jsonLog, err := json.Marshal(goroutineLog)
if err == nil {
producer.ProduceChannel() <- &kafka.Message{
TopicPartition: kafka.TopicPartition{Topic: &topicName, Partition: kafka.PartitionAny},
Value: jsonLog,
}
}
}(handlerLog, r)
}
问题是:
答案 0 :(得分:0)
问题是处理程序可能在goroutine开始处理所有内容之前完成执行,并且请求(这是一个指针)可能已经消失,或者您可能会在中间件堆栈中进行一些竞争。我看了你的评论,这不是你的情况,但总的来说,你不应该将请求传递给goroutine。正如我从您的代码中看到的那样,您实际上只使用了请求中的RemoteAddr
,为什么不直接重定向并将记录放入延迟语句中?所以,我稍微重写了你的处理程序:
func httpHandler(w http.ResponseWriter, r *http.Request) {
http.Redirect(w, r, "http://google.com", 301)
defer func(runtimeDataString, RemoteAddr string) {
handlerLog := new(log)
handlerLog.RuntimeParam = runtimeDataString
handlerLog.AsyncParam = "asyncDataString"
handlerLog.RemoteAddress = RemoteAddr
jsonLog, err := json.Marshal(handlerLog)
if err == nil {
producer.ProduceChannel() <- &kafka.Message{
TopicPartition: kafka.TopicPartition{Topic: &topicName, Partition: kafka.PartitionAny},
Value: jsonLog,
}
}
}("runtimeDataString", r.RemoteAddr)
}