本文介绍了在heroku上部署golang应用程序，构建成功但应用程序错误的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我的golang应用程序在本地主机的9000端口上运行.在使用godep支持将其部署到heroku之后，我得以在heroku上进行推送和部署.但是，当我尝试访问端点时，例如"/"，它显示了应用程序错误.您可以在我的代码下方看到并在heroku上部署时进行登录
My golang app runs on port 9000 at my localhost. After deploying it at heroku using godep support, i was able to push and deploy at heroku. However when i try to access the endpoint e.g '/', it shows Application Error. You can see below my code and log while deploying at heroku
package main
import (
"log"
"fmt"
"net/http"
"os"
"github.com/gorilla/mux"
"github.com/gorilla/context"
"gopkg.in/paytm/grace.v1"
// utilhttp "bitbucket.org/michaelchandrag/chit/pkg/util/http"
// util "bitbucket.org/michalechandrag/chit/pkg/util"
)
func main() {
log.Println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ CHIT STARTED $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
log.Println("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
muxRouter := mux.NewRouter()
muxRouter.HandleFunc("/", Articles)
http.Handle("/", muxRouter)
// err = grace.Serve(":"+cfg.Server.Port, context.ClearHandler(http.DefaultServeMux))
err := grace.Serve(":9000", context.ClearHandler(http.DefaultServeMux))
if err != nil {
log.Println("[ERROR GRACEFUL]", err)
os.Exit(1)
}
os.Exit(0)
}
func Articles(w http.ResponseWriter, r *http.Request) {
// vars := mux.Vars(r)
w.WriteHeader(http.StatusOK)
fmt.Fprintf(w, "Hello")
// r.Close = true
// w.Header().Set("Content-Type", "application/json")
// w.Header().Set("Access-Control-Allow-Origin", "*")
/*if r.Method == "OPTIONS" {
w.WriteHeader(http.StatusOK)
return
}
if err := fn(w, r); err != nil {
log.Println(err)
apiObject := ConstructAPIError(http.StatusInternalServerError, ErrGeneral, SysMsgErrGeneral, MsgErrGeneral)
SendAPIObject(w, apiObject)
return
}*/
}
heroku部署时的日志
heroku logs while deploying
-----> Go app detected
-----> Fetching jq... done
-----> Fetching stdlib.sh.v8... done
-----> Checking Godeps/Godeps.json file.
-----> New Go Version, clearing old cache
-----> Installing go1.12.6
-----> Fetching go1.12.6.linux-amd64.tar.gz... done
-----> Running: go install -v -tags heroku ./...
bitbucket.org/michaelchandrag/chit/pkg
bitbucket.org/michaelchandrag/chit/vendor/github.com/gorilla/context
bitbucket.org/michaelchandrag/chit/vendor/github.com/gorilla/mux
bitbucket.org/michaelchandrag/chit/vendor/gopkg.in/tylerb/graceful.v1
bitbucket.org/michaelchandrag/chit/vendor/gopkg.in/paytm/grace.v1
bitbucket.org/michaelchandrag/chit/pkg/util
bitbucket.org/michaelchandrag/chit
Installed the following binaries:
./bin/chit
-----> Discovering process types
Procfile declares types -> web
-----> Compressing...
Done: 7.5M
-----> Launching...
Released v3
https://michaelchandrag-project.herokuapp.com/ deployed to Heroku
访问端点前后的应用日志
app logs before and after access endpoint
2:47.954106+00:00 heroku[web.1]: Starting process with command `chit`
2019-07-08T05:02:49.413453+00:00 app[web.1]: 2019/07/08 05:02:49 $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ CHIT STARTED $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
2019-07-08T05:02:49.413476+00:00 app[web.1]: 2019/07/08 05:02:49 $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
2019-07-08T05:02:49.413647+00:00 app[web.1]: 2019/07/08 05:02:49 starting serve on :9000
2019-07-08T05:03:48.131507+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2019-07-08T05:03:48.131595+00:00 heroku[web.1]: Stopping process with SIGKILL
2019-07-08T05:03:48.214979+00:00 heroku[web.1]: State changed from starting to crashed
2019-07-08T05:03:48.193205+00:00 heroku[web.1]: Process exited with status 137
2019-07-08T10:38:59.721224+00:00 heroku[web.1]: State changed from crashed to starting
2019-07-08T10:39:00.359017+00:00 heroku[web.1]: Starting process with command `chit`
2019-07-08T10:39:02.232435+00:00 app[web.1]: 2019/07/08 10:39:02 $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$ CHIT STARTED $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
2019-07-08T10:39:02.232458+00:00 app[web.1]: 2019/07/08 10:39:02 $$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$
2019-07-08T10:39:02.232583+00:00 app[web.1]: 2019/07/08 10:39:02 starting serve on :9000
2019-07-08T10:40:00.462841+00:00 heroku[web.1]: Error R10 (Boot timeout) -> Web process failed to bind to $PORT within 60 seconds of launch
2019-07-08T10:40:00.462974+00:00 heroku[web.1]: Stopping process with SIGKILL
2019-07-08T10:40:00.555959+00:00 heroku[web.1]: Process exited with status 137
2019-07-08T10:40:00.573427+00:00 heroku[web.1]: State changed from starting to crashed
2019-07-08T13:33:25.021835+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=michaelchandrag-project.herokuapp.com request_id=e6b5c93a-7177-4080-9858-ed925a20c513 fwd="36.74.35.162" dyno= connect= service= status=503 bytes= protocol=https
2019-07-08T13:33:25.566036+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=michaelchandrag-project.herokuapp.com request_id=35c741a9-be4d-48f6-ba99-ba24ddc58b9b fwd="36.74.35.162" dyno= connect= service= status=503 bytes= protocol=https
2019-07-08T13:48:38.294082+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/" host=michaelchandrag-project.herokuapp.com request_id=57a3a243-58f4-4efe-b478-eb660d84fe1f fwd="36.74.35.162" dyno= connect= service= status=503 bytes= protocol=https
2019-07-08T13:48:38.616077+00:00 heroku[router]: at=error code=H10 desc="App crashed" method=GET path="/favicon.ico" host=michaelchandrag-project.herokuapp.com request_id=0687b8a8-86ae-4c49-a37f-9cbf9e0f75de fwd="36.74.35.162" dyno= connect= service= status=503 bytes= protocol=https
推荐答案
您的应用已启动，但由于未将网络服务器绑定到指定端口而被杀死.从日志消息中可以清楚地看出这一点:
Your app starts but is getting killed because you don't bind your webserver to the specified port. This is clear from the log message:
在Heroku上，您必须将HTTP服务器绑定到 PORT 环境变量指定的端口.借助Heroku网关，您的应用将在默认的HTTP和HTTPS端口上公开可用.
On Heroku you have to bind your HTTP server to the port specified by the PORT environment variable. Your app will be publicly available on default HTTP and HTTPS ports with the help of Heroku gateways.
因此，请在预期的端口上启动服务器.代替这个:
So start your server on the expected port. Instead of this:
err := grace.Serve(":9000", context.ClearHandler(http.DefaultServeMux))
执行此操作:
port := os.Getenv("PORT")
if port == "" {
port = "9000" // Default port if not specified
}
err := grace.Serve(":" + port, context.ClearHandler(http.DefaultServeMux))
这篇关于在heroku上部署golang应用程序，构建成功但应用程序错误的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！