在heroku上部署一个golang应用程序，构建成功但应用程序错误 [英] Deploying a golang app on heroku, build succeed but application error
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问题描述
我的 golang 应用程序在我的本地主机的 9000 端口上运行.在使用 godep 支持将其部署到 heroku 后，我能够在 heroku 上进行推送和部署.但是，当我尝试访问端点时，例如/"，它显示应用程序错误.在 heroku 上部署时，您可以在下面看到我的代码和日志
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
}*/
}
部署时的heroku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
您的应用程序已启动，但由于您未将网络服务器绑定到指定端口而被终止.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:
2019-07-08T05:03:48.131507+00:00 heroku[web.1]: Error R10(启动超时)-> Web 进程未能在启动后 60 秒内绑定到 $PORT
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
在 Heroku 上，您必须将 HTTP 服务器绑定到由 PORT 环境变量指定的端口.在 Heroku 网关的帮助下，您的应用将在默认 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.
所以在预期的端口上启动你的服务器.而不是这样:
So start your server on the expected port. Instead of this:
err := grace.Serve(":9000", context.ClearHandler(http.DefaultServeMux))
这样做:
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上部署一个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IT屋！
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