英文:
Mux Router doesn't work in Dockerized golang project
问题
我在本地进行了测试，应用程序在本地完全正常工作。
我可以从POST和GET方法中获取响应。
但是当我将应用程序容器化并尝试测试相同的端点时，我什么都得不到。
我已经尝试了Stackoverflow上的所有建议。所以我将粘贴我的Dockerfile和Makefile，以获取您的意见。
我的Dockerfile：
FROM golang:1.16.5 AS build-env
RUN set -x \
&& apt-get update -y \
&& apt-get install -y locales \
make \
xz-utils \
zip \
&& rm -rf /var/lib/apt/lists/*
FROM build-env AS builder
WORKDIR /build
COPY . .
RUN set -x \
&& make
FROM debian:buster AS runner
RUN set -x \
&& apt-get update -y \
&& apt-get install -y ca-certificates \
&& rm -rf /var/lib/apt/lists/* \
&& update-ca-certificates
COPY --from=builder /build/bin/* .
CMD ["./applicaitonx"]
以及我的Makefile：
build:
go build -o bin/applicaitonx -v -buildmode=exe .
为了能够构建Docker，我使用以下命令：
docker build -t app .
然后我运行它。
我看到应用程序正在运行，并且listenandserve没有抛出任何错误。但是mux根本没有路由。
它说它在监听，但实际上并没有。
我还将在main.go中复制以下部分：
srv := &http.Server{
Handler: router,
Addr: ":" + os.Getenv("PORT"),
}
if err := srv.ListenAndServe(); err != nil {
log.Fatal("ListenAndServe: ", err)
}
我检查了所有的环境变量，所以os.GetEnv("PORT")不会返回空值。我对此非常确定。
我写了一些调试注释，就我所看到的，代码甚至不执行那些调试注释。所以它根本不打印任何内容。
英文:
I tested locally and it works totally fine on my local.
I can get responses from POST, GET methods.
But when I dockerize the application and try to test the same endpoints, I get nothing.
I have tried all the suggestions herein Stackoverflow. So I will paste my Dockerfile and Makefile to get your opinions on it.
My Dockerfile:
FROM golang:1.16.5 AS build-env
RUN set -x \
&& apt-get update -y \
&& apt-get install -y locales \
make \
xz-utils \
zip \
&& rm -rf /var/lib/apt/lists/*
FROM build-env AS builder
WORKDIR /build
COPY . .
RUN set -x \
&& make
FROM debian:buster AS runner
RUN set -x \
&& apt-get update -y \
&& apt-get install -y ca-certificates \
&& rm -rf /var/lib/apt/lists/* \
&& update-ca-certificates
COPY --from=builder /build/bin/* .
CMD ["./applicaitonx"]
and my Makefile:
build:
go build -o bin/applicaitonx -v -buildmode=exe .
to be able to build the docker, I'm using the following command;
docker build -t app .
and then I run it.
I see that the application is running and listenandserve doesn't throw an error at all. BUT mux is not routing at all.
It says it listens but it doesn't.
I will also copy the following part in main.go
srv := &http.Server{
Handler: router,
Addr: ":" + os.Getenv("PORT"),
}
if err := srv.ListenAndServe(); err != nil {
log.Fatal("ListenAndServe: ", err)
}
I inspect all the env variables, so os.GetEnv("PORT") doesn't return null. I'm sure about it.
I wrote some debug comments, and as far as I see codes doesn't go even that debug comments. So it doesn't print anything at all.
答案1
得分: 1
可能是因为你在容器内部使用的端口没有对外部公开，所以你无法访问它们。尝试像下面这样添加-p标志：
docker run -p P1:P2
P1 = TCP端口
P2 = 容器端口
请参考：这个文档
英文:
It might be possible that the port you are using inside the container is not exposed to outside world, hence you can't reach them. Try adding -p flag like below:
docker run -p P1:P2
P1 = TCP port
P2 = Container port
Please refer: this doc
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