用于调试的Golang docker文件
我有以下docker文件,它正在为我的应用程序工作。我能够访问简单的web应用服务器用于调试的Golang docker文件,docker,go,kubernetes,dockerfile,Docker,Go,Kubernetes,Dockerfile,我有以下docker文件,它正在为我的应用程序工作。我能够访问简单的web应用服务器 FROM golang:1.14.7 AS builder RUN go get github.com/go-delve/delve/cmd/dlv RUN mkdir /app ADD . /app WORKDIR /app RUN CGO_ENABLED=0 GOOS=linux go build -gcflags="all=-N -l" -o main ./... FROM alp
FROM golang:1.14.7 AS builder
RUN go get github.com/go-delve/delve/cmd/dlv
RUN mkdir /app
ADD . /app
WORKDIR /app
RUN CGO_ENABLED=0 GOOS=linux go build -gcflags="all=-N -l" -o main ./...
FROM alpine:3.12.0 AS production
COPY --from=builder /app .
EXPOSE 8000 40000
ENV PORT=8000
CMD ["./main"]
当我像下面这样采用它时,我无法成功地将其部署到Kubernetes。容器由于一些一般性错误而崩溃,这不是我可以使用的东西
standard_init_linux.go:190: exec user process caused "no such file or directory"
这不起作用
FROM golang:1.14.7 AS builder
RUN go get github.com/go-delve/delve/cmd/dlv
RUN mkdir /app
ADD . /app
WORKDIR /app
RUN CGO_ENABLED=0 GOOS=linux go build -gcflags="all=-N -l" -o main ./...
FROM alpine:3.12.0 AS production
COPY --from=builder /app .
COPY --from=builder /go/bin/dlv /
EXPOSE 8000 40000
ENV PORT=8000
CMD ["/dlv", "--listen=:40000", "--headless=true", "--api-version=2", "--accept-multiclient", "exec", "./main"]
如果有人想尝试它,这是一个简单的程序(这是一个最小的可复制的例子),如果你使用第一个docker文件,它将为你工作,第二个它不工作
主程序包
进口(
“fmt”
“net/http”
“操作系统”
)
func main(){
fmt.Println(“应用程序正在启动!”)
var端口字符串
如果port=os.Getenv(“port”);len(port)==0{
端口=“8080”
}
http.HandleFunc(“/”,handler)
http.listendServe(“:”+端口,无)
}
func处理程序(w http.ResponseWriter,r*http.Request){
fmt.Fprintf(w,“您好,%s!”,r.URL.Path[1:]
}
您需要使用静态链接标志编译dlv
本身。如果没有这一点,dlv
将有到libc的动态链接,而libc在阿尔卑斯山图像中是不存在的。其他选项包括将生产映像切换为基于debian(来自debian
)或将golang映像更改为基于alpine(来自golang:1.14.7-alpine
)。要在没有动态链接的情况下编译dlv
,以下Dockerfile可以工作:
FROM golang:1.14.7 AS builder
RUN CGO_ENABLED=0 go get -ldflags '-s -w -extldflags -static' github.com/go-delve/delve/cmd/dlv
RUN mkdir /app
ADD . /app
WORKDIR /app
RUN CGO_ENABLED=0 GOOS=linux go build -gcflags="all=-N -l" -o main ./...
FROM alpine:3.12.0 AS production
COPY --from=builder /app .
COPY --from=builder /go/bin/dlv /
EXPOSE 8000 40000
ENV PORT=8000
CMD ["/dlv", "--listen=:40000", "--headless=true", "--api-version=2", "--accept-multiclient", "exec", "./main"]
要查看动态链接,请构建构建器映像并针对输出二进制文件运行ldd
:
$ docker build --target builder -t test-63403272 .
[+] Building 4.6s (11/11) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 570B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/golang:1.14.7 0.2s
=> [builder 1/6] FROM docker.io/library/golang:1.14.7@sha256:1364cfbbcd1a5f38bdf8c814f02ebbd2170c93933415480480104834341f283e 0.0s
=> [internal] load build context 0.0s
=> => transferring context: 591B 0.0s
=> CACHED [builder 2/6] RUN go get github.com/go-delve/delve/cmd/dlv 0.0s
=> CACHED [builder 3/6] RUN mkdir /app 0.0s
=> [builder 4/6] ADD . /app 0.1s
=> [builder 5/6] WORKDIR /app 0.0s
=> [builder 6/6] RUN CGO_ENABLED=0 GOOS=linux go build -gcflags="all=-N -l" -o main ./... 4.0s
=> exporting to image 0.2s
=> => exporting layers 0.2s
=> => writing image sha256:d2ca7bbc0bb6659d0623e1b8a3e1e87819d02d0c7f0a0762cffa02601799c35e 0.0s
=> => naming to docker.io/library/test-63403272 0.0s
$ docker run -it --rm test-63403272 ldd /go/bin/dlv
linux-vdso.so.1 (0x00007ffda66ee000)
libpthread.so.0 => /lib/x86_64-linux-gnu/libpthread.so.0 (0x00007faa4824d000)
libc.so.6 => /lib/x86_64-linux-gnu/libc.so.6 (0x00007faa4808c000)
/lib64/ld-linux-x86-64.so.2 (0x00007faa48274000)
当切换到alpine时,Libc是一个常见的缺失库,因为默认情况下它使用musl。请向我们显示错误。尝试在基于alpine的生成器映像上构建,如
golang:1.14.6-alpine3.12
@Henry-我尝试了一下,它也不起作用,还有其他想法吗?@shmsr-错误是:standard\u init\u linux.go:190:exec用户进程导致“没有这样的文件或目录”
这是否回答了您的问题?