standard_init_linux.go:190: exec user process caused “no such file or directory” Docker with go basic web app

Question

The very basic web app is created in Go

package main

import(
   "fmt"
   "net/http"
   "os"
)

func hostHandler(w http.Response         


        

Answer 1

In my case CGO_ENABLED=0 was the key to fix this problem.

Cgo allows to use inline C code in Go sources, see more: https://golang.org/cmd/cgo/

I reckon by default Cgo links your application dynamically to libc, even if you don't use any inline C.
And libc is missing when you package your application to Docker image FROM scratch

Here is my working Dockerfile:

FROM golang:1.9.2-alpine AS builder
WORKDIR /go/src/app
COPY . .
RUN CGO_ENABLED=0 go install


FROM scratch
WORKDIR /opt
COPY --from=builder /go/bin/app .
ENTRYPOINT ["/opt/app"]

Answer 2

File not found can mean the file is missing, a script missing the interpreter, or an executable missing a library. In this case, the net import brings in libc by default, as a dynamic linked binary. You should be able to see that with ldd on your binary.

To fix it, you'll need to pass some extra flags:

CGO_ENABLED=0 GOOS=linux GOARCH=amd64 go build -a -tags netgo -ldflags '-w' -o mybin *.go

The above is from: https://medium.com/@diogok/on-golang-static-binaries-cross-compiling-and-plugins-1aed33499671

Answer 3

In my case en env was not enough: RUN CGO_ENABLED=0 GOOS=linux GOARCH=amd64

I had to add as well in the build the tags and ldflags: RUN go build -a -tags netgo -ldflags '-w' -o /go/bin/myService *.go

Answer 4

Try change line in your Dockerfile

COPY webapp /webapp

Answer 5

I used this and it works

env GOARCH=386 GOOS=linux go build webapp.go