Docker daemon hangs opening (or writing) to fifo #911 https://github.com/docker/for-mac/issues/911

.gitignore

app
6461f4aa65877e88485c8a0b888a579c

README.md

• This locks-up on macos.
• It's something due to the out fifo.
• Reading from the in fifo seems to work ok.
• Works great on Linux.

make run

Dockerfile

FROM scratch

COPY app /

ENTRYPOINT ["/app"]

main.go

package main

import (
	"bufio"
	"fmt"
	"io"
	"log"
	"os"
	"time"
)

//
func main() {

	var in *bufio.Reader
	if i, err := os.OpenFile("in", os.O_RDONLY, 0); err != nil {
		log.Fatalln(err)
		return
	} else {
		in = bufio.NewReader(i)
	}

	out, err := os.OpenFile("out", os.O_WRONLY, 0666)
	if err != nil {
		log.Fatalln(err)
		return
	}
	defer out.Close()

	for {
		line, err := in.ReadBytes('\n')

		if err == io.EOF {
			return
		}

		if err != nil {
			log.Println(err)
			return
		} else {
			log.Println(string(line))
			fmt.Fprint(out, time.Now(), string(line))
		}
	}

}

Makefile

build: app
	docker build --tag pipe .

SOURCES := $(wildcard *.go)

app: $(SOURCES)
	go vet
	env CGO=false GOOS=linux GOARCH=amd64 go build -ldflags="-s -w" -a -installsuffix cgo -v -o $@
	go build -o $@

run: in out build
	cat out &
	docker run -d --name fifo -v $(PWD)/in:/in -v $(PWD)/out:/out pipe
	cat main.go >in

in out:
	mkfifo $@

clean:
	rm -f in out app 6461f4aa65877e88485c8a0b888a579c
	docker rm fifo || true
	docker rmi pipe:latest || true