Static Go Binaries w/ Docker - Entrypoint Not Foun

Question

I used Static Go Binaries with Docker on OSX by Nicola Paolucci to try to use static Go binary w/ Docker. I believe I followed every step correctly, but when I run the final image, I get the following error response from Docker.

NOTE The name of my service and executable are netverify

docker: Error response from daemon: Container command '/netverify' not found or does not exist..

My Dockerfile.static looks like the following...

#Create a minimal container to run a Golang static binary

FROM tianon/true
ADD netverify /
EXPOSE 8282
CMD ["/netverify"]

My Dockerfile.build looks like the following...

FROM golang

ADD Makefile /
WORKDIR /
RUN make setup

ADD . /go/src/github.com/eirwin/netverify

RUN make buildgo
CMD ["/bin/bash"]

My Makefile is the following...

GOCMD = go
GOBUILD = $(GOCMD) build
GOGET = $(GOCMD) get -v
GOCLEAN = $(GOCMD) clean
GOINSTALL = $(GOCMD) install
GOTEST = $(GOCMD) test

.PHONY: all

all: build

setup:
    $(GOGET) github.com/gorilla/mux

buildgo:
    GOOS=linux $(GOBUILD) -o netverify ./go/src/github.com/eirwin/netverify

builddocker:
    docker build -t eirwin/netverify -f ./Dockerfile.build .
    docker run -t eirwin/netverify /bin/true
    docker cp `docker ps -q -n=1`:/netverify .
    chmod 755 ./netverify
    docker build --rm=true --tag=eirwin/netverify -f Dockerfile.static .

run:    builddocker
    docker run -p 8282:8282 eirwin/netverify    

For the purpose of this post, lets assume I have the following as my golang application.

func main() {

    router := mux.NewRouter()
    router.HandleFunc("/ping", api.PingHandler).Methods("GET")
    http.ListenAndServe(":8282", router)
}

When I run Make run everything seems to work except for when the image is ran.

I can see that the image builds correctly at ~8.5MB

eirwin/netverify  latest  eae16e146b91 3 seconds ago       8.63 MB

But when If docker run -p 8282:8282 eirwin/netverify is ran I get the following error...

docker: Error response from daemon: Container command '/netverify' not found or does not exist..

Answer 1

The go static build in your makefile is missing some options.

buildgo:
    CGO_ENABLED=0 GOOS=linux go build -ldflags "-s" -a -installsuffix cgo -o netverify ./go/src/github.com/eirwin/netverify

The build process can capture the container ID to avoid timing issues.
Separate the tags for build and binary images.

builddocker:
    docker build -t eirwin/netverify-build -f ./Dockerfile.build .
    CID=$$(docker create eirwin/netverify-build); \
    docker cp $$CID:/netverify .; \
    docker rm $$CID
    chmod 755 ./netverify
    docker build --rm=true --tag=eirwin/netverify -f Dockerfile.static .

Your binary Dockerfile.static can start with the scratch blank image.

FROM scratch