Multistage dockerize go

Prerequisites

• Dockerfile commands
• This Issue
• This Golang 1.16 Change
• Golang Dockerhub

Ok, let’s go Then…

0. Why Go?

Golang has efficient server resource consumption.

1. Why Dockerize?

Because of Docker’s benefits have to offer, ye?

2. Why Mulstistage?

Golang Docker Too Big yanno.

main.go

package main

import (
  "fmt"
  "log"
)

func main() {
  fmt.Println("Hello")

  log.Printf(" [*] Waiting for messages. To exit press CTRL+C")
}

Dockerfile

FROM golang:buster AS builder

WORKDIR /app/
COPY main.go .
RUN go env -w GO111MODULE=on
RUN go env -w GOPROXY=https://proxy.golang.org,direct

RUN go build ./main.go

FROM alpine:latest
WORKDIR /app/
COPY --from=builder /app .

CMD ["./main"]

Next build your dockerfile.

$ docker build -t your-image-name .

Last, run your container

$ docker run -it your-image-name

In case you found some error like:

go.mod file not found in current directory or any parent directory; see 'go help modules'

Means your Go version, not the latest enough. Add go.mod

module shohiebsense.com/hello