Run docker container with arguments

docker-compose.yml

version: "3.7"
services:

  ecs-task:
    image: ecs-task:latest
    container_name: ecs-task
    build:
      context: ./
      dockerfile: Dockerfile
    environment:
      - GO_ENV=docker

Dockerfile

FROM golang:1.13.7-alpine3.10
ADD . /go/src/workspace/ecs-task
WORKDIR /go/src/workspace/ecs-task
RUN go build -o ecs-task && mv ecs-task /bin
CMD /bin/sh ./entrypoint.sh

entrypoint.sh

#!bin/sh

ecs-task -start_time "$(date '+%Y-%m-%d %H:00:00')"

howto.md

ファイル構成

• ecs-task/docker-compose.yml
• ecs-task/Dockerfile
• ecs-task/entrypoint.sh
• ecs-task/main.go

$ cd ecs-task
$ docker-compose build
$ docker-compose run --rm ecs-task
start_time:2020-02-04 12:00:00 +0000 UTC

Amazon ECSのタスクスケジュール機能とかで、実行時にtimestamp渡したい場合に使う

main.go

package main

import (
	"errors"
	"flag"
	"fmt"
	"log"
	"os"
	"time"
)

const (
	timeFormat = "2006-01-02 15:04:05"
)

var (
	startTime time.Time
)

func main() {

	var startTimeStr string
	flag.StringVar(&startTimeStr, "start_time", "", "time format 2006-01-02 15:04:05")
	flag.Parse()
	if startTimeStr == "" {
		log.Fatal(errors.New("start_time is empty"))
	}

	startTime, err := time.Parse(timeFormat, startTimeStr)
	if err != nil {
		log.Fatal(err)
	}

	fmt.Printf("start_time:%v\n", startTime)
	os.Exit(0)
}