Question

使用以下docker-compose.yml文件，我创建一个包含两个服务的堆栈：一个是Web应用程序（称为 broker ），另一个是MySQL数据库（称为 broker_db） ）Web应用程序使用的。

我发现我必须告诉代理服务要等到MySQL初始化，并且我可以使用shell脚本来延迟代理实际启动Web应用程序，直到它可以开始使用数据库。但是，我在运行docker-compose up时遇到以下错误：

 broker_1     | standard_init_linux.go:190: exec user process caused "no such file or directory"

我的docker-compose.yml文件是：

version: '3'

services:
  broker-db:
    image: mysql:5.7 # https://store.docker.com/images/mysql
    restart: always
    environment:
      MYSQL_DATABASE: broker # Create a database with name broker during container initialization.
      MYSQL_ROOT_PASSWORD: root # Set root/root as user/password credentials in the container.
    ports:
      - "3302:3306"
    volumes:
      - ./broker-db-volume:/var/lib/mysql
    networks:
      - shared-network

  broker:
    build: .
    command: ["/code/wait-for-mysql-init.sh", "broker-db", "python3", "manage.py", "runserver", "0.0.0.0:8080"]
    volumes:
      - .:/code
    ports:
      - "8080:8080"
    depends_on:
      - broker-db
    restart: always
    networks:
      - shared-network

networks:
  shared-network:

代理的Dockerfile将其根项目文件夹中的所有代码添加到docker容器中的/code，因此我不明白为什么docker-compose up说它无法找到wait-for-mysql-init.sh：< / p>

# Based on https://docs.docker.com/compose/django
FROM python:3.6
ENV PYTHONUNBUFFERED 1
RUN mkdir /code
WORKDIR /code
ADD requirements.txt /code/
RUN pip install -r requirements.txt
ADD . /code/
RUN chmod +x wait-for-mysql-init.sh

shell脚本如下：

#!/bin/bash
# wait-for-mysql-init.sh

# Taken from https://stackoverflow.com/a/29793382/5433896.
# Argument handling based on https://unix.stackexchange.com/questions/31414.
# Delayed command execution based on https://docs.docker.com/compose/startup-order/.

set -e # Exit immediately if a command exits with a non-zero status (https://stackoverflow.com/a/19622569/5433896).

DB_HOST="$1" # First argument passed to the script
shift # Forget the first argument, $2 becomes $1, $3 becomes $2 and so on.
command="$@" # All remaining arguments form the command to execute after MySQL is initialized.

while ! mysqladmin ping -h"$DB_HOST" --silent; do
    echo "The initialization of MySQL on $DB_HOST is still ongoing."
    sleep 1
done

echo "The initialization of MySQL on $DB_HOST has finished. It is ready to accept incoming queries."
echo "MySQL is up and running. Executing command $command."
exec $command

此外，我的经纪人项目内容的简要概述：

C:\*somepath*\broker
├───broker-application-code
├───broker-db-volume
├───broker
├───.dockerignore
├───docker-compose.yml
├───Dockerfile
├───manage.py
├───requirements.txt
└───wait-for-mysql-init.sh

因此shell脚本肯定存在于添加到docker镜像中，ADD指令在Dockerfile中，为什么在启动代理容器时仍然找不到shell脚本？

Answer 1

使用shell脚本，找不到可执行文件意味着脚本本身不存在，或者脚本在第一行上启动的shell不存在。需要注意的事项：

你的图片中是否存在/ bin / bash？它应该是因为python 3.6基于Debian。
是容器内的卷安装覆盖目录？ .:/code卷装置意味着您在该位置的图像中执行的所有操作都将被替换，但您似乎是从同一目录运行。
是真正尝试运行/bin/bash的脚本，还是文件中有Windows换行符？ Linux不了解Windows换行符，因此它会查找要执行的/bin/bash^M，而不存在。

Answer 2

尝试from pathlib import Path def saveJSONget(site, code): r = requests.get(site) json_str = r.text if r.status_code != code: Path("PATH").write_text(r.text+"\n")而不是$.ajax({ url: "url", type : "POST", async: false, contentType: "application/json", //dataType: "json", data : { firstDate : monday, secondDate : lastday} //student_name : $('#id_student_name').val() }).then(function(data) { var obj = JSON.parse(data); for (var a = 0; a < obj.results.length; a++) { res[a] = obj.results[a]; dates.push(obj.results[a].DATESTART); } console.log(res); });

COPY

Docker-compose：exec用户进程导致“没有这样的文件或目录”但文件存在

2 个答案: