Node.js 在 Docker 容器内创建一个 cron 作业(job)来执行 run.js 文件中的函数

我已经创建了一个docker-compose.yaml文件、Dockerfile和entrypoint.sh文件.Dockerfile用于创建一个ubuntu容器.在这个ubuntu容器中，我安装了Node.js并克隆了我的项目存储库，然后运行该项目.该项目运行起来没有任何问题.但是，需要执行run.js文件中写的以下函数.

const users = require("./user");
users();

console.log()在user.js文件中，

function users() {
    console.log("I am the function in user.js")
}

module.exports = users;

Docker-Compose.yaml:，

version: '3'
services:
  node-backend:
    build:
      context: .
      dockerfile: Dockerfile
    image: cron-api
    container_name: cron-api-cont
    ports:
      - 3002:3002
    entrypoint: /app/entrypoint.sh

文档文件:

FROM ubuntu:22.04

# Install necessary dependencies
RUN apt-get update && \
    apt-get install -y git curl cron

# Install Node.js
RUN curl -fsSL https://deb.nodesource.com/setup_16.x | bash -
RUN apt-get install -y nodejs

# Create app working directory
WORKDIR /app

# Copy the entrypoint script into the container
COPY entrypoint.sh /app/entrypoint.sh


# Set executable permissions for the entrypoint script
RUN chmod +x /app/entrypoint.sh


# Expose the app port
EXPOSE 3002

入口点.sh:

!/bin/bash
# Set GitHub credentials
GIT_USERNAME="username"
GIT_TOKEN="my_token_private"
BRANCH="main"  


# Clone the repository using credentials
git clone -b $BRANCH "https://${GIT_USERNAME}:${GIT_TOKEN}@github.com/username/node-for-docker-test.git" /app/api


# Check if the cloning process is complete
if [ -d "/app/api" ]; then
  echo "Cloning completed successfully."
  echo "List of directories inside api:"
  ls -d /app/api
else
  echo "Cloning failed."
fi

# Go to the backend directory
cd  /app/api

# Install node modules
npm ci

# Start the server
npm start &


# Schedule the cron job to execute the users() function every 5 minutes
echo "*/1 * * * * node /app/api/run.js" > /tmp/cron_job.txt
echo "Cron job definition created."

# Check if the run.js file exists and print its content
run_js_file="/app/api/run.js"
if [ -f "$run_js_file" ]; then
    echo "Found run.js file. Content:"
    cat "$run_js_file"
else
    echo "run.js file not found."
fi

# Install the cron job from the file
crontab /tmp/cron_job.txt
echo "Cron job installed."

# Start the cron service
service cron start &
echo "Cron service started."

# Keep the container running
tail -f /dev/null

使用entry ypoint t.sh，我克隆了repo并安装了 node 模块.然后开始这个项目.我不想为cron作业(job)编写另一个.sh.当我在容器内的/app/或/app/api/目录中编写命令时，当我手动执行node /app/api/run.js时，它会运行users()函数.

root@6ef26d9188:/app/api# ls
index.js  node_modules  package-lock.json  package.json  run.js  user.js
root@6ef26d9188:/app/api# pwd
/app/api
root@6ef26d9188:/app/api# node /app/api/run.js
I am the function in user.js

在 docker 内部，运行cron服务.运行容器后，输出crontab -l为；

root@6ef26d9188:/# crontab -l
*/1 * * * * node /app/api/run.js

输出service cron status个IS；

root@6ef26d918826:/# service cron status
 * cron is running

这是容器的日志(log):

 ✔ Container cron-api-cont  Created                                        0.1s 
Attaching to cron-api-cont
cron-api-cont  | Cloning into '/app/api'...
cron-api-cont  | Cloning completed successfully.
cron-api-cont  | List of directories inside api:
cron-api-cont  | /app/api
cron-api-cont  | 
cron-api-cont  | added 90 packages, and audited 91 packages in 3s
cron-api-cont  | 
cron-api-cont  | 11 packages are looking for funding
cron-api-cont  |   run `npm fund` for details
cron-api-cont  | 
cron-api-cont  | 3 moderate severity vulnerabilities
cron-api-cont  | 
cron-api-cont  | To address all issues (including breaking changes), run:
cron-api-cont  |   npm audit fix --force
cron-api-cont  | 
cron-api-cont  | Run `npm audit` for details.
cron-api-cont  | npm notice 
cron-api-cont  | npm notice New major version of npm available! 8.19.4 -> 9.7.2
cron-api-cont  | npm notice Changelog: <https://github.com/npm/cli/releases/tag/v9.7.2>
cron-api-cont  | npm notice Run `npm install -g npm@9.7.2` to update!
cron-api-cont  | npm notice 
cron-api-cont  | Cron job definition created.
cron-api-cont  | Found run.js file. Content:
cron-api-cont  | const users = require("./user");
cron-api-cont  | 
cron-api-cont  | users();Cron job installed.
cron-api-cont  | Cron service started.
cron-api-cont  |  * Starting periodic command scheduler cron
cron-api-cont  |    ...done.
cron-api-cont  | 
cron-api-cont  | > cron_tutorial@1.0.0 start
cron-api-cont  | > nodemon index.js
cron-api-cont  | 
cron-api-cont  | [nodemon] 2.0.22
cron-api-cont  | [nodemon] to restart at any time, enter `rs`
cron-api-cont  | [nodemon] watching path(s): *.*
cron-api-cont  | [nodemon] watching extensions: js,mjs,json
cron-api-cont  | [nodemon] starting `node index.js`
cron-api-cont  | server is running on port 3002

有没有人知道，为什么不在终端上每1分钟打印一次console log结果？