运行cron作业（Node.js）时如何在Amazon Elastic Beanstalk中设置环境变量？ [英] How to set environment variables in Amazon Elastic Beanstalk when running a cron job (Node.js)?

问题描述

在Elastic Beanstalk上部署环境时，我一直在配置cron作业。这项工作的目的是每30分钟运行一次，并执行一个Node.js脚本来处理我们系统中的SMS调度。计划完成后，将通过Twilio api发送一条SMS消息。

I have been working on configuring a cron job while deploying an environment on Elastic Beanstalk. The purpose of the job is to run every 30 minutes and execute a Node.js script that processes SMS schedules in our system; when a schedule is ready, an SMS message is sent via the Twilio api.

不幸的是，Node.js环境中没有文件 / opt / elasticbeanstalk / support / envvars 包含定义为（也许我遗漏了什么？）的环境变量。

Unfortunately, Node.js environments don't have the file /opt/elasticbeanstalk/support/envvars containing the environment variables defined (Maybe I am missing something?).

要变通解决此问题，我正在Python中从 / opt / elasticbeanstalk / bin / get-config 加载环境变量，然后执行我的Node.js脚本。

To work around this issue, I am loading the environment variables from /opt/elasticbeanstalk/bin/get-config in Python and then executing my Node.js script.

一切都按预期进行，因此希望这可以帮助处于相同情况的某人；但是，我想知道是否有更好的方法来完成此操作...接受建议。

Everything is working as expected so hopefully this can help someone in the same situation; however, I am wondering if there is a better way to accomplish this... Open to suggestions.

在我的.ebextensions文件夹中， cron的配置文件：

In my .ebextensions folder I have the config file for the cron:

files:
    "/etc/cron.d/process-sms-schedules":
        mode: "000644"
        owner: root
        group: root
        content: |
            */30 * * * * root /usr/local/bin/process-sms-schedules.sh

    "/usr/local/bin/process-sms-schedules.sh":
        mode: "000755"
        owner: root
        group: root
        content: |
            #!/bin/bash

            # Execute script to process schedules
            python /var/app/current/process-sms-schedules.py > /var/log/process-sms-schedules.log

            exit 0

commands:
    remove_old_cron:
        command: "rm -f /etc/cron.d/*.bak"

以下是作为脚本的一部分执行的Python脚本cron作业：

Here is the Python script that gets executed as part of the cron job:

#!/usr/bin/env python

import os
import subprocess
from subprocess import Popen, PIPE, call
import simplejson as json

envData = json.loads(Popen(['/opt/elasticbeanstalk/bin/get-config', 'environment'], stdout = PIPE).communicate()[0])

for k, v in envData.iteritems():
    os.environ[k] = v

call(["babel-node", "/var/app/current/process-sms-schedules.js"])

在此先感谢您的任何反馈。

Thanks in advance for any feedback.

Cron Job Elastic Beanstalk

如何在Amazon Elastic Beanstalk（Python）中设置环境变量

推荐答案

在尝试在Elastic Beanstalk环境中执行PHP文件时遇到此问题。特别是我正在尝试执行wp-cron.php文件。

I had this issue while trying to execute a PHP file inside an Elastic Beanstalk environment. In particular I was trying to execute wp-cron.php file.

基本上，您应该编写一个cron作业，例如：

Basically you should write a cron job like this:

/etc/cron.d/wp-cronjob ：

PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/aws/bin:/home/ec2-user/.local/bin:/home/ec2-user/bin
*/5 * * * * ec2-user . /opt/elasticbeanstalk/support/envvars; /usr/bin/php /var/www/html/wp-cron.php > /dev/null 2>&1

解释：

• 每5分钟以用户 ec2-user的身份执行命令：'* / 5 * * * * ec2-user'


• 加载elasticbeanstalk环境变量：'。 / opt / elasticbeanstalk / support / envvars;'。


• 不打印任何输出：'> / dev / null 2>& 1'。

也：

.ebextensions / wp-cronjob.txt

# Load paths
PATH=/usr/local/bin:/bin:/usr/bin:/usr/local/sbin:/usr/sbin:/sbin:/opt/aws/bin:/home/ec2-user/.local/bin:/home/ec2-user/bin

# Every 5 minutes executes commands as user "ec2-user": '*/5 * * * * ec2-user'.
# Loads elasticbeanstalk environment variables: '. /opt/elasticbeanstalk/support/envvars;'.
# Do not print any output: '> /dev/null 2>&1'.
*/5 * * * * ec2-user . /opt/elasticbeanstalk/support/envvars; /usr/bin/php /var/www/html/wp-cron.php > /dev/null 2>&1

.ebextensions / cronjob.config >

container_commands:
  add_wp_cronjob:
    command: "cat .ebextensions/wp-cronjob.txt > /etc/cron.d/wp-cronjob && chmod 644 /etc/cron.d/wp-cronjob"
    leader_only: true

commands:
  remove_old_cron:
    command: "rm -f /etc/cron.d/*.bak"

对于Node.js环境可能并不相同，但我可以肯定它们是相似的。

Maybe is not the same for a Node.js environment but I am pretty sure they are similar.

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