How to set environment variables in Amazon Elastic Beanstalk when running a cron job (Node.js)? -


i have been working on configuring cron job while deploying environment on elastic beanstalk. purpose of job run every 30 minutes , execute node.js script processes sms schedules in our system; when schedule ready, sms message sent via twilio api.

unfortunately, node.js environments don't have file /opt/elasticbeanstalk/support/envvars containing environment variables defined (maybe missing something?).

to work around issue, loading environment variables /opt/elasticbeanstalk/bin/get-config in python , executing node.js script.

everything working expected can in same situation; however, i wondering if there better way accomplish this... open suggestions.

in .ebextensions folder have config file 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 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"

here python script gets executed part of cron job:

#!/usr/bin/env python  import os import subprocess subprocess import popen, pipe, call import simplejson json  envdata = json.loads(popen(['/opt/elasticbeanstalk/bin/get-config', 'environment'], stdout = pipe).communicate()[0])  k, v in envdata.iteritems():     os.environ[k] = v  call(["babel-node", "/var/app/current/process-sms-schedules.js"])

thanks in advance feedback.

references

cron job elastic beanstalk

how set environment variable in amazon elastic beanstalk (python)

i had issue while trying execute php file inside elastic beanstalk environment. in particular trying execute wp-cron.php file.

basically should write cron job 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

explained:

  • every 5 minutes executes commands user "ec2-user": '*/5 * * * * ec2-user'
  • loads elasticbeanstalk environment variables: '. /opt/elasticbeanstalk/support/envvars;'.
  • do not print output: '> /dev/null 2>&1'.

also:

.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 user "ec2-user": '*/5 * * * * ec2-user'. # loads elasticbeanstalk environment variables: '. /opt/elasticbeanstalk/support/envvars;'. # not print 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"

maybe not same node.js environment pretty sure similar.


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