Mounting EFS using .ebextensions file

Question

I am deploying a PHP app using AWS Elastic Beanstalk. I would like to use EFS I've already built. I'm using a .ebextension folder using following link as guide:

https://github.com/awsdocs/elastic-beanstalk-samples/blob/master/configuration-files/aws-provided/instance-configuration/storage-efs-mountfilesystem.config

I have configured the storage-efs-mountfilesystem.config file in .ebextension folder file:

option_settings:
  aws:elasticbeanstalk:application:environment:
    FILE_SYSTEM_ID: fs-12345678
    MOUNT_DIRECTORY: '/efs'

When I look in my ec2 instance spun up from elastic beanstalk, I do not see the EFS mounted. I am trying to figure out what might be the issue here? Wouldn't it be better to have EFS details in a file in .ebextension folder so it can be persistently mounted when software is deployed regularly?

You are writing ".ebextension". The folder should be called `.ebextensions`. Can you confirm you are using correct folder in your project? — Marcin, Jul 07 '20 at 04:40
I'm new to ELB, so unfamiliar with the logs. I have downloaded the zip of the logs. Is there specific log I should look at? — NetSystemAdmin, Jul 07 '20 at 05:14
Don't remember which single log could be of interest. You can search through all of them to quickly look for ERRORs, "commands", EFS or any similar keyword. — Marcin, Jul 07 '20 at 05:16
Thank you! I deployed to Amazon Linux 1 and was successfully able to mount efs automatically. — NetSystemAdmin, Jul 08 '20 at 03:48
No problem. Glad I could help. Acceptance of this answer would also be appreciated if it was helpful :-) — Marcin, Jul 08 '20 at 03:56

score 0 · Accepted Answer · answered Jul 07 '20 at 05:43

Based on the additional information from comments.

The issue is due to:

/opt/elasticbeanstalk/bin/get-config: No such file or directory

This file exists only for EB environments running Amazon Linux 1, not for Amazon Linux 2. Since PHP 7.4 running on 64bit Amazon Linux 2/3.0. is used, the storage-efs-mountfilesystem.config fails, as it requires Amazon Linux 1.

In this situation there are generally two options to rectify the issue:

Use Amazon Linux 1.
Or adapt storage-efs-mountfilesystem.config to work with Amazon Linux 2.

It should be noted that there are many differences between Amazon Linux 1 and 2. General steps to migrate from the older to newer version are below:

Migrating your Elastic Beanstalk Linux application to Amazon Linux 2

Mounting EFS using .ebextensions file

1 Answers1