Wrong Ruby version on Elastic Beanstalk platform

Question

I just created an environment using the platform "Ruby 3.0 running on 64bit Amazon Linux 2/3.6.2" but when I shell into the server and check the ruby version using ruby -v it shows "ruby 2.7.5p203 (2021-11-24 revision f69aeb8314) [aarch64-linux]".

![Platform displayed in Elastic Beanstalk console](/media/postImages/original/IMu6bWtIXzS0q_qbiNJRBDIg)

I've provisioned 2 environments with this platform but they're both stuck on Ruby 2.7.5 instead of the expected 3.0.5.  I've also confirmed via IP addresses that I am indeed shelled into the correct instances for these Elastic Beanstalk environments.

What should be my next step to get this working?

Accepted Answer

I figured it out.  I had copied a saved configuration to create the new EB environments, updating the parameters as needed for the new platform.  However,  there was a configuration in there that specified an ami ImageId which overrode the platform preference:

```
  AWSEBEC2LaunchTemplate.aws:autoscaling:launchconfiguration:
    ImageId: ami-XXXXXXXXXXXXXXXXX
```
I removed the ImageId line and once the environment was provisioned it had the proper Ruby version.

Wrong Ruby version on Elastic Beanstalk platform

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