Change Ruby minor version in AWS Elastic Beanstalk

change_eb_ruby_version.sh

# Currently (2017/2018) it's not possible to change the Ruby 'minor' version (eg. 2.3 => 2.4) using the web console
# However, it's possible using the 'awscli' tool.

brew install awscli # pip install awscli
AWS_PROFILE=profile_from_credentials_file AWS_REGION=us-east-2 aws elasticbeanstalk update-environment \
  --platform-arn "arn:aws:elasticbeanstalk:us-east-2::platform/Ruby 3.3 running on 64bit Amazon Linux 2023/4.3.0" \
  --environment-name "myappenv1" --region us-east-2 \
  --version-label "app-1234-210000_120123"

# older awscli using --solution-stack-name
aws elasticbeanstalk update-environment \
  --solution-stack-name "64bit Amazon Linux 2017.09 v2.6.1 running Ruby 2.4 (Puma)" \
  --environment-name "myappenv1" --region "us-east-2" \
  --version-label "app-1234-210000_120123"

# For Amazon Linux 2
aws elasticbeanstalk update-environment \
  --solution-stack-name "64bit Amazon Linux 2 v3.2.3 running Ruby 2.7" \
  --environment-name "myappenv1" --region "us-east-2" \
  --version-label "app-1234-210000_120123"

# NOTE: pass --version-label pointing to version that "should" work with the new platform