Editing Troubleshooting Deploying a Django Application With Elastic Beanstalk (section)

== `eb deploy` errors where EB environment doesn't match ==

'''Use case'''

Attempting to update `.ebextensions/01-packages.config` to list Git and PostgreSQL as packages to install, then running `eb deploy` to install the packages, the deploy process quits with errors to the effect that the YAML is malformed in the `.config` file. Editing the file makes it evident that the errors are originating in another environment.

'''Cause'''

Logged into wrong EC2 instance. 

You can log into an EC2 instance and run `eb init` and `eb create` commands to create new Elastic Beanstalk applications and environments. The new app will spawn a new EC2 instance, ''that is separate from the current EC2 instance''. 

'''Fix'''

It's necessary to `ssh` to the correct EC2 instance to run `eb deploy`. Go back to the AWS EC2 console, find the EC2 instance corresponding to the new EB environment, and `ssh` to its public DNS.