How to add multiple keys for elastic beanstalk instance?

Question

There is a very good question on [How to] SSH to Elastic [an] Beanstalk instance, but one thing I noticed is that, through this method, it is only possible to add one SSH ke

Answer 1

Following on from Jim Flanagan's answer, you could get the keys added to every instance by creating .ebextensions/app.config in your application source directory with contents:

commands:
  copy_ssh_key_userA: 
    command: echo "ssh-rsa AAAB3N...QcGskx userA" >> /home/ec2-user/.ssh/authorized_keys
  copy_ssh_key_userB: 
    command: echo "ssh-rsa BBRdt5...LguTtp userB" >> /home/ec2-user/.ssh/authorized_keys