Add support for connecting using Amazon SSM.

Review Request #14191 — Created Sept. 26, 2024 and submitted — Latest diff uploaded

Information

fabazon
master

Reviewers

Amazon SSM provides on-demand SSH access to hosts that may not be
exposed to the Internet in any form, adding extra security to
infrastructure.

SSM support can now be enabled by passign use_ssm=True to
EC2RoleDefs. This will result in EC2 instance IDs being returned
instead of hostnames.

This does require ~/.ssh/config to be configured properly for SSM
support, and that env.use_ssh_config = True is enabled in the
fabfile.

Tested this with our deployment infrastructure and verified that
Fabric and Paramiko engaged with SSM and connected.

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