EC2

I really like using AWS SSM Session Manager for EC2 instances management whenever it’s possible, and recently faced a case where the requirement was to use Ansible for configuration management of EC2 instances, but without opening SSH access to them. That sounded like a good use case for SSM Session Manager, but I had to do some research to figure out how to make it work with Ansible. I ended up using two approaches - one with a static inventory for a single instance, and another with dynamic discovery for a fleet of instances. Both are based on the community.aws.aws_ssm connection plugin, which uses SSM Session Manager under the hood to connect to the target instances without SSH. The main difference is how the inventory is built - either hardcoded with instance IDs or dynamically discovered via EC2 API queries. ...

AWS SSM Session Manager became my default way of connecting to EC2 instances, since it’s convenient, secure and doesn’t require opening SSH ports / configuring bastion etc. It’s enough to have the right IAM permissions (AmazonSSMManagedInstanceCore managed policy) and SSM agent installed and running on the instance, which is the case for most default AMIs. You can start a session via AWS Console as simple as clicking “Connect” on the EC2 instance page and selecting “Session Manager” as the connection method: ...