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by mritun 4237 days ago
> The CodeDeploy service seems to operate by you manually launching base ec2 instance with a code deploy agent and then this agent will checkout your git code on the live instance, run any provisioning steps and then if things break somehow rollback all that work, still on the live instance.

Deploy and rollback doesn't happen on live instances. (Group of) Instances are taken off service for rolling deployment and you can configure what percentage of your fleet should be deployed to at once.