What does CodeDeploy RESTART actually deploy?
It reruns the deployment lifecycle using the deployment group's last successful revision. You omit the revision from the request. CodeDeploy agents version 2.1.0 and later can reuse the local archive; if it is missing or invalid, the agent downloads the same pinned revision.
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AWS CodeDeploy RESTART Reuses a Revision, but Your Fleet Still Needs a Drain PlanCodeDeploy RESTART reapplies an EC2 or on-prem revision under deployment safeguards. See its agent, lifecycle and traffic-drain requirements.
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