How can I use GoLand's built-in Docker integration to migrate a small Go service to a new container image without downtime?

It is important to distinguish between container lifecycle management and traffic orchestration. While GoLand's Docker integration (via the Services tool window and Run/Debug configurations) can automate the build-and-run cycle of a new image, the IDE itself does not include a native traffic-shifting controller for Blue-Green or Canary deployments.

Key Technical Considerations

• Port Conflicts: If you attempt to launch a new container instance before stopping the old one using a standard Docker Run configuration, you will likely encounter a Bind for 0.0.0.0:PORT failed error because the host port is already occupied.
• Volume Persistence: GoLand can reuse existing named volumes if they are explicitly defined in the Run configuration or a docker-compose.yml file, ensuring data persists across image swaps.
• Orchestration Gap: To achieve zero downtime, you typically need a layer above the IDE—such as a reverse proxy (e.g., Nginx) or an orchestrator (e.g., Docker Swarm/Kubernetes)—to route traffic away from the old container before the IDE triggers the replacement.