What flag is used when creating an overlay network to allow containers to attach later?

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When creating an overlay network in Docker, the flag used to allow containers to attach to the network at a later time is the --attachable flag. This feature is particularly beneficial for scenarios involving Docker Swarm, where the network may need to be used by services and standalone containers alike.

By using --attachable, you enable non-swarm containers to connect to this overlay network. This provides enhanced flexibility and allows for easier integration of different services and applications that may not be orchestrated through Swarm but still need to communicate over the same network.

Other options may sound similar, but they are not recognized flags in Docker networking commands. Understanding the correct usage of the --attachable flag enhances the ability to manage overlay networks effectively in multi-container environments.

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