The Docker Swarm mode is Docker-native as of Docker 1.12 and is used to create distributed and scalable services for developing Docker applications.
The Problem
While single Docker image applications are also commonly used, a vast majority of Docker enterprise applications are comprised of multiple images that have dependencies between them. Docker Compose (standalone in v1 and v2) could be used to declare dependencies between microservices using the links and depends_on options, but Compose (standalone) is archaic, other than the format for defining services, ...
