Description: A guest node in Docker Swarm is an essential component within the container orchestration architecture that enables the management and scalability of distributed applications. Unlike nodes that host services, a guest node is part of the Docker Swarm cluster but does not run any service tasks at that moment. This means that, while it can participate in the network and communicate with other nodes, its role is more passive. Guest nodes can be used to balance load, act as backups, or be activated to run services if other nodes are overloaded or inactive. This flexibility allows organizations to optimize resource usage and improve the resilience of their applications. Additionally, guest nodes can be easily promoted to active nodes when more processing capacity is needed, facilitating the horizontal scalability of applications. In summary, guest nodes are an integral part of the Docker Swarm infrastructure, providing a solid foundation for the efficient management of containers and services in a distributed environment.
