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What is Docker swarm cluster?

A Docker Swarm is a group of either physical or virtual machines that are running the Docker application and that have been configured to join together in a cluster. Docker swarm is a container orchestration tool, meaning that it allows the user to manage multiple containers deployed across multiple host machines.

Correspondingly, what is meant by Docker Swarm?

Docker Swarm is a clustering and scheduling tool for Docker containers. With Swarm, IT administrators and developers can establish and manage a cluster of Docker nodes as a single virtual system.

Subsequently, question is, what is difference between Docker and Docker Swarm? Docker runs containers on a single machine, while docker swarm orchestrates a collection of containers (and the communication between them) across a network, allowing you to join multiple ‘host’ machines together to create a resilient, redundant cluster.

Simply so, how does Docker swarm work?

A swarm consists of multiple Docker hosts which run in swarm mode and act as managers (to manage membership and delegation) and workers (which run swarm services). Docker works to maintain that desired state. For instance, if a worker node becomes unavailable, Docker schedules that node’s tasks on other nodes.

What is the operational model used by Docker swarm for managing a cluster?

Current versions of Docker include swarm mode for natively managing a cluster of Docker Engines called a swarm. Use the Docker CLI to create a swarm, deploy application services to a swarm, and manage swarm behavior.

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