github.com/voedger/voedger@v0.0.0-20240520144910-273e84102129/design/orchestration/10-review-existing-1-swarm.md (about)

     1  ## Swarm mode key concepts
     2  
     3  https://docs.docker.com/engine/swarm/key-concepts/
     4  
     5  - A **Node** is an instance of the Docker engine participating in the swarm
     6  - A **Service** is the definition of the tasks to execute on the manager or worker nodes
     7    - When you create a service, you specify which container image to use and which commands to execute inside running containers.
     8  - A **Task** carries a Docker container and the commands to run inside the container. It is the atomic scheduling unit of swarm
     9    - Manager nodes assign tasks to worker nodes according to the number of replicas set in the service scale.