What is the difference between Docker Swarm services and standalone containers in terms of resilience and scaling?

Question

Docker Fundamentals — Hard

What is the difference between Docker Swarm services and standalone containers in terms of resilience and scaling?

Accepted Answer

Swarm services in Docker are declarative, meaning you define the desired state and the Swarm manager maintains it by automatically rescheduling failed replicas. On the other hand, standalone containers are imperative and do not automatically replace themselves if they fail.