Introduction to Docker Swarm

On this occasion, I will introduce Docker Swarm to my friends. It is a cluster management feature owned by the Docker engine. Docker Swarm allows for easy deployment and scaling of applications, as well as internal load balancing.

In a traditional system, load balancing and application deployment require external solutions. However, Docker Swarm eliminates the need for external load balancers by allowing every node in the swarm to function as a load balancer. Additionally, Docker Swarm uses a declarative service model, where you specify what you want the swarm to do, and it handles deploying and managing the services accordingly.

Other features of Docker Swarm include service discovery, which allows services within the swarm to communicate with each other using service names instead of IP addresses, and rolling updates, which update replicas one by one instead of updating the entire deployment at once.

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