Why we need Docker Swarm?
Let us take an example to understand the need of Docker Swarm. Let us say you have an application that is divided into 100 containers, now you will need to manage and control multiple containers at a time as a single service. This is called Orchestration – managing and controlling multiple containers as a single service. And this is what we use Docker Swarm for.
We use Docker Swarm for the following tasks:
- Health check on every container
- Ensure all containers are up on every system
- Scaling the containers up or down
- Adding updates/changes to all the containers
- Deploying a fixed set of containers
- Performing rolling update of the containers
- Load Balancing of the containers
Docker Swarm: Building a Highly Scalable Cluster
Docker Swarm is one of the most popular container orchestration engines. It is not only used by professional engineers but also by people is their learning phase of how operations work. What makes Docker Swarm so popular is the fact that is very lightweight and very simple to understand – you don’t even have to learn a new CLI for Docker Swarm, we can use it with Docker CLI.
In this article, we will learn about Docker Swarm, its features, and use cases and will also go through a tutorial to create highly scalable clusters in Docker Swarm.