Docker Swarm Mode Key Concepts
The following are the docker swarm mode key concepts:
- Node: A Node is an instance of a Docker engine that connects to the Swarm. You can run one or more nodes on a single physical computer or cloud server. Nodes can be either a manager or workers. The manager node dispatches units of work called tasks to worker nodes. Worker nodes receive and execute tasks dispatched from manager nodes.
- Services: A service is a high-level concept relating to a collection of tasks to be executed by workers. An example of a service is an HTTP Server running as a Docker Container on three nodes.
- Load Balancing: Docker includes a load balancer to process requests across all containers in the service.
Introduction to Docker Swarm Mode
Docker swarm is a container orchestration tool. Swarm Mode in Docker was introduced in version 1.12 which enables the ability to deploy multiple containers on multiple Docker hosts. For this Docker uses an overlay network for the service discovery and with a built-in load balancer for scaling the services. One of the key advantages of docker swarm is that the configuration of the docker services such as volume and network can be modified without the need to manually restart the service Docker will update the configuration, stop the service tasks with the out-of-date configuration, and create new ones matching the desired configuration.
Table of Content
- What is Docker and Docker Container?
- What is Docker Swarm?
- What are the Task and Service in Docker Swarm?
- How Does Docker Swarm Work?
- Docker Swarm Init
- Docker Swarm Architecture
- Features of Docker Swarm
- What is Docker Swarm Used For?
- Different Modes of Docker Swarm
- How to Install and Setup Docker Swarm on AWS? A Step-By-Step Guide
- How to Setup Docker Swarm Mode?
- How to Create a Task in Docker Swarm Cluster?
- Getting Started With Swarm Mode
- What is Stack in Docker Swarm?
- Docker Swarm Mode Key Concepts
- Docker Swarm Filters
- Docker Swarm Mode CLI Commands
- Docker Container vs Docker Swarm
- Docker Swarm vs Kubernetes
- Docker Service vs Docker Task
- Benefits of Docker Swarm