Out of which once server will act as a Manager node and two servers will act as Worker node.
Three Alibaba cloud instances with CentOS 7 installed.In this tutorial, we will go through the step by step instruction on configuring three node Docker Swarm cluster on CentOS 7. You can deploy manager and worker nodes at runtime in Docker engine's Swarm mode. The Swarm manager allows you to create a primary manager instance and multiple replica instances in case the primary instance fails. Worker node is a instance of Docker engine that can be used to execute container. Manager node used for handling cluster management tasks such as, maintaining cluster state, scheduling services and serving swarm mode HTTP API endpoints. Docker Swarm consists of two main components Manager node and Worker node. Docker Swarm allows you to add or subtract container iterations as computing demands change. By Hitesh Jethva, Alibaba Cloud Tech Share Authorĭocker Swarm is a native clustering tool for Docker containers that can be used to manage a cluster of Docker nodes as a single virtual system.
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