A worker will continue to run your workload once they’re assigned to it, even if the master goes down once scheduling is complete. containerized applications and services) will run. Worker nodes are the servers where your workloads (i.e. It runs Etcd, which stores cluster data among components that schedule workloads to worker nodes. The master node (a node in Kubernetes refers to a server) is responsible for managing the state of the cluster.

Your cluster will include the following physical resources:

In this guide, you will set up a Kubernetes cluster from scratch using Ansible and Kubeadm, and then deploy a containerized Nginx application to it. Using these tools makes creating additional clusters or recreating existing clusters much simpler and less error-prone. For these preliminary tasks, it is possible to use a configuration management tool like Ansible or SaltStack. It does not, however, create users or handle the installation of operating-system-level dependencies and their configuration. Kubeadm automates the installation and configuration of Kubernetes components such as the API server, Controller Manager, and Kube DNS. For up-to-date information on the latest version, please see the current release notes in the official Kubernetes documentation. Note: This tutorial uses version 1.14 of Kubernetes, the official supported version at the time of this article’s publication.

Install ansible centos 7