paraiorew.blogg.se - april 2022

Install kubernetes cluster on centos linuxacademy

#Install kubernetes cluster on centos linuxacademy how to#
#Install kubernetes cluster on centos linuxacademy install#
#Install kubernetes cluster on centos linuxacademy upgrade#
#Install kubernetes cluster on centos linuxacademy password#

#Install kubernetes cluster on centos linuxacademy install#

Install Docker CE prerequisite packages using yum ~]# yum install -y device-mapper-persistent-data lvm2 yum-utils Other choices for Kubernetes CRI are containerd, cri-o and frakti.Ĭonnect with Kubernetes master using ssh as root user. We are configuring Docker CE as Kubernetes CRI (Container Runtime Interface). You can either use DNS Server or Local DNS Resolver for this purpose. Make sure the hostnames are resolvable on all nodes. * We must have at least 2 cores on each node to install Kubernetes. We have two CentOS 7 virtual machines with following specifications.

Adding a node to Kubernetes Cluster on CentOS 7.

Configuring Kubelet Service on Master Node.

Therefore, if you are interested to read more about Kubernetes you should read Kubernetes in Action by Manning Publications. This article is about the installation and configuration of Kubernetes on CentOS 7 and it doesn’t addresses the technical details about Kubernetes architecture and components. Now, in this article, we are installing a two node Kubernetes / K8s cluster with Docker CE on CentOS 7. In our previous article, we have configured a Docker Swarm Cluster on CentOS 7 for container orchestration. Kubernetes supports different CRIs including Docker, containerd and cri-o. Kubernetes requires a container runtime interface (CRI) for orchestration.

Kubernetes is initially developed by Google, but now maintained by Cloud Native Computing Foundation. # kubectl get nodesġ2 Run the below command to verify the cluster information.Kubernetes or k8s is an open-source container orchestration system for automated application deployment, management and scaling across clusters of hosts. Now run the following command to list master node status. # kubectl taint node kube-master /master:NoSchedule-ġ1. NoExecute: Pod is evicted from the node if it is already running on the node, and is not scheduled onto the node if it is not yet running on the node. PreferNoSchedule: Kubernetes avoids scheduling Pods that do not tolerate this taint onto the node. NoSchedule: Pods that do not tolerate this taint are not scheduled on the node. A complementary feature, toleration, lets you designate Pods that can be used on “tainted” nodes. A node taint lets you mark a node so that the scheduler avoids or prevents using it for certain Pods. Run the below command to install overlay network # kubectl apply -f "$(kubectl version | base64 | tr -d '\n')"ġ0. Run the below commands to set variables to be able to manage kubernetes cluster # mkdir -p $HOME/.kube # sudo cp -i /etc/kubernetes/nf $HOME/.kube/config # sudo chown $(id -u):$(id -g) $HOME/.kube/config Note: Copy the token generated from the above command output for later use.ĩ.

#Install kubernetes cluster on centos linuxacademy upgrade#

Kubeadm is a toolkit produced by Kubernetes upstream for the creation and upgrade of Kubernetes clusters. Initialize the deployment of Kubernetes Cluster by running the “ kubeadm init” command. # yum install -y docker kubelet kubeadm kubectl -disableexcludes=kubernetesħ.3 Enable and start docker daemons. # cat > /etc/hosts /etc/sysctl.d/k8s.conf /etc//kubernetes.repo <

#Install kubernetes cluster on centos linuxacademy password#

Type yes and enter the root password as “linux” when prompted. Note: Keep pressing enter without entering or changing any value.Ĭopy ssh public key to Master and Worker nodes.

Generate ssh key-pair to be able to have password-less access to master and worker nodes.

Kops (Multi-node kubernetes Cluster setup On-Cloud).

Kubespray runs on bare metal and most clouds, using Ansible.

Kubeadm (Multi-node kubernetes Cluster Setup On-Prem).

Minikube (It is a single node kubernetes cluster).

Kubernetes can be installed and deployed using the following methods: In the Kubernetes setup, we have one master host and two worker nodes.Ĭluster nodes are known as worker nodes or Minion.įrom the master host, we will manage the Kubernetes using the “ kubeadm” and “ kubectl” command.

#Install kubernetes cluster on centos linuxacademy how to#

In this Lab, you will learn how to create or deploy a Kubernetes cluster on Centos 7 from scratch.