#CENTOS 7 INSTALL GUIDE HOW TO#

Note: This tutorial uses the flannel virtual network add-on. Make a note of the entry and use it to join worker nodes to the cluster at a later stage. Once this command finishes, it displays a kubeadm join message. The process might take several minutes to complete based on network speed. Initialize a cluster by executing the following command: sudo kubeadm init -pod-network-cidr=10.244.0.0/16

#CENTOS 7 INSTALL GUIDE HOW TO#

Sudo swapoff -a How to Deploy a Kubernetes Cluster Step 1: Create Cluster with kubeadm Lastly, we need to disable SWAP to enable the kubelet to work properly: sudo sed -i '/swap/d' /etc/fstab Sudo sed -i вЂs/^SELINUX=enforcing$/SELINUX=permissive/вЂ™ /etc/selinux/config Use following commands to disable SELinux: sudo setenforce 0 SELinux needs to be set to permissive mode, which effectively disables its security functions. The containers need to access the host filesystem. This ensures that packets are properly processed by IP tables during filtering and port forwarding. Set the -nf-call-iptables to '1' in your sysctl config file. Sudo firewall-cmd -permanent -add-port=10255/tcpД®ach time a port is added the system confirms with a вЂsuccessвЂ™ message.Д®nter the following commands on each worker node: sudo firewall-cmd -permanent -add-port=10251/tcp Sudo firewall-cmd -permanent -add-port=10252/tcp Sudo firewall-cmd -permanent -add-port=10251/tcp Sudo firewall-cmd -permanent -add-port=10250/tcp Sudo firewall-cmd -permanent -add-port=2379-2380/tcp

On the Master Node enter: sudo firewall-cmd -permanent -add-port=6443/tcp Add the following ports by entering the listed commands. Firewalld is enabled in CentOS by default on the front-end. The nodes, containers, and pods need to be able to communicate across the cluster to perform their functions. Make a host entry or DNS record to resolve the hostname for all nodes: sudo vi /etc/hosts In this example, the master node is now named master-node, while a worker node is named worker-node1. Or sudo hostnamectl set-hostname worker-node1 To give a unique hostname to each of your nodes, use this command: sudo hostnamectl set-hostname master-node cat /etc//kubernetes.repoД«efore deploying a cluster, make sure to set hostnames, configure the firewall, and kernel settings. Enter the following command to retrieve the Kubernetes repositories. This step needs to be performed on the Master Node, and each Worker Node you plan on utilizing for your container setup. Kubernetes packages are not available from official CentOS 7 repositories. Docker needs to be installed on CentOS, both on the Master Node and the Worker Nodes. Currently, the most popular container solution is Docker. To use Kubernetes, you need to install a containerization engine.

Steps for Installing Kubernetes on CentOS 7

The yum package manager, included by default.

A user account on every system with sudo or root privileges.

Multiple Linux servers running CentOS 7 (1 Master Node, Multiple Worker Nodes).

Centos 7 install guide