{"id":5994,"date":"2024-03-22T12:01:54","date_gmt":"2024-03-22T12:01:54","guid":{"rendered":"https:\/\/natsav.com\/blog\/?p=5994"},"modified":"2024-03-28T12:25:47","modified_gmt":"2024-03-28T12:25:47","slug":"install-kubernetes-on-centos-7","status":"publish","type":"post","link":"https:\/\/natsav.com\/blog\/install-kubernetes-on-centos-7\/","title":{"rendered":"How to Install Kubernetes on Centos 7"},"content":{"rendered":"<p>To install Kubernetes (often abbreviated as k8s) on CentOS 7, you typically use a tool called kubeadm. Here&#8217;s a step-by-step guide on how to do this:<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_68_1 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title \" >Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/natsav.com\/blog\/install-kubernetes-on-centos-7\/#Prerequisites\" title=\"Prerequisites:\">Prerequisites:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/natsav.com\/blog\/install-kubernetes-on-centos-7\/#Conclusion\" title=\"Conclusion:\">Conclusion:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/natsav.com\/blog\/install-kubernetes-on-centos-7\/#VPS_Reseller_Hosting_Packages_%E2%80%93_Launch_Your_Own_Hosting_Company_Easily\" title=\"VPS Reseller Hosting Packages &#8211; Launch Your Own Hosting Company Easily!\">VPS Reseller Hosting Packages &#8211; Launch Your Own Hosting Company Easily!<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Prerequisites\"><\/span><strong>Prerequisites:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A CentOS 7 server with at least 2GB of RAM and 2 CPU cores (though more resources are recommended for production use).<br \/>\nA user account with sudo privileges.<\/p>\n<p><strong>Step 1: <\/strong>Update System Packages<\/p>\n<p>Ensure your system is up-to-date by running:<br \/>\nsudo yum update -y<\/p>\n<p><strong>Step 2:<\/strong> Disable SELinux<br \/>\nSELinux can interfere with Kubernetes, so it&#8217;s recommended to disable it. Edit the SELinux configuration file:<br \/>\nsudo vi \/etc\/selinux\/config<br \/>\nChange SELINUX=enforcing to SELINUX=disabled.<\/p>\n<p><strong>Step 3:<\/strong> Disable Swap<br \/>\nKubernetes requires disabling swap to ensure proper performance and stability. Temporarily turn off swap:<br \/>\nsudo swapoff -a<br \/>\nEdit \/etc\/fstab to comment out the swap entry if you want to disable it permanently.<\/p>\n<p><strong>Step 4:<\/strong> Install Docker<br \/>\nKubernetes uses Docker as its container runtime. Install Docker using the following commands:<\/p>\n<p>sudo yum install -y yum-utils device-mapper-persistent-data lvm2<br \/>\nsudo yum-config-manager &#8211;add-repo https:\/\/download.docker.com\/linux\/centos\/docker-ce.repo<br \/>\nsudo yum install -y docker-ce<br \/>\nsudo systemctl enable docker<br \/>\nsudo systemctl start docker<\/p>\n<p><strong>Step 5:<\/strong> Add Kubernetes Repository<br \/>\nAdd the Kubernetes repository to your system:<\/p>\n<p>sudo vi \/etc\/yum.repos.d\/kubernetes.repo<br \/>\nAdd the following content to the file:<br \/>\nmakefile<\/p>\n<p>[kubernetes]<br \/>\nname=Kubernetes<br \/>\nbaseurl=https:\/\/packages.cloud.google.com\/yum\/repos\/kubernetes-el7-x86_64<br \/>\nenabled=1<br \/>\ngpgcheck=1<br \/>\nrepo_gpgcheck=1<br \/>\ngpgkey=https:\/\/packages.cloud.google.com\/yum\/doc\/yum-key.gpg https:\/\/packages.cloud.google.com\/yum\/doc\/rpm-package-key.gp<\/p>\n<p><strong>Step 6:<\/strong> Install Kubernetes Components<\/p>\n<p>Install Kubernetes components (kubeadm, kubelet, kubectl):<br \/>\nsudo yum install -y kubelet kubeadm kubectl<br \/>\nsudo systemctl enable kubelet<\/p>\n<p><strong>Step 7:<\/strong> Initialize Kubernetes Cluster<br \/>\nUse kubeadm to initialize the Kubernetes cluster. Replace YOUR_IP_ADDRESS with the IP address of your CentOS server:<br \/>\nsudo kubeadm init &#8211;apiserver-advertise-address=YOUR_IP_ADDRESS &#8211;pod-network-cidr=192.168.0.0\/16<\/p>\n<p><strong>Step 8:<\/strong> Set Up kubeconfig<br \/>\nSet up kubectl configuration for your user:<\/p>\n<p>mkdir -p $HOME\/.kube<br \/>\nsudo cp -i \/etc\/kubernetes\/admin.conf $HOME\/.kube\/config<br \/>\nsudo chown $(id -u):$(id -g) $HOME\/.kube\/config<br \/>\nStep 9: Install Pod Network Addon<br \/>\nInstall a Pod network addon to enable networking between pods. In this example, we&#8217;ll use Calico:<br \/>\nkubectl apply -f https:\/\/docs.projectcalico.org\/manifests\/calico.yaml<\/p>\n<p><strong>Step 10:<\/strong> Join Worker Nodes (Optional)<br \/>\nIf you have additional CentOS servers you want to join to the Kubernetes cluster as worker nodes, use the kubeadm join command provided at the end of Step 7.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span><strong>Conclusion:<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>You now have Kubernetes installed on your CentOS 7 server. You can verify the status of your cluster by running kubectl get nodes or kubectl get pods -A. Make sure to follow best practices and security guidelines when deploying applications on your Kubernetes cluster.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"VPS_Reseller_Hosting_Packages_%E2%80%93_Launch_Your_Own_Hosting_Company_Easily\"><\/span><strong>VPS Reseller Hosting Packages<\/strong> &#8211; Launch Your Own Hosting Company Easily!<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For further information regarding\u00a0 <a href=\"https:\/\/natsav.com\/linux-vps-server-hosting.php\"><strong>linux vps server India<\/strong><\/a>, linux vps hosting India, linux vps India, vps hosting India, cheap vps hosting India, low cost vps hosting, vps server india please contact us directly.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>To install Kubernetes (often abbreviated as k8s) on CentOS 7, you typically use a tool called kubeadm. Here&#8217;s a step-by-step guide on how to do this: Prerequisites: A CentOS 7 server with at least 2GB of RAM and 2 CPU cores (though more resources are recommended for production use). A user account with sudo privileges. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":5995,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[267],"tags":[],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"https:\/\/i0.wp.com\/natsav.com\/blog\/wp-content\/uploads\/2024\/03\/kubernet-e1711108902286.png?fit=641%2C350&ssl=1","jetpack-related-posts":[],"_links":{"self":[{"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/posts\/5994"}],"collection":[{"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/comments?post=5994"}],"version-history":[{"count":10,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/posts\/5994\/revisions"}],"predecessor-version":[{"id":6027,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/posts\/5994\/revisions\/6027"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/media\/5995"}],"wp:attachment":[{"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/media?parent=5994"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/categories?post=5994"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/natsav.com\/blog\/wp-json\/wp\/v2\/tags?post=5994"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}