This document explains the installation of Kubernetes version 1.24.10 on a server with RHEL (Red Hat Enterprise Linux) 9.2 operating system.


File to Download

offlineApinizerInstallation-RHEL9.2.tar (830 MB)  
https://drive.google.com/file/d/18fWhCZzh4FykLImrGwN83OHtN2zi62uG/view?usp=sharing
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The packages created in .tar format on the online machine should be transferred to the offline machine.



sudo systemctl stop firewalld
sudo systemctl disable firewalld


sudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config


sudo swapoff -a
sudo vi /etc/fstab

sudo tar xvf offlineApinizerInstallation-RHEL9.2.tar


Installing Containerd Packages

yum install -y --cacheonly --disablerepo=* required_rpms/*.rpm --skip-broken
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#containerd settings
sudo mkdir -p /etc/containerd   
 
sudo containerd config default | sudo tee /etc/containerd/config.toml
sudo sed -i 's/SystemdCgroup = false/SystemdCgroup = true/g' /etc/containerd/config.toml
 
 
#initializing and starting the containerd module 
sudo systemctl restart containerd
sudo systemctl enable containerd
systemctl status containerd
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Installing Kubernetes Packages

sudo modprobe overlay
sudo modprobe br_netfilter
 
sudo tee /etc/modules-load.d/k8s.conf <<EOF
overlay
br_netfilter
EOF

sudo vi /etc/sysctl.d/k8s.conf
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net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_forward=1
net.ipv4.tcp_max_syn_backlog=40000
net.core.somaxconn=40000
net.core.wmem_default=8388608
net.core.rmem_default=8388608
net.ipv4.tcp_sack=1
net.ipv4.tcp_window_scaling=1
net.ipv4.tcp_fin_timeout=15
net.ipv4.tcp_keepalive_intvl=30
net.ipv4.tcp_tw_reuse=1
net.ipv4.tcp_moderate_rcvbuf=1
net.core.rmem_max=134217728
net.core.wmem_max=134217728
net.ipv4.tcp_mem=134217728 134217728 134217728
net.ipv4.tcp_rmem=4096 277750 134217728
net.ipv4.tcp_wmem=4096 277750 134217728
net.core.netdev_max_backlog=300000
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sudo sysctl --system
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sudo yum install -y --cacheonly --disablerepo=* kube_rpms/*.rpm        
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systemctl enable --now kubelet.service
 
#Kubernetes installation control
kubectl version --client && kubeadm version
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Installing Kubernetes Images

sudo ctr --namespace k8s.io images import kube_images/kube-apiserver_v1.24.10.tar
sudo ctr --namespace k8s.io images import kube_images/kube-controller-manager_v1.24.10.tar
sudo ctr --namespace k8s.io images import kube_images/kube-scheduler_v1.24.10.tar
sudo ctr --namespace k8s.io images import kube_images/kube-proxy_v1.24.10.tar
sudo ctr --namespace k8s.io images import kube_images/pause_3.7.tar 
sudo ctr --namespace k8s.io images import kube_images/etcd_3.5.6-0.tar
sudo ctr --namespace k8s.io images import kube_images/coredns_v1.8.6.tar
sudo ctr --namespace k8s.io images import kube_images/flannel-cni-plugin_v1.1.2.tar
sudo ctr --namespace k8s.io images import kube_images/flannel_v0.20.2.tar

# Must be installed in case of error.
sudo ctr --namespace k8s.io images import kube_images/pause_3.6.tar
sudo ctr --namespace k8s.io images import kube_images/flannel_v0.24.2.tar
sudo ctr --namespace k8s.io images import kube_images/flannel-cni-plugin_v1.4.0-flannel1.tar
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Important: Make sure to perform DNS resolution with "nslookup" before initiating with kubeadm.


This node will be chosen as the Kubernetes Control Plane since it is the first node in the cluster.

sudo kubeadm init --pod-network-cidr="10.244.0.0/16" --control-plane-endpoint="<MASTER_SERVER_IP_ADDRESS>" --upload-certs --kubernetes-version=v1.24.10
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Creating Flannel

kubectl apply -f kube-flannel.yml
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Installing Apinizer Images

sudo tar xvf 2024.01.0-apinizer-image.tar
cd 2024.01.0
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sudo ctr --namespace k8s.io images import manager-2024.01.0.tar apinizercloud/manager:2024.01.0
sudo ctr --namespace k8s.io images import worker-2024.01.0.tar apinizercloud/worker:2024.01.0
sudo ctr --namespace k8s.io images import cache-2024.01.0.tar apinizercloud/cache:2024.01.0
sudo ctr --namespace k8s.io images import integration-2024.01.0.tar apinizercloud/integration:2024.01.0
sudo ctr --namespace k8s.io images import portal-2024.01.0.tar apinizercloud/portal:2024.01.0
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cd ..
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Installing MongoDB

sudo yum install -y --cacheonly --disablerepo=* mongo_rpms/*.rpm
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Note:  After the installation, the MongoDB configurations are the same as those in the document Installation of MongoDB on Red Hat OS.


Important: Perform the Apinizer installation through the Apinizer Installation and Configuration page.

Elasticsearch Installation

Important: After moving the installation file to the /opt/elasticsearch/ directory, follow all the steps in the Installation of Elasticsearch on Red Hat OS page.

sudo mkdir /opt/elasticsearch
cd elasticsearch

# Folder in the offline installation file
sudo mv elasticsearch-7.9.2-linux-x86_64.tar.gz /opt/elasticsearch/ 
 
 
cd /opt/elasticsearch
sudo tar -xzf elasticsearch-7.9.2-linux-x86_64.tar.gz

#After that, go to the elastic document but do not follow the first four steps in 2.2.
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