with the help of
kubectl config set-context --current --namespace=backendhostnamectl hostname pod-ctrl-3 --staticsudo setenforce 0
sudo sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
cat <<EOF | sudo tee /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.ipv4.ip_forward = 1
net.ipv6.conf.all.forwarding = 1
EOF
sudo sysctl --system
cat <<EOF | sudo tee /etc/modules-load.d/k8s.conf
overlay
br_netfilter
EOF
sudo modprobe overlay
sudo modprobe br_netfilter
dnf -y install dnf-utils
sudo yum-config-manager \
--add-repo \
https://download.docker.com/linux/centos/docker-ce.repo
sudo dnf repolist
sudo dnf makecache
sudo dnf -y install containerd.io
mv /etc/containerd/config.toml /etc/containerd/config.toml.original
sudo containerd config default > /etc/containerd/config.toml
sudo vim /etc/containerd/config.toml
SystemdCgroup = false with SystemdCgroup = truesudo systemctl enable --now containerdcat <<EOF | sudo tee /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=https://packages.cloud.google.com/yum/repos/kubernetes-el7-\$basearch
enabled=1
gpgcheck=1
gpgkey=https://packages.cloud.google.com/yum/doc/yum-key.gpg https://packages.cloud.google.com/yum/doc/rpm-package-key.gpg
exclude=kubelet kubeadm kubectl
EOF
sudo dnf repolist
sudo dnf makecache
sudo dnf install kubelet kubeadm kubectl --disableexcludes=kubernetes
sudo systemctl enable --now kubelet
sudo kubeadm config images pull
sudo firewall-cmd --add-port=6443/tcp --permanent
sudo firewall-cmd --add-port=2379-2380/tcp --permanent
sudo firewall-cmd --add-port=10250/tcp --permanent
sudo firewall-cmd --add-port=10259/tcp --permanent
sudo firewall-cmd --add-port=10257/tcp --permanent
sudo firewall-cmd --reload
sudo firewall-cmd --list-all
swapoff -asudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstabsudo firewall-cmd --add-port=10250/tcp --permanent
sudo firewall-cmd --add-port=30000-32767/tcp --permanent
sudo firewall-cmd --reload
sudo firewall-cmd --list-all