Common Operations on All Nodes

Install Kubernetes cluster software, configure containerd, and perform other related operations on all master and worker nodes.

1. Change the host names to ensure that the host name of each server is unique.

   For example:

   • On the master node, change the host name to k8s-master.

     hostnamectl set-hostname k8s-master
     bash

   • On the worker node, change the host name to k8s-slave1.

     hostnamectl set-hostname k8s-slave1
     bash

2. Change the passwords of all servers to the same.
3. Disable the firewall.

   1 2	systemctl stop firewalld systemctl disable firewalld

4. Disable SWAP partitions.
   • Run the following command. The setting becomes invalid after the server restarts.

     1	swapoff -a

   • Comment out the code for automatic mounting of SWAP partitions in the fstab file. The setting is still valid after the server restarts.

     1	sed -i "/\/dev\/mapper\/openeuler-swap/ s|^|#|" /etc/fstab

5. Disable SELinux.

   1	sed -i "s|SELINUX=.*|SELINUX=disabled|g" /etc/selinux/config

6. Configure the source required for installing Kubernetes cluster software.

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   touch /etc/yum.repos.d/kubernetes.repo cat >/etc/yum.repos.d/kubernetes.repo <<EOF [kubernetes] name=Kubernetes baseurl=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/ enabled=1 gpgcheck=1 gpgkey=https://pkgs.k8s.io/core:/stable:/v1.28/rpm/repodata/repomd.xml.key EOF

7. Install Kubernetes cluster software.

   1 2	yum install -y kubelet kubeadm kubectl kubernetes-cni --disableexcludes=kubernetes systemctl enable --now kubelet

8. Install containerd and runC based on 1 to 3 in (Optional) Deploying the Containerd Environment. After the installation is successful, restart the Docker service based on 6 on the worker node.
9. Modify the containerd configuration file.

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   mkdir -p /etc/containerd/ cd /etc/containerd/ containerd config default > /etc/containerd/config.toml sed -i "s|SystemdCgroup =.*|SystemdCgroup = true|g" /etc/containerd/config.toml

10. Configure crictl and restart containerd.

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    echo "runtime-endpoint: unix:///run/containerd/containerd.sock" >> /etc/crictl.yaml echo "image-endpoint: unix:///run/containerd/containerd.sock" >> /etc/crictl.yaml echo "timeout: 10" >> /etc/crictl.yaml systemctl daemon-reload systemctl restart containerd

11. Configure network forwarding. Perform this step again after the server is restarted.

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    modprobe overlay modprobe br_netfilter echo "net.bridge.bridge-nf-call-ip6tables=1" >> /etc/sysctl.d/k8s.conf echo "net.bridge.bridge-nf-call-iptables=1" >> /etc/sysctl.d/k8s.conf echo "net.ipv4.ip_forward=1" >> /etc/sysctl.d/k8s.conf sysctl -p /etc/sysctl.d/k8s.conf