Creating a single control-plane cluster with kubeadm v1.22

k8s1.20后使用runtime做为pod的运行

参考：https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/create-cluster-kubeadm/

环境

ubuntu 18.04,k8s 1.22, runtime

部署

一、Installing kubeadm

参考：https://kubernetes.io/docs/setup/production-environment/tools/kubeadm/install-kubeadm/

1.Letting iptables see bridged traffic

Make sure that the br_netfilter module is loaded. This can be done by running lsmod | grep br_netfilter.

2.Installing runtime

参考：https://kubernetes.io/docs/setup/production-environment/container-runtimes/#containerd

This section contains the necessary steps to use containerd as CRI runtime.

Use the following commands to install Containerd on your system:

Install and configure prerequisites:

cat <<EOF | sudo tee /etc/modules-load.d/containerd.conf
overlay
br_netfilter
EOF

sudo modprobe overlay
sudo modprobe br_netfilter

# Setup required sysctl params, these persist across reboots.
cat <<EOF | sudo tee /etc/sysctl.d/99-kubernetes-cri.conf
net.bridge.bridge-nf-call-iptables  = 1
net.ipv4.ip_forward                 = 1
net.bridge.bridge-nf-call-ip6tables = 1
EOF

# Apply sysctl params without reboot
sudo sysctl --system

Install containerd:

1. Install the containerd.io package from the official Docker repositories. Instructions for setting up the Docker repository for your respective Linux distribution and installing the containerd.io package can be found at Install Docker Engine. (因为系统是ubuntu，所以点击ubuntu选项)
2. Configure containerd:

   sudo mkdir -p /etc/containerd
   containerd config default | sudo tee /etc/containerd/config.toml

3. Restart containerd:

   sudo systemctl restart containerd

3.Installing kubeadm, kubelet and kubectl

4.Configuring a cgroup driver

Both the container runtime and the kubelet have a property called "cgroup driver", which is important for the management of cgroups on Linux machines.