- OS: Ubuntu 16.04 (will be updated with additional distros after testing)
- Python: 2.7+
- Ansible: 2.4+
安裝最新版的 Ansible：
$ sudo apt update
$ sudo apt install software-properties-common
$ sudo apt-add-repository --yes --update ppa:ansible/ansible
$ sudo apt install ansible
添加要部署的主機位址，以及其相關資訊：
$ sudo vi /etc/ansible/hosts
[k8s]
192.168.20.39 ansible_become_pass=123
192.168.20.40 ansible_user=beladmin ansible_ssh_pass=123 ansible_become_pass=123
192.168.20.41 ansible_user=beladmin ansible_ssh_pass=123 ansible_become_pass=123
克隆專案，並進入到 Ansible 安裝目錄：
$ git clone https://github.com/containerd/cri
$ cd ./cri/contrib/ansible
因為 Ansible 2.7（提交歷史） state 不支援 installed，將該區塊的 state=installed 修改成 state=present：
$ vi tasks/k8s.yaml
- name: "Install kubelet, kubeadm, kubectl (Ubuntu)"
apt: name={{item}} state=present
使用 yaml 劇本開始部署：
$ ansible-playbook cri-containerd.yaml
關閉 swap：
$ sudo swapoff -a && sudo sysctl -w vm.swappiness=0
初始化 kubernetes，並創建相關文件：
$ sudo kubeadm init --pod-network-cidr=10.244.0.0/16
$ mkdir -p $HOME/.kube
$ sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
$ sudo chown $(id -u):$(id -g) $HOME/.kube/config
配置網路插件：
$ kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
創建加入群集指示物：
$ sudo kubeadm token create --print-join-command
守護進程重載入，重啟 kubelet ：
$ sudo systemctl daemon-reload
$ sudo systemctl restart kubelet
錯誤訊息：
[ERROR Swap]: running with swap on is not supported. Please disable swap
解決方法：
$ sudo swapoff -a && sudo sysctl -w vm.swappiness=0
錯誤訊息：
[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
解決方法：
$ sudo modprobe br_netfilter
Even if kubelet already has the containerd socket configured, kubeadm also needs to be pointed at the CRI socket of containerd to dispatch all runtime related operations to containerd (eg. pulling Kubernetes images).
kubeadm init --ignore-preflight-errors=all --cri-socket /run/containerd/containerd.sock --pod-network-cidr=10.211.0.0/16