安裝 CRI 客戶端 crictl

# https://github.com/kubernetes-sigs/cri-tools/releases/ 選擇版本
wget https://github.com/kubernetes-sigs/cri-tools/releases/download/v1.20.0/crictl-v1.20.0-linux-amd64.tar.gz
sudo tar zxvf crictl-v1.20.0-linux-amd64.tar.gz -C /usr/local/bin

vi /etc/crictl.yaml 
runtime-endpoint: unix:///run/containerd/containerd.sock
image-endpoint: unix:///run/containerd/containerd.sock
timeout: 10
debug: false

# 驗證是否可用
crictl  pull nginx:alpine
crictl  rmi  nginx:alpine
crictl  images