kubeadm init：failed to pull image registry.k8s.io/pause:3.6

错误信息：

Unfortunately, an error has occurred:
        timed out waiting for the condition

This error is likely caused by:
        - The kubelet is not running
        - The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
        - 'systemctl status kubelet'
        - 'journalctl -xeu kubelet'

Additionally, a control plane component may have crashed or exited when started by the container runtime.
To troubleshoot, list all containers using your preferred container runtimes CLI.
Here is one example how you may list all running Kubernetes containers by using crictl:
        - 'crictl --runtime-endpoint unix:///var/run/containerd/containerd.sock ps -a | grep kube | grep -v pause'
        Once you have found the failing container, you can inspect its logs with:
        - 'crictl --runtime-endpoint unix:///var/run/containerd/containerd.sock logs CONTAINERID'
couldn't initialize a Kubernetes cluster

查看出错原因：

journalctl -xeu kubelet | grep error

出错日志如下：

"Error syncing pod, skipping" err="failed to \"CreatePodSandbox\" for \"etcd-node1_kube-system(9de77c96e322a151c753f92a3e230dc0)\" with CreatePodSandboxError: \"Failed to create sandbox for pod \\\"etcd-node1_kube-system(9de77c96e322a151c753f92a3e230dc0)\\\": rpc error: code = DeadlineExceeded desc = failed to get sandbox image \\\"registry.k8s.io/pause:3.6\\\": failed to pull image \\\"registry.k8s.io/pause:3.6\\\": failed to pull and unpack image \\\"registry.k8s.io/pause:3.6\\\": failed to resolve reference \\\"registry.k8s.io/pause:3.6\\\": failed to do request: Head \\\"https://us-west2-docker.pkg.dev/v2/k8s-artifacts-prod/images/pause/manifests/3.6\\\": dial tcp 173.194.174.82:443: i/o timeout\"" pod="kube-system/etcd-node1" podUID=9de77c96e322a151c753f92a3e230dc0

出错原因分析：

拉取 registry.k8s.io/pause:3.6 镜像失败 导致sandbox 创建不了而报错

 解决方法：

# 生成 containerd 的默认配置文件

containerd config default > /etc/containerd/config.toml

# 查看 sandbox 的默认镜像仓库在文件中的第几行

cat /etc/containerd/config.toml | grep -n "sandbox_image"

# 使用 vim 编辑器 定位到 sandbox_image，将 仓库地址修改成 k8simage/pause:3.6

vim /etc/containerd/config.toml

sandbox_image = " registry.aliyuncs.com/google_containers/pause:3.6"

# 重启 containerd 服务

systemctl daemon-reload
systemctl restart containerd.service

# init

kubeadm init ......