validate service connection: CRI v1 image API is not implemented for endpoint "unix:///var/run/containerd/containerd.sock\

执行kubeadm config images pull --config kubeadm.yaml时报以上错误，检查 /etc/containerd/config.toml 配置，发现如下：

disabled_plugins = ["cri"]

#root = "/var/lib/containerd"
#state = "/run/containerd"
#subreaper = true
#oom_score = 0

#[grpc]
#  address = "/run/containerd/containerd.sock"
#  uid = 0
#  gid = 0

#[debug]
#  address = "/run/containerd/debug.sock"
#  uid = 0
#  gid = 0
#  level = "info"

解决办法：注释掉唯一生效的配置“disabled_plguins=[“cri”]”即可，字面意思即知，这个配置是禁用CRI插件，与报错冲突，然后重启contained服务即可,如下：

sed -i -r '/cri/s/(.*)/#\1/' /etc/containerd/config.toml
systemctl restart containerd