在docker for windows中使用helm报错，原因为 tiller 的镜像拉取失败。处理方法如下：
1.查看 tiller-deploy-xxx容器名称：kubectl get pods --namespace kube-system
2.查看详细内容：kubectl --namespace kube-system describe pod tiller-deploy-7d6dbd958-sb92l
可以看到错误内容：
Normal Scheduled 22m default-scheduler Successfully assigned kube-system/tiller-deploy-7d6dbd958-sb92l to docker-desktop
Normal Pulling 20m (x4 over 22m) kubelet, docker-desktop Pulling image "gcr.io/kubernetes-helm/tiller:v2.16.6"
Warning Failed 19m (x4 over 22m) kubelet, docker-desktop Failed to pull image "gcr.io/kubernetes-helm/tiller:v2.16.6": rpc error: code = Unknown desc = Error response from daemon: Get https://gcr.io/v2/: net/http: request canceled while waiting for connection (Client.Timeout exceeded while awaiting headers)
Warning Failed 19m (x4 over 22m) kubelet, docker-desktop Error: ErrImagePull
Normal BackOff 17m (x15 over 22m) kubelet, docker-desktop Back-off pulling image "gcr.io/kubernetes-helm/tiller:v2.16.6"
Warning Failed 7m10s (x56 over 22m) kubelet, docker-desktop Error: ImagePullBackOff
3.通过阿里云拉取镜像重命名
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.6
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.6 gcr.io/kubernetes-helm/tiller:v2.16.6
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/tiller:v2.16.6
4.重启容器tiller-deploy-xxx