helm install incubator/fluentd-cloudwatch fails with Error: failed to download

我尝试安装 helm chart：
helm install incubator/fluentd-cloudwatch

我收到错误：
Error: failed to download "incubator/fluentd-cloudwatch" (hint: runninghelm 仓库更新may help)

helm repo update 没有帮助

默认情况下，helm 不包含孵化器图表。

要添加孵化器图表，运行：

$ helm repo add incubator http://storage.googleapis.com/kubernetes-charts-incubator

fluentd