Step 6. Configure a proxy for the cluster (optional)
Use a proxy server to create an indirect connection to network services for security and performance reasons. For example, you can use a proxy server to get through a firewall, and some proxies provide caching mechanisms.
To use a proxy server for the cluster, edit the proxy server for the Secure Agent. Exclude the metadata server on Google Cloud and the IP addresses that you plan to assign to the cluster.
After the changes take effect, the Secure Agent communicates with the metadata server and the cluster without passing through the proxy, while commands to communicate with the cluster are required to pass through the proxy.