doc: connection between proxy and on-premises

[chintansakhiya]

How to Connect a Proxy to an On-Premises Cluster

Here are some easy ways to establish a connection between a proxy and an on-premises cluster:

1. gRPC with Streaming

• Keep a persistent connection using gRPC streams.
• Ideal for high-performance and reliable communication.

2. WebSocket (Recommended for Simplicity)

• Set up a WebSocket connection from the on-premises proxy agent to the cloud proxy.
• Enables easy and two-way communication.

3. SSH Tunnel (Takes Extra configration Time)

• Create a secure SSH tunnel from the on-premises proxy agent to the cloud proxy.
• Useful for secure and private communication, though it requires more configuration.