We have multiple VPC networks with respect to the env type, like dev/sit/e2e/pre-prod/prod etc to isolate the workload. Each VPC network having multiple subnets. The core applications are built using the GCP services like GCE, GKE, Cloud Storage, Load balancer etc. The underlying databases of the application are still in the on-premise network and yet to be migrated in the GCP due to various issues. For Test/Dev env we are planning to use HA-VPN to communicate with the on-premise database and for prod & pre-prod we will use dedicated interconnect.
For our non-production & production env, we are evaluating the Hub & Spoke architecture where all the spoke VPC will connect to the Hub and the Hub VPC will connect to the on-premise network using either HA VPN or Dedicated Interconnect.
I'm not able to find out any good document or step by step guide to facilitate this architecture. If you can share your knowledge regarding how we can connect multiple VPC network with on-prem in most simplest way, it would be very much helpful for me.
I'm relative new on the GCP hybrid cloud architecture and we need to do PoC before providing the solution to the customer.
Thank you!!!
Setting up HA-VPN for each VPC may not be good solution. Need more precise way to connect multiple VPC network to On-prem network.
I would suggest you look into Shared VPC, although I don't know how feasible it is for you to make the switch now. But essentially it consists of a centrally managed VPC (your host project) in which you can create subnets and assign to other projects (called service projects) to use. So you can create a single VPN from your host project to your on-prem and have your service projects share it.