[Feature]: Replicated Gateways

[jvstme]

Problem

A gateway can have only one stateful replica, with no option to transfer or share its state with other replicas.

Supporting multiple replicas would be beneficial for:

• High availability.
• Migrating the gateway between instances.

Solution

Support replicated gateways.

Implementation plan:

• Basic replication (replicas property, provisioning, API, CLI, UI)
• replicas in-place update
  • Independent replica provisioning and termination (gateway replica pipeline)
  • State sync mechanism
  • Gateway apply plan
• Fault tolerance
  • Service/replica registration does not fail if some gateway replicas are unavailable
  • Service autoscaling works if some gateway replicas are unavailable
• Replicated gateways with ACM certificates

Workaround

No response

Would you like to help us implement this feature by sending a PR?

Yes