Cross datacenter communication using a mesh gateway
A method for cross datacenter service-to-service communication over a shortest network route using mesh gateways. A mesh gateway receives a protocol message from a first service directed to a second service, identifies destination information associated with the second service, recognizes a routing configuration for routing the protocol message, determines a network route based on the routing configuration, and forwards the protocol message to another gateway associated with the second service over the determined network route.
1. A method comprising:
receiving, by a first gateway device, a protocol message directed to a service within a target datacenter from a plurality of datacenters;
identifying, by the first gateway device, destination information of the service and the target datacenter;
determining, by the first gateway device, a routing configuration for routing the protocol message to the target datacenter, wherein the routing configuration is a multi-hop routing;
determining, by the first gateway device, a network route for routing the protocol message to the target datacenter based on the routing configuration;
identifying, by the first gateway device, a route with a shortest total distance to the target datacenter, whereupon determining the routing configuration further comprises:
determining, by the first gateway device, one or more distances to one or more next-hop datacenters and to the target datacenter as provided by the one or more next-hop datacenters, each distance being calculated based on the round trip time (RTT) recorded between all datacenters, wherein the RTT is calculated using a Wireless Area Network (WAN) gossip protocol;
identifying, by the first gateway device, the network route with the shortest total distance to the target datacenter from the one or more total distances; and
transmitting, by the first gateway device, the protocol message to a second gateway device associated with the target datacenter through the determined network route.
2. The method in accordance with claim 1 , wherein the determining the one or more distances to the one or more next-hop datacenters further comprises calculating the one or more distances to the one or more next-hop datacenters using network coordinates of the datacenter associated with the first gateway device and the one or more next-hop datacenters.
3. The method in accordance with claim 1 , further comprising filtering, by the first gateway device, a reference to the first gateway device from the network route for routing the protocol message to prevent cyclical routes.
4. The method in accordance with claim 1 , wherein the protocol message is a part of a Transport Layer Security (TLS)-Server Name Indication (SNI) handshake originated from a client service.
5. The method in accordance with claim 1 , wherein the first gateway device identifies the destination information of the service and the target datacenter by sniffing into the protocol message.
6. The method in accordance with claim 1 , wherein the destination information associated with the service and the target datacenter is included in a SNI header of the protocol message, and determined via TLS-SNI handshake.
7. The method in accordance with claim 1 , wherein the first gateway device uses at least one of a Local Area Network (LAN) and a Wide Area Network (WAN) Internet Protocol (IP) address to route the protocol message to the service within the target datacenter.
8. The method in accordance with claim 1 , wherein the first gateway device uses at least one of a layer 4 and a layer 7 load balancing protocols for routing the protocol message.