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Answer: Use Traffic Director with a sidecar proxy to connect the application to the service., Configure the legacy service's firewall to allow health checks originating from the proxy.
The correct answers are A and C. Traffic Director with a sidecar proxy (A) provides resilience by enabling global load balancing across the two legacy service clusters and allows health checks via the sidecar. The firewall for the legacy service must permit health check traffic from the sidecar proxies (C), as they initiate the checks. Proxyless configurations (B) are for gRPC, not REST. Health checks do not originate from the application (D) or Traffic Director's control plane (E) but from the proxies or Google's health check IPs, which are not listed in the options, making C the best fit.
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How can you establish a resilient connection between your application on a Google Kubernetes Engine (GKE) cluster and a legacy REST service deployed across two GKE clusters in different regions, while also enabling health checks on a separate port for the legacy service? (Select two correct approaches.)
A
Use Traffic Director with a sidecar proxy to connect the application to the service.
B
Use a proxyless Traffic Director configuration to connect the application to the service.
C
Configure the legacy service's firewall to allow health checks originating from the proxy.
D
Configure the legacy service's firewall to allow health checks originating from the application.
E
Configure the legacy service's firewall to allow health checks originating from the Traffic Director control plane.
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