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Michael Aspinwall
510761bfc7
Fixes #565 Replaces standard DNS resolution (`dns:///`) and the forced 1-minute `MaxConnectionAge` reconnect workaround with a native, event-driven Kubernetes gRPC resolver (`internal/k8sresolver`). The resolver uses client-go's `SharedInformerFactory` and `EndpointSliceLister` to watch `discoveryv1.EndpointSlice` resources in real time. ### Verification Created a kind cluster to test changes by scaling the deployments up and down and verified the new servers were connected to by clients. #### 1. Kind Cluster Scale-Out & EndpointSlice Discovery Click to view kubectl scale and EndpointSlice output $ kubectl scale deployment/ate-api-server -n ate-system --replicas=4 deployment.apps/ate-api-server scaled $ kubectl get pods -n ate-system -l app=ate-api-server NAME READY STATUS RESTARTS AGE ate-api-server-6bcd9fddbb-gxxth 1/1 Running 0 3m8s ate-api-server-6bcd9fddbb-jgwbw 1/1 Running 0 3m8s ate-api-server-6bcd9fddbb-m8nbx 1/1 Running 0 7m20s ate-api-server-6bcd9fddbb-vwm2g 1/1 Running 0 7m20s $ kubectl get endpointslices -n ate-system -l kubernetes.io/service-name=api NAME ADDRESSTYPE PORTS ENDPOINTS api-dmzfc IPv4 443 10.244.0.15,10.244.0.19,10.244.0.31,10.244.0.32 #### 2. Proof of Active gRPC Load-Balancing Across All Replicas ``` [pod/ate-api-server-6bcd9fddbb-gxxth] {"time":"2026-07-29T13:20:49Z","level":"INFO","msg":"Handle RPC","method":"/ateapi.Control/ListActors","principal":{"ID":"spiffe://cluster.local/ns/ate-system/sa/atenet-router"}} [pod/ate-api-server-6bcd9fddbb-jgwbw] {"time":"2026-07-29T13:20:46Z","level":"INFO","msg":"Handle RPC","method":"/ateapi.Control/ListActors","principal":{"ID":"spiffe://cluster.local/ns/ate-system/sa/atenet-router"}} [pod/ate-api-server-6bcd9fddbb-m8nbx] {"time":"2026-07-29T13:20:48Z","level":"INFO","msg":"Handle RPC","method":"/ateapi.Control/ListActors","principal":{"ID":"spiffe://cluster.local/ns/ate-system/sa/atenet-router"}} [pod/ate-api-server-6bcd9fddbb-vwm2g] {"time":"2026-07-29T13:20:47Z","level":"INFO","msg":"Handle RPC","method":"/ateapi.Control/ListActors","principal":{"ID":"spiffe://cluster.local/ns/ate-system/sa/atenet-router"}} ```