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Fix: Handle empty string healthcheck as readiness healthcheck #1402

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merged 2 commits into from
Aug 19, 2025
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Fix: Handle empty string healthcheck as readiness healthcheck #1402

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Fix: Handle empty string healthcheck as overall healthcheck
yangligt2 Aug 18, 2025
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yangligt2 Aug 18, 2025
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7 changes: 6 additions & 1 deletion cmd/epp/runner/health.go
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Original file line number Diff line number Diff line change
Expand Up @@ -65,7 +65,12 @@ func (s *healthServer) Check(ctx context.Context, in *healthPb.HealthCheckReques
case ReadinessCheckService:
checkName = "readiness"
isPassing = isLive && s.isLeader.Load()
case LivenessCheckService, "": // Default to liveness check if service is empty
case "": // Handle overall server health for load balancers that use an empty service name.
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very very minor, non-blocking nit: move the empty string case to the bottom of the list

checkName = "empty service name (considered as overall health)"
// The overall health for a load balancer should reflect readiness to accept traffic,
// which is true only for the leader pod that has synced its data.
isPassing = isLive && s.isLeader.Load()
case LivenessCheckService:
checkName = "liveness"
// Any pod that is running and can respond to this gRPC check is considered "live".
// The datastore sync status should not affect liveness, only readiness.
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