syntax = "proto3";

// See: https://github.com/grpc/grpc-go/blob/master/health/grpc_health_v1/health.proto
//
// We use the same health check service proto description defined in the gRPC documentation,
// including the authorization check. This requires our own implementation of the health
// package located in `manager/health`.
//
// For more infos, refer to:
// https://github.com/grpc/grpc/blob/master/doc/health-checking.md

package docker.swarmkit.v1;

import "gogoproto/gogo.proto";
import "github.com/docker/swarmkit/protobuf/plugin/plugin.proto";

service Health {
	rpc Check(HealthCheckRequest) returns (HealthCheckResponse) {
		option (docker.protobuf.plugin.tls_authorization) = { roles: "swarm-manager" };
	};
}

message HealthCheckRequest {
	string service = 1;
}

message HealthCheckResponse {
	enum ServingStatus {
		UNKNOWN = 0;
		SERVING = 1;
		NOT_SERVING = 2;
	}
	ServingStatus status = 1;
}