syntax = "proto3";

package dubbo.mesh.v1alpha1;

option go_package = "github.com/apache/dubbo-kubernetes/api/mesh/v1alpha1";

import "google/protobuf/wrappers.proto";
import "google/protobuf/struct.proto";
import "api/mesh/options.proto";

// Mesh defines configuration of a single mesh.
message Mesh {
  option (dubbo.mesh.resource).name = "MeshResource";
  option (dubbo.mesh.resource).type = "Mesh";
  option (dubbo.mesh.resource).package = "mesh";
  option (dubbo.mesh.resource).global = true;
  option (dubbo.mesh.resource).dds.send_to_zone = true;
  option (dubbo.mesh.resource).ws.name = "mesh";
  option (dubbo.mesh.resource).ws.plural = "meshes";
  option (dubbo.mesh.resource).allow_to_inspect = true;
  // mTLS settings of a Mesh.
  message Mtls {

    // Name of the enabled backend
    string enabledBackend = 1;

    // List of available Certificate Authority backends
    repeated CertificateAuthorityBackend backends = 2;
  }

  // mTLS settings.
  // +optional
  Mtls mtls = 1;

  // Tracing settings.
  // +optional
  Tracing tracing = 2;

  // Logging settings.
  // +optional
  Logging logging = 3;

  // Networking settings of the mesh
  Networking networking = 5;

  // Routing settings of the mesh
  Routing routing = 6;
}

// CertificateAuthorityBackend defines Certificate Authority backend
message CertificateAuthorityBackend {

  // Name of the backend
  string name = 1;

  // Type of the backend. Has to be one of the loaded plugins (Dubbo ships with
  // builtin and provided)
  string type = 2;

  // DpCert defines settings for certificates generated for Dataplanes
  message DpCert {
    // Rotation defines rotation settings for Dataplane certificate
    message Rotation {
      // Time after which generated certificate for Dataplane will expire
      string expiration = 1;
    }
    // Rotation settings
    Rotation rotation = 1;
  }

  // Dataplane certificate settings
  DpCert dpCert = 3;

  // Configuration of the backend
  google.protobuf.Struct conf = 4;
}

// Networking defines the networking configuration of the mesh
message Networking {

  // Outbound describes the common mesh outbound settings
  message Outbound {
    // Control the passthrough cluster
    google.protobuf.BoolValue passthrough = 1;
  }

  // Outbound settings
  Outbound outbound = 1;
}

// Tracing defines tracing configuration of the mesh.
message Tracing {

  // Name of the default backend
  string defaultBackend = 1;

  // List of available tracing backends
  repeated TracingBackend backends = 2;
}

// TracingBackend defines tracing backend available to mesh. Backends can be
// used in TrafficTrace rules.
message TracingBackend {
  // Name of the backend, can be then used in Mesh.tracing.defaultBackend or in
  // TrafficTrace
  string name = 1;

  // Percentage of traces that will be sent to the backend (range 0.0 - 100.0).
  // Empty value defaults to 100.0%
  google.protobuf.DoubleValue sampling = 2;

  // Type of the backend (Dubbo ships with 'zipkin')
  string type = 3;

  // Configuration of the backend
  google.protobuf.Struct conf = 4;
}

message ZipkinTracingBackendConfig {
  // Address of Zipkin collector.
  string url = 1;

  // Generate 128bit traces. Default: false
  bool traceId128bit = 2;

  // Version of the API. values: httpJson, httpJsonV1, httpProto. Default:
  // httpJson see
  // https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/trace/v3/trace.proto#envoy-v3-api-enum-config-trace-v3-zipkinconfig-collectorendpointversion
  string apiVersion = 3;

  // Determines whether client and server spans will share the same span
  // context. Default: true.
  // https://www.envoyproxy.io/docs/envoy/latest/api-v3/config/trace/v3/zipkin.proto#config-trace-v3-zipkinconfig
  google.protobuf.BoolValue sharedSpanContext = 4;
}

message Logging {

  // Name of the default backend
  string defaultBackend = 1;

  // List of available logging backends
  repeated LoggingBackend backends = 2;
}

// LoggingBackend defines logging backend available to mesh. Backends can be
// used in TrafficLog rules.
message LoggingBackend {
  // Name of the backend, can be then used in Mesh.logging.defaultBackend or in
  // TrafficLogging
  string name = 1;

  // Format of access logs. Placehodlers available on
  // https://www.envoyproxy.io/docs/envoy/latest/configuration/observability/access_log
  string format = 2;

  // Type of the backend (Dubbo ships with 'tcp' and 'file')
  string type = 3;

  // Configuration of the backend
  google.protobuf.Struct conf = 4;
}

// FileLoggingBackendConfig defines configuration for file based access logs
message FileLoggingBackendConfig {
  // Path to a file that logs will be written to
  string path = 1;
}

// TcpLoggingBackendConfig defines configuration for TCP based access logs
message TcpLoggingBackendConfig {
  // Address to TCP service that will receive logs
  string address = 1;
}

// Routing defines configuration for the routing in the mesh
message Routing {
  // Enable the Locality Aware Load Balancing
  bool localityAwareLoadBalancing = 1;

  // Enable routing traffic to services in other zone or external services
  // through ZoneEgress. Default: false
  bool zoneEgress = 2;
}