// Copyright (c) HashiCorp, Inc.
// SPDX-License-Identifier: MPL-2.0

syntax = "proto3";

package hashicorp.consul.internal.service;

import "google/protobuf/struct.proto";
import "private/pbcommon/common.proto";
import "private/pbservice/healthcheck.proto";

// ConnectProxyConfig describes the configuration needed for any proxy managed
// or unmanaged. It describes a single logical service's listener and optionally
// upstreams and sidecar-related config for a single instance. To describe a
// centralized proxy that routed traffic for multiple services, a different one
// of these would be needed for each, sharing the same LogicalProxyID.
//
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.ConnectProxyConfig
// output=service.gen.go
// name=Structs
// ignore-fields=MutualTLSMode
message ConnectProxyConfig {
  // DestinationServiceName is required and is the name of the service to accept
  // traffic for.
  string DestinationServiceName = 1;

  // DestinationServiceID is optional and should only be specified for
  // "side-car" style proxies where the proxy is in front of just a single
  // instance of the service. It should be set to the service ID of the instance
  // being represented which must be registered to the same agent. It's valid to
  // provide a service ID that does not yet exist to avoid timing issues when
  // bootstrapping a service with a proxy.
  string DestinationServiceID = 2;

  // LocalServiceAddress is the address of the local service instance. It is
  // optional and should only be specified for "side-car" style proxies. It will
  // default to 127.0.0.1 if the proxy is a "side-car" (DestinationServiceID is
  // set) but otherwise will be ignored.
  string LocalServiceAddress = 3;

  // LocalServicePort is the port of the local service instance. It is optional
  // and should only be specified for "side-car" style proxies. It will default
  // to the registered port for the instance if the proxy is a "side-car"
  // (DestinationServiceID is set) but otherwise will be ignored.
  // mog: func-to=int func-from=int32
  int32 LocalServicePort = 4;

  // Config is the arbitrary configuration data provided with the proxy
  // registration.
  // mog: func-to=ProtobufTypesStructToMapStringInterface func-from=MapStringInterfaceToProtobufTypesStruct
  google.protobuf.Struct Config = 5;

  // Upstreams describes any upstream dependencies the proxy instance should
  // setup.
  // mog: func-to=UpstreamsToStructs func-from=NewUpstreamsFromStructs
  repeated Upstream Upstreams = 6;

  // MeshGateway defines the mesh gateway configuration for upstreams
  MeshGatewayConfig MeshGateway = 7;

  // Expose defines whether checks or paths are exposed through the proxy
  ExposeConfig Expose = 8;

  // Mode represents how the proxy's inbound and upstream listeners are dialed.
  // mog: func-to=structs.ProxyMode func-from=string
  string Mode = 9;

  // TransparentProxy defines configuration for when the proxy is in
  // transparent mode.
  TransparentProxyConfig TransparentProxy = 10;

  // LocalServiceSocketPath is the path to the unix domain socket for the local service instance
  string LocalServiceSocketPath = 11;

  // mog: func-to=EnvoyExtensionsToStructs func-from=EnvoyExtensionsFromStructs
  repeated hashicorp.consul.internal.common.EnvoyExtension EnvoyExtensions = 12;

  // AccessLogsConfig defines envoys access log configuration.
  AccessLogsConfig AccessLogs = 13;
}

// Upstream represents a single upstream dependency for a service or proxy. It
// describes the mechanism used to discover instances to communicate with (the
// Target) as well as any potential client configuration that may be useful such
// as load balancer options, timeouts etc.
//
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.Upstream
// output=service.gen.go
// name=Structs
// ignore-fields=IngressHosts
message Upstream {
  // Destination fields are the required ones for determining what this upstream
  // points to. Depending on DestinationType some other fields below might
  // further restrict the set of instances allowable.
  //
  // DestinationType would be better as an int constant but even with custom
  // JSON marshallers it causes havoc with all the mapstructure mangling we do
  // on service definitions in various places.
  string DestinationType = 1;
  string DestinationNamespace = 2;
  string DestinationPartition = 12;
  string DestinationPeer = 13;
  string DestinationName = 3;

  // Datacenter that the service discovery request should be run against. Note
  // for prepared queries, the actual results might be from a different
  // datacenter.
  string Datacenter = 4;

  // LocalBindAddress is the ip address a side-car proxy should listen on for
  // traffic destined for this upstream service. Default if empty is 127.0.0.1.
  string LocalBindAddress = 5;

  // LocalBindPort is the ip address a side-car proxy should listen on for
  // traffic destined for this upstream service. Required.
  // mog: func-to=int func-from=int32
  int32 LocalBindPort = 6;

  // Config is an opaque config that is specific to the proxy process being run.
  // It can be used to pass arbitrary configuration for this specific upstream
  // to the proxy.
  // mog: func-to=ProtobufTypesStructToMapStringInterface func-from=MapStringInterfaceToProtobufTypesStruct
  google.protobuf.Struct Config = 7;

  // MeshGateway is the configuration for mesh gateway usage of this upstream
  MeshGatewayConfig MeshGateway = 8;

  // CentrallyConfigured indicates whether the upstream was defined in a proxy
  // instance registration or whether it was generated from a config entry.
  bool CentrallyConfigured = 9;

  // LocalBindSocketPath is the socket to create to connect to the upstream service
  string LocalBindSocketPath = 10;
  string LocalBindSocketMode = 11;
}

// ServiceConnect are the shared Connect settings between all service
// definitions from the agent to the state store.
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.ServiceConnect
// output=service.gen.go
// name=Structs
message ServiceConnect {
  // Native is true when this service can natively understand Connect.
  bool Native = 1;

  reserved 2;

  // SidecarService is a nested Service Definition to register at the same time.
  // It's purely a convenience mechanism to allow specifying a sidecar service
  // along with the application service definition. It's nested nature allows
  // all of the fields to be defaulted which can reduce the amount of
  // boilerplate needed to register a sidecar service separately, but the end
  // result is identical to just making a second service registration via any
  // other means.
  // mog: func-to=ServiceDefinitionPtrToStructs func-from=NewServiceDefinitionPtrFromStructs
  ServiceDefinition SidecarService = 3;

  PeeringServiceMeta PeerMeta = 4;
}

// PeeringServiceMeta is read-only information provided from an exported peer.
//
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.PeeringServiceMeta
// output=service.gen.go
// name=Structs
message PeeringServiceMeta {
  repeated string SNI = 1;
  repeated string SpiffeID = 2;
  string Protocol = 3;
}

// ExposeConfig describes HTTP paths to expose through Envoy outside of Connect.
// Users can expose individual paths and/or all HTTP/GRPC paths for checks.
//
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.ExposeConfig
// output=service.gen.go
// name=Structs
message ExposeConfig {
  // Checks defines whether paths associated with Consul checks will be exposed.
  // This flag triggers exposing all HTTP and GRPC check paths registered for the service.
  bool Checks = 1;

  // Paths is the list of paths exposed through the proxy.
  // mog: func-to=ExposePathSliceToStructs func-from=NewExposePathSliceFromStructs
  repeated ExposePath Paths = 2;
}

// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.ExposePath
// output=service.gen.go
// name=Structs
message ExposePath {
  // ListenerPort defines the port of the proxy's listener for exposed paths.
  // mog: func-to=int func-from=int32
  int32 ListenerPort = 1;

  // ExposePath is the path to expose through the proxy, ie. "/metrics."
  string Path = 2;

  // LocalPathPort is the port that the service is listening on for the given path.
  // mog: func-to=int func-from=int32
  int32 LocalPathPort = 3;

  // Protocol describes the upstream's service protocol.
  // Valid values are "http" and "http2", defaults to "http"
  string Protocol = 4;

  // ParsedFromCheck is set if this path was parsed from a registered check
  bool ParsedFromCheck = 5;
}

// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.MeshGatewayConfig
// output=service.gen.go
// name=Structs
message MeshGatewayConfig {
  // mog: func-to=structs.MeshGatewayMode func-from=string
  string Mode = 1;
}

// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.TransparentProxyConfig
// output=service.gen.go
// name=Structs
message TransparentProxyConfig {
  // mog: func-to=int func-from=int32
  int32 OutboundListenerPort = 1;

  // DialedDirectly indicates whether transparent proxies can dial this proxy instance directly.
  // The discovery chain is not considered when dialing a service instance directly.
  // This setting is useful when addressing stateful services, such as a database cluster with a leader node.
  bool DialedDirectly = 2;
}

// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.AccessLogsConfig
// output=service.gen.go
// name=Structs
message AccessLogsConfig {
  bool Enabled = 1;
  bool DisableListenerLogs = 2;

  // Type represents the desired envoy log sink (e.g. stdout, stderr, file ...).
  // mog: func-to=structs.LogSinkType func-from=string
  string Type = 3;

  string Path = 4;
  string JSONFormat = 5;
  string TextFormat = 6;
}

// ServiceDefinition is used to JSON decode the Service definitions. For
// documentation on specific fields see NodeService which is better documented.
//
// mog annotation:
//
// target=github.com/hashicorp/consul/agent/structs.ServiceDefinition
// output=service.gen.go
// name=Structs
message ServiceDefinition {
  // mog: func-to=structs.ServiceKind func-from=string
  string Kind = 1;
  string ID = 2;
  string Name = 3;
  repeated string Tags = 4;
  string Address = 5;
  // mog: func-to=MapStringServiceAddressToStructs func-from=NewMapStringServiceAddressFromStructs
  map<string, ServiceAddress> TaggedAddresses = 16;
  map<string, string> Meta = 6;
  // mog: func-to=int func-from=int32
  int32 Port = 7;
  // Path for socket
  string SocketPath = 18;
  CheckType Check = 8;
  // mog: func-to=CheckTypesToStructs func-from=NewCheckTypesFromStructs
  repeated CheckType Checks = 9;
  // mog: func-to=WeightsPtrToStructs func-from=NewWeightsPtrFromStructs
  Weights Weights = 10;
  string Token = 11;
  bool EnableTagOverride = 12;

  // Proxy is the configuration set for Kind = connect-proxy. It is mandatory in
  // that case and an error to be set for any other kind. This config is part of
  // a proxy service definition and is distinct from but shares some fields with
  // the Connect.Proxy which configures a managed proxy as part of the actual
  // service's definition. This duplication is ugly but seemed better than the
  // alternative which was to re-use the same struct fields for both cases even
  // though the semantics are different and the non-shared fields make no sense
  // in the other case. ProxyConfig may be a more natural name here, but it's
  // confusing for the UX because one of the fields in ConnectProxyConfig is
  // also called just "Config"
  // mog: func-to=ConnectProxyConfigPtrToStructs func-from=NewConnectProxyConfigPtrFromStructs
  ConnectProxyConfig Proxy = 14;

  // mog: func-to=EnterpriseMetaToStructs func-from=NewEnterpriseMetaFromStructs
  common.EnterpriseMeta EnterpriseMeta = 17;

  // mog: func-to=ServiceConnectPtrToStructs func-from=NewServiceConnectPtrFromStructs
  ServiceConnect Connect = 15;

  // Locality identifies where the service is running.
  // mog: func-to=LocalityToStructs func-from=LocalityFromStructs
  common.Locality Locality = 19;
}

// Type to hold an address and port of a service
message ServiceAddress {
  string Address = 1;
  // mog: func-to=int func-from=int32
  int32 Port = 2;
}

// Weights represent the weight used by DNS for a given status
message Weights {
  // mog: func-to=int func-from=int32
  int32 Passing = 1;
  // mog: func-to=int func-from=int32
  int32 Warning = 2;
}