loki/pkg/logproto/logproto.proto

syntax = "proto3";

package logproto;

import "google/protobuf/timestamp.proto";
import "github.com/gogo/protobuf/gogoproto/gogo.proto";

service Pusher {
  rpc Push(PushRequest) returns (PushResponse) {};
}

service Querier {
  rpc Query(QueryRequest) returns (stream QueryResponse) {};
  rpc Label(LabelRequest) returns (LabelResponse) {};
  rpc Tail(TailRequest) returns (stream TailResponse) {};
}

message PushRequest {
  repeated Stream streams = 1 [(gogoproto.jsontag) = "streams"];
}

message PushResponse {
}

message QueryRequest {
  string query = 1;
  uint32 limit = 2;
  google.protobuf.Timestamp start = 3 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
  google.protobuf.Timestamp end = 4 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
  Direction direction = 5;
  string regex = 6;
}

enum Direction {
  FORWARD = 0;
  BACKWARD = 1;
}

message QueryResponse {
  repeated Stream streams = 1;
}

message LabelRequest {
  string name = 1;
  bool values = 2; // True to fetch label values, false for fetch labels names.
}

message LabelResponse {
  repeated string values = 1;
}

message Stream {
  string labels = 1 [(gogoproto.jsontag) = "labels"];
  repeated Entry entries = 2 [(gogoproto.nullable) = false, (gogoproto.jsontag) = "entries"];
}

message Entry {
  google.protobuf.Timestamp timestamp = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false, (gogoproto.jsontag) = "ts"];
  string line = 2 [(gogoproto.jsontag) = "line"];
}

message TailRequest {
  string query = 1;
  string regex = 2;
  uint32 delayFor = 3;
}

message TailResponse {
  Stream stream = 1;
  repeated DroppedStream droppedStreams = 2;
}

message DroppedStream {
  google.protobuf.Timestamp from = 1 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
  google.protobuf.Timestamp to = 2 [(gogoproto.stdtime) = true, (gogoproto.nullable) = false];
  string labels = 3;
}