v2

Documentation

Index

• Constants
• type Config
  • func (cfg *Config) RegisterFlags(f *flag.FlagSet, logger log.Logger)
  • func (cfg *Config) Validate() error
• type Frontend
  • func NewFrontend(cfg Config, limits Limits, log log.Logger, reg prometheus.Registerer, ...) (*Frontend, error)
  • func (f *Frontend) CheckReady(_ context.Context) error
  • func (f *Frontend) QueryResult(ctx context.Context, qrReq *frontendv2pb.QueryResultRequest) (*frontendv2pb.QueryResultResponse, error)
  • func (f *Frontend) QueryResultStream(stream frontendv2pb.FrontendForQuerier_QueryResultStreamServer) (err error)
  • func (f *Frontend) RoundTripGRPC(ctx context.Context, req *httpgrpc.HTTPRequest) (*httpgrpc.HTTPResponse, io.ReadCloser, error)
• type Limits

Constants

const ShouldQueryIngestersAndStoreGatewayQueueDimension = "ingester-and-store-gateway"

const ShouldQueryIngestersQueueDimension = "ingester"

const ShouldQueryStoreGatewayQueueDimension = "store-gateway"

Types

type Config

type Config struct {
	SchedulerAddress  string            `yaml:"scheduler_address"`
	DNSLookupPeriod   time.Duration     `yaml:"scheduler_dns_lookup_period" category:"advanced"`
	WorkerConcurrency int               `yaml:"scheduler_worker_concurrency" category:"advanced"`
	GRPCClientConfig  grpcclient.Config `` /* 144-byte string literal not displayed */

	// Used to find local IP address, that is sent to scheduler and querier-worker.
	InfNames   []string `yaml:"instance_interface_names" category:"advanced" doc:"default=[<private network interfaces>]"`
	EnableIPv6 bool     `yaml:"instance_enable_ipv6" category:"advanced"`

	// If set, address is not computed from interfaces.
	Addr string `yaml:"address" category:"advanced"`
	Port int    `category:"advanced"`

	// These configuration options are injected internally.
	QuerySchedulerDiscovery schedulerdiscovery.Config `yaml:"-"`
	LookBackDelta           time.Duration             `yaml:"-"`
	QueryStoreAfter         time.Duration             `yaml:"-"`
}

Config for a Frontend.

func (*Config) RegisterFlags

func (cfg *Config) RegisterFlags(f *flag.FlagSet, logger log.Logger)

func (*Config) Validate

func (cfg *Config) Validate() error

type Frontend

type Frontend struct {
	services.Service
	// contains filtered or unexported fields
}

Frontend implements GrpcRoundTripper. It queues HTTP requests, dispatches them to backends via gRPC, and handles retries for requests which failed.

func NewFrontend

func NewFrontend(cfg Config, limits Limits, log log.Logger, reg prometheus.Registerer, codec querymiddleware.Codec) (*Frontend, error)

NewFrontend creates a new frontend.

func (*Frontend) CheckReady

func (f *Frontend) CheckReady(_ context.Context) error

CheckReady determines if the query frontend is ready. Function parameters/return chosen to match the same method in the ingester

func (*Frontend) QueryResult

func (f *Frontend) QueryResult(ctx context.Context, qrReq *frontendv2pb.QueryResultRequest) (*frontendv2pb.QueryResultResponse, error)

func (*Frontend) QueryResultStream

func (f *Frontend) QueryResultStream(stream frontendv2pb.FrontendForQuerier_QueryResultStreamServer) (err error)

func (*Frontend) RoundTripGRPC

func (f *Frontend) RoundTripGRPC(ctx context.Context, req *httpgrpc.HTTPRequest) (*httpgrpc.HTTPResponse, io.ReadCloser, error)

RoundTripGRPC round trips a proto (instead of an HTTP request).

type Limits

type Limits interface {
	// QueryIngestersWithin returns the maximum lookback beyond which queries are not sent to ingester.
	QueryIngestersWithin(user string) time.Duration
}