client

Documentation

Index

• Constants
• Variables
• type Client
  • func New(metrics *Metrics, cfg Config, maxStreams, maxLineSize int, ...) (Client, error)
  • func NewLogger(metrics *Metrics, log log.Logger, cfgs ...Config) (Client, error)
  • func NewWithTripperware(metrics *Metrics, cfg Config, maxStreams, maxLineSize int, ...) (Client, error)
• type Config
  • func (c *Config) RegisterFlags(flags *flag.FlagSet)
  • func (c *Config) RegisterFlagsWithPrefix(prefix string, f *flag.FlagSet)
  • func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error
• type Manager
  • func NewManager(metrics *Metrics, logger log.Logger, limits limit.Config, ...) (*Manager, error)
  • func (m *Manager) Chan() chan<- api.Entry
  • func (m *Manager) Name() string
  • func (m *Manager) Stop()
  • func (m *Manager) StopNow()
• type Metrics
  • func NewMetrics(reg prometheus.Registerer) *Metrics
• type Stoppable
• type Tripperware
• type WriterEventsNotifier

Constants

const (

	// Label reserved to override the tenant ID while processing
	// pipeline stages
	ReservedLabelTenantID = "__tenant_id__"

	LatencyLabel = "filename"
	HostLabel    = "host"
	ClientLabel  = "client"
	TenantLabel  = "tenant"
	ReasonLabel  = "reason"

	ReasonGeneric       = "ingester_error"
	ReasonRateLimited   = "rate_limited"
	ReasonStreamLimited = "stream_limited"
	ReasonLineTooLong   = "line_too_long"
)

const (
	BatchWait      = 1 * time.Second
	BatchSize  int = 1024 * 1024
	MinBackoff     = 500 * time.Millisecond
	MaxBackoff     = 5 * time.Minute
	MaxRetries int = 10
	Timeout        = 10 * time.Second
)

NOTE the helm chart for promtail and fluent-bit also have defaults for these values, please update to match if you make changes here.

Variables

var (
	// NilNotifier is a no-op WriterEventsNotifier.
	NilNotifier = nilNotifier{}
)

var Reasons = []string{ReasonGeneric, ReasonRateLimited, ReasonStreamLimited, ReasonLineTooLong}

var UserAgent = fmt.Sprintf("promtail/%s", build.Version)

Types

type Client

type Client interface {
	api.EntryHandler
	// Stop goroutine sending batch of entries without retries.
	StopNow()
	Name() string
}

Client pushes entries to Loki and can be stopped

func New

func New(metrics *Metrics, cfg Config, maxStreams, maxLineSize int, maxLineSizeTruncate bool, logger log.Logger) (Client, error)

New makes a new Client.

func NewLogger

func NewLogger(metrics *Metrics, log log.Logger, cfgs ...Config) (Client, error)

NewLogger creates a new client logger that logs entries instead of sending them.

func NewWithTripperware

func NewWithTripperware(metrics *Metrics, cfg Config, maxStreams, maxLineSize int, maxLineSizeTruncate bool, logger log.Logger, tp Tripperware) (Client, error)

NewWithTripperware creates a new Loki client with a custom tripperware.

type Config

type Config struct {
	Name      string `yaml:"name,omitempty"`
	URL       flagext.URLValue
	BatchWait time.Duration `yaml:"batchwait"`
	BatchSize int           `yaml:"batchsize"`

	Client  config.HTTPClientConfig `yaml:",inline"`
	Headers map[string]string       `yaml:"headers,omitempty"`

	BackoffConfig backoff.Config `yaml:"backoff_config"`
	// The labels to add to any time series or alerts when communicating with loki
	ExternalLabels lokiflag.LabelSet `yaml:"external_labels,omitempty"`
	Timeout        time.Duration     `yaml:"timeout"`

	// The tenant ID to use when pushing logs to Loki (empty string means
	// single tenant mode)
	TenantID string `yaml:"tenant_id"`

	// When enabled, Promtail will not retry batches that get a
	// 429 'Too Many Requests' response from the distributor. Helps
	// prevent HOL blocking in multitenant deployments.
	DropRateLimitedBatches bool `yaml:"drop_rate_limited_batches"`
}

Config describes configuration for an HTTP pusher client.

func (*Config) RegisterFlags

func (c *Config) RegisterFlags(flags *flag.FlagSet)

RegisterFlags registers flags.

func (*Config) RegisterFlagsWithPrefix

func (c *Config) RegisterFlagsWithPrefix(prefix string, f *flag.FlagSet)

RegisterFlags with prefix registers flags where every name is prefixed by prefix. If prefix is a non-empty string, prefix should end with a period.

func (*Config) UnmarshalYAML

func (c *Config) UnmarshalYAML(unmarshal func(interface{}) error) error

UnmarshalYAML implement Yaml Unmarshaler

type Manager

type Manager struct {
	// contains filtered or unexported fields
}

Manager manages remote write client instantiation, and connects the related components to orchestrate the flow of api.Entry from the scrape targets, to the remote write clients themselves.

Right now it just supports instantiating the WAL writer side of the future-to-be WAL enabled client. In follow-up work, tracked in https://github.com/grafana/loki/issues/8197, this Manager will be responsible for instantiating all client types: Logger, Multi and WAL.

func NewManager

func NewManager(metrics *Metrics, logger log.Logger, limits limit.Config, reg prometheus.Registerer, walCfg wal.Config, notifier WriterEventsNotifier, clientCfgs ...Config) (*Manager, error)

NewManager creates a new Manager

func (*Manager) Chan

func (m *Manager) Chan() chan<- api.Entry

func (*Manager) Name

func (m *Manager) Name() string

func (*Manager) Stop

func (m *Manager) Stop()

func (*Manager) StopNow

func (m *Manager) StopNow()

type Metrics

type Metrics struct {
	// contains filtered or unexported fields
}

func NewMetrics

func NewMetrics(reg prometheus.Registerer) *Metrics

type Stoppable

type Stoppable interface {
	Stop()
}

type Tripperware

type Tripperware func(http.RoundTripper) http.RoundTripper

Tripperware can wrap a roundtripper.

type WriterEventsNotifier

type WriterEventsNotifier interface {
	SubscribeCleanup(subscriber wal.CleanupEventSubscriber)
	SubscribeWrite(subscriber wal.WriteEventSubscriber)
}

WriterEventsNotifier implements a notifier that's received by the Manager, to which wal.Watcher can subscribe for writer events.