httpd

Documentation

Overview

Package httpd implements the HTTP service and REST API for InfluxDB.

Index

• Constants
• func LimitListener(l net.Listener, n int) net.Listener
• func WriteError(w ResponseWriter, err error) (int, error)
• type AuthenticationMethod
• type Config
  • func NewConfig() Config
  • func (c Config) Diagnostics() (*diagnostics.Diagnostics, error)
• type Handler
  • func NewHandler(c Config) *Handler
  • func (h *Handler) AddRoutes(routes ...Route)
  • func (h *Handler) Close()
  • func (h *Handler) Open()
  • func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request)
  • func (h *Handler) Statistics(tags map[string]string) []models.Statistic
• type RequestInfo
  • func (r *RequestInfo) String() string
• type RequestProfile
  • func (p *RequestProfile) AddQuery(info RequestInfo)
  • func (p *RequestProfile) AddWrite(info RequestInfo)
  • func (p *RequestProfile) Stop()
• type RequestStats
• type RequestTracker
  • func NewRequestTracker() *RequestTracker
  • func (rt *RequestTracker) Add(req *http.Request, user meta.User)
  • func (rt *RequestTracker) TrackRequests() *RequestProfile
• type Response
  • func (r *Response) Error() error
  • func (r Response) MarshalJSON() ([]byte, error)
  • func (r *Response) UnmarshalJSON(b []byte) error
• type ResponseWriter
  • func NewResponseWriter(w http.ResponseWriter, r *http.Request) ResponseWriter
• type Route
• type Service
  • func NewService(c Config) *Service
  • func (s *Service) Addr() net.Addr
  • func (s *Service) BoundHTTPAddr() string
  • func (s *Service) Close() error
  • func (s *Service) Err() <-chan error
  • func (s *Service) Open() error
  • func (s *Service) Statistics(tags map[string]string) []models.Statistic
  • func (s *Service) WithLogger(log *zap.Logger)
• type Statistics
• type Store
• type Throttler
  • func NewThrottler(concurrentN, maxEnqueueN int) *Throttler
  • func (t *Throttler) Handler(h http.Handler) http.Handler

Constants

const (
	// DefaultBindAddress is the default address to bind to.
	DefaultBindAddress = ":8086"

	// DefaultRealm is the default realm sent back when issuing a basic auth challenge.
	DefaultRealm = "InfluxDB"

	// DefaultBindSocket is the default unix socket to bind to.
	DefaultBindSocket = "/var/run/influxdb.sock"

	// DefaultMaxBodySize is the default maximum size of a client request body, in bytes. Specify 0 for no limit.
	DefaultMaxBodySize = 25e6

	// DefaultEnqueuedWriteTimeout is the maximum time a write request can wait to be processed.
	DefaultEnqueuedWriteTimeout = 30 * time.Second
)

const (
	// DefaultChunkSize specifies the maximum number of points that will
	// be read before sending results back to the engine.
	//
	// This has no relation to the number of bytes that are returned.
	DefaultChunkSize = 10000

	DefaultDebugRequestsInterval = 10 * time.Second

	MaxDebugRequestsInterval = 6 * time.Hour
)

Functions

func LimitListener

func LimitListener(l net.Listener, n int) net.Listener

LimitListener returns a Listener that accepts at most n simultaneous connections from the provided Listener and will drop extra connections.

func WriteError

func WriteError(w ResponseWriter, err error) (int, error)

WriteError is a convenience function for writing an error response to the ResponseWriter.

Types

type AuthenticationMethod

type AuthenticationMethod int

AuthenticationMethod defines the type of authentication used.

const (
	// Authenticate using basic authentication.
	UserAuthentication AuthenticationMethod = iota

	// Authenticate with jwt.
	BearerAuthentication
)

Supported authentication methods.

type Config

type Config struct {
	Enabled                 bool          `toml:"enabled"`
	BindAddress             string        `toml:"bind-address"`
	AuthEnabled             bool          `toml:"auth-enabled"`
	LogEnabled              bool          `toml:"log-enabled"`
	SuppressWriteLog        bool          `toml:"suppress-write-log"`
	WriteTracing            bool          `toml:"write-tracing"`
	PprofEnabled            bool          `toml:"pprof-enabled"`
	DebugPprofEnabled       bool          `toml:"debug-pprof-enabled"`
	HTTPSEnabled            bool          `toml:"https-enabled"`
	HTTPSCertificate        string        `toml:"https-certificate"`
	HTTPSPrivateKey         string        `toml:"https-private-key"`
	MaxRowLimit             int           `toml:"max-row-limit"`
	MaxConnectionLimit      int           `toml:"max-connection-limit"`
	SharedSecret            string        `toml:"shared-secret"`
	Realm                   string        `toml:"realm"`
	UnixSocketEnabled       bool          `toml:"unix-socket-enabled"`
	UnixSocketGroup         *toml.Group   `toml:"unix-socket-group"`
	UnixSocketPermissions   toml.FileMode `toml:"unix-socket-permissions"`
	BindSocket              string        `toml:"bind-socket"`
	MaxBodySize             int           `toml:"max-body-size"`
	AccessLogPath           string        `toml:"access-log-path"`
	MaxConcurrentWriteLimit int           `toml:"max-concurrent-write-limit"`
	MaxEnqueuedWriteLimit   int           `toml:"max-enqueued-write-limit"`
	EnqueuedWriteTimeout    time.Duration `toml:"enqueued-write-timeout"`
	TLS                     *tls.Config   `toml:"-"`
}

Config represents a configuration for a HTTP service.

func NewConfig

func NewConfig() Config

NewConfig returns a new Config with default settings.

func (Config) Diagnostics

func (c Config) Diagnostics() (*diagnostics.Diagnostics, error)

Diagnostics returns a diagnostics representation of a subset of the Config.

type Handler

type Handler struct {
	Version   string
	BuildType string

	MetaClient interface {
		Database(name string) *meta.DatabaseInfo
		Databases() []meta.DatabaseInfo
		Authenticate(username, password string) (ui meta.User, err error)
		User(username string) (meta.User, error)
		AdminUserExists() bool
	}

	QueryAuthorizer interface {
		AuthorizeQuery(u meta.User, query *influxql.Query, database string) error
	}

	WriteAuthorizer interface {
		AuthorizeWrite(username, database string) error
	}

	QueryExecutor *query.Executor

	Monitor interface {
		Statistics(tags map[string]string) ([]*monitor.Statistic, error)
		Diagnostics() (map[string]*diagnostics.Diagnostics, error)
	}

	PointsWriter interface {
		WritePoints(database, retentionPolicy string, consistencyLevel models.ConsistencyLevel, user meta.User, points []models.Point) error
	}

	Store Store

	Config    *Config
	Logger    *zap.Logger
	CLFLogger *log.Logger
	// contains filtered or unexported fields
}

Handler represents an HTTP handler for the InfluxDB server.

func NewHandler

func NewHandler(c Config) *Handler

NewHandler returns a new instance of handler with routes.

func (*Handler) AddRoutes

func (h *Handler) AddRoutes(routes ...Route)

AddRoutes sets the provided routes on the handler.

func (*Handler) Close

func (h *Handler) Close()

func (*Handler) Open

func (h *Handler) Open()

func (*Handler) ServeHTTP

func (h *Handler) ServeHTTP(w http.ResponseWriter, r *http.Request)

ServeHTTP responds to HTTP request to the handler.

func (*Handler) Statistics

func (h *Handler) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

type RequestInfo

type RequestInfo struct {
	IPAddr   string
	Username string
}

func (*RequestInfo) String

func (r *RequestInfo) String() string

type RequestProfile

type RequestProfile struct {
	Requests map[RequestInfo]*RequestStats
	// contains filtered or unexported fields
}

func (*RequestProfile) AddQuery

func (p *RequestProfile) AddQuery(info RequestInfo)

func (*RequestProfile) AddWrite

func (p *RequestProfile) AddWrite(info RequestInfo)

func (*RequestProfile) Stop

func (p *RequestProfile) Stop()

Stop informs the RequestTracker to stop collecting statistics for this profile.

type RequestStats

type RequestStats struct {
	Writes  int64 `json:"writes"`
	Queries int64 `json:"queries"`
}

type RequestTracker

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

func NewRequestTracker

func NewRequestTracker() *RequestTracker

func (*RequestTracker) Add

func (rt *RequestTracker) Add(req *http.Request, user meta.User)

func (*RequestTracker) TrackRequests

func (rt *RequestTracker) TrackRequests() *RequestProfile

type Response

type Response struct {
	Results []*query.Result
	Err     error
}

Response represents a list of statement results.

func (*Response) Error

func (r *Response) Error() error

Error returns the first error from any statement. Returns nil if no errors occurred on any statements.

func (Response) MarshalJSON

func (r Response) MarshalJSON() ([]byte, error)

MarshalJSON encodes a Response struct into JSON.

func (*Response) UnmarshalJSON

func (r *Response) UnmarshalJSON(b []byte) error

UnmarshalJSON decodes the data into the Response struct.

type ResponseWriter

type ResponseWriter interface {
	// WriteResponse writes a response.
	WriteResponse(resp Response) (int, error)

	http.ResponseWriter
}

ResponseWriter is an interface for writing a response.

func NewResponseWriter

func NewResponseWriter(w http.ResponseWriter, r *http.Request) ResponseWriter

NewResponseWriter creates a new ResponseWriter based on the Accept header in the request that wraps the ResponseWriter.

type Route

type Route struct {
	Name           string
	Method         string
	Pattern        string
	Gzipped        bool
	LoggingEnabled bool
	HandlerFunc    interface{}
}

Route specifies how to handle a HTTP verb for a given endpoint.

type Service

type Service struct {
	Handler *Handler

	Logger *zap.Logger
	// contains filtered or unexported fields
}

Service manages the listener and handler for an HTTP endpoint.

func NewService

func NewService(c Config) *Service

NewService returns a new instance of Service.

func (*Service) Addr

func (s *Service) Addr() net.Addr

Addr returns the listener's address. Returns nil if listener is closed.

func (*Service) BoundHTTPAddr

func (s *Service) BoundHTTPAddr() string

BoundHTTPAddr returns the string version of the address that the HTTP server is listening on. This is useful if you start an ephemeral server in test with bind address localhost:0.

func (*Service) Close

func (s *Service) Close() error

Close closes the underlying listener.

func (*Service) Err

func (s *Service) Err() <-chan error

Err returns a channel for fatal errors that occur on the listener.

func (*Service) Open

func (s *Service) Open() error

Open starts the service.

func (*Service) Statistics

func (s *Service) Statistics(tags map[string]string) []models.Statistic

Statistics returns statistics for periodic monitoring.

func (*Service) WithLogger

func (s *Service) WithLogger(log *zap.Logger)

WithLogger sets the logger for the service.

type Statistics

type Statistics struct {
	Requests                     int64
	CQRequests                   int64
	QueryRequests                int64
	WriteRequests                int64
	PingRequests                 int64
	StatusRequests               int64
	WriteRequestBytesReceived    int64
	QueryRequestBytesTransmitted int64
	PointsWrittenOK              int64
	PointsWrittenDropped         int64
	PointsWrittenFail            int64
	AuthenticationFailures       int64
	RequestDuration              int64
	QueryRequestDuration         int64
	WriteRequestDuration         int64
	ActiveRequests               int64
	ActiveWriteRequests          int64
	ClientErrors                 int64
	ServerErrors                 int64
	RecoveredPanics              int64
	PromWriteRequests            int64
	PromReadRequests             int64
}

Statistics maintains statistics for the httpd service.

type Store

type Store interface {
	Read(ctx context.Context, req *storage.ReadRequest) (storage.ResultSet, error)
	WithLogger(log *zap.Logger)
}

Store describes the behaviour of the storage packages Store type.

type Throttler

type Throttler struct {

	// Maximum amount of time requests can wait in queue.
	// Must be set before adding middleware.
	EnqueueTimeout time.Duration

	Logger *zap.Logger
	// contains filtered or unexported fields
}

Throttler represents an HTTP throttler that limits the number of concurrent requests being processed as well as the number of enqueued requests.

func NewThrottler

func NewThrottler(concurrentN, maxEnqueueN int) *Throttler

NewThrottler returns a new instance of Throttler that limits to concurrentN. requests processed at a time and maxEnqueueN requests waiting to be processed.

func (*Throttler) Handler

func (t *Throttler) Handler(h http.Handler) http.Handler

Handler wraps h in a middleware handler that throttles requests.