influxdb

README

InfluxDB

An Open-Source, Distributed, Time Series Database

InfluxDB v0.9.0 is now out. Going forward, the 0.9.x series of releases will not make breaking API changes or breaking changes to the underlying data storage. However, 0.9.0 clustering should be considered an alpha release.

InfluxDB is an open source distributed time series database with no external dependencies. It's useful for recording metrics, events, and performing analytics.

Features

• Built-in HTTP API so you don't have to write any server side code to get up and running.
• Data can be tagged, allowing very flexible querying.
• SQL-like query language.
• Clustering is supported out of the box, so that you can scale horizontally to handle your data.
• Simple to install and manage, and fast to get data in and out.
• It aims to answer queries in real-time. That means every data point is indexed as it comes in and is immediately available in queries that should return in < 100ms.

Getting Started

The following directions apply only to the 0.9.0 release or building from the source on master.

Building

You don't need to build the project to use it - you can use any of our pre-built packages to install InfluxDB. That's the recommended way to get it running. However, if you want to contribute to the core of InfluxDB, you'll need to build. For those adventurous enough, you can follow along on our docs.

Starting InfluxDB

• service influxdb start if you have installed InfluxDB using an official Debian or RPM package.
• $GOPATH/bin/influxd if you have built InfluxDB from source.

Creating your first database

curl -G 'http://localhost:8086/query' --data-urlencode "q=CREATE DATABASE mydb"

Insert some data

curl -XPOST 'http://localhost:8086/write?db=mydb' \
-d 'cpu,host=server01,region=uswest load=42 1434055562000000000'

curl -XPOST 'http://localhost:8086/write?db=mydb' \
-d 'cpu,host=server02,region=uswest load=78 1434055562000000000'

curl -XPOST 'http://localhost:8086/write?db=mydb' \
-d 'cpu,host=server03,region=useast load=15.4 1434055562000000000'

Query for the data

curl -G http://localhost:8086/query?pretty=true --data-urlencode "db=mydb" \
--data-urlencode "q=SELECT * FROM cpu WHERE host='server01' AND time < now - 1d"

Analyze the data

curl -G http://localhost:8086/query?pretty=true --data-urlencode "db=mydb" \
--data-urlencode "q=SELECT mean(load) FROM cpu WHERE region='uswest'"

Helpful Links

• Understand the design goals and motivations of the project.
• Follow the getting started guide to find out how to install InfluxDB, start writing more data, and issue more queries - in just a few minutes.
• See the HTTP API documentation to start writing a library for your favorite language.

Documentation

Index

• Variables
• func ErrDatabaseNotFound(name string) error
• func ErrMeasurementNotFound(name string) error
• func Errorf(format string, a ...interface{}) (err error)
• func IsClientError(err error) bool
• type Balancer
  • func NewNodeBalancer(nodes []meta.NodeInfo) Balancer
• type BuildDiagnostics
  • func (b *BuildDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row
• type GoDiagnostics
  • func NewGoDiagnostics() *GoDiagnostics
  • func (g *GoDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row
• type MemoryDiagnostics
  • func NewMemoryDiagnostics() *MemoryDiagnostics
  • func (m *MemoryDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row
• type SystemDiagnostics
  • func NewSystemDiagnostics() *SystemDiagnostics
  • func (s *SystemDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row

Variables

var (
	// ErrFieldsRequired is returned when a point does not any fields.
	ErrFieldsRequired = errors.New("fields required")

	// ErrFieldTypeConflict is returned when a new field already exists with a different type.
	ErrFieldTypeConflict = errors.New("field type conflict")
)

Functions

func ErrDatabaseNotFound

func ErrDatabaseNotFound(name string) error

func ErrMeasurementNotFound

func ErrMeasurementNotFound(name string) error

func Errorf

func Errorf(format string, a ...interface{}) (err error)

func IsClientError

func IsClientError(err error) bool

IsClientError indicates whether an error is a known client error.

Types

type Balancer

type Balancer interface {
	// Next returns the next Node according to the balancing method
	// or nil if there are no nodes available
	Next() *meta.NodeInfo
}

Balancer represents a load-balancing algorithm for a set of nodes

func NewNodeBalancer

func NewNodeBalancer(nodes []meta.NodeInfo) Balancer

NewNodeBalancer create a shuffled, round-robin balancer so that multiple instances will return nodes in randomized order and each each returned node will be repeated in a cycle

type BuildDiagnostics

type BuildDiagnostics struct {
	Version    string
	CommitHash string
}

BuildDiagnostics capture basic build version information.

func (*BuildDiagnostics) AsRow

func (b *BuildDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row

AsRow returns the BuildDiagnostics object as an InfluxQL row.

type GoDiagnostics

type GoDiagnostics struct {
	GoMaxProcs   int
	NumGoroutine int
	Version      string
}

GoDiagnostics captures basic information about the runtime.

func NewGoDiagnostics

func NewGoDiagnostics() *GoDiagnostics

NewGoDiagnostics returns a GoDiagnostics object.

func (*GoDiagnostics) AsRow

func (g *GoDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row

AsRow returns the GoDiagnostic object as an InfluxQL row.

type MemoryDiagnostics

type MemoryDiagnostics struct {
	Alloc        int64
	TotalAlloc   int64
	Sys          int64
	Lookups      int64
	Mallocs      int64
	Frees        int64
	HeapAlloc    int64
	HeapSys      int64
	HeapIdle     int64
	HeapInUse    int64
	HeapReleased int64
	HeapObjects  int64
	PauseTotalNs int64
	NumGC        int64
}

MemoryDiagnostics captures Go memory stats.

func NewMemoryDiagnostics

func NewMemoryDiagnostics() *MemoryDiagnostics

NewMemoryDiagnostics returns a MemoryDiagnostics object.

func (*MemoryDiagnostics) AsRow

func (m *MemoryDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row

AsRow returns the MemoryDiagnostics object as an InfluxQL row.

type SystemDiagnostics

type SystemDiagnostics struct {
	Hostname string
	PID      int
	OS       string
	Arch     string
	NumCPU   int
}

SystemDiagnostics captures basic machine data.

func NewSystemDiagnostics

func NewSystemDiagnostics() *SystemDiagnostics

NewSystemDiagnostics returns a SystemDiagnostics object.

func (*SystemDiagnostics) AsRow

func (s *SystemDiagnostics) AsRow(measurement string, tags map[string]string) *influxql.Row

AsRow returns the GoDiagnostic object as an InfluxQL row.