statsd

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 Go to latest Published: Oct 28, 2020 License: MIT Imports: 17 Imported by: 189

README

StatsD Input Plugin

Configuration
# Statsd Server
[[inputs.statsd]]
  ## Protocol, must be "tcp", "udp4", "udp6" or "udp" (default=udp)
  protocol = "udp"

  ## MaxTCPConnection - applicable when protocol is set to tcp (default=250)
  max_tcp_connections = 250

  ## Enable TCP keep alive probes (default=false)
  tcp_keep_alive = false

  ## Specifies the keep-alive period for an active network connection.
  ## Only applies to TCP sockets and will be ignored if tcp_keep_alive is false.
  ## Defaults to the OS configuration.
  # tcp_keep_alive_period = "2h"

  ## Address and port to host UDP listener on
  service_address = ":8125"

  ## The following configuration options control when telegraf clears it's cache
  ## of previous values. If set to false, then telegraf will only clear it's
  ## cache when the daemon is restarted.
  ## Reset gauges every interval (default=true)
  delete_gauges = true
  ## Reset counters every interval (default=true)
  delete_counters = true
  ## Reset sets every interval (default=true)
  delete_sets = true
  ## Reset timings & histograms every interval (default=true)
  delete_timings = true

  ## Percentiles to calculate for timing & histogram stats.
  percentiles = [50.0, 90.0, 99.0, 99.9, 99.95, 100.0]

  ## separator to use between elements of a statsd metric
  metric_separator = "_"

  ## Parses tags in the datadog statsd format
  ## http://docs.datadoghq.com/guides/dogstatsd/
  ## deprecated in 1.10; use datadog_extensions option instead
  parse_data_dog_tags = false

  ## Parses extensions to statsd in the datadog statsd format
  ## currently supports metrics and datadog tags.
  ## http://docs.datadoghq.com/guides/dogstatsd/
  datadog_extensions = false

  ## Statsd data translation templates, more info can be read here:
  ## https://github.com/influxdata/telegraf/blob/master/docs/TEMPLATE_PATTERN.md
  # templates = [
  #     "cpu.* measurement*"
  # ]

  ## Number of UDP messages allowed to queue up, once filled,
  ## the statsd server will start dropping packets
  allowed_pending_messages = 10000

  ## Number of timing/histogram values to track per-measurement in the
  ## calculation of percentiles. Raising this limit increases the accuracy
  ## of percentiles but also increases the memory usage and cpu time.
  percentile_limit = 1000

  ## Maximum socket buffer size in bytes, once the buffer fills up, metrics
  ## will start dropping.  Defaults to the OS default.
  # read_buffer_size = 65535
Description

The statsd plugin is a special type of plugin which runs a backgrounded statsd listener service while telegraf is running.

The format of the statsd messages was based on the format described in the original etsy statsd implementation. In short, the telegraf statsd listener will accept:

  • Gauges
    • users.current.den001.myapp:32|g <- standard
    • users.current.den001.myapp:+10|g <- additive
    • users.current.den001.myapp:-10|g
  • Counters
    • deploys.test.myservice:1|c <- increments by 1
    • deploys.test.myservice:101|c <- increments by 101
    • deploys.test.myservice:1|c|@0.1 <- with sample rate, increments by 10
  • Sets
    • users.unique:101|s
    • users.unique:101|s
    • users.unique:102|s <- would result in a count of 2 for users.unique
  • Timings & Histograms
    • load.time:320|ms
    • load.time.nanoseconds:1|h
    • load.time:200|ms|@0.1 <- sampled 1/10 of the time

It is possible to omit repetitive names and merge individual stats into a single line by separating them with additional colons:

  • users.current.den001.myapp:32|g:+10|g:-10|g
  • deploys.test.myservice:1|c:101|c:1|c|@0.1
  • users.unique:101|s:101|s:102|s
  • load.time:320|ms:200|ms|@0.1

This also allows for mixed types in a single line:

  • foo:1|c:200|ms

The string foo:1|c:200|ms is internally split into two individual metrics foo:1|c and foo:200|ms which are added to the aggregator separately.

Influx Statsd

In order to take advantage of InfluxDB's tagging system, we have made a couple additions to the standard statsd protocol. First, you can specify tags in a manner similar to the line-protocol, like this:

users.current,service=payroll,region=us-west:32|g
Measurements:

Meta:

  • tags: metric_type=<gauge|set|counter|timing|histogram>

Outputted measurements will depend entirely on the measurements that the user sends, but here is a brief rundown of what you can expect to find from each metric type:

  • Gauges
    • Gauges are a constant data type. They are not subject to averaging, and they don’t change unless you change them. That is, once you set a gauge value, it will be a flat line on the graph until you change it again.
  • Counters
    • Counters are the most basic type. They are treated as a count of a type of event. They will continually increase unless you set delete_counters=true.
  • Sets
    • Sets count the number of unique values passed to a key. For example, you could count the number of users accessing your system using users:<user_id>|s. No matter how many times the same user_id is sent, the count will only increase by 1.
  • Timings & Histograms
    • Timers are meant to track how long something took. They are an invaluable tool for tracking application performance.
    • The following aggregate measurements are made for timers:
      • statsd_<name>_lower: The lower bound is the lowest value statsd saw for that stat during that interval.
      • statsd_<name>_upper: The upper bound is the highest value statsd saw for that stat during that interval.
      • statsd_<name>_mean: The mean is the average of all values statsd saw for that stat during that interval.
      • statsd_<name>_stddev: The stddev is the sample standard deviation of all values statsd saw for that stat during that interval.
      • statsd_<name>_sum: The sum is the sample sum of all values statsd saw for that stat during that interval.
      • statsd_<name>_count: The count is the number of timings statsd saw for that stat during that interval. It is not averaged.
      • statsd_<name>_percentile_<P> The Pth percentile is a value x such that P% of all the values statsd saw for that stat during that time period are below x. The most common value that people use for P is the 90, this is a great number to try to optimize.
Plugin arguments
  • protocol string: Protocol used in listener - tcp or udp options
  • max_tcp_connections []int: Maximum number of concurrent TCP connections to allow. Used when protocol is set to tcp.
  • tcp_keep_alive boolean: Enable TCP keep alive probes
  • tcp_keep_alive_period internal.Duration: Specifies the keep-alive period for an active network connection
  • service_address string: Address to listen for statsd UDP packets on
  • delete_gauges boolean: Delete gauges on every collection interval
  • delete_counters boolean: Delete counters on every collection interval
  • delete_sets boolean: Delete set counters on every collection interval
  • delete_timings boolean: Delete timings on every collection interval
  • percentiles []int: Percentiles to calculate for timing & histogram stats
  • allowed_pending_messages integer: Number of messages allowed to queue up waiting to be processed. When this fills, messages will be dropped and logged.
  • percentile_limit integer: Number of timing/histogram values to track per-measurement in the calculation of percentiles. Raising this limit increases the accuracy of percentiles but also increases the memory usage and cpu time.
  • templates []string: Templates for transforming statsd buckets into influx measurements and tags.
  • parse_data_dog_tags boolean: Enable parsing of tags in DataDog's dogstatsd format (http://docs.datadoghq.com/guides/dogstatsd/)
  • datadog_extensions boolean: Enable parsing of DataDog's extensions to dogstatsd format (http://docs.datadoghq.com/guides/dogstatsd/)
Statsd bucket -> InfluxDB line-protocol Templates

The plugin supports specifying templates for transforming statsd buckets into InfluxDB measurement names and tags. The templates have a measurement keyword, which can be used to specify parts of the bucket that are to be used in the measurement name. Other words in the template are used as tag names. For example, the following template:

templates = [
    "measurement.measurement.region"
]

would result in the following transformation:

cpu.load.us-west:100|g
=> cpu_load,region=us-west 100

Users can also filter the template to use based on the name of the bucket, using glob matching, like so:

templates = [
    "cpu.* measurement.measurement.region",
    "mem.* measurement.measurement.host"
]

which would result in the following transformation:

cpu.load.us-west:100|g
=> cpu_load,region=us-west 100

mem.cached.localhost:256|g
=> mem_cached,host=localhost 256

Consult the Template Patterns documentation for additional details.

Documentation

Index

Constants

View Source 
const (
	// UDP_MAX_PACKET_SIZE is the UDP packet limit, see
	// https://en.wikipedia.org/wiki/User_Datagram_Protocol#Packet_structure
	UDP_MAX_PACKET_SIZE int = 64 * 1024

	MaxTCPConnections = 250
)

Variables

This section is empty.

Functions

This section is empty.

Types

type RunningStats 

type RunningStats struct {
	PercLimit int
	// contains filtered or unexported fields
}

RunningStats calculates a running mean, variance, standard deviation, lower bound, upper bound, count, and can calculate estimated percentiles. It is based on the incremental algorithm described here: 

https://en.wikipedia.org/wiki/Algorithms_for_calculating_variance

func (*RunningStats) AddValue 

func (rs *RunningStats) AddValue(v float64)

func (*RunningStats) Count 

func (rs *RunningStats) Count() int64

func (*RunningStats) Lower 

func (rs *RunningStats) Lower() float64

func (*RunningStats) Mean 

func (rs *RunningStats) Mean() float64

func (*RunningStats) Percentile 

func (rs *RunningStats) Percentile(n float64) float64

func (*RunningStats) Stddev 

func (rs *RunningStats) Stddev() float64

func (*RunningStats) Sum added in v1.14.0 

func (rs *RunningStats) Sum() float64

func (*RunningStats) Upper 

func (rs *RunningStats) Upper() float64

func (*RunningStats) Variance 

func (rs *RunningStats) Variance() float64

type Statsd 

type Statsd struct {
	// Protocol used on listener - udp or tcp
	Protocol string `toml:"protocol"`

	// Address & Port to serve from
	ServiceAddress string

	// Number of messages allowed to queue up in between calls to Gather. If this
	// fills up, packets will get dropped until the next Gather interval is ran.
	AllowedPendingMessages int

	// Percentiles specifies the percentiles that will be calculated for timing
	// and histogram stats.
	Percentiles     []internal.Number
	PercentileLimit int

	DeleteGauges   bool
	DeleteCounters bool
	DeleteSets     bool
	DeleteTimings  bool
	ConvertNames   bool

	// MetricSeparator is the separator between parts of the metric name.
	MetricSeparator string
	// This flag enables parsing of tags in the dogstatsd extension to the
	// statsd protocol (http://docs.datadoghq.com/guides/dogstatsd/)
	ParseDataDogTags bool // depreciated in 1.10; use datadog_extensions

	// Parses extensions to statsd in the datadog statsd format
	// currently supports metrics and datadog tags.
	// http://docs.datadoghq.com/guides/dogstatsd/
	DataDogExtensions bool `toml:"datadog_extensions"`

	// UDPPacketSize is deprecated, it's only here for legacy support
	// we now always create 1 max size buffer and then copy only what we need
	// into the in channel
	// see https://github.com/influxdata/telegraf/pull/992
	UDPPacketSize int `toml:"udp_packet_size"`

	ReadBufferSize int `toml:"read_buffer_size"`

	sync.Mutex

	// bucket -> influx templates
	Templates []string

	// Protocol listeners
	UDPlistener *net.UDPConn
	TCPlistener *net.TCPListener

	MaxTCPConnections int `toml:"max_tcp_connections"`

	TCPKeepAlive       bool               `toml:"tcp_keep_alive"`
	TCPKeepAlivePeriod *internal.Duration `toml:"tcp_keep_alive_period"`

	MaxConnections     selfstat.Stat
	CurrentConnections selfstat.Stat
	TotalConnections   selfstat.Stat
	TCPPacketsRecv     selfstat.Stat
	TCPBytesRecv       selfstat.Stat
	UDPPacketsRecv     selfstat.Stat
	UDPPacketsDrop     selfstat.Stat
	UDPBytesRecv       selfstat.Stat
	ParseTimeNS        selfstat.Stat

	Log telegraf.Logger
	// contains filtered or unexported fields
}

Statsd allows the importing of statsd and dogstatsd data.

func (*Statsd) Description 

func (_ *Statsd) Description() string

func (*Statsd) Gather 

func (s *Statsd) Gather(acc telegraf.Accumulator) error

func (*Statsd) SampleConfig 

func (_ *Statsd) SampleConfig() string

func (*Statsd) Start 

func (s *Statsd) Start(ac telegraf.Accumulator) error

func (*Statsd) Stop 

func (s *Statsd) Stop()

Source Files

View all Source files

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