294 lines
8.1 KiB
Markdown
294 lines
8.1 KiB
Markdown
# Telegraf - A native agent for InfluxDB [](https://circleci.com/gh/influxdb/telegraf)
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Telegraf is an agent written in Go for collecting metrics from the system it's
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running on, or from other services, and writing them into InfluxDB.
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Design goals are to have a minimal memory footprint with a plugin system so
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that developers in the community can easily add support for collecting metrics
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from well known services (like Hadoop, Postgres, or Redis) and third party
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APIs (like Mailchimp, AWS CloudWatch, or Google Analytics).
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We'll eagerly accept pull requests for new plugins and will manage the set of
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plugins that Telegraf supports. See the
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[contributing guide](CONTRIBUTING.md) for instructions on
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writing new plugins.
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## Installation:
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### Linux deb and rpm packages:
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Latest:
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* http://get.influxdb.org/telegraf/telegraf_0.2.4_amd64.deb
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* http://get.influxdb.org/telegraf/telegraf-0.2.4-1.x86_64.rpm
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##### Package instructions:
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* Telegraf binary is installed in `/opt/telegraf/telegraf`
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* Telegraf daemon configuration file is in `/etc/opt/telegraf/telegraf.conf`
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* On sysv systems, the telegraf daemon can be controlled via
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`service telegraf [action]`
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* On systemd systems (such as Ubuntu 15+), the telegraf daemon can be
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controlled via `systemctl [action] telegraf`
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### Linux binaries:
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Latest:
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* http://get.influxdb.org/telegraf/telegraf_linux_amd64_0.2.4.tar.gz
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* http://get.influxdb.org/telegraf/telegraf_linux_386_0.2.4.tar.gz
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* http://get.influxdb.org/telegraf/telegraf_linux_arm_0.2.4.tar.gz
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##### Binary instructions:
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These are standalone binaries that can be unpacked and executed on any linux
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system. They can be unpacked and renamed in a location such as
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`/usr/local/bin` for convenience. A config file will need to be generated,
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see "How to use it" below.
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### OSX via Homebrew:
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```
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brew update
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brew install telegraf
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```
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### From Source:
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Telegraf manages dependencies via [gdm](https://github.com/sparrc/gdm),
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which gets installed via the Makefile
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if you don't have it already. You also must build with golang version 1.4+.
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1. [Install Go](https://golang.org/doc/install)
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2. [Setup your GOPATH](https://golang.org/doc/code.html#GOPATH)
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3. Run `go get github.com/influxdb/telegraf`
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4. Run `cd $GOPATH/src/github.com/influxdb/telegraf`
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5. Run `make`
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### How to use it:
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* Run `telegraf -sample-config > telegraf.conf` to create an initial configuration.
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* Or run `telegraf -sample-config -filter cpu:mem -outputfilter influxdb > telegraf.conf`.
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to create a config file with only CPU and memory plugins defined, and InfluxDB
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output defined.
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* Edit the configuration to match your needs.
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* Run `telegraf -config telegraf.conf -test` to output one full measurement
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sample to STDOUT. NOTE: you may want to run as the telegraf user if you are using
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the linux packages `sudo -u telegraf telegraf -config telegraf.conf -test`
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* Run `telegraf -config telegraf.conf` to gather and send metrics to configured outputs.
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* Run `telegraf -config telegraf.conf -filter system:swap`.
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to run telegraf with only the system & swap plugins defined in the config.
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## Telegraf Options
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Telegraf has a few options you can configure under the `agent` section of the
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config.
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* **hostname**: The hostname is passed as a tag. By default this will be
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the value returned by `hostname` on the machine running Telegraf.
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You can override that value here.
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* **interval**: How often to gather metrics. Uses a simple number +
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unit parser, e.g. "10s" for 10 seconds or "5m" for 5 minutes.
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* **debug**: Set to true to gather and send metrics to STDOUT as well as
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InfluxDB.
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## Plugin Options
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There are 5 configuration options that are configurable per plugin:
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* **pass**: An array of strings that is used to filter metrics generated by the
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current plugin. Each string in the array is tested as a glob match against metric names
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and if it matches, the metric is emitted.
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* **drop**: The inverse of pass, if a metric name matches, it is not emitted.
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* **tagpass**: tag names and arrays of strings that are used to filter metrics by the current plugin. Each string in the array is tested as a glob match against
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the tag name, and if it matches the metric is emitted.
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* **tagdrop**: The inverse of tagpass. If a tag matches, the metric is not emitted.
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This is tested on metrics that have passed the tagpass test.
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* **interval**: How often to gather this metric. Normal plugins use a single
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global interval, but if one particular plugin should be run less or more often,
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you can configure that here.
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### Plugin Configuration Examples
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This is a full working config that will output CPU data to an InfluxDB instance
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at 192.168.59.103:8086, tagging measurements with dc="denver-1". It will output
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measurements at a 10s interval and will collect per-cpu data, dropping any
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measurements which begin with `cpu_time`.
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```toml
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[tags]
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dc = "denver-1"
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[agent]
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interval = "10s"
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# OUTPUTS
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[outputs]
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[[outputs.influxdb]]
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url = "http://192.168.59.103:8086" # required.
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database = "telegraf" # required.
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precision = "s"
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# PLUGINS
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[plugins]
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[[plugins.cpu]]
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percpu = true
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totalcpu = false
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drop = ["cpu_time*"]
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```
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Below is how to configure `tagpass` and `tagdrop` parameters
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```toml
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[plugins]
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[[plugins.cpu]]
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percpu = true
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totalcpu = false
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drop = ["cpu_time"]
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# Don't collect CPU data for cpu6 & cpu7
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[plugins.cpu.tagdrop]
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cpu = [ "cpu6", "cpu7" ]
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[[plugins.disk]]
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[plugins.disk.tagpass]
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# tagpass conditions are OR, not AND.
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# If the (filesystem is ext4 or xfs) OR (the path is /opt or /home)
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# then the metric passes
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fstype = [ "ext4", "xfs" ]
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# Globs can also be used on the tag values
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path = [ "/opt", "/home*" ]
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```
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Below is how to configure `pass` and `drop` parameters
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```toml
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# Drop all metrics for guest CPU usage
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[[plugins.cpu]]
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drop = [ "cpu_usage_guest" ]
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# Only store inode related metrics for disks
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[[plugins.disk]]
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pass = [ "disk_inodes*" ]
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```
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Additional plugins (or outputs) of the same type can be specified,
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just define more instances in the config file:
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```toml
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[[plugins.cpu]]
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percpu = false
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totalcpu = true
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[[plugins.cpu]]
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percpu = true
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totalcpu = false
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drop = ["cpu_time*"]
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```
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## Supported Plugins
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**You can view usage instructions for each plugin by running**
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`telegraf -usage <pluginname>`.
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Telegraf currently has support for collecting metrics from:
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* aerospike
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* apache
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* bcache
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* disque
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* elasticsearch
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* exec (generic JSON-emitting executable plugin)
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* haproxy
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* httpjson (generic JSON-emitting http service plugin)
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* jolokia (remote JMX with JSON over HTTP)
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* leofs
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* lustre2
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* mailchimp
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* memcached
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* mongodb
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* mysql
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* nginx
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* phpfpm
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* ping
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* postgresql
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* procstat
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* prometheus
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* puppetagent
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* rabbitmq
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* redis
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* rethinkdb
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* twemproxy
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* zfs
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* zookeeper
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* system
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* cpu
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* mem
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* io
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* net
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* netstat
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* disk
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* swap
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## Supported Service Plugins
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Telegraf can collect metrics via the following services:
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* statsd
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* kafka_consumer
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We'll be adding support for many more over the coming months. Read on if you
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want to add support for another service or third-party API.
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## Output options
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Telegraf also supports specifying multiple output sinks to send data to,
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configuring each output sink is different, but examples can be
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found by running `telegraf -sample-config`.
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Outputs also support the same configurable options as plugins
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(pass, drop, tagpass, tagdrop), added in 0.2.4
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```toml
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[[outputs.influxdb]]
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urls = [ "http://localhost:8086" ]
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database = "telegraf"
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precision = "s"
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# Drop all measurements that start with "aerospike"
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drop = ["aerospike*"]
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[[outputs.influxdb]]
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urls = [ "http://localhost:8086" ]
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database = "telegraf-aerospike-data"
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precision = "s"
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# Only accept aerospike data:
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pass = ["aerospike*"]
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[[outputs.influxdb]]
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urls = [ "http://localhost:8086" ]
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database = "telegraf-cpu0-data"
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precision = "s"
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# Only store measurements where the tag "cpu" matches the value "cpu0"
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[outputs.influxdb.tagpass]
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cpu = ["cpu0"]
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```
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## Supported Outputs
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* influxdb
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* nsq
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* kafka
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* datadog
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* opentsdb
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* amqp (rabbitmq)
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* mqtt
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* librato
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* prometheus
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* amon
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* riemann
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## Contributing
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Please see the
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[contributing guide](CONTRIBUTING.md)
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for details on contributing a plugin or output to Telegraf.
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