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Sensu InfluxDB Handler


The Sensu InfluxDB Handler is a Sensu Event Handler that sends metrics to
the time series database InfluxDB. Sensu can collect metrics using
check output metric extraction or the StatsD listener. Those collected metrics
pass through the event pipeline, allowing Sensu to deliver the metrics to the
configured metric event handlers. This InfluxDB handler will allow you to
store, instrument, and visualize the metric data from Sensu.

This handler also supports creating metrics out of check status results. This enables
operators to leverage InfluxDB as a long-term storage archive for Sensu check result
history. This feature will only work with the "-c" flag, and any check can add it as

Check out The Sensu Blog or Sensu Docs for a step by step guide!

Usage Examples

Help output

  sensu-influxdb-handler [flags]

  -a, --addr string            the address of the influxdb server, should be of the form 'http://host:port', defaults to 'http://localhost:8086' or value of INFLUXDB_ADDR env variable (default "http://localhost:8086")
  -c, --check-status-metric    if true, the check status result will be captured as a metric
  -d, --db-name string         the influxdb to send metrics to
  -h, --help                   help for sensu-influxdb-handler
  -i, --insecure-skip-verify   if true, the influx client skips https certificate verification
  -l, --legacy-format          if true, parse the metric w/ legacy format
  -p, --password string        the password for the given db, defaults to value of INFLUXDB_PASS env variable
      --precision string       the precision value of the metric (default "s")
      --strip-host             if true, we strip the host from the metric
  -u, --username string        the username for the given db, defaults to value of INFLUXDB_USER env variable

Environment variables

Argument Environment Variable
--username INFLUXDB_USER
--password INFLUXDB_PASS

Security Note: Care should be taken to not expose the password for this handler by specifying it
on the command line or by directly setting the environment variable in the handler definition. It is
suggested to make use of secrets management to surface it as an environment variable. The
handler definition above references it as a secret. Below is an example secrets definition that make
use of the built-in env secrets provider.


All of the above command line arguments can be overridden by check or entity annotations.
The annotation consists of the key formed by appending the "long" argument specification
to the string

For example, having the following in an agent.yml file will create an entity annotation
such that metrics generated by events on this entity will go to the server-metrics database instead
of the database defined in the handler.

namespace: "default"
  - linux
  - "ws://"
annotations: "server-metrics"

Formatting options

Default formatting: If the measurement is separated by . (period), takes the fist word as the measurement and subsequent word(s) as the field_set key. If there are no . then the measurement is taken as is and the field_set key is "value".

To change this default behavior there are 2 flags that can be used.

  • -l, --legacy-format Keeps all elements of the measurement with no splitting and the key will always be "value". Also replaces the default tag key "sensu_entity_name" with "host".
  • --strip-host Some metric checks put a hostname prefix to the measurement. This will strip it off for you without having to edit the check output. Used alone the default behavior will split the 2nd word element (if using . seperators) as the measurement.

These 2 flags can be used in concert, which would strip off the hostname but then keep the rest of the measurement as is.


Asset registration

Assets are the best way to make use of this handler. If you're not using an asset, please consider doing so! If you're using sensuctl 5.13 or later, you can use the following command to add the asset:

sensuctl asset add sensu/sensu-influxdb-handler

If you're using an earlier version of sensuctl, you can download the asset definition from this project's Bonsai Asset Index page.

Asset definition

type: Asset
api_version: core/v2
  name: sensu-influxdb-handler_linux_amd64
    io.sensu.bonsai.tier: Supported
    io.sensu.bonsai.version: 3.1.2
    io.sensu.bonsai.namespace: sensu sensu-influxdb-handler
    io.sensu.bonsai.tags: ''
  sha512: 612c6ff9928841090c4d23bf20aaf7558e4eed8977a848cf9e2899bb13a13e7540bac2b63e324f39d9b1257bb479676bc155b24e21bf93c722b812b0f15cb3bd
  - entity.system.os == 'linux'
  - entity.system.arch == 'amd64'

Handler definition

api_version: core/v2
type: Handler
  namespace: default
  name: influxdb
  type: pipe
  command: sensu-influxdb-handler -d sensu
  timeout: 10
  - INFLUXDB_ADDR=http://influxdb.default.svc.cluster.local:8086
  - INFLUXDB_PASS=password
  - has_metrics
  - sensu/sensu-influxdb-handler

Check definition

api_version: core/v2
type: CheckConfig
  namespace: default
  name: dummy-app-prometheus
  command: sensu-prometheus-collector -exporter-url http://localhost:8080/metrics
  - dummy
  publish: true
  interval: 10
  output_metric_format: influxdb_line
  - influxdb

That's right, you can collect different types of metrics (ex. Influx,
Graphite, OpenTSDB, Nagios, etc.), Sensu will extract and transform
them, and this handler will populate them into your InfluxDB.

Security Note: The InfluxDB addr, username and password are treated as a security sensitive configuration options in this example and are loaded into the handler config as env_vars instead of as a command arguments. Command arguments are commonly readable from the process table by other unprivileged users on a system (ex: ps and top commands), so it's a better practice to read in sensitive information via environment variables or configuration files as part of command execution. The command flags for these configuration options are provided as an override for testing purposes.

Installing from source and contributing

Download the latest version of the sensu-influxdb-handler from releases,
or create an executable from this source.


From the local path of the sensu-influxdb-handler repository:

go build -o /usr/local/bin/sensu-influxdb-handler main.go

To contribute to this plugin, see CONTRIBUTING

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