68 lines
2.4 KiB
Markdown
68 lines
2.4 KiB
Markdown
# InfluxDB Listener Input Plugin
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InfluxDB Listener is a service input plugin that listens for requests sent
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according to the [InfluxDB HTTP API][influxdb_http_api]. The intent of the
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plugin is to allow Telegraf to serve as a proxy/router for the `/write`
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endpoint of the InfluxDB HTTP API.
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**Note:** This plugin was previously known as `http_listener`. If you wish to
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send general metrics via HTTP it is recommended to use the
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[`http_listener_v2`][http_listener_v2] instead.
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The `/write` endpoint supports the `precision` query parameter and can be set
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to one of `ns`, `u`, `ms`, `s`, `m`, `h`. All other parameters are ignored and
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defer to the output plugins configuration.
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When chaining Telegraf instances using this plugin, CREATE DATABASE requests
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receive a 200 OK response with message body `{"results":[]}` but they are not
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relayed. The output configuration of the Telegraf instance which ultimately
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submits data to InfluxDB determines the destination database.
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### Configuration:
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```toml
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[[inputs.influxdb_listener]]
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## Address and port to host HTTP listener on
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service_address = ":8186"
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## maximum duration before timing out read of the request
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read_timeout = "10s"
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## maximum duration before timing out write of the response
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write_timeout = "10s"
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## Maximum allowed http request body size in bytes.
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## 0 means to use the default of 536,870,912 bytes (500 mebibytes)
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max_body_size = 0
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## Maximum line size allowed to be sent in bytes.
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## 0 means to use the default of 65536 bytes (64 kibibytes)
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max_line_size = 0
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## Set one or more allowed client CA certificate file names to
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## enable mutually authenticated TLS connections
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tls_allowed_cacerts = ["/etc/telegraf/clientca.pem"]
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## Add service certificate and key
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tls_cert = "/etc/telegraf/cert.pem"
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tls_key = "/etc/telegraf/key.pem"
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## Optional username and password to accept for HTTP basic authentication.
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## You probably want to make sure you have TLS configured above for this.
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# basic_username = "foobar"
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# basic_password = "barfoo"
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```
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### Metrics:
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Metrics are created from InfluxDB Line Protocol in the request body.
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### Troubleshooting:
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**Example Query:**
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```
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curl -i -XPOST 'http://localhost:8186/write' --data-binary 'cpu_load_short,host=server01,region=us-west value=0.64 1434055562000000000'
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```
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[influxdb_http_api]: https://docs.influxdata.com/influxdb/latest/guides/writing_data/
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[http_listener_v2]: /plugins/inputs/influxdb_listener_v2/README.md
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