telegraf/plugins/outputs/prometheus_client/README.md

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# Prometheus Client Service Output Plugin
This plugin starts a [Prometheus](https://prometheus.io/) Client, it exposes all metrics on `/metrics` (default) to be polled by a Prometheus server.
## Configuration
```
# Publish all metrics to /metrics for Prometheus to scrape
[[outputs.prometheus_client]]
# Address to listen on
listen = ":9273"
# Use TLS
tls_cert = "/etc/ssl/telegraf.crt"
tls_key = "/etc/ssl/telegraf.key"
# Use http basic authentication
basic_username = "Foo"
basic_password = "Bar"
# Path to publish the metrics on, defaults to /metrics
path = "/metrics"
# Expiration interval for each metric. 0 == no expiration
expiration_interval = "60s"
```