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fluent / fluent-plugin-prometheus

A fluent plugin that collects metrics and exposes for Prometheus.
Apache License 2.0
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Metrics endpoint limited to 5 incoming connections. #156

Closed AlexHockey closed 3 years ago

AlexHockey commented 4 years ago

It appears that the fluentd only allows 5 concurrent connections to the metrics endpoint. Prometheus uses persistent connections, so this means that a single fluentd instance can only be monitored by 5 Prometheus instances.

This is unlikely to be an issue in production, but I just ran into it on a test system and it caught me by surprise. Is it worth documenting this somewhere, or producing a log when this happens?

repeatedly commented 4 years ago

We forgot to release v1.8.0 to avoid this webrick issue.

https://github.com/fluent/fluent-plugin-prometheus#requirements

v1.8.0 and async-http gem combo fixes this problem.

AlexHockey commented 4 years ago

Thanks very much, I'll give that a go.