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h2o prometheus stats handler
$stats_to_prometheus = {
"uptime" => {
"type" => "counter",
"name" => "uptime_seconds_total"
},
"generation" => {
"type" => "gauge",
"name" => "generation"
},
"connections" => {
"type" => "gauge",
"name" => "connections"
},
"max-connections" => {
"type" => "gauge",
"name" => "connections_max"
},
"listeners" => {
"type" => "gauge",
"name" => "listeners"
},
"worker-threads" => {
"type" => "gauge",
"name" => "worker_threads"
},
"num-sessions" => {
"type" => "counter",
"name" => "num_sessions_total"
},
"status-errors.400" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "400"
}
},
"status-errors.403" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "403"
}
},
"status-errors.404" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "404"
}
},
"status-errors.405" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "405"
}
},
"status-errors.416" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "416"
}
},
"status-errors.417" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "417"
}
},
"status-errors.500" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "500"
}
},
"status-errors.502" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "502"
}
},
"status-errors.503" => {
"type" => "counter",
"name" => "http_error_total",
"labels" => {
"code" => "503"
}
},
"http2-errors.protocol" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "protocol"
}
},
"http2-errors.internal" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "internal"
}
},
"http2-errors.flow-control" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "flow_control"
}
},
"http2-errors.settings-timeout" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "settings_timeout"
}
},
"http2-errors.stream-closed" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "stream_closed"
}
},
"http2-errors.frame-size" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "frame_size"
}
},
"http2-errors.refused-stream" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "refused_stream"
}
},
"http2-errors.cancel" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "cancel"
}
},
"http2-errors.compression" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "compression"
}
},
"http2-errors.connect" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "connect"
}
},
"http2-errors.enhance-your-calm" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "enhance_your_calm"
}
},
"http2-errors.inadequate-security" => {
"type" => "counter",
"name" => "http2_errors_total",
"labels" => {
"error" => "inadequate_security"
}
},
"http2.read-closed" => {
"type" => "counter",
"name" => "http2_closed_connection_total",
"labels" => {
"reason" => "read_closed"
}
},
"http2.write-closed" => {
"type" => "counter",
"name" => "http2_closed_connection_total",
"labels" => {
"reason" => "write_closed"
}
},
"connect-time-0" => {
"type" => "summary",
"name" => "connect_time_ms",
"labels" => {
"quantile" => "0"
}
},
"connect-time-25" => {
"type" => "summary",
"name" => "connect_time_ms",
"labels" => {
"quantile" => "0.25"
}
},
"connect-time-50" => {
"type" => "summary",
"name" => "connect_time_ms",
"labels" => {
"quantile" => "0.50"
}
},
"connect-time-75" => {
"type" => "summary",
"name" => "connect_time_ms",
"labels" => {
"quantile" => "0.75"
}
},
"connect-time-99" => {
"type" => "summary",
"name" => "connect_time_ms",
"labels" => {
"quantile" => "0.99"
}
},
"header-time-0" => {
"type" => "summary",
"name" => "header_time_ms",
"labels" => {
"quantile" => "0"
}
},
"header-time-25" => {
"type" => "summary",
"name" => "header_time_ms",
"labels" => {
"quantile" => "0.25"
}
},
"header-time-50" => {
"type" => "summary",
"name" => "header_time_ms",
"labels" => {
"quantile" => "0.50"
}
},
"header-time-75" => {
"type" => "summary",
"name" => "header_time_ms",
"labels" => {
"quantile" => "0.75"
}
},
"header-time-99" => {
"type" => "summary",
"name" => "header_time_ms",
"labels" => {
"quantile" => "0.99"
}
},
"body-time-0" => {
"type" => "summary",
"name" => "body_time_ms",
"labels" => {
"quantile" => "0"
}
},
"body-time-25" => {
"type" => "summary",
"name" => "body_time_ms",
"labels" => {
"quantile" => "0.25"
}
},
"body-time-50" => {
"type" => "summary",
"name" => "body_time_ms",
"labels" => {
"quantile" => "0.50"
}
},
"body-time-75" => {
"type" => "summary",
"name" => "body_time_ms",
"labels" => {
"quantile" => "0.75"
}
},
"body-time-99" => {
"type" => "summary",
"name" => "body_time_ms",
"labels" => {
"quantile" => "0.99"
}
},
"request-total-time-0" => {
"type" => "summary",
"name" => "request_time_ms",
"labels" => {
"quantile" => "0"
}
},
"request-total-time-25" => {
"type" => "summary",
"name" => "request_time_ms",
"labels" => {
"quantile" => "0.25"
}
},
"request-total-time-50" => {
"type" => "summary",
"name" => "request_time_ms",
"labels" => {
"quantile" => "0.50"
}
},
"request-total-time-75" => {
"type" => "summary",
"name" => "request_time_ms",
"labels" => {
"quantile" => "0.75"
}
},
"request-total-time-99" => {
"type" => "summary",
"name" => "request_time_ms",
"labels" => {
"quantile" => "0.99"
}
},
"process-time-0" => {
"type" => "summary",
"name" => "process_time_bucket_ms",
"labels" => {
"quantile" => "0"
}
},
"process-time-25" => {
"type" => "summary",
"name" => "process_time_bucket_ms",
"labels" => {
"quantile" => "0.25"
}
},
"process-time-50" => {
"type" => "summary",
"name" => "process_time_bucket_ms",
"labels" => {
"quantile" => "0.50"
}
},
"process-time-75" => {
"type" => "summary",
"name" => "process_time_bucke_ms",
"labels" => {
"quantile" => "0.75"
}
},
"process-time-99" => {
"type" => "summary",
"name" => "process_time_bucket_ms",
"labels" => {
"quantile" => "0.99"
}
},
"response-time-0" => {
"type" => "summary",
"name" => "response_time_ms",
"labels" => {
"quantile" => "0"
}
},
"response-time-25" => {
"type" => "summary",
"name" => "response_time_ms",
"labels" => {
"quantile" => "0.25"
}
},
"response-time-50" => {
"type" => "summary",
"name" => "response_time_ms",
"labels" => {
"quantile" => "0.50"
}
},
"response-time-75" => {
"type" => "summary",
"name" => "response_time_ms",
"labels" => {
"quantile" => "0.75"
}
},
"response-time-99" => {
"type" => "summary",
"name" => "response_time_ms",
"labels" => {
"quantile" => "0.99"
}
},
"duration-0" => {
"type" => "summary",
"name" => "request_duration_ms",
"labels" => {
"quantile" => "0"
}
},
"duration-25" => {
"type" => "summary",
"name" => "request_duration_ms",
"labels" => {
"quantile" => "0.25"
}
},
"duration-50" => {
"type" => "summary",
"name" => "request_duration_ms",
"labels" => {
"quantile" => "0.50"
}
},
"duration-75" => {
"type" => "summary",
"name" => "request_duration_ms",
"labels" => {
"quantile" => "0.75"
}
},
"duration-99" => {
"type" => "summary",
"name" => "request_duration_ms",
"labels" => {
"quantile" => "0.99"
}
}
}
Proc.new do |env|
time_now = Time.now.to_i * 1000
req = http_request('http://localhost:9399/status/json?show=durations,events,main')
status, headers, body = req.join
jsn = JSON.parse(body.join)
res = []
metrics_sent = {}
$stats_to_prometheus.each do |k,v|
metric_name = v["name"]
labels = v["labels"]
if labels
labels_string = '{' + labels.map{|lk,lv| "#{lk}=\"#{lv}\""}.join(",") + '}'
else
labels_string = ""
end
val = jsn[k]
type = v["type"]
# help = v["help"] rescue nil
# help = "h2o status handler entry. see https://h2o.examp1e.net/configure/status_directives.html" unless help
# res << "#HELP #{metric_name} #{help}\n"
res << "#TYPE #{metric_name} #{type}\n" unless metrics_sent[metric_name]
metrics_sent[metric_name] = true
res << "#{metric_name}#{labels_string} #{val.to_f}\n\n"
end
[200, [], res]
end
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