mirror of
https://gitlab.com/pulsechaincom/go-pulse.git
synced 2024-12-22 19:40:36 +00:00
53f3c2ae65
This chang creates a GaugeInfo metrics type for registering informational (textual) metrics, e.g. geth version number. It also improves the testing for backend-exporters, and uses a shared subpackage in 'internal' to provide sample datasets and ordered registry. Implements #21783 --------- Co-authored-by: Martin Holst Swende <martin@swende.se>
53 lines
1.7 KiB
Go
53 lines
1.7 KiB
Go
// Copyright 2019 The go-ethereum Authors
|
|
// This file is part of the go-ethereum library.
|
|
//
|
|
// The go-ethereum library is free software: you can redistribute it and/or modify
|
|
// it under the terms of the GNU Lesser General Public License as published by
|
|
// the Free Software Foundation, either version 3 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// The go-ethereum library is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU Lesser General Public License for more details.
|
|
//
|
|
// You should have received a copy of the GNU Lesser General Public License
|
|
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
// Package prometheus exposes go-metrics into a Prometheus format.
|
|
package prometheus
|
|
|
|
import (
|
|
"fmt"
|
|
"net/http"
|
|
"sort"
|
|
|
|
"github.com/ethereum/go-ethereum/log"
|
|
"github.com/ethereum/go-ethereum/metrics"
|
|
)
|
|
|
|
// Handler returns an HTTP handler which dump metrics in Prometheus format.
|
|
func Handler(reg metrics.Registry) http.Handler {
|
|
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
|
|
// Gather and pre-sort the metrics to avoid random listings
|
|
var names []string
|
|
reg.Each(func(name string, i interface{}) {
|
|
names = append(names, name)
|
|
})
|
|
sort.Strings(names)
|
|
|
|
// Aggregate all the metrics into a Prometheus collector
|
|
c := newCollector()
|
|
|
|
for _, name := range names {
|
|
i := reg.Get(name)
|
|
if err := c.Add(name, i); err != nil {
|
|
log.Warn("Unknown Prometheus metric type", "type", fmt.Sprintf("%T", i))
|
|
}
|
|
}
|
|
w.Header().Add("Content-Type", "text/plain")
|
|
w.Header().Add("Content-Length", fmt.Sprint(c.buff.Len()))
|
|
w.Write(c.buff.Bytes())
|
|
})
|
|
}
|