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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package runner
import (
"bufio"
"fmt"
"net/http"
"strings"
"time"
)
// Prometheus metrics collected in Conduit.
const (
BlockImportTimeName = "import_time_sec"
ImportedTxnsPerBlockName = "imported_tx_per_block"
ImportedRoundGaugeName = "imported_round"
GetAlgodRawBlockTimeName = "get_algod_raw_block_time_sec"
ImportedTxnsName = "imported_txns"
ImporterTimeName = "importer_time_sec"
ProcessorTimeName = "processor_time_sec"
ExporterTimeName = "exporter_time_sec"
PipelineRetryCountName = "pipeline_retry_count"
)
// AllMetricNames is a reference for all the custom metric names.
var AllMetricNames = []string{
BlockImportTimeName,
ImportedTxnsPerBlockName,
ImportedRoundGaugeName,
GetAlgodRawBlockTimeName,
ImporterTimeName,
ProcessorTimeName,
ExporterTimeName,
PipelineRetryCountName,
}
// MetricsCollector queries a /metrics endpoint for prometheus style metrics and saves metrics matching a pattern.
type MetricsCollector struct {
// MetricsURL where metrics can be queried.
MetricsURL string
// Data is all of the results.
Data []Entry
}
// Entry is the raw data pulled from the endpoint along with a timestamp.
type Entry struct {
Timestamp time.Time
Data []string
}
// Collect fetches the metrics.
func (r *MetricsCollector) Collect(substrings ...string) error {
metrics, err := r.getMetrics(substrings...)
if err != nil {
return err
}
if len(metrics) > 0 {
entry := Entry{
Timestamp: time.Now(),
Data: metrics,
}
r.Data = append(r.Data, entry)
}
return nil
}
func (r MetricsCollector) getMetrics(substrings ...string) (result []string, err error) {
resp, err := http.Get(r.MetricsURL)
if err != nil {
err = fmt.Errorf("unable to read metrics url '%s'", r.MetricsURL)
return
}
defer resp.Body.Close()
scanner := bufio.NewScanner(resp.Body)
for scanner.Scan() {
str := scanner.Text()
if strings.HasPrefix(str, "#") {
continue
}
for _, substring := range substrings {
if strings.Contains(str, substring) {
result = append(result, str)
break
}
}
}
if scanner.Err() != nil {
err = fmt.Errorf("problem reading metrics response: %w", scanner.Err())
}
return
}
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