/
diagnostic_data_collector.go
88 lines (70 loc) · 2.49 KB
/
diagnostic_data_collector.go
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// mongodb_exporter
// Copyright (C) 2017 Percona LLC
//
// This program 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.
//
// This program 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 this program. If not, see <https://www.gnu.org/licenses/>.
package exporter
import (
"context"
"github.com/pkg/errors"
"github.com/prometheus/client_golang/prometheus"
"github.com/sirupsen/logrus"
"go.mongodb.org/mongo-driver/bson"
"go.mongodb.org/mongo-driver/mongo"
)
type diagnosticDataCollector struct {
ctx context.Context
client *mongo.Client
compatibleMode bool
logger *logrus.Logger
topologyInfo labelsGetter
}
func (d *diagnosticDataCollector) Describe(ch chan<- *prometheus.Desc) {
prometheus.DescribeByCollect(d, ch)
}
func (d *diagnosticDataCollector) Collect(ch chan<- prometheus.Metric) {
var m bson.M
cmd := bson.D{{Key: "getDiagnosticData", Value: "1"}}
res := d.client.Database("admin").RunCommand(d.ctx, cmd)
if err := res.Decode(&m); err != nil {
d.logger.Errorf("cannot run getDiagnosticData: %s", err)
return
}
m, ok := m["data"].(bson.M)
if !ok {
err := errors.Wrapf(errUnexpectedDataType, "%T for data field", m["data"])
d.logger.Errorf("cannot decode getDiagnosticData: %s", err)
return
}
d.logger.Debug("getDiagnosticData result")
debugResult(d.logger, m)
metrics := makeMetrics("", m, d.topologyInfo.baseLabels(), d.compatibleMode)
metrics = append(metrics, locksMetrics(m)...)
if d.compatibleMode {
metrics = append(metrics, specialMetrics(d.ctx, d.client, m, d.logger)...)
if cem, err := cacheEvictedTotalMetric(m); err == nil {
metrics = append(metrics, cem)
}
nodeType, err := getNodeType(d.ctx, d.client)
if err != nil {
d.logger.Errorf("Cannot get node type to check if this is a mongos: %s", err)
} else if nodeType == typeMongos {
metrics = append(metrics, mongosMetrics(d.ctx, d.client, d.logger)...)
}
}
for _, metric := range metrics {
ch <- metric
}
}
// check interface.
var _ prometheus.Collector = (*diagnosticDataCollector)(nil)