/
currentop_collector.go
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/
currentop_collector.go
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// mongodb_exporter
// Copyright (C) 2017 Percona LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package exporter
import (
"context"
"strconv"
"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/bson/primitive"
"go.mongodb.org/mongo-driver/mongo"
)
type currentopCollector struct {
ctx context.Context
base *baseCollector
compatibleMode bool
topologyInfo labelsGetter
}
var ErrInvalidOrMissingInprogEntry = errors.New("invalid or missing inprog entry in currentop results")
// newCurrentopCollector creates a collector for being processed queries.
func newCurrentopCollector(ctx context.Context, client *mongo.Client, logger *logrus.Logger,
compatible bool, topology labelsGetter,
) *currentopCollector {
return ¤topCollector{
ctx: ctx,
base: newBaseCollector(client, logger),
compatibleMode: compatible,
topologyInfo: topology,
}
}
func (d *currentopCollector) Describe(ch chan<- *prometheus.Desc) {
d.base.Describe(d.ctx, ch, d.collect)
}
func (d *currentopCollector) Collect(ch chan<- prometheus.Metric) {
d.base.Collect(ch)
}
func (d *currentopCollector) collect(ch chan<- prometheus.Metric) {
defer measureCollectTime(ch, "mongodb", "currentop")()
logger := d.base.logger
client := d.base.client
// Get all requests that are being processed except system requests (admin and local).
cmd := bson.D{
{Key: "currentOp", Value: true},
{Key: "active", Value: true},
{Key: "microsecs_running", Value: bson.D{
{Key: "$exists", Value: true},
}},
{Key: "op", Value: bson.D{{Key: "$ne", Value: ""}}},
{Key: "ns", Value: bson.D{
{Key: "$ne", Value: ""},
{Key: "$not", Value: bson.D{{Key: "$regex", Value: "^admin.*|^local.*"}}},
}},
}
res := client.Database("admin").RunCommand(d.ctx, cmd)
var r primitive.M
if err := res.Decode(&r); err != nil {
ch <- prometheus.NewInvalidMetric(prometheus.NewInvalidDesc(err), err)
return
}
logger.Debug("currentop response from MongoDB:")
debugResult(logger, r)
inprog, ok := r["inprog"].(primitive.A)
if !ok {
ch <- prometheus.NewInvalidMetric(prometheus.NewInvalidDesc(ErrInvalidOrMissingInprogEntry),
ErrInvalidOrMissingInprogEntry)
}
for _, bsonMap := range inprog {
bsonMapElement, ok := bsonMap.(primitive.M)
if !ok {
logger.Errorf("Invalid type primitive.M assertion for bsonMap: %T", bsonMapElement)
continue
}
opid, ok := bsonMapElement["opid"].(int32)
if !ok {
logger.Errorf("Invalid type int32 assertion for 'opid': %T", bsonMapElement)
continue
}
namespace, ok := bsonMapElement["ns"].(string)
if !ok {
logger.Errorf("Invalid type string assertion for 'ns': %T", bsonMapElement)
continue
}
db, collection := splitNamespace(namespace)
op, ok := bsonMapElement["op"].(string)
if !ok {
logger.Errorf("Invalid type string assertion for 'op': %T", bsonMapElement)
continue
}
desc, ok := bsonMapElement["desc"].(string)
if !ok {
logger.Errorf("Invalid type string assertion for 'desc': %T", bsonMapElement)
continue
}
microsecs_running, ok := bsonMapElement["microsecs_running"].(int64)
if !ok {
logger.Errorf("Invalid type int64 assertion for 'microsecs_running': %T", bsonMapElement)
continue
}
labels := d.topologyInfo.baseLabels()
labels["opid"] = strconv.Itoa(int(opid))
labels["op"] = op
labels["desc"] = desc
labels["database"] = db
labels["collection"] = collection
labels["ns"] = namespace
m := primitive.M{"uptime": microsecs_running}
for _, metric := range makeMetrics("currentop_query", m, labels, d.compatibleMode) {
ch <- metric
}
}
}