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Merge pull request #744 from kongfei605/mongo_back
mongodb back
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,83 @@ | ||
| // mongodb_exporter | ||
| // Copyright (C) 2022 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" | ||
| "sync" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/sirupsen/logrus" | ||
| "go.mongodb.org/mongo-driver/mongo" | ||
| ) | ||
|
|
||
| type baseCollector struct { | ||
| client *mongo.Client | ||
| logger *logrus.Logger | ||
|
|
||
| lock sync.Mutex | ||
| metricsCache []prometheus.Metric | ||
| } | ||
|
|
||
| // newBaseCollector creates a skeletal collector, which is used to create other collectors. | ||
| func newBaseCollector(client *mongo.Client, logger *logrus.Logger) *baseCollector { | ||
| return &baseCollector{ | ||
| client: client, | ||
| logger: logger, | ||
| } | ||
| } | ||
|
|
||
| func (d *baseCollector) Describe(ctx context.Context, ch chan<- *prometheus.Desc, collect func(mCh chan<- prometheus.Metric)) { | ||
| select { | ||
| case <-ctx.Done(): | ||
| return | ||
| default: | ||
| } | ||
|
|
||
| d.lock.Lock() | ||
| defer d.lock.Unlock() | ||
|
|
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| d.metricsCache = make([]prometheus.Metric, 0, defaultCacheSize) | ||
|
|
||
| // This is a copy/paste of prometheus.DescribeByCollect(d, ch) with the aggreated functionality | ||
| // to populate the metrics cache. Since on each scrape Prometheus will call Describe and inmediatelly | ||
| // after it will call Collect, it is safe to populate the cache here. | ||
| metrics := make(chan prometheus.Metric) | ||
| go func() { | ||
| collect(metrics) | ||
| close(metrics) | ||
| }() | ||
|
|
||
| for m := range metrics { | ||
| d.metricsCache = append(d.metricsCache, m) // populate the cache | ||
| ch <- m.Desc() | ||
| } | ||
| } | ||
|
|
||
| func (d *baseCollector) Collect(ch chan<- prometheus.Metric, collect func(mCh chan<- prometheus.Metric)) { | ||
| d.lock.Lock() | ||
| defer d.lock.Unlock() | ||
|
|
||
| if len(d.metricsCache) > 0 { | ||
| for _, metric := range d.metricsCache { | ||
| ch <- metric | ||
| } | ||
|
|
||
| return | ||
| } | ||
|
|
||
| collect(ch) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,147 @@ | ||
| // 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" | ||
| "strings" | ||
|
|
||
| "github.com/prometheus/client_golang/prometheus" | ||
| "github.com/sirupsen/logrus" | ||
| "go.mongodb.org/mongo-driver/bson" | ||
| "go.mongodb.org/mongo-driver/mongo" | ||
| ) | ||
|
|
||
| type collstatsCollector struct { | ||
| ctx context.Context | ||
| base *baseCollector | ||
|
|
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| compatibleMode bool | ||
| discoveringMode bool | ||
| topologyInfo labelsGetter | ||
|
|
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| collections []string | ||
| } | ||
|
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| // newCollectionStatsCollector creates a collector for statistics about collections. | ||
| func newCollectionStatsCollector(ctx context.Context, client *mongo.Client, logger *logrus.Logger, compatible, discovery bool, topology labelsGetter, collections []string) *collstatsCollector { | ||
| return &collstatsCollector{ | ||
| ctx: ctx, | ||
| base: newBaseCollector(client, logger), | ||
|
|
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| compatibleMode: compatible, | ||
| discoveringMode: discovery, | ||
| topologyInfo: topology, | ||
|
|
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| collections: collections, | ||
| } | ||
| } | ||
|
|
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| func (d *collstatsCollector) Describe(ch chan<- *prometheus.Desc) { | ||
| d.base.Describe(d.ctx, ch, d.collect) | ||
| } | ||
|
|
||
| func (d *collstatsCollector) Collect(ch chan<- prometheus.Metric) { | ||
| d.base.Collect(ch, d.collect) | ||
| } | ||
|
|
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| func (d *collstatsCollector) collect(ch chan<- prometheus.Metric) { | ||
|
|
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| collections := d.collections | ||
|
|
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| client := d.base.client | ||
| logger := d.base.logger | ||
|
|
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| if d.discoveringMode { | ||
| namespaces, err := listAllCollections(d.ctx, client, d.collections, systemDBs) | ||
| if err != nil { | ||
| logger.Errorf("cannot auto discover databases and collections: %s", err.Error()) | ||
|
|
||
| return | ||
| } | ||
|
|
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| collections = fromMapToSlice(namespaces) | ||
| } | ||
|
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| for _, dbCollection := range collections { | ||
| parts := strings.Split(dbCollection, ".") | ||
| if len(parts) < 2 { //nolint:gomnd | ||
| continue | ||
| } | ||
|
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| database := parts[0] | ||
| collection := strings.Join(parts[1:], ".") // support collections having a . | ||
|
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| aggregation := bson.D{ | ||
| { | ||
| Key: "$collStats", Value: bson.M{ | ||
| // TODO: PMM-9568 : Add support to handle histogram metrics | ||
| "latencyStats": bson.M{"histograms": false}, | ||
| "storageStats": bson.M{"scale": 1}, | ||
| }, | ||
| }, | ||
| } | ||
| project := bson.D{ | ||
| { | ||
| Key: "$project", Value: bson.M{ | ||
| "storageStats.wiredTiger": 0, | ||
| "storageStats.indexDetails": 0, | ||
| }, | ||
| }, | ||
| } | ||
|
|
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| cursor, err := client.Database(database).Collection(collection).Aggregate(d.ctx, mongo.Pipeline{aggregation, project}) | ||
| if err != nil { | ||
| logger.Errorf("cannot get $collstats cursor for collection %s.%s: %s", database, collection, err) | ||
|
|
||
| continue | ||
| } | ||
|
|
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| var stats []bson.M | ||
| if err = cursor.All(d.ctx, &stats); err != nil { | ||
| logger.Errorf("cannot get $collstats for collection %s.%s: %s", database, collection, err) | ||
|
|
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| continue | ||
| } | ||
|
|
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| logger.Debugf("$collStats metrics for %s.%s", database, collection) | ||
| debugResult(logger, stats) | ||
|
|
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| prefix := "collstats" | ||
| labels := d.topologyInfo.baseLabels() | ||
| labels["database"] = database | ||
| labels["collection"] = collection | ||
|
|
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| for _, metrics := range stats { | ||
| for _, metric := range makeMetrics(prefix, metrics, labels, d.compatibleMode) { | ||
| ch <- metric | ||
| } | ||
| } | ||
| } | ||
| } | ||
|
|
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| func fromMapToSlice(databases map[string][]string) []string { | ||
| var collections []string | ||
| for db, cols := range databases { | ||
| for _, value := range cols { | ||
| collections = append(collections, db+"."+value) | ||
| } | ||
| } | ||
|
|
||
| return collections | ||
| } | ||
|
|
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| var _ prometheus.Collector = (*collstatsCollector)(nil) |
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