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// SPDX-License-Identifier: GPL-3.0-or-later
package couchbase
import (
"encoding/json"
"fmt"
"io"
"net/http"
"net/url"
"github.com/netdata/netdata/go/go.d.plugin/agent/module"
"github.com/netdata/netdata/go/go.d.plugin/pkg/web"
)
const (
urlPathBucketsStats = "/pools/default/buckets"
precision = 1000
)
func (cb *Couchbase) collect() (map[string]int64, error) {
ms, err := cb.scrapeCouchbase()
if err != nil {
return nil, fmt.Errorf("error on scraping couchbase: %v", err)
}
if ms.empty() {
return nil, nil
}
collected := make(map[string]int64)
cb.collectBasicStats(collected, ms)
return collected, nil
}
func (cb *Couchbase) collectBasicStats(collected map[string]int64, ms *cbMetrics) {
for _, b := range ms.BucketsBasicStats {
if !cb.collectedBuckets[b.Name] {
cb.collectedBuckets[b.Name] = true
cb.addBucketToCharts(b.Name)
}
bs := b.BasicStats
collected[indexDimID(b.Name, "quota_percent_used")] = int64(bs.QuotaPercentUsed * precision)
collected[indexDimID(b.Name, "ops_per_sec")] = int64(bs.OpsPerSec * precision)
collected[indexDimID(b.Name, "disk_fetches")] = int64(bs.DiskFetches)
collected[indexDimID(b.Name, "item_count")] = int64(bs.ItemCount)
collected[indexDimID(b.Name, "disk_used")] = int64(bs.DiskUsed)
collected[indexDimID(b.Name, "data_used")] = int64(bs.DataUsed)
collected[indexDimID(b.Name, "mem_used")] = int64(bs.MemUsed)
collected[indexDimID(b.Name, "vb_active_num_non_resident")] = int64(bs.VbActiveNumNonResident)
}
}
func (cb *Couchbase) addBucketToCharts(bucket string) {
cb.addDimToChart(bucketQuotaPercentUsedChart.ID, &module.Dim{
ID: indexDimID(bucket, "quota_percent_used"),
Name: bucket,
Div: precision,
})
cb.addDimToChart(bucketOpsPerSecChart.ID, &module.Dim{
ID: indexDimID(bucket, "ops_per_sec"),
Name: bucket,
Div: precision,
})
cb.addDimToChart(bucketDiskFetchesChart.ID, &module.Dim{
ID: indexDimID(bucket, "disk_fetches"),
Name: bucket,
})
cb.addDimToChart(bucketItemCountChart.ID, &module.Dim{
ID: indexDimID(bucket, "item_count"),
Name: bucket,
})
cb.addDimToChart(bucketDiskUsedChart.ID, &module.Dim{
ID: indexDimID(bucket, "disk_used"),
Name: bucket,
})
cb.addDimToChart(bucketDataUsedChart.ID, &module.Dim{
ID: indexDimID(bucket, "data_used"),
Name: bucket,
})
cb.addDimToChart(bucketMemUsedChart.ID, &module.Dim{
ID: indexDimID(bucket, "mem_used"),
Name: bucket,
})
cb.addDimToChart(bucketVBActiveNumNonResidentChart.ID, &module.Dim{
ID: indexDimID(bucket, "vb_active_num_non_resident"),
Name: bucket,
})
}
func (cb *Couchbase) addDimToChart(chartID string, dim *module.Dim) {
chart := cb.Charts().Get(chartID)
if chart == nil {
cb.Warningf("error on adding '%s' dimension: can not find '%s' chart", dim.ID, chartID)
return
}
if err := chart.AddDim(dim); err != nil {
cb.Warning(err)
return
}
chart.MarkNotCreated()
}
func (cb *Couchbase) scrapeCouchbase() (*cbMetrics, error) {
ms := &cbMetrics{}
req, _ := web.NewHTTPRequest(cb.Request)
req.URL.Path = urlPathBucketsStats
req.URL.RawQuery = url.Values{"skipMap": []string{"true"}}.Encode()
if err := cb.doOKDecode(req, &ms.BucketsBasicStats); err != nil {
return nil, err
}
return ms, nil
}
func (cb *Couchbase) doOKDecode(req *http.Request, in interface{}) error {
resp, err := cb.httpClient.Do(req)
if err != nil {
return fmt.Errorf("error on HTTP request '%s': %v", req.URL, err)
}
defer closeBody(resp)
if resp.StatusCode != http.StatusOK {
return fmt.Errorf("'%s' returned HTTP status code: %d", req.URL, resp.StatusCode)
}
if err := json.NewDecoder(resp.Body).Decode(in); err != nil {
return fmt.Errorf("error on decoding response from '%s': %v", req.URL, err)
}
return nil
}
func closeBody(resp *http.Response) {
if resp != nil && resp.Body != nil {
_, _ = io.Copy(io.Discard, resp.Body)
_ = resp.Body.Close()
}
}
func indexDimID(name, metric string) string {
return fmt.Sprintf("bucket_%s_%s", name, metric)
}
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