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watcher_namespaces.go
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/
watcher_namespaces.go
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package main
import (
"regexp"
"strings"
"github.com/prometheus/client_golang/prometheus"
log "github.com/sirupsen/logrus"
)
type NamespaceWatcher struct {
namespaceStats map[string]AerospikeStat
}
func (nw *NamespaceWatcher) describe(ch chan<- *prometheus.Desc) {}
func (nw *NamespaceWatcher) passOneKeys() []string {
return []string{"namespaces"}
}
func (nw *NamespaceWatcher) passTwoKeys(rawMetrics map[string]string) []string {
s := rawMetrics["namespaces"]
list := strings.Split(s, ";")
var infoKeys []string
for _, k := range list {
infoKeys = append(infoKeys, "namespace/"+k)
}
return infoKeys
}
// All (allowed/blocked) namespace stats. Based on the config.Aerospike.NamespaceMetricsAllowlist, config.Aerospike.NamespaceMetricsBlocklist.
// TODO: move this to NamespaceWatcher -- as thie belongs there
// var namespaceStats = make(map[string]AerospikeStat)
// Regex for identifying storage-engine stats.
func (nw *NamespaceWatcher) refresh(ott *Observer, infoKeys []string, rawMetrics map[string]string, ch chan<- prometheus.Metric) error {
seDynamicExtractor := regexp.MustCompile(`storage\-engine\.(?P<type>file|device)\[(?P<idx>\d+)\]\.(?P<metric>.+)`)
if nw.namespaceStats == nil {
nw.namespaceStats = make(map[string]AerospikeStat)
}
for _, ns := range infoKeys {
nsName := strings.ReplaceAll(ns, "namespace/", "")
log.Tracef("namespace-stats:%s:%s", nsName, rawMetrics[ns])
stats := parseStats(rawMetrics[ns], ";")
for stat, value := range stats {
pv, err := tryConvert(value)
if err != nil {
continue
}
// handle any panic from prometheus, this may occur when prom encounters a config/stat with special characters
defer func() {
if r := recover(); r != nil {
log.Tracef("namespace-stats: recovered from panic while handling stat %s in %s", stat, nsName)
}
}()
// to find regular metric or storage-engine metric, we split stat [using: seDynamicExtractor RegEx]
// after splitting, a storage-engine stat has 4 elements other stats have 3 elements
match := seDynamicExtractor.FindStringSubmatch(stat)
// process storage engine stat
if len(match) == 4 {
statType := match[1]
statIndex := match[2]
statName := match[3]
compositeStatName := STORAGE_ENGINE + statType + "_" + statName
asMetric, exists := nw.namespaceStats[compositeStatName]
if !exists {
asMetric = newAerospikeStat(CTX_NAMESPACE, compositeStatName)
nw.namespaceStats[compositeStatName] = asMetric
}
if asMetric.isAllowed {
deviceOrFileName := stats["storage-engine."+statType+"["+statIndex+"]"]
desc, valueType := asMetric.makePromMetric(METRIC_LABEL_CLUSTER_NAME, METRIC_LABEL_SERVICE, METRIC_LABEL_NS, statType+"_index", statType)
ch <- prometheus.MustNewConstMetric(desc, valueType, pv, rawMetrics[ikClusterName], rawMetrics[ikService], nsName, statIndex, deviceOrFileName)
}
} else { // regular stat (i.e. non-storage-engine related)
asMetric, exists := nw.namespaceStats[stat]
if !exists {
asMetric = newAerospikeStat(CTX_NAMESPACE, stat)
nw.namespaceStats[stat] = asMetric
}
if asMetric.isAllowed {
desc, valueType := asMetric.makePromMetric(METRIC_LABEL_CLUSTER_NAME, METRIC_LABEL_SERVICE, METRIC_LABEL_NS)
ch <- prometheus.MustNewConstMetric(desc, valueType, pv, rawMetrics[ikClusterName], rawMetrics[ikService], nsName)
}
}
}
}
return nil
}