feat: set up metric to 0 if errors found
The `up` metric is now based on whether an error was found while reading data from the database to build other metrics. Note that there is a chance the `up` metric will not be correctly set if the last metric to be built before the `up` metric does not throw an error.
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@ -42,7 +42,8 @@ var (
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)
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type Exporter struct {
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db *fail2banDb.Fail2BanDB
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db *fail2banDb.Fail2BanDB
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lastError error
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}
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func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
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@ -53,16 +54,26 @@ func (e *Exporter) Describe(ch chan<- *prometheus.Desc) {
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}
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func (e *Exporter) Collect(ch chan<- prometheus.Metric) {
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ch <- prometheus.MustNewConstMetric(
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metricUp, prometheus.GaugeValue, 1,
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)
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e.collectBadIpsPerJailMetrics(ch)
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e.collectBannedIpsPerJailMetrics(ch)
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e.collectEnabledJailMetrics(ch)
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e.collectUpMetric(ch)
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}
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func (e *Exporter) collectUpMetric(ch chan<- prometheus.Metric) {
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var upMetricValue float64 = 1
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if e.lastError != nil {
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upMetricValue = 0
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}
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ch <- prometheus.MustNewConstMetric(
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metricUp, prometheus.GaugeValue, upMetricValue,
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)
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}
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func (e *Exporter) collectBadIpsPerJailMetrics(ch chan<- prometheus.Metric) {
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jailNameToCountMap, err := e.db.CountBadIpsPerJail()
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e.lastError = err
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if err != nil {
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log.Print(err)
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}
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@ -76,6 +87,8 @@ func (e *Exporter) collectBadIpsPerJailMetrics(ch chan<- prometheus.Metric) {
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func (e *Exporter) collectBannedIpsPerJailMetrics(ch chan<- prometheus.Metric) {
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jailNameToCountMap, err := e.db.CountBannedIpsPerJail()
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e.lastError = err
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if err != nil {
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log.Print(err)
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}
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@ -89,6 +102,8 @@ func (e *Exporter) collectBannedIpsPerJailMetrics(ch chan<- prometheus.Metric) {
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func (e *Exporter) collectEnabledJailMetrics(ch chan<- prometheus.Metric) {
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jailNameToEnabledMap, err := e.db.JailNameToEnabledValue()
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e.lastError = err
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if err != nil {
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log.Print(err)
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}
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