NRestarts or NRefused aren't available on older systemd versions (#1039)
* If NRestarts or NRefused are not available, don't ignore the unit itself * Don't report systemd metrics (NRestarts/NRefused) that are not available Signed-off-by: James Hartig <james@getadmiral.com>
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@ -9,6 +9,7 @@ The wifi collector is disabled by default due to suspected caching issues and go
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* https://github.com/prometheus/node_exporter/issues/1008
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* [CHANGE] Filter out non-installed units when collecting all systemd units #1011
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* [CHANGE] `service_restart_total` and `socket_refused_connections_total` will not be reported if you're running an older version of systemd
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* [FEATURE] Collect NRefused property for systemd socket units (available as of systemd v239)
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* [FEATURE] Collect NRestarts property for systemd service units
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* [FEATURE] Add socket unit stats to systemd collector #968
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@ -16,6 +17,7 @@ The wifi collector is disabled by default due to suspected caching issues and go
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* [ENHANCEMENT]
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* [BUGFIX] Fix goroutine leak in supervisord collector
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* [BUGFIX] Systemd units will not be ignored if you're running older versions of systemd #1039
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* [BUGFIX] Handle vanishing PIDs #1043
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## 0.16.0 / 2018-05-15
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@ -140,10 +140,10 @@ func (c *systemdCollector) collectUnitStatusMetrics(ch chan<- prometheus.Metric,
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c.unitDesc, prometheus.GaugeValue, isActive,
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unit.Name, stateName)
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}
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if strings.HasSuffix(unit.Name, ".service") {
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if strings.HasSuffix(unit.Name, ".service") && unit.nRestarts != nil {
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ch <- prometheus.MustNewConstMetric(
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c.nRestartsDesc, prometheus.CounterValue,
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float64(unit.nRestarts), unit.Name)
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float64(*unit.nRestarts), unit.Name)
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}
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}
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}
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@ -160,9 +160,11 @@ func (c *systemdCollector) collectSockets(ch chan<- prometheus.Metric, units []u
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ch <- prometheus.MustNewConstMetric(
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c.socketCurrentConnectionsDesc, prometheus.GaugeValue,
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float64(unit.currentConnections), unit.Name)
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ch <- prometheus.MustNewConstMetric(
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c.socketRefusedConnectionsDesc, prometheus.GaugeValue,
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float64(unit.refusedConnections), unit.Name)
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if unit.refusedConnections != nil {
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ch <- prometheus.MustNewConstMetric(
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c.socketRefusedConnectionsDesc, prometheus.GaugeValue,
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float64(*unit.refusedConnections), unit.Name)
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}
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}
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}
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@ -212,10 +214,10 @@ type unit struct {
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dbus.UnitStatus
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lastTriggerUsec uint64
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startTimeUsec uint64
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nRestarts uint32
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nRestarts *uint32
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acceptedConnections uint32
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currentConnections uint32
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refusedConnections uint32
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refusedConnections *uint32
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}
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func (c *systemdCollector) getAllUnits() ([]unit, error) {
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@ -241,40 +243,47 @@ func (c *systemdCollector) getAllUnits() ([]unit, error) {
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if strings.HasSuffix(unit.Name, ".timer") {
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lastTriggerValue, err := conn.GetUnitTypeProperty(unit.Name, "Timer", "LastTriggerUSec")
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if err != nil {
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return nil, fmt.Errorf("couldn't get unit '%s' LastTriggerUSec: %s", unit.Name, err)
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log.Debugf("couldn't get unit '%s' LastTriggerUSec: %s\n", unit.Name, err)
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continue
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}
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unit.lastTriggerUsec = lastTriggerValue.Value.Value().(uint64)
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}
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if strings.HasSuffix(unit.Name, ".service") {
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nRestarts, err := conn.GetUnitTypeProperty(unit.Name, "Service", "NRestarts")
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// NRestarts wasn't added until systemd 235.
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restartsCount, err := conn.GetUnitTypeProperty(unit.Name, "Service", "NRestarts")
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if err != nil {
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log.Debugf("couldn't get unit '%s' NRestarts: %s\n", unit.Name, err)
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continue
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} else {
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nRestarts := restartsCount.Value.Value().(uint32)
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unit.nRestarts = &nRestarts
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}
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unit.nRestarts = nRestarts.Value.Value().(uint32)
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}
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if strings.HasSuffix(unit.Name, ".socket") {
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acceptedConnectionCount, err := conn.GetUnitTypeProperty(unit.Name, "Socket", "NAccepted")
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if err != nil {
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return nil, fmt.Errorf("couldn't get unit '%s' NAccepted: %s", unit.Name, err)
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log.Debugf("couldn't get unit '%s' NAccepted: %s\n", unit.Name, err)
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continue
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}
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unit.acceptedConnections = acceptedConnectionCount.Value.Value().(uint32)
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currentConnectionCount, err := conn.GetUnitTypeProperty(unit.Name, "Socket", "NConnections")
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if err != nil {
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return nil, fmt.Errorf("couldn't get unit '%s' NConnections: %s", unit.Name, err)
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log.Debugf("couldn't get unit '%s' NConnections: %s\n", unit.Name, err)
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continue
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}
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unit.currentConnections = currentConnectionCount.Value.Value().(uint32)
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// NRefused wasn't added until systemd 239.
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refusedConnectionCount, err := conn.GetUnitTypeProperty(unit.Name, "Socket", "NRefused")
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if err != nil {
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log.Debugf("couldn't get unit '%s' NRefused: %s\n", unit.Name, err)
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continue
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} else {
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nRefused := refusedConnectionCount.Value.Value().(uint32)
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unit.refusedConnections = &nRefused
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}
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unit.refusedConnections = refusedConnectionCount.Value.Value().(uint32)
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}
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if unit.ActiveState != "active" {
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@ -282,7 +291,8 @@ func (c *systemdCollector) getAllUnits() ([]unit, error) {
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} else {
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timestampValue, err := conn.GetUnitProperty(unit.Name, "ActiveEnterTimestamp")
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if err != nil {
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return nil, fmt.Errorf("couldn't get unit '%s' StartTimeUsec: %s", unit.Name, err)
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log.Debugf("couldn't get unit '%s' StartTimeUsec: %s\n", unit.Name, err)
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continue
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}
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unit.startTimeUsec = timestampValue.Value.Value().(uint64)
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