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Add systemd uptime metric collection (#952)

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* Add systemd uptime metric collection

Signed-off-by: Sven Lange <tdl@hadiko.de>
This commit is contained in:
Sven Lange 2018-07-18 16:02:05 +02:00 committed by Ben Kochie
parent 354115511c
commit 2ae8c1c7a7
2 changed files with 28 additions and 0 deletions
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1
CHANGELOG.md
View file

@ -6,6 +6,7 @@
* [FEATURE] Collect NRefused property for systemd socket units (available as of systemd v239)
* [FEATURE] Collect NRestarts property for systemd service units
* [FEATURE] Add socket unit stats to systemd collector #968
* [FEATURE] Collect start time for systemd units
* [ENHANCEMENT]
* [BUGFIX]

27
collector/systemd_linux.go
View file

@ -34,6 +34,7 @@ var (
type systemdCollector struct {
unitDesc *prometheus.Desc
unitStartTimeDesc *prometheus.Desc
systemRunningDesc *prometheus.Desc
summaryDesc *prometheus.Desc
nRestartsDesc *prometheus.Desc
@ -59,6 +60,10 @@ func NewSystemdCollector() (Collector, error) {
prometheus.BuildFQName(namespace, subsystem, "unit_state"),
"Systemd unit", []string{"name", "state"}, nil,
)
unitStartTimeDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "unit_start_time_seconds"),
"Start time of the unit since unix epoch in seconds.", []string{"name"}, nil,
)
systemRunningDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "system_running"),
"Whether the system is operational (see 'systemctl is-system-running')",
@ -87,6 +92,7 @@ func NewSystemdCollector() (Collector, error) {
return &systemdCollector{
unitDesc: unitDesc,
unitStartTimeDesc: unitStartTimeDesc,
systemRunningDesc: systemRunningDesc,
summaryDesc: summaryDesc,
nRestartsDesc: nRestartsDesc,
@ -110,6 +116,7 @@ func (c *systemdCollector) Update(ch chan<- prometheus.Metric) error {
units := filterUnits(allUnits, c.unitWhitelistPattern, c.unitBlacklistPattern)
c.collectUnitStatusMetrics(ch, units)
c.collectUnitStartTimeMetrics(ch, units)
c.collectTimers(ch, units)
c.collectSockets(ch, units)
@ -160,6 +167,14 @@ func (c *systemdCollector) collectSockets(ch chan<- prometheus.Metric, units []u
return nil
}
func (c *systemdCollector) collectUnitStartTimeMetrics(ch chan<- prometheus.Metric, units []unit) {
for _, unit := range units {
ch <- prometheus.MustNewConstMetric(
c.unitStartTimeDesc, prometheus.GaugeValue,
float64(unit.startTimeUsec)/1e6, unit.Name)
}
}
func (c *systemdCollector) collectTimers(ch chan<- prometheus.Metric, units []unit) error {
for _, unit := range units {
if !strings.HasSuffix(unit.Name, ".timer") {
@ -198,6 +213,7 @@ func (c *systemdCollector) newDbus() (*dbus.Conn, error) {
type unit struct {
dbus.UnitStatus
lastTriggerUsec uint64
startTimeUsec uint64
nRestarts uint32
acceptedConnections uint32
currentConnections uint32
@ -261,6 +277,17 @@ func (c *systemdCollector) getAllUnits() ([]unit, error) {
unit.refusedConnections = refusedConnectionCount.Value.Value().(uint32)
}
if unit.ActiveState != "active" {
unit.startTimeUsec = 0
} else {
timestampValue, err := conn.GetUnitProperty(unit.Name, "ActiveEnterTimestamp")
if err != nil {
return nil, fmt.Errorf("couldn't get unit '%s' StartTimeUsec: %s", unit.Name, err)
}
unit.startTimeUsec = timestampValue.Value.Value().(uint64)
}
result = append(result, unit)
}