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Merge pull request #807 from tomwilkie/systemd-timers

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Export systemd timers last trigger seconds.
This commit is contained in:
Tom Wilkie 2018-02-01 13:05:56 +00:00 committed by GitHub
parent f9e91156d0 6833eec187
commit 05d14ef9ee
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GPG key ID: 4AEE18F83AFDEB23
2 changed files with 104 additions and 53 deletions
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61
collector/systemd_linux.go
View file

@ -18,6 +18,7 @@ package collector
import (
"fmt"
"regexp"
"strings"
"github.com/coreos/go-systemd/dbus"
"github.com/prometheus/client_golang/prometheus"
@ -35,6 +36,7 @@ type systemdCollector struct {
unitDesc *prometheus.Desc
systemRunningDesc *prometheus.Desc
summaryDesc *prometheus.Desc
timerLastTriggerDesc *prometheus.Desc
unitWhitelistPattern *regexp.Regexp
unitBlacklistPattern *regexp.Regexp
}
@ -61,6 +63,9 @@ func NewSystemdCollector() (Collector, error) {
summaryDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "units"),
"Summary of systemd unit states", []string{"state"}, nil)
timerLastTriggerDesc := prometheus.NewDesc(
prometheus.BuildFQName(namespace, subsystem, "timer_last_trigger_seconds"),
"Seconds since epoch of last trigger.", []string{"name"}, nil)
unitWhitelistPattern := regexp.MustCompile(fmt.Sprintf("^(?:%s)$", *unitWhitelist))
unitBlacklistPattern := regexp.MustCompile(fmt.Sprintf("^(?:%s)$", *unitBlacklist))
@ -68,6 +73,7 @@ func NewSystemdCollector() (Collector, error) {
unitDesc: unitDesc,
systemRunningDesc: systemRunningDesc,
summaryDesc: summaryDesc,
timerLastTriggerDesc: timerLastTriggerDesc,
unitWhitelistPattern: unitWhitelistPattern,
unitBlacklistPattern: unitBlacklistPattern,
}, nil
@ -84,6 +90,7 @@ func (c *systemdCollector) Update(ch chan<- prometheus.Metric) error {
units := filterUnits(allUnits, c.unitWhitelistPattern, c.unitBlacklistPattern)
c.collectUnitStatusMetrics(ch, units)
c.collectTimers(ch, units)
systemState, err := c.getSystemState()
if err != nil {
@ -94,7 +101,7 @@ func (c *systemdCollector) Update(ch chan<- prometheus.Metric) error {
return nil
}
func (c *systemdCollector) collectUnitStatusMetrics(ch chan<- prometheus.Metric, units []dbus.UnitStatus) {
func (c *systemdCollector) collectUnitStatusMetrics(ch chan<- prometheus.Metric, units []unit) {
for _, unit := range units {
for _, stateName := range unitStatesName {
isActive := 0.0
@ -108,6 +115,19 @@ func (c *systemdCollector) collectUnitStatusMetrics(ch chan<- prometheus.Metric,
}
}
func (c *systemdCollector) collectTimers(ch chan<- prometheus.Metric, units []unit) error {
for _, unit := range units {
if !strings.HasSuffix(unit.Name, ".timer") {
continue
}
ch <- prometheus.MustNewConstMetric(
c.timerLastTriggerDesc, prometheus.GaugeValue,
float64(unit.lastTriggerUsec)/1e6, unit.Name)
}
return nil
}
func (c *systemdCollector) collectSummaryMetrics(ch chan<- prometheus.Metric, summary map[string]float64) {
for stateName, count := range summary {
ch <- prometheus.MustNewConstMetric(
@ -130,22 +150,45 @@ func (c *systemdCollector) newDbus() (*dbus.Conn, error) {
return dbus.New()
}
func (c *systemdCollector) getAllUnits() ([]dbus.UnitStatus, error) {
type unit struct {
dbus.UnitStatus
lastTriggerUsec uint64
}
func (c *systemdCollector) getAllUnits() ([]unit, error) {
conn, err := c.newDbus()
if err != nil {
return nil, fmt.Errorf("couldn't get dbus connection: %s", err)
}
allUnits, err := conn.ListUnits()
conn.Close()
defer conn.Close()
allUnits, err := conn.ListUnits()
if err != nil {
return []dbus.UnitStatus{}, err
return nil, err
}
return allUnits, nil
result := make([]unit, 0, len(allUnits))
for _, status := range allUnits {
unit := unit{
UnitStatus: status,
}
if strings.HasSuffix(unit.Name, ".timer") {
lastTriggerValue, err := conn.GetUnitTypeProperty(unit.Name, "Timer", "LastTriggerUSec")
if err != nil {
return nil, fmt.Errorf("couldn't get unit '%s' LastTriggerUSec: %s", unit.Name, err)
}
unit.lastTriggerUsec = lastTriggerValue.Value.Value().(uint64)
}
result = append(result, unit)
}
return result, nil
}
func summarizeUnits(units []dbus.UnitStatus) map[string]float64 {
func summarizeUnits(units []unit) map[string]float64 {
summarized := make(map[string]float64)
for _, unitStateName := range unitStatesName {
@ -159,8 +202,8 @@ func summarizeUnits(units []dbus.UnitStatus) map[string]float64 {
return summarized
}
func filterUnits(units []dbus.UnitStatus, whitelistPattern, blacklistPattern *regexp.Regexp) []dbus.UnitStatus {
filtered := make([]dbus.UnitStatus, 0, len(units))
func filterUnits(units []unit, whitelistPattern, blacklistPattern *regexp.Regexp) []unit {
filtered := make([]unit, 0, len(units))
for _, unit := range units {
if whitelistPattern.MatchString(unit.Name) && !blacklistPattern.MatchString(unit.Name) {
filtered = append(filtered, unit)

96
collector/systemd_linux_test.go
View file

@ -22,61 +22,69 @@ import (
)
// Creates mock UnitLists
func getUnitListFixtures() [][]dbus.UnitStatus {
fixture1 := []dbus.UnitStatus{
func getUnitListFixtures() [][]unit {
fixture1 := []unit{
{
Name: "foo",
Description: "foo desc",
LoadState: "loaded",
ActiveState: "active",
SubState: "running",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/foo",
JobId: 0,
JobType: "",
JobPath: "/",
UnitStatus: dbus.UnitStatus{
Name: "foo",
Description: "foo desc",
LoadState: "loaded",
ActiveState: "active",
SubState: "running",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/foo",
JobId: 0,
JobType: "",
JobPath: "/",
},
},
{
Name: "bar",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
UnitStatus: dbus.UnitStatus{
Name: "bar",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
},
},
{
Name: "foobar",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
UnitStatus: dbus.UnitStatus{
Name: "foobar",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
},
},
{
Name: "baz",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
UnitStatus: dbus.UnitStatus{
Name: "baz",
Description: "bar desc",
LoadState: "not-found",
ActiveState: "inactive",
SubState: "dead",
Followed: "",
Path: "/org/freedesktop/systemd1/unit/bar",
JobId: 0,
JobType: "",
JobPath: "/",
},
},
}
fixture2 := []dbus.UnitStatus{}
fixture2 := []unit{}
return [][]dbus.UnitStatus{fixture1, fixture2}
return [][]unit{fixture1, fixture2}
}
func TestSystemdCollectorDoesntCrash(t *testing.T) {