// prometheusPushClient pushs metrics to Prometheus Pushgateway.
func prometheusPushClient(job, addr string, interval time.Duration) {
for {
err := push.FromGatherer(
job, push.HostnameGroupingKey(),
addr,
prometheus.DefaultGatherer,
)
if err != nil {
log.Errorf("could not push metrics to Prometheus Pushgateway: %v", err)
}
time.Sleep(interval)
}
}
func ExampleCollectors() {
completionTime := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_completion_timestamp_seconds",
Help: "The timestamp of the last succesful completion of a DB backup.",
})
completionTime.Set(float64(time.Now().Unix()))
if err := push.Collectors(
"db_backup", push.HostnameGroupingKey(),
"http://pushgateway:9091",
completionTime,
); err != nil {
fmt.Println("Could not push completion time to Pushgateway:", err)
}
}
// PrometheusPushClient pushs metrics to Prometheus Pushgateway.
func prometheusPushClient(addr string, interval time.Duration) {
// TODO: TiDB do not have uniq name, so we use host+port to compose a name.
job := "tidb"
for {
err := push.AddFromGatherer(
job, push.HostnameGroupingKey(),
addr,
prometheus.DefaultGatherer,
)
if err != nil {
log.Errorf("could not push metrics to Prometheus Pushgateway: %v", err)
}
time.Sleep(interval)
}
}
// pushMetrics attempts to send some new metrics to the server. It returns the new number of errors.
func (m *metrics) pushMetrics() int {
if !m.newMetrics {
return m.errors
}
start := time.Now()
m.newMetrics = false
if err := deadline(func() error {
return push.AddFromGatherer("please", push.HostnameGroupingKey(), m.url, prometheus.DefaultGatherer)
}, 500*time.Millisecond); err != nil {
log.Warning("Could not push metrics to the repository: %s", err)
m.newMetrics = true
return m.errors + 1
}
m.pushes += 1
log.Debug("Push #%d of metrics in %0.3fs", m.pushes, time.Since(start).Seconds())
return 0
}
func ExampleRegistry() {
registry := prometheus.NewRegistry()
completionTime := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_completion_timestamp_seconds",
Help: "The timestamp of the last succesful completion of a DB backup.",
})
registry.MustRegister(completionTime)
completionTime.Set(float64(time.Now().Unix()))
if err := push.FromGatherer(
"db_backup", push.HostnameGroupingKey(),
"http://pushgateway:9091",
registry,
); err != nil {
fmt.Println("Could not push completion time to Pushgateway:", err)
}
}