func WritePrometheusMetrics(logger *log.Logger, PROM_GATEWAY string, HOST string, metrics []Metric) error {
var err error
logger.Printf("writing %d metrics\n", len(metrics))
for i := 0; i < len(metrics); i++ {
//metrics[i].Print()
opts := prometheus.GaugeOpts{
Name: PREFIX + metrics[i].MetricName,
Help: "no help available",
}
labels := make(map[string]string)
labels["DatabaseName"] = metrics[i].DatabaseName
labels["Units"] = metrics[i].Units
if metrics[i].TableName != "" {
labels["TableName"] = metrics[i].TableName
}
if metrics[i].LockType != "" {
labels["LockType"] = metrics[i].LockType
labels["LockMode"] = metrics[i].LockMode
}
if metrics[i].LastVacuum != "" {
labels["LastVacuum"] = metrics[i].LastVacuum
labels["LastAnalyze"] = metrics[i].LastAnalyze
labels["AvNeeded"] = metrics[i].AvNeeded
}
if metrics[i].Age != "" {
labels["Age"] = metrics[i].Age
labels["Kind"] = metrics[i].Kind
}
if metrics[i].MetricName == "wraparound" {
labels["TableSz"] = strconv.FormatInt(metrics[i].TableSz, 10)
labels["TotalSz"] = strconv.FormatInt(metrics[i].TotalSz, 10)
}
if metrics[i].MetricName == "pct_dead" {
labels["DeadTup"] = strconv.FormatInt(metrics[i].DeadTup, 10)
labels["RelTup"] = strconv.FormatInt(metrics[i].RelTup, 10)
labels["TableSz"] = strconv.FormatInt(metrics[i].TableSz, 10)
labels["TotalSz"] = strconv.FormatInt(metrics[i].TotalSz, 10)
}
opts.ConstLabels = labels
newMetric := prometheus.NewGauge(opts)
newMetric.Set(float64(metrics[i].Value))
if err := prometheus.PushCollectors(
metrics[i].MetricName, HOST,
PROM_GATEWAY,
newMetric,
); err != nil {
logger.Println("Could not push " + metrics[i].MetricName + "completion time to Pushgateway:" + err.Error())
return err
}
}
return err
}
func ExamplePushCollectors() {
hostname, _ := os.Hostname()
completionTime := prometheus.NewGauge(prometheus.GaugeOpts{
Name: "db_backup_last_completion_time",
Help: "The timestamp of the last succesful completion of a DB backup.",
})
completionTime.Set(float64(time.Now().Unix()))
if err := prometheus.PushCollectors(
"db_backup", hostname,
"http://pushgateway:9091",
completionTime,
); err != nil {
fmt.Println("Could not push completion time to Pushgateway:", err)
}
}