func checkRecentToken(client *influx.Client, token, host string, errors chan error) {
for _, qfmt := range influxDbSeriesCheckQueries {
query := fmt.Sprintf(qfmt, token)
results, err := client.Query(query, influx.Second)
if err != nil || len(results) == 0 {
errors <- fmt.Errorf("at=influxdb-health err=%q result_length=%d host=%q query=%q", err, len(results), host, query)
continue
}
t, ok := results[0].Points[0][0].(float64)
if !ok {
errors <- fmt.Errorf("at=influxdb-health err=\"time column was not a number\" host=%q query=%q", host, query)
continue
}
ts := time.Unix(int64(t), int64(0)).UTC()
now := time.Now().UTC()
if now.Sub(ts) > influxDbStaleTimeout {
errors <- fmt.Errorf("at=influxdb-health err=\"stale data\" host=%q ts=%q now=%q query=%q", host, ts, now, query)
}
}
}
