Target Down

TargetDown #

Meaning #

The alert means that one or more prometheus scrape targets are down. It fires when at least 10% of scrape targets in a Service are unreachable.

Metrics from a particular target cannot be scraped as such there is no data for this target in Prometheus and alerting can be hindered.

/targets page in Prometheus UI can be used to check the scrape error for the particular target.

up == 0 query can be used to check the trend over time.

Mitigation depends on the error reported by prometheus and there is no generic one.