PCA PCA Service Discovery & Targets 2

Question 1

What is the effect of setting `honor_labels: true` in a Prometheus scrape config?

Accepted Answer

Target-provided labels take precedence over server-side labels

Answer

When honor_labels is true, Prometheus keeps the labels exported by the target instead of overwriting them with its own labels.

Question 2

Which Prometheus SD mechanism discovers targets via DNS SRV records?

Accepted Answer

dns_sd_configs

Answer

dns_sd_configs uses DNS SRV records to discover scrape targets dynamically.

Question 3

What is the purpose of the `__metrics_path__` label in Prometheus service discovery?

Accepted Answer

It specifies the URL path on the target from which metrics are scraped

Answer

The __metrics_path__ label overrides the default /metrics path used when scraping a specific target.

Question 4

When using Kubernetes service discovery, which role discovers individual pod endpoints rather than services?

Accepted Answer

pod

Answer

The `pod` role in kubernetes_sd_configs discovers all running pods and exposes their container ports as scrape targets.

Question 5

How does Prometheus handle a target that becomes unreachable during service discovery?

Accepted Answer

It marks it as DOWN and continues attempting to scrape on the next interval

Answer

Prometheus records scrape failures as UP=0 for the target and retries on the next scrape interval without removing it.

(PCA) Prometheus Certified Associate Practice Test