PCA PCA Federation & Remote Storage

Question 1

What is the primary purpose of Prometheus federation?

Accepted Answer

Aggregating metrics from multiple Prometheus servers into a single instance

Answer

Federation allows one Prometheus server to scrape selected metrics from another, enabling hierarchical aggregation across clusters or data centers.

Question 2

Which HTTP endpoint must be exposed on a Prometheus server for another Prometheus to federate from it?

Accepted Answer

/federate

Answer

The /federate endpoint is specifically designed to allow other Prometheus servers to scrape selected time series from it.

Question 3

Which query parameter is required when scraping the /federate endpoint to specify which metrics to pull?

Accepted Answer

match[]=

Answer

The match[] parameter accepts one or more instant vector selectors to specify which metric series should be included in the federation response.

Question 4

What is the primary use case for hierarchical federation in a large enterprise environment?

Accepted Answer

Collecting aggregated metrics from multiple data centers into a global Prometheus

Answer

Hierarchical federation is used to build a global Prometheus that scrapes aggregated or pre-recorded metrics from datacenter-level Prometheus servers.

Question 5

What does the remote_write configuration block in prometheus.yml enable?

Accepted Answer

Forwarding sampled metrics to a remote storage backend in near-real-time

Answer

remote_write sends metric samples to a compatible remote storage endpoint as they are ingested, enabling long-term or scalable storage.

(PCA) Prometheus Certified Associate Practice Test

(PCA) Prometheus Certified Associate Practice Test

PCA PCA Federation & Remote Storage