PCA PCA Federation & Remote Storage 2

Question 1

In cross-service federation, which metrics are typically federated up to a global Prometheus server?

Accepted Answer

Pre-aggregated or recording-rule-generated metrics relevant at the global level

Answer

Cross-service federation is used to pull a curated subset of high-level metrics (often generated by recording rules) rather than all raw data, keeping the global Prometheus lean.

Question 2

What happens to 'job' and 'instance' labels when metrics are federated from one Prometheus server to another?

Accepted Answer

They are preserved as-is from the originating Prometheus server

Answer

When Prometheus federates metrics, it preserves the original labels including job and instance, because honor_labels defaults to true in typical federation scrape configs.

Question 3

Which open-source project extends Prometheus with global query capability and long-term object storage integration?

Accepted Answer

Thanos

Answer

Thanos adds a sidecar to Prometheus that uploads blocks to object storage (e.g., S3, GCS) and provides a global query layer across multiple Prometheus instances.

Question 4

What does the queue_config section within a remote_write block control?

Accepted Answer

Tuning parameters for the in-memory send queue such as capacity, batch size, and retry behavior

Answer

queue_config lets operators tune how many samples are buffered, how large each batch is, and how Prometheus handles backpressure or failures when writing to remote storage.

Question 5

Which long-term Prometheus storage solution is developed and maintained by Grafana Labs?

Accepted Answer

Mimir

Answer

Grafana Mimir is the current open-source, horizontally scalable long-term storage solution for Prometheus developed by Grafana Labs, succeeding Cortex.

(PCA) Prometheus Certified Associate Practice Test

(PCA) Prometheus Certified Associate Practice Test

PCA PCA Federation & Remote Storage 2