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

Encrypting metrics at rest across clusters

Answer

Automatically discovering scrape targets across namespaces

Answer

Connecting Prometheus directly to Grafana dashboards

Question 2

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

Accepted Answer

/federate

Answer

/metrics

Answer

/api/v1/query

Answer

/api/v1/targets

Question 3

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

Accepted Answer

match[]=

Answer

filter=

Answer

selector=

Answer

metric_filter=

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

Sending alerts from multiple clusters to a single Alertmanager

Answer

Replicating raw metrics for high availability failover

Answer

Reducing per-target scrape intervals across regions

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

Reading historical metrics from a remote TSDB

Answer

Pushing alert rules to an external rules engine

Answer

Streaming live metrics to connected Grafana instances

Question 6

Which encoding format does Prometheus use by default when sending data via remote_write?

Accepted Answer

Protocol Buffers with Snappy compression over HTTPS

Answer

JSON over plain HTTP

Answer

MessagePack over WebSockets

Answer

Avro with gzip compression over gRPC

Question 7

What is the purpose of the remote_read configuration in Prometheus?

Accepted Answer

Querying historical metric data from a remote storage system to satisfy PromQL queries

Answer

Importing recording rules from a remote Prometheus instance

Answer

Receiving metrics pushed from remote exporters via HTTP

Answer

Fetching service discovery target lists from a remote endpoint