PromQL

External

• https://prometheus.io/docs/prometheus/latest/querying/basics/
• https://prometheus.io/docs/prometheus/latest/querying/examples/
• https://prometheus.io/docs/prometheus/latest/querying/operators/
• https://prometheus.io/docs/prometheus/latest/querying/functions/
• https://prometheus.io/docs/prometheus/latest/querying/api/
• https://promlabs.com/promql-cheat-sheet/

Internal

• Prometheus Concepts

Data Types

Instant Vector

A set of time series containing a simple sample for each time series, all sharing the same timestamp.

Range Vector

A range vector is a set of time series containing a range of data points over time for each series. It is also known as "time ranged vector".

Scalar

A simple numeric floating point value.

String

A simple string value.

Organizatorium

Vectors. Instant vectors. Time ranged vectors.

Query for all series that are associated with a certain label:

some_metric{some_label!=""}

Query for all series that are associated with two labels:

some_metric{some_label!="",some_other_label!=""}