How do I configure Prometheus?
Prometheus is configured via command-line flags and a configuration file. While the command-line flags configure immutable system parameters (such as storage locations, amount of data to keep on disk and in memory, etc.), the configuration file defines everything related to scraping jobs and their instances, as well as which rule files to load.
What is Prometheus and how does it work?
What is Prometheus? Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud. Since its inception in 2012, many companies and organizations have adopted Prometheus, and the project has a very active developer and user community.
What happens if Prometheus configuration is not well formed?
Configuration. If the new configuration is not well-formed, the changes will not be applied. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or sending a HTTP POST request to the /-/reload endpoint (when the –web.enable-lifecycle flag is enabled). This will also reload any configured rule files.
How does promoprometheus collect metrics from monitored targets?
Prometheus collects metrics from monitored targets by scraping metrics HTTP endpoints on these targets. Since Prometheus also exposes data in the same manner about itself, it can also scrape and monitor its own health.
What is Prometheus in Prometheus?
Prometheus provides a functional expression language that lets the user select and aggregate time series data in real time. The result of an expression can either be shown as a graph, viewed as tabular data in Prometheus’s expression browser, or consumed by external systems via the HTTP API.
What are the different types of expressions in Prometheus?
In Prometheus’s expression language, an expression or sub-expression can evaluate to one of four types: Instant vector – a set of time series containing a single sample for each time series, all sharing the same timestamp Range vector – a set of time series containing a range of data points over time for each time series
Can Prometheus reload its configuration at runtime?
Prometheus can reload its configuration at runtime. If the new configuration is not well-formed, the changes will not be applied. A configuration reload is triggered by sending a SIGHUP to the Prometheus process or sending a HTTP POST request to the /-/reload endpoint (when the –web.enable-lifecycle flag is enabled).