學習Grafana初級使用

PromQL

Prometheus privides a functional query language called PromQL (Prometheus Query Language) that lets the user select and aggregate time series data in real time.

The result of an exporession 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 is Prometheus

Prometheus is an open-source systems monitoring and alerting toolkit originally built at SoundCloud.

It’s the leading open-source monitoring framework and TSDB.

It is now a standalone open source project and maintained independently of any company. To emphasize this ,and to clarify the project’s governance structure, promeheus joined the Cloud Native Computing Foundation In 2016 as the second hosted project, agter Kubernetes.

Cloud Native Computing Foundation

The Cloud Native Computing Foundation (CNCF) hosts critical components of the global techology infrastructure. CNCF brings together the world’s top developers, end users, and vendors and runs the largest open source developer conferences. CNCF is part of the nonprofit Linux Foundation.

CNCF serves as the verdor-neutral home for many of the fastest-growing open source projects, including Kubernetes, Promotheus, and Envoy.

Kubernetes(K8s)

Kubernetes is an open-source system for automating deployment, scaling, and management of containerized applications.

Prometheus vs. Grafana

《理解Prometheus vs. Grafana》

Loki

Loki is horizontally-scalable, highly-avaiable, multi-tenant log aggregation system inspired by Prometheus. It is designed to be very cost effective and easy to operate. It does not index the contents of the logs, but rather a set of labels for each log stream.

Structures

Dashboards consist of panels, panel consists of a query and a visualization.