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Loki

Tue, 01 Aug 2023 21:29:01 +0800

The architecture of Loki

A brief overview of components in Loki architecture:

Promtail - It is the log collection agent that runs on each node of a Kubernetes cluster.
Distributor - The first component to receive logs from promtail.
Ingestor - It builds compressed chunks of log data and flushes them out as chunks.
Querior - It handles the read path, scanning the index to figure out which chunks match

Prometheus

Tue, 01 Aug 2023 21:29:01 +0800

Prometheus

Prometheus - database of time series
Exporter - instrument for get metric
Alertmanager - notification and everything is connected with it

Basic startup parameters

We will start looking at the configuration file in the next task, but now let’s look at the main Prometheus startup keys:

--config.file="prometheus.yml" - which configuration file to use;

--web.listen-address="0.0.0.0:9090" - the address that the embedded web server will listen to;

--web.enable-admin-api - enable or disable administrative API via web-interface;

Victoria Metrics

Sun, 01 Jan 2023 21:29:01 +0800

Pre-setting

Installing packages Let’s make sure some packages are available:

tar - to unpack the archive with the binary. wget - to download the archive. curl - to execute queries to test the system. Depending on the Linux distribution, the installation will be slightly different.

for DEB-based systems (Astra Linux / Debian / Ubuntu):

apt install tar wget curl

for RPM-based systems (RED OS / Rocky Linux / CentOS):