Documentation

<a href="https://grafana.com/oss/loki/" rel="noopener" target="_blank">Loki</a> is a horizontally-scalable, highly-available, multi-tenant log aggregation system inspired by <a href="https://prometheus.io/" rel="noopener" target="_blank">Prometheus</a>.
Compared to other log aggregation systems, Loki:
<ul>
<li>Indexes a set of labels for each log stream, instead of indexing the context of logs.</li>
<li>Indexes and groups log streams using the same labels as Prometheus.</li>
<li>Automatically scrapes and indexes Kubernetes](<a href="https://kubernetes.io/" rel="noopener" target="_blank">https://kubernetes.io/</a>) metadata, such as pod logs.</li>
<li>Has native support in Grafana v6.0.</li>
</ul>
A Loki-based logging stack consists of 3 components:
<ul>
<li>Promtail is the agent, responsible for gathering logs and sending them to Loki.</li>
<li>Loki is the main server, responsible for storing logs and processing queries.</li>
<li>Grafana is platform, responsible for querying and displaying the logs.</li>
</ul>
Notes:
<ul>
<li>This stack requires a minimum configuration of two nodes at the $10/month plan (2GB memory / 1 vCPU).</li>
<li>The Loki stack 1-Click App also includes a $1/month block storage for Loki time series database (starting at PVs of 5GB).</li>
</ul>

Loki

Promtail

The kubernetes native log-aggregation system that is easy to scale.