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prometheus_grafana/readme.md
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@ -296,7 +296,9 @@ Some concept, highlights and examples of PromQL.
PromQL returns results as vectors"
* [The official](https://prometheus.io/docs/prometheus/latest/querying/basics/) basics page, quite to the point and short
* [Introduction to PromQL](https://blog.knoldus.com/introduction-to-promql/)
* [relatively short video to the point](https://youtu.be/yLPTHinHB6Y)
* [Prometheus Cheat Sheet - How to Join Multiple Metrics](https://iximiuz.com/en/posts/prometheus-vector-matching/)
* [decent stackoverflow answer](https://stackoverflow.com/questions/68223824/prometheus-instant-vector-vs-range-vector)
@ -839,7 +841,7 @@ What can be seen in this example:
**Requirements** - grafana, loki, minecraft.
![logo](https://i.imgur.com/M1k0Dn4.png)
![logo](https://i.imgur.com/VphJTKG.png)
### The Setup
@ -894,8 +896,8 @@ networks:
</details>
**Promtail's config** is similar to the generic config in the previous section.<br>
The only addition is a short **pipeline** stage with **regex** that runs against
every log line before sending it to Loki. When matched **a label** `player`
The only addition is a short **pipeline** stage with a **regex** that runs against
every log line before sending it to Loki. When a line matches, **a label** `player`
is added to that log line.
The value of that label comes from the **named capture group** thats part of
that regex, the [syntax](https://www.regular-expressions.info/named.html)
@ -926,11 +928,11 @@ scrape_configs:
</details>
[Here's regex101](https://regex101.com/r/5vkOU2/1) of it,
with some data to show how it works and bit of explanation.
[Here](https://stackoverflow.com/questions/74937454/how-to-add-custom-labels-in-promtail-config)
is stackoverflow answer that is the source for that config.
with some data to show how it works and bit of explanation.<br>
[Here's](https://stackoverflow.com/a/74962269/1383369)
the stackoverflow answer that is the source for that config.
![logo](https://i.imgur.com/LuUBZFn.png)
![regex](https://i.imgur.com/bT5XSHn.png)
### First steps in Grafana
@ -942,6 +944,8 @@ This Explore view will be recreated as a dashboard.
### Dashboard minecraft_logs
![dashboard-minecraft](https://i.imgur.com/M1k0Dn4.png)
* New dashboard, new panel
* Data source - Loki
* Switch from `builder` to `code`<br>
@ -972,10 +976,15 @@ for grafana loki queries
## Alerts in Grafana for Loki
![alert-labels](https://i.imgur.com/LuUBZFn.png)
When a player joins minecraft server a log appears *"Bastard joined the game"*<br>
Alert will be set to look for string *"joined the game"* and send notification
when it occurs.
At this point might be good time to brush up on promQL/logQL and the data types
they return when a query happens. That instant vector and range vector thingie.
### Create alert rule
- **1 Set an alert rule name**