Difference between revisions of "Server Metrics using Prometheus"

Revision as of 19:50, 19 February 2021

Prometheus

What is Prometheus?

Prometheus is an "open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach".

Minetest has built-in support for prometheus, allowing you to see metrics about your server - such as player count and performance information.

Get or build the prometheus-cpp library

You may be able to find prometheus-cpp in your distro's package manager. Otherwise, you'll need to build it and make it available to Minetest.

Here's how you do that on Linux:

cd /tmp
git clone --recursive https://github.com/jupp0r/prometheus-cpp
mkdir prometheus-cpp/build
cd prometheus-cpp/build
cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTING=0
make -j$(nproc)
sudo make install

Build Minetest

Now, you need build minetest with Prometheus enabled

cmake . -DENABLE_PROMETHEUS
make -j$(nproc)

Configure prometheus

Prometheus will make HTTP requests to Minetest's prometheus-cpp library to get the metrics.

You can set the prometheus listen address like so:

prometheus_listener_address = 127.0.0.1:30000

Grafana

You can link up Prometheus to Grafana to make nice web graphs. For example: rubenwardy.com

@@ Line 1: / Line 1: @@
+== Prometheus ==
+=== What is Prometheus? ===
+Prometheus is an "open-source monitoring system with a dimensional data model, flexible query language, efficient time series database and modern alerting approach".
+Minetest has built-in support for prometheus, allowing you to see metrics about your server - such as player count and performance information.
+=== Get or build the prometheus-cpp library ===
+You may be able to find prometheus-cpp in your distro's package manager.
+Otherwise, you'll need to build it and make it available to Minetest.
+Here's how you do that on Linux:
 <syntaxhighlight lang="bash">cd /tmp
 git clone --recursive https://github.com/jupp0r/prometheus-cpp
@@ Line 4: / Line 19: @@
 cd prometheus-cpp/build
 cmake .. -DCMAKE_INSTALL_PREFIX=/usr/local -DCMAKE_BUILD_TYPE=Release -DENABLE_TESTING=0
-make -j2
+make -j$(nproc)
 sudo make install</syntaxhighlight>
+=== Build Minetest ===
+Now, you need build minetest with Prometheus enabled
+<syntaxhighlight lang="bash">cmake . -DENABLE_PROMETHEUS
+make -j$(nproc)</syntaxhighlight>
+=== Configure prometheus ===
+Prometheus will make HTTP requests to Minetest's prometheus-cpp library to get the metrics.
+You can set the prometheus listen address like so:
+<code><pre>prometheus_listener_address = 127.0.0.1:30000</pre></code>
+== Grafana ==
-<syntaxhighlight lang="lua">noise_params = {
+You can link up Prometheus to Grafana to make nice web graphs. For example:
-    offset  = 0,
+[https://monitor.rubenwardy.com/d/r6cCl68mk/minetest-servers rubenwardy.com]
-    scale   = 1,
-    spread  = {x=250, y=250, z=250},
-    seed    = 12345,
-    octaves = 3,
-    persist = 0.6,
-    lacunarity = 2,
-    flags = "defaults",
-}</syntaxhighlight>