Metin2-InfluxDB

The purpose of this is to be able to create dashboards with the timeseries statistics, like the ones seen on the video made with Grafana.

Install InfluxDB: https://docs.influxdata.com/influxdb/v2.1/install/

ℹ️ Information

If you intend on using Cloudflare (and nginx as reverse proxy, since InfluxDB’s default port is 8086, which isn’t supported by Cloudflare, if you choose the docker installation, just map it to a port supported by Cloudflare, preferably HTTPS), you will need to create a firewall exception to bypass all rules that come from your metin2 game server so it doesn’t get blocked or challenged.

I recommend setting up nginx as reverse proxy, that way the port 443 can be used for all hosts configured on nginx.

On FreeBSD, only InfluxDB 1.8.* is available, not recommended, since the latest major stable version is 2.1. This tutorial was made for version 2.1, there may be differences on the requests.

An IP address can be used, but a domain with SSL setup is preferable, for obvious reasons.

InfluxDB Setup

Create an organization

Create a bucket

Lib cURL

FreeBSD Setup

Install it:

pkg install curl

And link it on the Makefile:

-lcurl

Windows Setup

For Windows it works with both vcpkg and compiling the lib manually.

Shared lib:

vcpkg install curl[openssl]:x86-windows

Static lib:

vcpkg install curl[openssl]:x86-windows-static

Auto Event Manager

In case you already have this class/file, just compare and make the necessary changes. All the changes related to Influx are wrapped with the macro INFLUX_STATS.

Don't forget to also make the necessary changes on main.cpp. If you are already using this you won't need to include the header and initialize the class.

Edit Time

The default is send the data every 10 minutes.

On the file InfluxData.cpp, edit this code:

void CInfluxData::Check(int day, int hour, int minute, int second) {
    int lastNumber = minute % 10;

    if (isInfluxEnabled && lastNumber == 0 && second == 00)

If lastNumber = 0, then it means the number is divisible by, in this case, 10. Make sure when you edit the time to don't forget the seconds part, if you don't use it, it will run every second inside the minute you want to run it.

Examples for other times

Every minute

    if (isInfluxEnabled && second == 00)

Every 5 minutes

    int lastNumber = minute % 5;

Every 30 seconds

    int lastNumber = seconds % 30;

    if (isInfluxEnabled && lastNumber == 0)

Configuration

To use this make sure you have it only enabled on ONE core per channel, the online counter inside the channel is common between the cores, just add this on the CONFIG file to enable Influx on the core.

INFLUX_ENABLE: 1

The rest of the settings, can either be set on the source or by CONFIG options (this are the default values set on the source):

INFLUX_URL: http://127.0.0.1:8086
INFLUX_TOKEN: <token>
INFLUX_ORG: <organization>
INFLUX_BUCKET: <bucket>

NodeJS Version

In case you don't to use the source, a NodeJS version is available where you can use the Metin2 API to get the user count and send it to Influx.

The source method is preferred.

Acknowledgments:

Gurgarath for testing the tutorial on Windows.
Deliris for testing the tutorial on FreeBSD.