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Remove the automatic minecraft server stuff (for now)

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Update my minecraft username/uuid as well
This commit is contained in:
Evie Litherland-Smith 2024-03-10 08:07:05 +00:00
parent ba29776e6c
commit b3063a23d7
1 changed files with 5 additions and 150 deletions
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155
services/minecraft.nix
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@ -1,98 +1,21 @@
# Configuration from https://dataswamp.org/~solene/2022-08-20-on-demand-minecraft-with-systemd.html
{ {
config, config,
lib, lib,
pkgs, pkgs,
modulesPath, modulesPath,
... ...
}: let }: {
# check every 15 minutes if the server
# need to be stopped
frequency-check-players = "*-*-* *:0/15";
# time in second before we could stop the server
# this should let it time to spawn
minimum-server-lifetime = 300;
# minecraft port
# used in a few places in the code
# this is not the port that should be used publicly
# don't need to open it on the firewall
minecraft-port = 25564;
# this is the port that will trigger the server start
# and the one that should be used by players
# you need to open it in the firewall
public-port = 25565;
# a rcon password used by the local systemd commands
# to get information about the server such as the
# player list
# this will be stored plaintext in the store
rcon-password = "260a368f55f4fb4fa";
# a script used by hook-minecraft.service
# to start minecraft and the timer regularly
# polling for stopping it
start-mc = pkgs.writeShellScriptBin "start-mc" ''
systemctl start minecraft-server.service
systemctl start stop-minecraft.timer
'';
# wait 60s for a TCP socket to be available
# to wait in the proxifier
# idea found in https://blog.developer.atlassian.com/docker-systemd-socket-activation/
wait-tcp = pkgs.writeShellScriptBin "wait-tcp" ''
for i in `seq 60`; do
if ${pkgs.libressl.nc}/bin/nc -z 127.0.0.1 ${toString minecraft-port} > /dev/null ; then
exit 0
fi
${pkgs.busybox.out}/bin/sleep 1
done
exit 1
'';
# script returning true if the server has to be shutdown
# for minecraft, uses rcon to get the player list
# skips the checks if the service started less than minimum-server-lifetime
no-player-connected = pkgs.writeShellScriptBin "no-player-connected" ''
servicestartsec=$(date -d "$(systemctl show --property=ActiveEnterTimestamp minecraft-server.service | cut -d= -f2)" +%s)
serviceelapsedsec=$(( $(date +%s) - servicestartsec))
# exit if the server started less than 5 minutes ago
if [ $serviceelapsedsec -lt ${toString minimum-server-lifetime} ]
then
echo "server is too young to be stopped"
exit 1
fi
PLAYERS=`printf "list\n" | ${pkgs.rcon.out}/bin/rcon -m -H 127.0.0.1 -p 25575 -P ${rcon-password}`
if echo "$PLAYERS" | grep "are 0 of a"
then
exit 0
else
exit 1
fi
'';
in {
networking.firewall = {
allowedTCPPorts = [public-port];
allowedUDPPorts = [public-port];
};
# use NixOS module to declare your Minecraft
# rcon is mandatory for no-player-connected
services.minecraft-server = { services.minecraft-server = {
enable = true; enable = true;
eula = true; eula = true;
openFirewall = false; openFirewall = true;
declarative = true; declarative = true;
whitelist = { whitelist = {
"Tux922" = "b1848d60-4ddd-4fa4-a328-fb269910b6ae"; "pixelifytica" = "b1848d60-4ddd-4fa4-a328-fb269910b6ae";
"HomeInTheClouds" = "d49f0aee-f217-477b-9516-9d5906f7fc87"; "HomeInTheClouds" = "d49f0aee-f217-477b-9516-9d5906f7fc87";
}; };
serverProperties = { serverProperties = {
server-port = minecraft-port; server-port = 25565;
difficulty = "easy"; difficulty = "easy";
gamemode = "survival"; gamemode = "survival";
force-gamemode = true; force-gamemode = true;
@ -100,77 +23,9 @@ in {
# level-seed = 238902389203; # level-seed = 238902389203;
motd = "NixOS Minecraft server!"; motd = "NixOS Minecraft server!";
white-list = true; white-list = true;
enable-rcon = true;
"rcon.password" = rcon-password;
}; };
}; };
# don't start Minecraft on startup
systemd.services.minecraft-server = {
wantedBy = pkgs.lib.mkForce [];
};
# this waits for incoming connection on public-port
# and triggers listen-minecraft.service upon connection
systemd.sockets.listen-minecraft = {
enable = true;
wantedBy = ["sockets.target"];
requires = ["network.target"];
listenStreams = ["${toString public-port}"];
};
# this is triggered by a connection on TCP port public-port
# start hook-minecraft if not running yet and wait for it to return
# then, proxify the TCP connection to the real Minecraft port on localhost
systemd.services.listen-minecraft = {
path = with pkgs; [systemd];
enable = true;
requires = ["hook-minecraft.service" "listen-minecraft.socket"];
after = ["hook-minecraft.service" "listen-minecraft.socket"];
serviceConfig.ExecStart = "${pkgs.systemd.out}/lib/systemd/systemd-socket-proxyd 127.0.0.1:${toString minecraft-port}";
};
# this starts Minecraft is required
# and wait for it to be available over TCP
# to unlock listen-minecraft.service proxy
systemd.services.hook-minecraft = {
path = with pkgs; [systemd libressl busybox];
enable = true;
serviceConfig = {
ExecStartPost = "${wait-tcp.out}/bin/wait-tcp";
ExecStart = "${start-mc.out}/bin/start-mc";
};
};
# create a timer running every frequency-check-players
# that runs stop-minecraft.service script on a regular
# basis to check if the server needs to be stopped
systemd.timers.stop-minecraft = {
enable = true;
timerConfig = {
OnCalendar = "${frequency-check-players}";
Unit = "stop-minecraft.service";
};
wantedBy = ["timers.target"];
};
# run the script no-player-connected
# and if it returns true, stop the minecraft-server
# but also the timer and the hook-minecraft service
# to prepare a working state ready to resume the
# server again
systemd.services.stop-minecraft = {
enable = true;
serviceConfig.Type = "oneshot";
script = ''
if ${no-player-connected}/bin/no-player-connected
then
echo "stopping server"
systemctl stop minecraft-server.service hook-minecraft.service stop-minecraft.timer
fi
'';
};
# Caddy forwarding # Caddy forwarding
services.caddy.virtualHosts."craft.xenia.me.uk".extraConfig = "reverse_proxy http://localhost:25565"; services.caddy.virtualHosts."craft.xenia.me.uk".extraConfig = "reverse_proxy http://localhost:${toString config.services.minecraft-server.serverProperties.server-port}";
} }