67 lines
1.9 KiB
Nix
67 lines
1.9 KiB
Nix
{ config, pkgs, ... }:
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let
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mcDataDir = "/srv/minecraft/data";
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b2Bucket = "compsigh-server-backups";
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in
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{
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systemd.services.minecraft-backup = {
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description = "Backup Minecraft world to Backblaze B2";
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after = [ "docker-minecraft.service" ];
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path = [ pkgs.docker ];
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serviceConfig = {
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Type = "oneshot";
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ExecStart = pkgs.writeShellScript "minecraft-backup" ''
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set -euo pipefail
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TEMP_BACKUP="/tmp/minecraft-world-latest.tar.gz"
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# Check if the container is running
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if ! docker ps --format '{{.Names}}' | grep -q '^minecraft$'; then
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echo "Minecraft container not running, skipping backup"
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exit 0
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fi
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# Flush all chunks to disk and pause saving
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docker exec minecraft rcon-cli save-all flush
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sleep 2
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docker exec minecraft rcon-cli save-off
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# Compress world data (re-enable saving even if tar fails)
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if ! ${pkgs.gnutar}/bin/tar czf "$TEMP_BACKUP" \
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-C ${mcDataDir} world; then
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echo "tar failed, re-enabling saving"
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docker exec minecraft rcon-cli save-on
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exit 1
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fi
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# Re-enable saving immediately
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docker exec minecraft rcon-cli save-on
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# Upload to B2 (overwrites the single backup file)
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B2_ACCOUNT=$(cat ${config.age.secrets.b2-account-id.path})
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B2_KEY=$(cat ${config.age.secrets.b2-application-key.path})
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${pkgs.rclone}/bin/rclone copyto \
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"$TEMP_BACKUP" \
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":b2:${b2Bucket}/world-latest.tar.gz" \
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--b2-account "$B2_ACCOUNT" \
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--b2-key "$B2_KEY" \
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--no-check-dest
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# Clean up local temp file
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rm -f "$TEMP_BACKUP"
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echo "Backup uploaded to Backblaze B2 successfully"
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'';
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};
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};
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systemd.timers.minecraft-backup = {
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wantedBy = [ "timers.target" ];
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timerConfig = {
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OnCalendar = "*:00/10";
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Persistent = true;
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};
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};
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}
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