kuvia/database/migrations/2021_02_09_172928_server.php

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class Server extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create("servers", function (Blueprint $table) {
            $table->id();
            $table->timestamps();
            $table->string("servername")->unique();
            $table->timestamp("last_seen")->nullable();
            $table->bigInteger("storage")->comment("In Byte, for cache");
            $table->bigInteger("userd")->comment("Userd Space in Byte")->nullable();

        });

        Schema::table("images", function (Blueprint $table) {
           $table->string("servername")->nullable();
           $table->foreign('servername')->references('servername')->on('servers');
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::dropIfExists("servers");
        /*Schema::table("images", function (Blueprint $table) {
           $table->dropConstrainedForeignId("servername");
           $table->dropColumn("servername");
        });*/
    }
}