数据库、nginx

mariadb: /etc/mysql/mariadb.conf.d/50-server.cnf
redis: /etc/redis/redis.conf
nginx: /etc/nginx/sites-enabled/default
redis设置密码：config set requirepass 123456

nginx返回ip

location /ipaddr{
    default_type application/json;
    return 200 "{\"IP\":\"$remote_addr\",\"Port\":$remote_port}";
}