docs: create server

en/server.md

@@ -0,0 +1,50 @@
+---
+title: Server
+description: 
+published: true
+date: 2023-12-21T09:50:30.260Z
+tags: 
+editor: markdown
+dateCreated: 2023-12-21T09:50:30.260Z
+---
+
+# Details on the technology
+
+## Overview of servers used <a name="server" id="server"></a>
+
+| Purpose | Type | Processor | RAM | HDD | LAN | OS |
+| :- | :- | :- | :- | :- | :- | :- |
+| Current for all services | virtual root server (KVM) | AMD EPYC™ 7702 6x 3.35 GHz | 32 GB DDR4 | 800 GB SSD | 2.5 GBit/s | Ubuntu 20.04 | 
+
+Currently, one server is used for all services. This should be sufficient for our current needs and membership numbers, and the first upgrade will only be a move to a single, larger server. Technically, it would be better and more secure to run the individual services on different servers. At the moment, however, we have of course decided to keep the costs low so that we can set a low annual fee.
+
+## Overview of software used <a name="software" id="software"></a>
+
+In addition to the directly accessible [services](/en/services), other software is also used:
+
+* [nginx Webserver](https://nginx.org/) In addition to its direct function as a web server, nginx is primarily used as a proxy for almost all services so that they can only be accessed directly locally
+* [OpenSSH](https://www.openssh.com/) Administrative access
+* [PostgreSQL](https://www.postgresql.org/) SQL database for some services
+* [MariaDB](https://mariadb.org/) SQL database for some services
+* [Ufw](https://launchpad.net/ufw) Firewall
+* [Fail2ban](https://www.fail2ban.org) Bruteforce protection
+* [Docker](https://www.docker.com) Containerization for some services
+* [Redis](https://redis.io/) In-memory database for some services
+
+## F.A.Q. <a name="faq" id="faq"></a>
+
+### Why Ubuntu?
+
+Certainly a legitimate question. However, the reasons are less technical and more pragmatic. The handling of Debian-based systems is very familiar and Ubuntu offers a slightly better update policy than Debian stable. With an Ubuntu desktop, things can easily be tested at the same time, as the environments are largely identical.
+
+
+### Why two SQL databases
+
+Due to the fact that all services run on one server, *MariaDB* must be installed in addition to the preferred *PostgreSQL*, as some services unfortunately do not (yet?) support *PostgreSQL*.
+
+
+### ~~Why Apache Webserver and not nginx?~~
+
+~~Also simply due to lack of experience with *nginx* but relatively high expertise in dealing with *Apache*.~~
+
+Migrated to *nginx* in the meantime.