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Micro server

Goal of this site is to build little server farms that manage the whole network of a company. We will do this instead of install all services on big servers and separate them with VMs.

Experimental

This project is experimental and we are not recommend to install this environment in a productive company.

Real Life situation

In the last few years I did recognize that if you use such an experimental environment for productive use, that there can suddenly arise problems you may not even thought about to exist. A lot of work days completely changed in this time. Only because of kernel problems or hardware overheating that occur because of messy software implementation and other things.

Live Ticker

So I decided to inform you about these problems. Start 0318

Configurations

This is a more helpful area for you. Here you can find configurations for services that you can also install on bigger servers. To name a few:

  • icinga2
  • DHCP
  • DNS
  • SAMBA as domain controller
  • ...

Live Ticker

18.04.04 - 20:54

A few days after the upgrade to Kopano a lot of problems does exist. But there are also a few cool changes like the audit.log I'll use this in the next fail2ban tutorial.

18.03.27 - 07:11

The webserver that we want to relocate on Friday had a problem today. Icinga recognizes ping problems to that location and a customer told me that he has problems with the service. The SSH connection to the server needed 2 minutes to connect. After restarting the firewall anything worked correctly again. Only the firewall had a 'read-only' filesystem. I see this problem very often and I too think that this is a kernel related problem that produces this error on the SD card or emmc on a SBC. Ok I repaired the running system with

e2fsck -t -y /dev/mmcblk0p2

and after a reboot I had to remount the filesystem

mount -o remount,rw /

So I'll get further into this and try to resolve the problem that it'll doesn't occur in the future.

18.03.22 - 11:45

An icinga instance makes me crazy the whole time. It has a problem to ping some servers. The servers are behind a VPN and if I test them, they are always ok. So I believe that this has something to do with the strongswan gateway that runs on a bpi-m3.

The Debian system on the bpi-m3 froze a few times in the past. So maybe it's time to use a different operating system for the banana pi. SinoVoip released a few Ubuntu images in January this year. These images are not categorized in a directory. So it looks like if this are the stable images for the bananas.

RT|server farm