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Daniel Nachtrub

Daniel Nachtrub

Just some guy working with computers.

Change BIOSGUID in Hyper-V machines

Change BIOSGUID in Hyper-V machines

Using templated virtual machines on hyper-v comes with some issues if you need to ensure that each VM has a unique identity. This guide will show how you'll assign a unique identity for linux VMs.

Daniel Nachtrub
Daniel Nachtrub
Linux
docker swarm - preserve client ip on incoming connections

docker swarm - preserve client ip on incoming connections

Running services in docker swarm utilizes the docker swarm routing mesh which results in source nat (snat). If you need to bypass this, check out this guide.

Daniel Nachtrub
Daniel Nachtrub
Container
git on windows on CA's without crl (mostly pki)

git on windows on CA's without crl (mostly pki)

If you're working with git and are using certificates without revocation lists on windows this article shows how you can disable ssl revocation checks on git client.

Daniel Nachtrub
Daniel Nachtrub
Windows
Performance issue with hyper-threading

Performance issue with hyper-threading

On some of our setups we had an issue with VM to VM latencies (no the same host) ranging between 1000-2000ms. This article will describe the issue and how we solved it.

Daniel Nachtrub
Daniel Nachtrub
Windows
Migrating zabbix from mysql to timescaledb - introduction

Migrating zabbix from mysql to timescaledb - introduction

Depending on the size of your zabbix environment, you might want to migrate from mysql to timescaledb. This guide will show how this can be done.

Daniel Nachtrub
Daniel Nachtrub
Monitoring
Writing efficient zabbix templates - consolidate values

Writing efficient zabbix templates - consolidate values

Getting useful insights with your monitoring solution means you need to gather enough information that can be used to draw the right conclusions. This article will show how to retrieve vast amounts of data without overloading your monitoring system.

Daniel Nachtrub
Daniel Nachtrub
Monitoring
Reducing ceph filesystem overhead on virtual systems

Reducing ceph filesystem overhead on virtual systems

Running ceph clusters with cephfs may allocate more disk space than you expect - especially on virtualized environments. This guide might provide a solution for that.

Daniel Nachtrub
Daniel Nachtrub
Linux
Maintenance mode on elasticsearch clusters

Maintenance mode on elasticsearch clusters

Running elasticsearch means that you'll need to perform maintnance on the nodes from time to time. This guide will describe steps that should be done when performing maintenance operations on an elasticsearch cluster.

Daniel Nachtrub
Daniel Nachtrub
Powershell