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Linux

upgrade postgres with timescaledb

upgrade postgres with timescaledb

Upgrading postgres can be a challenging task, because databases are mostly in use. Having extensions like timescaledb introduces even more complexity. This guide shows a fast way to upgrade a postgres database with timescaledb.

Daniel Nachtrub
Daniel Nachtrub
Linux
freebsd 12.3 / pfsense 2.6 on hyper-v with low throughput

freebsd 12.3 / pfsense 2.6 on hyper-v with low throughput

Upgrading pfsense running on hyper-v to version 2.6 might result in a massive performance regression when the VMSwitch has RSC enabled.

Daniel Nachtrub
Daniel Nachtrub
Linux
Upgrading kernel on Ubuntu (20.04) LTS

Upgrading kernel on Ubuntu (20.04) LTS

Upgrading kernels on LTS releases of ubuntu can easily be done by enabling an LTS enablement stack. This guide will show how and what to consider.

Daniel Nachtrub
Daniel Nachtrub
Linux
pfsense - access ipmi using ipmitool

pfsense - access ipmi using ipmitool

Recent versions of pfsense ship with ipmitool. To use it you need to load the kernel module - this guide shows how to do this.

Daniel Nachtrub
Daniel Nachtrub
Linux
ceph reports "n hosts fail cephadm check"

ceph reports "n hosts fail cephadm check"

One of our ceph clusters entered HEALTH_WARN state with reason "1 hosts fail cephadm check". This guide shows a quick tip how to find out more about this issue.

Daniel Nachtrub
Daniel Nachtrub
Linux
sudo root shell with autocomplete

sudo root shell with autocomplete

Switching user using sudo results in a limited shell without command completion. Using the right sudo command omits this limit and provides a fully fledged shell.

Daniel Nachtrub
Daniel Nachtrub
Linux
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
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