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Upgrading ceph - migrating from docker hub

Upgrading ceph - migrating from docker hub

Many vendors are moving container registries away from docker hub. One of them is ceph. This means: Recent container images are no longer published via docker hub and will prevent you from upgrading using cephadm if your installation is still pointing to docker hub. Issue: failed to pull target imageTrying

Daniel Nachtrub
Daniel Nachtrub
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
Run c# inside powershell

Run c# inside powershell

Powershell is quite powerful already for most purposes. Yet there are times when you need to use features that are not available in powershell directly. An example would be interacting with the OS via DllImports (like Windows API). Luckily, powershell has the ability to compile c# inline using the Add-Type

Daniel Nachtrub
Daniel Nachtrub
Triggering elasticsearch ilm step manually

Triggering elasticsearch ilm step manually

Elasticsearch provides an index lifecycle management that will handle traversal of indices through a whole bunch of lifecycle steps. Sometimes you might want to give the ILM a small tap and move to a specific step manually. This guide will explain how this can be done.

Daniel Nachtrub
Daniel Nachtrub
Database
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
The one when compatible foreign keys are incompatible

The one when compatible foreign keys are incompatible

Upgrading our ghost blog ran into issues migrating the database schema. Foreign keys failed with "Referencing column and referenced column in foreign key constraint are incompatible.". Let's fix it.

Daniel Nachtrub
Daniel Nachtrub
Database
Migrating zabbix from mysql to timescaledb - setting up environment

Migrating zabbix from mysql to timescaledb - setting up environment

This series covers migrating a zabbix database from mysql to timescaledb. In this post we're preparing the databases for the migration.

Daniel Nachtrub
Daniel Nachtrub
Container
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