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Migrating zabbix from mysql to timescaledb - database setup

Migrating zabbix from mysql to timescaledb - database setup

This part continues our mysql to timescaleDB migration. We prepare our target database and add some helpers on the source to create a resumable process.

Daniel Nachtrub
Daniel Nachtrub
Database
pfsense - CRL has expired in openvpn server

pfsense - CRL has expired in openvpn server

A few days ago we ran into an issue where pfsense appliances started to refuse openvpn connections by showing "CRL has expired" error messages. As it shows the reason is an overflow a date.

Daniel Nachtrub
Daniel Nachtrub
Linux
Service accounts in kubernetes 1.24

Service accounts in kubernetes 1.24

Kubernetes 1.24 changed the way serviceaccounttokens are presented by default on the cluster itself. If you need to retrieve the token, you mostly use a secret for this. This guide shows how to do this in kubernetes >= 1.24.

Daniel Nachtrub
Daniel Nachtrub
Container
Rocketchat fails after upgrade with index error

Rocketchat fails after upgrade with index error

Upgrading rocketchat to version 5.0 resulted in some minor issues that prevented the system from starting - both are related to the database and can easily be fixed.

Daniel Nachtrub
Daniel Nachtrub
Container
Replace tls cert using commandline (netsh)

Replace tls cert using commandline (netsh)

TLS endpoints on windows are often served by the operating system itself. Related certificate bindings can be managed using the command line easily. This guide shows how to replace a certificate using the commandline.

Daniel Nachtrub
Daniel Nachtrub
Windows
Forever growing zabbix database

Forever growing zabbix database

Starting with zabbix 6.0 some new featuers have been added - for example audit logging. This post shows downsides / limitations of audit logging on this release and how to avoid negative impact of this.

Daniel Nachtrub
Daniel Nachtrub
Database
Fixing a corrupt vhdx file manually

Fixing a corrupt vhdx file manually

Recently, I've had a corrupted VHDX file that has not been able to mount or repair using regular tools ("The file or directory is corrupted and unreadable"). This guide describes the steps that fixed it.

Daniel Nachtrub
Daniel Nachtrub
Windows
Patchday notes - VM stuck at boot (june 2022)

Patchday notes - VM stuck at boot (june 2022)

On june's patchday it might happen that windows based VMs do not start correctly. Be sure to plan your patchdays ahead and be ready to fix any issues right away.

Daniel Nachtrub
Daniel Nachtrub
Windows