Terraform map expansion - interface ranges Members Public

Expanding value ranges dynamically in terraform can help you to compact your configuration and keep the focus on the values. It takes a few moments to expand the values using regex magic, still it's worth the effort!

Daniel Nachtrub
Daniel Nachtrub
Cloud

Zabbix Server not running after upgrading to 7.4.0 Members Public

Upgrading a self-hosted Zabbix instance in Kubernetes sounds like a straightforward task, right? That’s what I thought - until I upgraded our Zabbix deployment to version 7.4.0 and was greeted by an all-too-familiar frontend error: “Zabbix server is not running” This post walks through the upgrade process,

Lorenz Maier
Lorenz Maier
Monitoring

k8s resource limits and their edge cases Members Public

In a kubernetes podspec, ressource limts can be quite suprising...

Felix Zimmermann
Kubernetes

Cannot access more than a few virtual functions using SRIOV Members Public

SRIOV is a powerful technology with it's own challenges. Sometimes simple things are the solutions. Still you can always learn a little more about how it works behind the curtain!

Daniel Nachtrub
Daniel Nachtrub
Linux

InvalidHeaderValue on python & azure storage account access Members Public

Using python to access azure storage accounts can - during rollouts of new api versions - result in InvalidHeaderValue issues if the client library is requesting an api version that is not yet on the account.

Daniel Nachtrub
Daniel Nachtrub
Azure

ingress-nginx 1.12 & allow-snippet-annotations Members Public

If you need to use snippet annotations (why?) on ingress-nginx - you'll also need to adjust the annotation filtering.

Daniel Nachtrub
Daniel Nachtrub
Azure

multus - deadlock state on thick plugin Members Public

Using Multus CNI's 'thick plugin' in Kubernetes can cause pod startup deadlocks due to circular dependencies between pods and the Multus daemon. Switching to the daemonless 'thin plugin' mode effectively resolves this initialization issue.

Daniel Nachtrub
Daniel Nachtrub
Cloud

kubernetes, cgroups v2 and failing health probes Members Public

Running Kubernetes on a systemd-based OS can lead to pods restarting endlessly due to health probe failures, caused by the systemd cgroup driver. Previously, this was fixed by modifying boot options, but a simpler approach is to switch the kubelet to use cgroupfs instead.

Daniel Nachtrub
Daniel Nachtrub
Cloud