Operations | Monitoring | ITSM | DevOps | Cloud

Today, most organizations, large or small, are hosting their SaaS application on the cloud using multi-tenant architecture. There are multiple reasons for this, but the most simple and straightforward reasons are cost and scalability. In a multi-tenant architecture, one instance of a software application is shared by multiple tenants (clients).

While developing Docker images for Icinga 2, Icinga Web 2 and Icinga DB we stumbled over OpenShift which doesn’t allow images to run as root by default. One has to enable that explicitly. Also admins of K8s environments being more permissive by default may decide not to allow running as the superuser. So we’ve added a USER directive to our Dockerfiles to make our customers‘ compliance departments happy.

The most common problems and outages in a Kubernetes cluster come from coreDNS, so learning how to monitor coreDNS is crucial. Imagine that your frontend application suddenly goes down. After some time investigating, you discover it’s not resolving the backend endpoint because the DNS keeps returning 500 error codes. The sooner you can get to this conclusion, the faster you can recover your application.

In this post, we will outline a reference architecture for setting up K3s in a High Availability (HA) configuration. This means that your K3s cluster can tolerate a failure and remain up and running and serving traffic to your users. Your applications should also be built and configured for high availability, but that is beyond the scope of this tutorial. K3s is a lightweight certified Kubernetes distribution developed at Rancher Labs that built is for IoT and edge computing.

According to leading independent researchers teknowlogy | PAC, open source platforms – and Kubernetes in particular – are central to the future of digital factories. The PAC RADAR report offers a detailed market analysis of industrial digitalisation trends, and it predicts that Kubernetes-based platforms that bring together edge and cloud technologies will soon dominate the digital factory landscape.

Today, every company is a software company and digital business is a core strategy for many organizations. To gain the much-needed agility and efficient scalability, companies in all verticals are modernizing their infrastructure by moving to hybrid, multicloud and cloud-native environments. Realizing that modern applications run on modern infrastructure, IT leaders are prioritizing infrastructure modernization initiatives.