Articles by Toni Schmidbauer
Stumbling into Azure Part II: Setting up a private ARO cluster
Toni Schmidbauer
In Part I of our blog post we covered setting up required resources in Azure. Now we are finally going to set up a private cluster. Private
As review from Part I here is our planned setup, this time including the ARO cluster.
Azure Setup
The diagram below depicts our planned setup:
On the right hand side can see the resources required for our lab:
- a virtual network (vnet 192.168.128.0/19). This vnet will be split into 3 separate subnets
- a master subnet (192.168.129.0/24) holding the ARO control plane nodes
- a node subnet (192.168.130.0/24) holding ARO worker nodes
- and finally a subnet call
GatewaySubnetwhere we are going to deploy our Azure VPN gateway (called avnet-gateway)The subnet where the Azure VPN gateway is located needs to have the name
GatewaySubnet. Otherwise creating the Azure VPN gateway will fail.Read More ...Stumbling into Azure Part I: Building a site-to-site VPN tunnel for testing
So we want to play with ARO (Azure Red Hat OpenShift) private clusters. A private cluster is not reachable from the internet (surprise) and is only reachable via a VPN tunnel from other networks.
This blog post describes how we created a site-to-site VPN between a Hetzner dedicated server running multiple VM's via libvirt and Azure.
An upcoming blog post is going to cover the setup of the private ARO cluster.
Read More ...Stumbling into Quay: Upgrading from 3.3 to 3.4 with the quay-operator
We had the task of answering various questions related to upgrading Red Hat Quay 3.3 to 3.4 and to 3.5 with the help of the quay-operator.
Thankfully (sic!) everything changed in regards to the Quay operator between Quay 3.3 and Quay 3.4.
So this is a brain dump of the things to consider.
Operator changes
With Quay 3.4 the operator was completely reworked and it basically changed from opinionated to very opinionated. The upgrade works quite well but you have to be aware about the following points:
Read More ...Ansible Tower and downloading collections
Every wondered why Ansible Tower does not start downloading required collections when you synchronize a project? Here are the stumbling blocks we discovered so far:
Read More ...Understanding RWO block device handling in OpenShift
In this blog post we would like to explore OpenShift / Kubernetes block device handling. We try to answer the following questions:
What happens if multiple pods try to access the same block device?
What happens if we scale a deployment using block devices to more than one replica?
Read More ...Basic usage of git
This is a very short and hopefully simple introduction on how to use Git when you would like to contribute to projects hosted on github.com. The same workflow should also work for projects on gitlab.com.
Read More ...Red Hat Satellite Cheat Sheet
Cheat sheet for various Red Hat Satellite tasks from a newbie to a newbie.
Read More ...Helpful oc / kubectl commands
This is a list of useful oc and/or kubectl commands so they won’t be forgotton. No this is not a joke…
Read More ...Copyright © 2020 - 2025 Toni Schmidbauer & Thomas Jungbauer