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Scaling applications - Rollout, Scale and Auto-Scale Deployments

This post is gonna be a bit bigger broader then what is requested on the EX280 exam objectives. In this post we will have a look at: Controlling roll-out of pods (manually rolling out or back a ...

ServiceAccounts and SCCs - Running pods with more permission's

In this blog we will take a look at SCC permissions that are needed to run a pod with escalated permissions and how to use a serviceaccount (sa) to run such a pod or deployment. Small thing: I use...

Creating and Using Secrets in OpenShift

Creating Secrets (like creating ConfigMaps) is a vital part of Managing OpenShift workloads and is an exam objectives of the EX280 exam. Knowing how they work and how to configure them (from the co...

Creating my EX280 page on Jekyll

As you might have notices I use Jekyll for this blog hosted on GitHub. I might do a post later on how I use it and how I set it up. For now, all you need to know is that Jekyll turns .md(markdown) ...

Taints and Tolerations - Can't Pods and Nodes just get along?

During my study for EX280 I found Taints and Tolerations very hard to understand. This is because Taints and Tolerations flip the scheduling of pods the other way around. What I mean by this is the...

ConfigMaps - Setting ConfigMaps from the oc CLI

While preparing for EX280 I learned a lot about using the CLI to configure Openshift resources. It’s always great learning to configure this stuff from the CLI because it gives you so much power an...

Installing vim-plug on macOS

vim-plug is a VIM plug-in manager to install themes and other plug-ins in VIM. It’s the most populair one at the moment. Installation To install vim-plug you can go over to https://github.com/june...

Let's get fuzzys

Fuzzy search is a great and easy way to find (back) stuff. You can use fzf on macOS and Linux to replace bash/zsh bck-i-search, make find obsolete and even get a quick way to preview files on the c...

Quick open Things3 with Alfred

In my daily workflow I have found that when using different tools and systems with each other removing friction can be key. This is not a original insight or even a leap of the imagination but I do...

Using netcat to replace telnet

Any longtime computer user might be familiarity with the (ab)use of the telnet command to check connections and open ports. It is certainly still the first program that pops in to my mind when I wa...