Kubernetes for mere mortals
There have been few technologies that have changed the landscape of business and impacted all our daily lives. Of course, the internet is the technology that...
articles
A recipe for a bespoke on-prem Kubernetes cluster
So you want to build yourself a Kubernetes cluster? You have your reasons. Some may want to utilize the hardware they own, some may not fully trust these fan...
Which Kubernetes distribution to choose for on-prem environments?
Most people think that Kubernetes was designed to bring more features and more abstraction layers to cloud environments. Well, I think the biggest benefits c...
How to modify containers without rebuilding their image
Containers are a beautiful piece of technology that ease the development of modern applications and also the maintenance of modern environments. One thing t...
The challenges of multi-cloud environments
When this all IT revolution began, we started with one computer that was the size of a room, then we invented server rooms, we started dividing servers into ...
4 ways to manage Kubernetes resources
Kubectl is the new ssh When I started my adventure with linux systems the first tool I had to get to know was ssh. Oh man, what a wonderful and powerful pie...
Why Vault and Kubernetes is the perfect couple
The (not so) secret flaws of Kubernetes Secrets When you’re starting learning and using Kubernetes for the first time you discover that there is this specia...
How to build CI/CD pipelines on Kubernetes
Kubernetes as a standard development platform We started with single, often powerful, machines that hosted many applications. Soon after came virtualization...
10 most important differences between OpenShift and Kubernetes
UPDATED on 10.6.2019 (after the release of OpenShift 4.1): Added information on OpenShift 4. UPDATED on 30.8.2019: Added information on CodeReady Containers...
Jenkins on OpenShift - how to use and customize it in a cloud-native way
I can’t imagine deployment process of any modern application that wouldn’t be orchestrated by some kind of pipeline. It’s also the reason why I got into cont...
Maintaining big Kubernetes environments with factories
People are fascinated by containers, Kubernetes and cloud native approach for different reasons. It could be enhanced security, real portability, greater ext...
Honest review of OpenShift 4
We waited over 7 months for OpenShift Container Platform 4 release. We even got version 4.1 directly because Red Hat decided not to release version 4.0. And ...
How to increase container security with proper images
Security is a major factor when it comes to a decision of whether to invest your precious time and resources in new technology. It’s no different for contain...
Why GKE is probably the best Kubernetes service available
So you’ve heard of Kubernetes already and maybe you also tried to deploy it on your on-prem infrastructure or in the cloud. And although deploying an app on ...
Three levels of highly available apps on Kubernetes
Beautiful but useless systems Hundreds of applications, thousands of users and millions of requests - that is often a landscape of modern IT environment. St...
Containers done right - providing configuration
Containers are ephemeral, but almost always require configuration and credentials. They are kept and maintained seperately from application code. This princi...
Shamans in organizations - who are they and why are they dangerous
Imagine for a while that your organization is like a village where there are regular residents and shamans who keep most of the knowledge for themselves. Thi...
Why managing container images on OpenShift is better than on Kubernetes
So you’ve decided to go with Kubernetes and started building your container images. Now the question is where to push them and how to manage them properly?
Things I like and dislike about Azure
So yes - I’ve started using Azure. And no - this is not the same as AWS. And here’s why.
Treat your pods according to their needs - three QoS classes in Kubernetes
One of the features that comes with Kubernetes is its ability to scale horizontally services running on it and use available resources more efficiently. I’ve...
Myths around containers. Part 3: Speed
Containers are considerably faster than virtual machines - at least that’s what most people say. But do they actually bring more speed to overall development...
Myths around containers. Part 2: Portability
Is it true that after so many years we finally have real, portable format for all applications? It seems that we’ve come very close to that goal and it’s tim...
Myths around containers. Part 1: Security
We had many revolutions in IT infrastructure world over past 20 years or so. Virtualization promised hardware abstraction, private cloud promised lower costs...
10 reasons why Kubernetes has won
We’ve been falling for the containers hype for the past few months and Kubernetes has emerged as a leader among container orchestrator to help build solution...
What I’ve learned from using Linux for over 15 years
My first Linux distribution was Red Hat 7.2 (not Red Hat Enterprise Linux which is a different product) released in 2001.
IT certifiations demystified
Recently I counted my certificates and I was shocked to find out that I own 21 various types of them. I decided it’s time to sit and write down all the thing...
Simple way of determining subnet type for ec2 instance
Amazon AWS has awesome service VPC which allows you to create virtual networks with complex configurations. VPC is a crucial part of your cloud infrastructur...
My little research on official Docker images
I published results of my little project in which I was making research on official Docker images. The results are quite interesting. You can read about it h...
Don’t believe in tools
We live nowadays in a world of abundance. We have plenty of opportunities, almost unlimited possibilities and myriad of tools to help you do your job. In IT ...
Top 5 reasons why so many administrators don’t use automation
With a rapid development of software delivery and applying it to different areas of our lives, needs of automation has become crucial. Emerge of DevOps movem...
Real hackers don’t need documentation
My first computer was a Commodore 64. It was somewhen in the early ’90s and I was using it mainly for one purpose - games. They were available either on spec...
How to control million containers
Recently guys from hashicorp (guys who have created Vagrant) presented results from a test that was meant to check their Nomad scheduler would manage to star...
Welcome
Hello world! This is not the first time that I’m starting with writing, but I hope this time I’ll be more persistent and deliver interesting articles.