[Tips] – How to troubleshooting/debugging a Kubernetes installation?

Following some commands and checks for you troubleshoot a Kubernetes installation. Checking the installation Check if you are able to … More

[Docker] – Using –build-arg to use safely confidential information to build docker images

In this post, we will do an example by using the flag –build-arg to build the image with a piece of … More

[Kubernetes] – How to create a Secret with base64 encode values? Is it safe to store confidential info?

The following example will show how to create a secret with base64 encode values. In this example, the values in … More

[Kubernetes] – Using port-forward to expose applications for debugging purposes

The command kubectl port-forwardallow us to expose a port. When it should be used?  It is the ideal solution for … More

Why is not safe to use confidential data in the containers environment variables?

Remember that containers are just a “process”. Then, it means that the values of the environment variables can be found … More

What are the most useful Kubernetes Resources for developers?

Following a diagram to check the most useful k8s resources for developers. Reference: https://www.oreilly.com/library/view/kubernetes-patterns/9781492050278/ch01.html Understanding the mainly Resources Following some … More

Understanding Kubernetes Components Architecture in one shot

Following am an image to illustrate the Kubernetes Components Architecture and help you with. NOTE: For a further understanding see Kubernetes … More

How to have kubectl auto-completion in MacOS X?

If you try to follow the steps in the k8s docs for a MaOS environment you will see that it will … More

How to getting started with Kubernetes?

From where do I start learning Kubernetes? How to learn Kubernetes? Following the steps that I’d like to recommend to … More

[Docker] – Understanding Docker Container Networking

Docker creates automatically 3 networks as follows. $ docker network ls NETWORK ID          NAME      … More