[Docker] – Understanding Docker Container Networking

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

[Docker] – Understanding Docker Images

They are nothing more than a text file called Dockerfile with the instructions which are required to build a container. Then, … More

Understanding containers in 15 minutes

We will use here the Docker containers as an example. However, beware that it is NOT the only existent solution … More

Getting started with Golang Operators by using Operator SDK

I’d like to share the post blog written in the RedHat developer blogs over this subject. It is great for … More

[MacOsX] – How to install Prometheus, Grafana, and AlertManager in Minikube?

Pre-requirements: Have the Minikube installed and working already. See the post How to install Minikube with UI in the MacOsX? … More

[Solved] – Unable to install Minishift with the latest version of docker-machine-driver-xhyve

If you are doing the following steps: Following the Minishift doc to install Minishift with this drive Then, running brew install docker-machine-driver-xhyve Then, … More

PostgreSQL Operator released by Dev4Devs

The PostgreSQL Operator is now available in the https://operatorhub.io and in a good state for you. Note that it was NOT just … More

Using OperatorHub.io catalogue locally with Minikube

The goal of this post is to be a quick start for you install in your Minikube and/or Kubernetes cluster … More

How to install Minikube with UI in the MacOsX?

You may face issues when you try to follow up the official documentation because by default it will try o use VirtualBox then … More

[Ansible] – How to create an Ubi/rhel7 image with ansible and python3?

Following an example over how to install ansible with python3 in a centos/rhel7 docker image. FROM registry.access.redhat.com/ubi7/ubi … RUN mkdir … More