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Marco Lenzo

Oops... I nuked my cluster!

Oops... I nuked my cluster!

Unfortunately, it has been a very hectic week in a very busy year! I did the wrong decision to refresh my Kubernetes cluster during the weekend. Some unexpected issues coupled with me being extremely tired and I managed to nuke my entire cluster of machines included the backups. No idea

Continuous Delivery with GitLab and Kubernetes

Today I will just link an article I wrote for GitLab which received quite some positive feedback. It is a new approach I took for Continuous Delivery where I leverage the GitLab tools to create and manage my pipeline. I believe this is a superior and less costly approach to

CentOS Tutorials

Setup an Nginx Maintenance Page

Nginx grows in popularity day by day. Its solid performance and ease of setup make it a perfect tool to proxy traffic to your backend. In this article I will describe how you can configure a maintenance page that will be shown automatically every time you re-deploy or possibly your

CentOS Tutorials

Create a Kubernetes cluster on CentOS 7

Kubernetes is an open source system developed by Google which automates deployment, operations and scaling of containerized applications. It is a holistic solution for automated delivery offering a wide range of critical features like automatic binpacking, self-healing, auto-scaling, service registry, software load-balancing, automated rollouts, automated rollbacks, secret and configuration management,

Package a Spring Boot application into a Docker container

In this article, I will describe how we can easily package our Spring Boot Java Application into a Docker container using the docker-maven-plugin The reason why we favor containers in our Continuous Delivery (CD) prototyping is that they offer greater isolation than Virtual Machines (VMs). When the number of applications

CentOS Tutorials

Install UnrealIRCd Server on CentOS 7

In this article we will install UnrealIRCd on a CentOS 7 machine. UnrealIRC is the most popular IRC server. It is written in C and it is open source. User Setup and Download ## Add User adduser ircd ## Install required libraries yum install make gcc openssl openssl-devel ## Download and extract UnrealIRCd.

CentOS Tutorials

Install Jenkins on CentOS 7

Install Jenkins in few steps on CentOS 7. Java is a pre-requisite for your Jenkins installation. If you don’t have it, go ahead and install it. Note that Jenkins is incompatible with the GCJ version of Java. Best options are OpenJDK and the official one. # Install Java yum install

Continuous Integration with Git and Jenkins

Continuous Integration (CI) defines a software development process where the source code is pushed by developers to a central repository and verified by automated builds. Its main aim is to detect issues as early as possible and avoid integration hell. It is a fundamental practice in any software development team.

Microservices with Spring Boot

In this article, we will learn how to build a microservice in minutes with Spring Boot. The first step in our continuous delivery pipeline is the development phase. If we were allowed to start with a blank sheet, I would strongly suggest to consider a microservice architecture. Its core concept

Continuous Delivery Prototyping Step by Step

This is the first of a series of articles where we will embark on our journey to prototyping continuous delivery. The approach taken is going to be very practical. My assumption is that if you are reading this article you already know about continuous delivery and its benefits. This way