Category: Cloud

Cloud Modern Application

24 September 2021

Persistent Data & Resource Management

Persistent Data In previous articles, we have seen that if a POD is decommissioned or the container is restarted, all data present on the file system of the POD is deleted. It is a winning approach for all those stateless applications (for example a web […]

18 September 2021

Kubernets: Health-Check & Port-Forwarding

HEALTH-CHECK One of the features advanced and most important of Kubernetes is the health-check which allows you to control the integrity services. It is an additional layer that adds to the standard controls that guarantee that the application processes are always running ( livenessProbe ), […]

14 September 2021

Kubernetes: Pods

In previous articles, we have seen that containers are ” abstract ” places where applications run in the form of images. The PODs are the aggregation of more containers. A service it is the aggregation of more POD . The image of Figure 1 shows […]

4 September 2021

Kubernetes: The components

In previous articles, we have seen some details of how the architecture by Kubernetes. Today we will describe the working mechanisms of the Kubernetes engine indicating the name of each component; to stay true to the comparison of the car engine, we will talk about […]

29 August 2021

Kubernets: Knowing the details

A good way to describe cloud-native environments is to refer to the image of your car. The container is the engine, k8s is the electronic control unit that manages the proper functioning of the vehicle, the drivers, indicating the route and the destination, select the […]

4 August 2021

Modern Applications – Episod 4: Docker Compose – YAML

The topic of this article is understanding how to automatize the delivery of a micro-service. In the previous one, I showed the flow process of a service. This flow requires typing a lot of commands to launch any single container. Is there a way to automatize the […]

6 July 2021

Modern Applications – Episod 3: Service workflow

The first two articles explained what a container is (article 1) and how they can talk to each other (article 2). In this third article, I’m going to show how to deploy a service through this new and amazing container technology. Note 1: I won’t […]

24 May 2021

Modern Applications – Episod 2: Ports & Networking

As written in the last article a container can manage more images. Picture 1 shows an example of three different workloads running in a single container. Picture 1 It’s possible to work with different versions of the same image also. For example, MySQL has several […]

14 May 2021

Modern Applications – Episod 1: Foundamentals

Introduction This is the first of a group of articles about the technologies that can modernize the applications. The scope is helping the reader to understand the potentiality of this new way to make business allowing the Companies to be more competitive. These articles follow […]

3 January 2021

NUC upgrade to ESXi 7.0.1 – Part 2

Phase 2: Upgrading ESXi Host In the previous article, I described how to prepare a customized ISO. If you lost it please click on this link. Let’s continue! Requirements: the task I performed before starting the procedure here described has been the vCenter upgrade to […]

30 December 2020

NUC upgrade to ESXi 7.0.1- Part 1

Last weekend I upgraded all my Servers to the last VMware ESXi release (7.0.1 C) and this article is meant to describe all steps I performed. Just a recommendation before starting. I worked in my lab that it’s not a production environment. MyLAB before upgrade: […]

3 May 2020

Unifi USG – VLAN and Routing Configuration

INTRODUCTION: A virtual LAN (vLAN) is any broadcast domain that is partitioned and isolated in a computer network at the data link layer (OSI layer 2) (wikipedia) vLANs works by applying tags to network frames and handling these tags in networking systems. —— I love how USG has faced up the vLAN challenge. […]