Tutorials

Create CoreOS Container Linux Ignition File

With all recent changes within CoreOS’s Container Linux distribution one of the most notable change is related to the Ignition file, basically this file handles the configuration for any Container Linux installation and we can say that it is pretty powerful. The concept behind this is somehow simple but as we have already said, quite powerful, allowing the users to configure the operating system right from the start with all basic and advanced settings needed. In this short tutorial we will cover the basics of how to create a simple .yaml CoreOS Container Linux ignition config file and how to […]

Category: General | Published: 10/01/2020 | Updated: 10/01/2020

Setup a Private Docker Registry

Setting up a private Docker registry locally for our organisation or maybe for personal use can be seen as a must if we don’t want to expose publicly our custom Docker images. It is true that we can easily get a private repository if we would go for a paid subscription to one of the providers available out there on the market that are offering such services, but why doing so when we can simply do it by ourselves, internally, completely isolated and being under our control. Having a private Docker repository / registry will give us the ability to […]

Category: Docker | Published: 20/12/2019 | Updated: 31/12/2019

Change Kubernetes Pods CIDR

Changing Kubernetes Pods CIDR (Classless Inter-Domain Routing) is our next tutorial where we will learn in just a few easy steps how to change the network mask / range for our Kubernetes environment. Kubernetes is considered one of the most mature and stable platform for Docker orchestration – at the time of writing this tutorial -, being used in production environments by many big names from the tech industry. Mastering Kubernetes is not an easy task, it really takes time and require a lot of practice, it is well known of having a not so easy learning curve. Here, in […]

Category: Kubernetes | Published: 19/12/2019 | Updated: 22/12/2019

Create custom Docker image

Create custom Docker image is our next short tutorial where we will be showing you in just a few easy steps the basics of how to create a simple custom Docker image from the scratch, how to build it and also how to push this image to your own Docker repository. If you are a beginner then this is the right tutorial where you will learn one of the basic tasks when working with Docker, build your own custom images for your own web applications or websites. Table of contents Context Create Dockerfile Custom Docker image content Build custom Docker […]

Category: Docker | Published: 11/12/2019 | Updated: 15/12/2019

CoreOS Static IP Address

CoreOS static IP address configuration it is quite straight forward even though when we build a CoreOS cluster, DHCP should always be the standard setup. CoreOS has been cleverly designed to discover all new nodes that are joining in the same the network – with some extra configuration – but, in some cases, for various reasons, DHCP may not be an option and that is why in this short tutorial we will be showing you how to set up a static IP address on CoreOS by using a basic example. The solution for setting up a static IP is not […]

Category: General | Published: 05/12/2019 | Updated: 06/12/2019

AWS Switch Role Setup

AWS Switch Role Setup is our next tutorial where we will explain how to setup IAM Policies and IAM Roles in order to switch between multiple AWS accounts without using various credentials for each individual account. Setting up Role Switching within AWS may seem difficult or maybe confusing but in reality this is quite simple and easy to implement. Such a solution will definitely ease your user management tasks and in the same time will give you the flexibility to manage users access in a more granular fashion. For this specific tutorial, which will be a very short one, we […]

Category: AWS | Published: 15/10/2019 | Updated: 15/10/2019