What is Docker Compose As seen in my previous article, we can configure docker based LAMP stack using Docker images. Another way to do it is to use Docker Compose. This tool can be used to define and run multi-container applications easily. Indeed, through a YAML file (docker-compose.yml) we will store all the configurational information needed …
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Today, let’s see how to configure a Docker environment on your Windows 10 Computer. Docker Desktop requirements If you are running an old version of Windows, you can use Docker ToolBox instead. Download Docker Desktop First thing to do is to download Docker Desktop and follow the instructions ! Start Docker Desktop for Windows Docker does not start automatically …
Let’s start a new serie of articles on Docker for beginners ! In this one, we will see what is Docker before having fun with it. What are Containers ? We can’t explain Docker if we don’t explain containers. Containers are designed to benefit for both developers and system administrators. Indeed, developers need to focus …
In the previous post we have seen together how to create Docker Images and run basic commands on containers. Now, let’s see how we can configure a Basic Web Application. Basic Static Site To begin with, we will just run a container that will display a static page. First, we need to pull a docker …
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What is a Docker image A Docker image is a file, comprised of multiple layers, used to execute code in a Docker container. An image is essentially built from the instructions for a complete and executable version of an application, which relies on the host OS kernel. When the Docker user runs an image, it becomes one or …
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Introduction By definition, a Distributed system is not a Centralized system where state is stored on a single computer. Centralized Systems are simpler, easy to understand and can be faster for a single user. Distributed Systems state is divided over multiple computers. It is more robust, scalable but also more complex. Examples of Distributed Systems : Distributed Systems Advantages The main advantage …
Introduction Splunk and ELK Stack (Elasticsearch, Logstash, and Kibana) are the “big 2” log analytic engines on the market. They have a lot in common and it’s pretty tricky to find which one suits your needs. They capture, index, and correlate real-time data in a searchable repository from which it can generate graphs, reports, alerts, dashboards, and …
Introduction As you may have seen in my previous article how to use Ansible (https://www.linkedin.com/pulse/configuration-automation-ansible-beginners-lionel-gurret/), we can use many modules to configure and developp our playbooks. Here are in my opinion the 10 most useful Ansible modules you should know (on Linux environments) ! The Ping Module The first thing you probably want to do …
Introduction Recursion is a way of solving a problem by having a function calls itself. In this article we will use factorials as an example with Python. Factorials Do you remember what are factorials ? Pretty easy : n! = n * (n-1) * (n-2) * (n-3) * (n-4) * …. * 3 * 2 …
Introduction A hashing algorithm’s goal is to generate a value computed from a base input number using a hashing function which are one way functions. It’s generally a cryptographic function that maps data of arbitrary size to a hash of a fixed size. The ideal hash function should respect the following points : As you …