In our company, we currently run all internal services on dockers, for example, Gitlab, YouTrack, and Jenkins. It gives is high flexibility but also produces specific issues. Today I want to talk about one of them — docker inside docker. I assume that you already know Docker, Jenkins, and Ubuntu (or other Linux), because we use them as an example.
For our CI, we decided to use Jenkins. We use the dockerized version: https://hub.docker.com/r/jenkins/jenkins/. We build multiple different projects, which require different environments. Because of that, we choose to run all tasks in separate dockers. This way, we can have…
In the last article, which you can read here, we discussed two SOLID principles: the single responsibility principle and the open-closed principle. Today we’ll take a look at three other:
All of them will help you create a better, more readable object-oriented code. They are all about designing your code, dividing code into classes/interfaces, building abstractions. If you haven’t read the previous article I encourage you to do it first and then back here.
What are the SOLID principles? What SOLID stands for? SOLID is an acronym from five class design principles presented by Robert C. Martin in his paper “Design Principles and Design Patterns”:
All of them will help you create a better, more readable object-oriented code. They are all about designing your code, dividing code into classes/interfaces, building abstractions. Even if they were created with some specific thing in mind, they are universal and scalable. I want to present and explain them to you. …
Web developers, testers, and ops need to run scripts or check logs on a server. They probably use docker or another virtualization tool for the local environment. In some cases, the same settings and virtualization are used in the test and production environments.
If you have access to the host, you can easily connect to docker with one of the docker commands. Let’s assume that you used an image containing bash, and your container name is “app_container”. You can use:
docker exec -it app_container bash
If you use a docker-compose, the situation will be similar. Let’s say that your service…
If you work in web development, you probably use Docker as a virtualization tool. There is also a high probability that the same images your team use locally are used in stage or production. Probably your stage/production uses HTTPS communication. In that case, you need Docker with HTTPS. Let me show you how we do it for the LAMP stack. I’ll explain to you why we do it and how we do it.
Like many other companies, we use Docker for a dev environment. We use it also for tests and preview for clients. It gives us the possibility to…
We’ll discuss the general idea with a simple example. In our case, we have three buttons. Each button represents color. When a user clicks on a specific color…
There are a lot of hosting providers. If you need to host a single page application or static page (for example created with GatsbyJS or gridsome), you do not need anything fancy. You just need file storage with the possibility to set a custom domain. Also if you want to make your page public you should include SSL. Today we’ll check how to do it with AWS.
Let’s assume that we set up everything on AWS. We’ll deploy vue.js single page application. We’ll use a few services:
Many companies are adopting chatbots in context of client service and in-house support. Most of these solutions are connected with some messaging platform like Facebook Messanger, Whats App, Telegram, etc. At the same time, there are great voice assistants (like Alexa, Google assistant, etc.) used privately by non-company users. Not long ago, chatbots were just another interface for some application (mostly web apps), but now they are getting their own identity, humor, knowledge base, personality. They have become more like assistants, instead of question/answer interface, which collect and present data for your system. Voice interface is more natural to human…
Code’s comments are always overlooked subject. Many times developers add them chaotically, ignore or misuse them. Bad comments can be harmful, while good one can be a very useful tool. In this article I want to summarize most important things, which I discussed with other developers in our company. I also want to present my personal approach for commenting code.
You should use comments in few situations:
Web developer, tech advisor, manager, husband & father. CTO at VAO