Create persistent swap partition on Azure Linux VM
Introduction Swap space is storage on a disk device that is used when the system’s RAM (physcial memory) is full. When a Linux system runs out of RAM, inactive memory pages are moved from the…
Category: Devops
Using Ansible playbook to install Docker on Centos 7
Introduction Docker is a containerization engine and platform that encapsulates application code along with all of its dependencies inside a container. Containers are like virtual machines but they are more portable, more lightweight, and more…
Docker Volumes explained
Introduction In earlier posts, we created a script in our container and we were able to execute it. But when the container is removed the script will get removed right along with it. What if…
Docker networking commands explained
Introduction Our last article was a theoretical introduction to the Docker networking stack comprising the container network model and its components. In this article, we’ll be demonstrating some useful docker networking related commands including how…
Docker networking basics explained
Introduction In this post, we are going to delve in the theory and components of Docker networking. Generally, when we create a container, from the networking aspect it either needs to communicate with another container…
How to push an image to Docker hub
Introduction In our previous post, we explained some of the ways we could work with containers like running commands on containers during startup and also while they were running. We also explained how to start…
Ansible: insert a line after a string using lineinfile module
Introduction I recently came across a situation wherein I needed to search for a string/word in a file and then append some piece of text after the matched string. I’m sure that there are many…