Category: Devops
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 RAM to the swap space. Swap...
Read MoreUsing 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...
Read MoreDocker 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 we wanted the files created during...
Read MoreDocker 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...
Read MoreDocker 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 or it...
Read MoreHow 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 and connect to...
Read MoreAnsible: 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 ways to accomplish this using...
Read MoreCommon Docker image and container management commands
Introduction The docker command now consists of multiple management commands having related sub-commands embedded within them. Some of the examples of management commands are builder, config, container, image, network, etc. You...
Read MoreDocker Container life cycle explained
Introduction When we create a container the general philosophy is that the container comes up, does the task it’s intended to perform and then goes away. Containers are basically meant to be ephemeral in nature but we can...
Read MoreUsing dockerfile to build docker images
Introduction When we talked about the Docker hub we mentioned a scenario wherein we would use an Ubuntu 16.04 image as our base image, update it and install Python 3 on it. In our last post on Docker images we successfully...
Read MoreDocker images explained
Introduction When it comes to Docker, it’s difficult to talk about one concept without involving some part of another Docker concept. You are likely to notice this correlation in this post as well where we will talk about...
Read MoreAnsible install on RHEL 8 explained
Introduction Automating the administration of our servers has become more important than ever with the exponential growth of our server estate. Using Ansible for automation gives us security, reliability and the need for lesser...
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ABOUT ME..!
My name is Surendra Kumar Anne. I hail from Vijayawada which is cultural capital of south Indian state of Andhra Pradesh. I am a Linux evangelist who believes in Hard work, A down to earth person, Likes to share knowledge with others, Loves dogs, Likes photography. At present I work at Bank of America as Sr. Analyst Systems and Administration. You can contact me at surendra (@) linuxnix dot com.