Kubernetes Kubernetes Architecture Overview for DevOps Enthusiasts We start with a basic overview of the Kubernetes cluster architecture. We first look at the architecture at a high level, and then we drill down into each of these components. We see what their roles and responsibilities are and how they are configured. And finally, you go through a
Kubernetes Kubernetes Features Every Beginner Must Know Kubernetes being the buzz around has made enormous noise in the recent few years because of out of the box features it provides to the companies. It has become a de-facto tool for container deployments on the cloud for the firms around the globe; it has opened up a whole
Kubernetes Getting Started with Kubernetes: A Beginners Guide Companies have started embracing the containerized approach. While they all used to have a massive monolithic architecture with thousands of lines of code that grew into a humongous, slow-moving, hard to manage thing, and this is where the problems started. The DevOps experts, developers, and architects are now coming to
Docker certification The Ultimate Docker Certification (DCA) Guide for 2022 Why Get a Docker Certification? With a rising pattern of organizations adopting Cloud services, Docker continues to gain popularity. At its core, Docker aids in containerization, that is, for the packaging of applications into modules that can easily be replicated and scaled independently. Unarguably, as more applications are moving to
Kubernetes Tips and Tricks to Pass the CKA and CKAD Exam If you do a quick search online, you would quickly notice that a lot of people are claiming that they have taken and passed the CKA and CKAD examinations. In case you are wondering, the CKAD is the Certified Kubernetes Application Developer exam, while the CKA is the Certified Kubernetes
DevOps Roadmap to Become a DevOps Engineer DevOps Engineer has become an emotion and not just a job profile. People from all sorts of professions are willing to get their hands dirty and make a shift to this career as a DevOps engineer. Apart from the buzzword bingo, DevOps holds a unique position in the software field,
Docker Role of Docker in DevOps A developer builds an application and sends it to the tester. But, the environments of development and testing systems are different; thus, the code does not work. There are two solutions to this: Docker and Virtual Machines, but Docker is far better in terms of performance, scaling, and efficiency. In
Linux Linux - Boot or Change System into Different Operating Modes In this blog, we will see how to boot or change system into different operating modes in Linux. Changing the Default Boot Target When the operating system boots up, it takes a look at what the default systemd target is. We can check for ourselves what target is currently set
Linux Linux - Boot, Reboot, and Shutdown a System Safely In this blog we will see how to boot, reboot, and shutdown a system safely in linux. Reboot and Shutdown To reboot or shutdown a Linux machine we’ll often use the systemctl (system control) command. Some commands require system administrator privileges. The root user has such privileges. So we
Linux Linux - Create and Manage Soft Links In this blog, we will look into how to create and manage soft links in Linux. Soft Links (also called Symbolic Link) Know how when you install a program on Windows, you might get a shortcut on your desktop? You double click on that shortcut and that application gets launched.
Linux Linux - Create and Manage Hard Links In this blog, we can see how to create and manage hard links in Linux. To understand hard links and soft links we first have to learn some very basic things about filesystems. Let’s imagine a Linux computer is shared by two users: alex and jane. Alex logs in
Linux Linux - Create, Delete, Copy, and Move Files and Directories In this blog, we will see how to create, delete, copy and move files and directories in Linux. Filesystem Tree Linux organizes files and directories in what it calls the filesystem tree. Why is it called this way? Because just like a tree we’d see in nature, this also
Linux Linux - Read, and Use System Documentation In this blog, we will see how to read, and use system documentation in Linux. There will be many commands we will use in Linux. And each command has a lot of command-line switches. For example, let’s look at the ls command that lets us see what files and
Linux Linux - Local & Remote Graphical and Text Mode Console In this blog, we will see how to log into local console & remote graphical and text mode consoles in Linux. We’re all used to logging in to apps or websites by providing a username and password. Logging into a Linux system is pretty much the same, so there’s
Helm Helm Best Practices and Recommendations In this blog, we will see what are Helm’s best practices and recommendations. As we develop our charts, we’ll notice we have multiple solutions to most problems. When we can solve something in, say, 8 different ways, as beginners, it may be hard to know which path would
Helm Helm Plugins In this blog, we will see what are Helm plugins. As we saw, our Helm tool can do many things. But just in case there’s something extra we’d find useful, Helm is extensible. We can add more features, on top of its core functionality, by installing plugins. You
Helm Uploading a Helm Chart In this blog, we will see how Uploading a Helm chart can be done. Once we’ve packaged our chart and signed it, it’s time to upload all of our hard work online, so that our users can easily install it with a simple command like helm install my-release
DevOps Package, Sign, and Verify Charts In this blog, we can see how we can Package, Sign and Verify Helm charts. After we finish building a chart, the next step is to start distributing it to our users or our organization. This is usually a 2 or 3-stage process: 1. Package 2. Sign (Optional but significant
Helm Helm Chart Dependencies In this blog, we will see about Helm Chart Dependencies or simply how a chart may depend on other charts. For example, if we would build a chart that could launch a WordPress website, this would also depend on a chart for MySQL or MariaDB, and, possibly, also Memcached if
Helm Chart Tests In this blog, we will see what is Chart Tests. Not all Kubernetes clusters are the same. A chart that works in one cluster may fail to install correctly in another. Maybe a necessary feature is lacking. Maybe there are not enough resources. Or maybe some Kubernetes objects that our
Helm Chart Hooks In this blog, we will see what is Chart Hooks. Imagine we have a Helm chart for WordPress installed. Our WordPress website would use the Apache web server and the MySQL or MariaDB database server behind the scenes, plus the WordPress files themselves, that hold the code for our website.
Helm NOTES.txt File, Post-Install Upgrade Instructions for Helm Chart Users In this blog, we will look at what is NOTES.txt file in a Helm chart. Some Helm charts can get pretty complex, installing and interconnecting a lot of objects in your Kubernetes cluster. As such, it can be pretty confusing for users how they should continue after installing a
Helm Helper Files and Named Templates In this blog, we will see what are Helper Files and Named Templates in Helm. Let’s say we want more complex labeling than what we currently have, a simple app: nginx label. Let’s say we want our labels to look like this: apiVersion: apps/v1 kind: Deployment metadata:
Kubernetes Helm Flow Control and Conditionals In this blog, we will see what is Flow control in Helm. Flow Control controls the flow of text generated. The flow of text can go in one direction or another direction, instead of the same content being generated every time. In a way, it’s like we can almost
Helm Helm Template Functions and Pipelines In this blog, we will look at what is Template Functions and Pipelines in Helm. In the chart we’ve built so far, we’ve assigned proper values to every customizable setting we listed in values.yaml and referenced in deployment.yaml. So for a line like image: "{{ .Values.image.
