devops

Pulling is not possible because you have unmerged files

The error message "Pulling is not possible because you have unmerged files" is a response from Git when you attempt to execute a git pull operation while

Steve Alila6 min read
devops

Securing the Gateways to Your Digital Realm

In the bustling metropolis that is the cloud, our first line of defence against digital wrongdoers is what's known as the Identity provider, or IdP for short.

Deepak Prasad6 min read
devops

DevSecOps Best Practices for 2024

DevSecOps is like adding a security guard to the team that builds and maintains software. In the old way of doing things, this security guard would only check

Deepak Prasad4 min read
devops

How to Mitigate the Dangers in Cloud Hosting Online Safety

In this fierce era of competition, cloud computing is no longer just an option for businesses. It has occupied the business world lately. Whether it is a

Deepak Prasad6 min read
devops

The imperative of attack simulation in modern cybersecurity

Imagine locking every door and window in your house, only to realize there's a hidden passage you've overlooked that's what it's like without the vital

Deepak Prasad6 min read
devops

Setup KVM HA Cluster | Pacemaker GUI | RHEL/CentOS 8

Step-by-Step Tutorial to configure KVM HA Cluster using Pacemaker GUI (WEB UI) and CLI tool in RHEL and CentOS 8 Linux. Configure Virtual Floating IP, verify failover

Deepak Prasad15 min read
devops

Essential and Useful docker logs command Tips Revealed

docker logs -f or --follow is used to monitor the logs of container with dynamic update. docker logs --tail is used to additionally limit the number of lines to view from the logs.

Deepak Prasad7 min read
devops

Detailed overview on Kubernetes API Server

In Kubernetes, all communications and operations between the control plane components and external clients, such as kubectl, are translated into RESTful API calls that are handled by the API server

Deepak Prasad12 min read
devops

Kubernetes Authentication & Authorization (Workflow)

Kubernetes Authentication and authorization play a very vital role in securing applications. These two terms are often used interchangeably but are very

Deepak Prasad7 min read
devops

Beginners guide on Kubernetes Pods with examples

Kubernetes Pods are the smallest deployable units of computing that you can create and manage in Kubernetes. It is a co-located group of containers and represents the basic building block in Kubernetes.

Deepak Prasad15 min read
devops

How to configure or build ceph storage cluster in Openstack ( CentOS 7 )

Step by step guide to build ceph storage cluster in Openstack CentOS 7 Linux on virtual machine. Confiure OSD, mon using ceph-deploy tool for ceph cluster

Deepak Prasad12 min read
devops

8 Common Mistakes First-Time Linux Users Make

So you've finally made the switch to Linux? Congratulations! It's like entering a new world of possibilities.

Deepak Prasad6 min read
devops

Kubernetes Privileged Pod Practical Examples

Step by Step instructions to create Kubernetes privileged pod and Kubernetes non-privileged pod with Linux capabilities examples

Deepak Prasad14 min read
devops

Easy steps to install multi-node Kubernetes Cluster CentOS 8

Install multi-node Kubernetes cluster using kubeadm on CentOS 8 Linux. Learn deployment architecture, with Docker CE runtime and weave networking add-on plugin

Deepak Prasad24 min read
devops

Easy steps to add node to existing cluster in Kubernetes

Install all the Kubernetes components i.e. kubeadm, kubectl, kubelet. Use kubeadm join command to add node to existing cluster in Kubernetes.

Deepak Prasad9 min read
devops

Steps to install Kubernetes Cluster with minikube

Deploy single node Kubernetes Cluster using minikube using Oracle VirtualBox on Windows environment. The cluster node will be on Ubuntu Linux.

Deepak Prasad7 min read
devops

Configure High Availability Cluster in CentOS 7 (Step by Step Guide)

Step by Step guide to configure high availability cluster in CentOS or Red Hat 7 using pacemaker and corosync, 3 node HA Cluster on Virtual Box or KVMs..

Deepak Prasad8 min read
devops

Helm hooks examples in Kubernetes for beginners

Helm hooks provides a means to hook into events in the release process and take action. Hooks like pre-install can be used to pass configmaps and secrets to the pods and Jobs

Deepak Prasad14 min read
devops

How to perform Kubernetes RollingUpdate with examples

Kubernetes RollingUpdate is used with deployments to perform updates time zero downtime by incrementally updating Pods instances with new ones.

Deepak Prasad14 min read
devops

#2-ELK Stack: Enable https with ssl/tls & secure elasticsearch cluster

Steps to enable HTTPS and SSL to secure elasticsearch cluster and ELK Stack using encrypted key and certificates in Linux with examples RHEL/CentOS 7/8

Deepak Prasad9 min read
devops

Setup KVM DRBD Cluster File System Pacemaker CentOS 8

Step-by-Step tutorial to configure DRBD CLuster File System with clone using Pacemaker 2.0 on KVM Virtual Machines with RHEL/CentOS 8 Linux. Verify DRBD Failover

Deepak Prasad11 min read
devops

How to install multi node openstack on virtualbox with packstack on CentOS

Install multi node OpenStack on VirtualBox using Packstack using CentOS 7 VM on Windows 10 laptop. Generate and configure packstack answer file for Openstack

Deepak Prasad22 min read
devops

SOLVED: Update ConfigMap & Secrets without Pod restart in K8s

In this tutorial, we'll explain how you can update the values of configmaps and secrets in Kubernetes without restarting the pods.

Deepak Prasad6 min read
devops

Examples to secure Kubernetes cluster nodes (security context)

The security context can be used to enhance Kubernetes security for the cluster node by applying different policies for the pods and containers.

Deepak Prasad13 min read
devops

How to perform kubernetes health check using probes

Kubernetes performs three layer of health checks using probes. You can use readiness, liveness or startup probes with tcpget, exec and httpget methods.

Deepak Prasad15 min read
devops

Binary Options Trading Bots: The Intersection of Finance and Programming

In the dynamic world of financial markets, binary options have carved a niche for themselves due to their simplicity and high potential returns. However, like

Deepak Prasad6 min read
devops

Perform Kubernetes Autoscaling | Horizontal Pod Autoscaler (HPA)

Kubernetes autoscaling requires a metrics-server to monitor the CPU and Memory usage. Horizontal Pod Autoscaler can be used to automatically scale up and down the number of pods based on provided CPU and Memory thresold …

Deepak Prasad10 min read
devops

Terraform: EKS Cluster Provision on AWS [10 Steps]

This article shall cover how to deploy an EKS cluster on AWS using Terraform. There are many ways to deploy an EKS cluster on AWS such as using the web

Deepak Prasad15 min read
devops

Kubernetes SecurityContext Capabilities Explained [Examples]

Create a privileged and non-privileged container inside a Kubernetes Pod. How to add or drop all the capabilities from a Pod. How to add single or pre-defined set of capabilities to a container. Understanding more about …

Deepak Prasad10 min read
devops

12 steps to setup Kubernetes Cluster on AWS EC2

We will setup Kubernetes Cluster on AWS EC2 instances with controller and worker nodes. Kubernetes Architecture on AWS Cloud.

Deepak Prasad27 min read