All posts in Kubernetes

Kubernetes ResourceQuota and LimitRange are two important mechanisms for managing resource allocation and usage within a Kubernetes cluster. Here’s a comparison of ResourceQuota and LimitRange features and use cases in…

2024 Notes Troubleshooting networking in Kubernetes can sometimes be complex due to the distributed nature of containerized applications. Below is a list of commands with explanations to help troubleshoot networking…

Here’s an updated list of containerized storage orchestration solutions for Kubernetes as of 2025: Persistent Volume (PV) and Persistent Volume Claim (PVC) Storage Classes Container Storage Interface (CSI) Rook OpenEBS…

Here is a detailed table summarizing the log file locations, purposes, and use cases for Kubernetes logs: Comprehensive Table of Kubernetes Logs Log Directory/Location Log File(s) Purpose Use Case /var/log/containers/…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

What is Kubernetes ? Kubernetes is an open-source container orchestration platform planned to automate the deployment, scaling, and management of containerized applications. It was originally evolved by Google and is…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

A ReplicationController is a Kubernetes controller that ensures that a specified number of pod replicas are running at any one time. In other words, a ReplicationController makes sure that a…

CRI plugins, or Container Runtime Interface plugins, are a set of tools that allow you to use different container runtimes with Kubernetes. By default, Kubernetes uses the Docker container runtime….

What is k3s? K3s is a lightweight and easy-to-install Kubernetes distribution designed for use in resource-constrained environments, edge computing, and development scenarios. It’s a simplified version of Kubernetes that retains…

Logging Operator EFK(Elasticsearch, Fluentd, and Kibana) Logging Operator is an operator created in Golang to set up and manage EFK(Elasticsearch, Fluentd, and Kibana) cluster inside Kubernetes and Openshift environment. This…

Log monitoring in Kubernetes is the process of collecting, storing, and analyzing logs from Kubernetes nodes, pods, and applications. This can be done to identify potential problems, such as errors,…

Tigera Calico Troubleshooting and diagnostics Tigera Calico Component logs Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at…

Open source Ingress controllers NGINX Ingress Controller: The NGINX Ingress Controller is the most popular Ingress controller for Kubernetes. It is based on the NGINX web server and is easy…

The “pause container” is a special, internal container created and managed by Kubernetes within each pod. Its primary purpose is to serve as a placeholder for the network namespace and…

Static Pods are a special type of Pod in Kubernetes that are managed directly by the kubelet daemon on a specific node, without the API server observing them. This means…

A Kubernetes Pod disruption budget (PDB) is a policy that defines the minimum number of pods that must be available at any given time for a particular workload. This helps…

A PriorityClass in Kubernetes is a non-namespaced object that defines a mapping from a priority class name to an integer value of the priority. The higher the value, the higher…

Here is a list of some of the most popular CNI plugins used in Kubernetes: Other popular CNI plugins include: Container Network Interface (CNI) is an open standard for configuring…

Here is a list of Ingress controllers for Kubernetes: NGINX Ingress Controller: The NGINX Ingress Controller is a widely used and battle-tested solution for managing external access to services within…

1+ 4 Kubernetes, also known as K8s, is an open-source container orchestration platform. It automates many of the manual processes involved in deploying, managing, and scaling containerized applications. Kubernetes groups…

Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech insights at DevOps School, travel stories at Holiday Landmark, stock market…

When kubectl receives a create command, it performs the following steps: Rajesh KumarI’m a DevOps/SRE/DevSecOps/Cloud Expert passionate about sharing knowledge and experiences. I am working at Cotocus. I blog tech…

Selecting the best job support provider for Kubernetes depends on your specific needs, technology stack, and location. Each provider may have different strengths and offerings. To help you make an…

Following commands would help you to create 1 Master and 1 Node in same VM. Sample Code – https://github.com/certifications-tutorials/cks-course-environment/ How to download using git $ git clone https://github.com/certifications-tutorials/cks-course-environment/ Rajesh KumarI’m…

Managing stateful and stateless applications in a distributed environment like Kubernetes requires different approaches due to the nature of data persistence and scalability. Let’s explore how to manage both types…

Kubernetes custom resources (CRs) are extensions of the Kubernetes API that allow you to define your own resources. CRs can be used to represent anything that you want to manage…

In Kubernetes, a Service is an abstraction that defines a logical set of pods and a policy by which to access them. It provides a stable network endpoint (usually an…