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Docker Containers and virtual machines  A container runs natively on Linux and shares the kernel of the host machine with other containers. It runs a discrete process, taking no more memory than any other executable, making it lightweight. By contrast, a virtual machine (VM)…

Docker -The underlying technology Docker is written in Go and takes advantage of several features of the Linux kernel to deliver its functionality. Namespaces Docker uses a technology called namespaces to provide the isolated workspace called the container. When you run a container, Docker creates…

Docker Introduction Before starting discussion on docker lets first talk about Monolithic applications and Microservice application differences. Let’s review below diagram

Maven Commands Maven Installation on Ubuntu OS. apt update apt install maven -y Validate the installation java –version or java -version mvn –version Create a quick Start project #Run the below command to create a archetype mvn archetype:generate # Provide…

Maven Introduction   Before discussing Maven lets first understand the purpose of build tool Build Tool A build tool is a tool that automates everything related to building the software project. Building a software project typically includes one or more…

Assignment Question 1: Create a Namespace Create a new Kubernetes namespace named “my-namespace.” Question 2: Create a Pod Create a Pod named “nginx-pod” in the “my-namespace” namespace running an Nginx container. Ensure that it is in a “Running” state. Question 3: Deploy…

Garfana Garfana: It is a visualization tool to provide graphical representation for monitoring services like Prometheus. Steps to install Garfana on the Kubernetes environment. Step 1: Create a file named grafana-datasource-config.yaml apiVersion: v1kind: ConfigMapmetadata:  name: grafana-datasources  namespace: monitoringdata:  prometheus.yaml: |- …

Kubernetes – Prometheus Prometheus  Prometheus is an open-source monitoring framework. It provides out-of-the-box monitoring capabilities for the Kubernetes container orchestration platform. Metric Collection: Prometheus uses the pull model to retrieve metrics over HTTP. Metric Endpoint: The systems that you want to…

Monitoring, Logging, Debugging, Troubleshooting Kubernetes Pod logs   Kubectl logs <<Pod Name>> To find the Kubernetes cluster events   Kubectl events Docker logs docker logs <<container name>> To find the events occurred in docker daemon docker events — since <<date>>…

Horizontal Pod AutoScaling Horizontal Pod Autoscaler The Horizontal Pod Autoscaler automatically scales the number of Pods in a replication controller, deployment, replica set or stateful set based on observed CPU utilization (or, with custom metrics support, on some other application-provided metrics). Note…