Direct DevOps from Quality Thought

--- - name: Install Tomcat 10 hosts: localhost become: yes vars: tomcat_version: 10.1.55 tomcat_home: /opt/tomcat java_version: openjdk-21-jdk tasks: - name: Update apt cache and install Java ansible.builtin.apt: name: "{{ java_version }}" update_cache: yes state: present - name: Create tomcat group ansible.builtin.group: name: tomcat system: yes - name: Cre...

Load Balancing in AWS 1. Layer 4 Load Balancing

AWS provides a Network Load Balancer (NLB) which operates at Layer 4 of the OSI model.

What Layer 4 understands: IP Source/Destination IP address Protocol TCP / UDP Ports Port numbers (e.g., 80, 443)

Layer 4 does not inspect HTTP headers, paths, or cookies — ...

Application Load Balancer Overview

An Application Load Balancer (ALB) is a Layer 7 load balancer that distributes HTTP/HTTPS traffic across multiple backend targets. It improves availability, scalability, and security by intelligently routing requests based on content such as URL paths, host headers, or query strings.

Cor...

Ansible Role

In Ansible, a Role is a mechanism for automatically loading certain vars_files, tasks, handlers, and templates based on a known file structure. Instead of writing a massive, single-file playbook (monolithic style), you group your automation assets into a standardized directory structure.

Why Use Roles Reusability: Share role...

Pods Pod is an atomic unit of creation in k8s Think of Pod as a small package with one or more containers in it Every pod will get an unique ip in the k8s cluster Containers in the Pod have shared resources i.e. shared network shared storage

Consider typical application
If we have to run this in containers, we run each component in a container
When i...