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Chart Structure and Configuration A Helm chart is a collection of files that describe a related set of Kubernetes resources. The core components include Chart.yaml, values.yaml, and template files under the templates/ directory. Chart.yaml This file defines metadata about the chart: apiVersion: v1 name: k8sapp version: 0.1.1 appVersion: "1 ...

Kubectl Deploymant Workflow The process for deploying applications using Kubectl involves several key steps: Verify cluster readiness (Minikube or kubeadm) Create Deployment configuration Apply the configuration Verify deployment status Deploying a Sample Web Application 1. Creating the Deployment Configuration A Deployment object manages app ...

Creating the Base Image This process builds an Nginx imagee from AlmaLinux:latest that automatically starts Nginx when containers launch. Setting Up Files mkdir ~/docker-nginx cd ~/docker-nginx echo 'Nginx operational' > index.html Dockerfile Configuration FROM almalinux:latest RUN yum clean all && \ yum -y install epel-release ...

Snipe-IT is an open-source application for tracking IT assets, including hardware, software licenses, and accessories. Setting Up the Docker Environment Install Docker and Docker Compose on your host system. Configuring Environment Variables Create a directory for configuration files and generate an environment file. mkdir -p /opt/snipe-it/conf ...

Preparing Mount Points Create directories for persistent configuration and data storage: mkdir -p /opt/mysql-instance/{conf,storage} Configuring Character Sets Create the configuration file at /opt/mysql-instance/conf/custom.cnf: [mysqld] user=mysql character-set-server=utf8mb4 [client] default-character-set=utf8mb4 [mysql] default-character ...

Pull the Jenkins Docker image. docker pull jenkins/jenkins Set up a persistent storage directory on the host and adjust permissions. mkdir -p /var/jenkins_data chmod 777 /var/jenkins_data Launch a Jenkins container with custom configurations. -d runs the container in detached mode. -p 10240:8080 maps the container's Jenkins web interfac ...

Image Version Selection Identify the appropriate release tag from the official Atlassian Docker Hub repository. Tags follow the pattern {version}-{jdk} (e.g., 8.5.0-jdk17). For production environments, prefer Long-Term Support (LTS) releases over feature releases to ensure stability and extended support cycles. Available versions are listed at: ...

Core Dockerfile Instructions Base Image Specification Purpose Defines the foundation image for the container. Syntax FROM <image-name> FROM <image-name>:<tag> FROM <image-name>@<digest> Example using a Python environment with ODBC support: FROM tadeorubio/pyodbc-msodbcsql17:latest Key Points Must be the first no ...

What Is Docker? Docker is an open-source platform that enables developers to build, deploy, and run applications in isolated environments called containers. It follows a client-server architecture where the Docker client communicates with the Docker daemon (server), which handles container creation, execution, and distribution. Communication oc ...

A Dockerfile is a text document containing a sequence of instructions that Docker uses to assemble a container image. Each line represents a layer, and04 the final image is the result of executing all specified commends in order. Consider this basic Dockerfile for a Node.js application: FROM node:18-alpine LABEL project="my-web-app" W ...