DevOps Simplified for Cloud Newbies!

• Each section focuses on one tool.

• Clean, visual highlights of terminologies, commands, file structure, and a simple file syntax example for Jenkins, Docker, Kubernetes, Terraform, and Ansible.

I’ve also added Kubernetes and Ansible sample deployment files with syntax explanations.

---

DevOps Essentials – Simplified for Cloud Newbies

Master Jenkins, Docker, Kubernetes, Terraform & Ansible
With key terms, commands, file structure & file syntax

#DevOps #CloudNewbies #100DaysOfCloud

---

Jenkins – Automate Everything

Key Terms: Pipeline, Agent, Jenkinsfile
Commands:

• java -jar jenkins.war

• jenkins --version

• curl -X POST http://<jenkins_url>/job/<job_name>/build

File Structure:

• Jenkinsfile (project root)

• .jenkins/, workspace/, jobs/

Sample Jenkinsfile:

pipeline {
  agent any
  stages {
    stage('Build') { steps { echo 'Build...' } }
    stage('Test')  { steps { echo 'Test...' } }
    stage('Deploy'){ steps { echo 'Deploy...' } }
  }
}

---

Docker – Build. Ship. Run.

Key Terms: Image, Container, Dockerfile
Commands:

• docker build -t app .

• docker run -p 8080:80 app

• docker ps, docker exec

File Structure:

• Dockerfile, docker-compose.yml

Sample Dockerfile:

FROM node:14  
WORKDIR /app  
COPY . .  
RUN npm install  
CMD ["node", "index.js"]

---

Kubernetes – Container Orchestration

Key Terms: Pod, Deployment, Service, ConfigMap
Commands:

• kubectl apply -f deploy.yaml

• kubectl get pods

• kubectl logs <pod>

File Structure:

• k8s/ folder: deployment.yaml, service.yaml

Sample deployment.yaml:

apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-app
spec:
  replicas: 2
  selector:
    matchLabels:
      app: web
  template:
    metadata:
      labels:
        app: web
    spec:
      containers:
      - name: nginx
        image: nginx:latest
        ports:
        - containerPort: 80

---

Terraform – IaC Power Tool

Key Terms: Provider, Resource, State File
Commands:

• terraform init, plan, apply, destroy

File Structure:

• main.tf, variables.tf, outputs.tf

Sample main.tf:

provider "aws" {
  region = "us-east-1"
}

resource "aws_instance" "web" {
  ami           = "ami-0c55b159cbfafe1f0"
  instance_type = "t2.micro"
}

---

Ansible – Agentless Automation

Key Terms: Playbook, Inventory, Roles
Commands:

• ansible all -m ping -i inventory

• ansible-playbook playbook.yml

File Structure:

• inventory, playbook.yml, roles/

Sample playbook.yml:

- name: Install & Start Apache
  hosts: webservers
  become: true
  tasks:
    - name: Install Apache
      apt:
        name: apache2
        state: present

    - name: Start Apache
      service:
        name: apache2
        state: started
        enabled: true

Final Thoughts

Keep It Simple. Learn It Right. Build With Confidence.
Drop a comment if you want a deep-dive series on any of these tools!

#CloudComputing #DevOpsCareers #TechSimplified #TheCloudJourneyHQ

---