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DevOps revolutionizes software delivery by integrating development and operations, ensuring faster, reliable, and automated deployments. Below are the six key components of DevOps, along with practical implementations.
1. Continuous Integration (CI)
CI involves frequent code commits to a shared repository, triggering automated builds and tests.
You Should Know:
<h1>Example Jenkins CI Pipeline (Declarative Syntax)</h1>
pipeline {
agent any
stages {
stage('Build') {
steps {
sh 'mvn clean package'
}
}
stage('Test') {
steps {
sh 'mvn test'
}
}
}
}
– Tools: Jenkins, GitLab CI, GitHub Actions
– Command to trigger Jenkins job:
curl -X POST http://jenkins-server/job/my-pipeline/build --user user:token
### **2. Continuous Deployment (CD)**
CD automates the release process post successful CI.
**You Should Know:**
<h1>Kubernetes Deployment Example</h1> kubectl apply -f deployment.yaml
– Tools: ArgoCD, Spinnaker
– Rollback a failed deployment:
kubectl rollout undo deployment/my-app
### **3. Configuration Management (CM)**
Ensures consistency across environments using code.
**You Should Know:**
<h1>Ansible Playbook Example</h1> <ul> <li>hosts: webservers tasks: </li> <li>name: Install Apache apt: name: apache2 state: present
ansible-playbook -i inventory.ini playbook.yml
### **4. Infrastructure as Code (IaC)**
Manages infrastructure via declarative code.
**You Should Know:**
<h1>Terraform Example (AWS EC2)</h1>
resource "aws_instance" "web" {
ami = "ami-123456"
instance_type = "t2.micro"
}
– Tools: Terraform, AWS CloudFormation
– Apply Terraform changes:
terraform init && terraform apply
### **5. Monitoring and Alerting**
Tracks system health and notifies on anomalies.
**You Should Know:**
<h1>Prometheus Query Example</h1>
up{job="node-exporter"} == 0
– Tools: Prometheus, Grafana, ELK Stack
– Check Prometheus targets:
curl http://prometheus-server:9090/api/v1/targets
### **6. DevOps Culture**
Encourages collaboration between Dev and Ops.
**You Should Know:**
- Daily standups, blameless postmortems.
- Encourage shared ownership via:
</li> </ul> <h1>Git collaboration</h1> git pull --rebase origin main
### **What Undercode Say**
DevOps is not just tools—it’s a mindset. Automate relentlessly, monitor proactively, and foster a culture of continuous improvement. Use Linux commands like
grep,awk, and `journalctl` for log analysis, and Windows equivalents like `Get-EventLog` for system checks.**Expected Output:**
A streamlined CI/CD pipeline with automated testing, IaC-managed infrastructure, and real-time monitoring for rapid, resilient software delivery.
**Relevant URLs:**
References:
Reported By: Ashish – Hackers Feeds
Extra Hub: Undercode MoN
Basic Verification: Pass ✅Join Our Cyber World:
