Key Concepts in Jenkins

1. Continuous Integration (CI)

• Jenkins automates the integration of code changes, ensuring software is built and tested frequently.

2. Continuous Delivery (CD)

• Jenkins automates the deployment of applications, ensuring reliable software releases.

3. Jenkins Pipeline

• Defines automated workflows using declarative or scripted syntax.

4. Jobs & Builds

• Jobs define tasks like building, testing, and deploying code.

5. Plugins

• Extends Jenkins functionality with integrations for Git, Docker, Kubernetes, and more.

6. Master-Agent Architecture

• Scales Jenkins by distributing workloads across multiple nodes.

7. Declarative vs Scripted Pipelines

• Declarative pipelines are easier to read and maintain.
• Scripted pipelines offer flexibility with Groovy scripting.

8. Version Control Integration

• Supports Git, GitHub, GitLab, and Bitbucket for source code management.

9. Webhooks & Polling

• Triggers builds automatically upon code changes.

10. Distributed Builds

• Utilizes agents to offload build tasks, improving scalability.

11. Security & Authentication

• Supports role-based access control (RBAC), LDAP, and OAuth.

12. Credentials Management

• Securely stores secrets like API keys and passwords.

13. Blue-Green Deployment

• Deploys new versions without downtime using multiple environments.

14. Infrastructure as Code (IaC)

• Automates infrastructure provisioning using Terraform, Ansible, and Kubernetes.

15. Monitoring & Logging

• Integrates with Prometheus, Grafana, and ELK for real-time monitoring.

16. Jenkinsfile

• Defines pipelines as code, ensuring reproducibility.

17. Parallel Execution

• Speeds up pipelines by running tasks concurrently.

18. Notifications & Alerts

• Integrates with Slack, email, and webhook services for build notifications.

19. High Availability (HA)

• Ensures Jenkins uptime by using backup servers and failover strategies.

20. Best Practices

• Keep Jenkins updated.
• Use folders and naming conventions for job organization.
• Secure Jenkins with authentication and access control.