Jenkins
The veteran of CI/CD. Powers 60% of enterprise pipelines in India — love it or hate it, you'll work with it.
What is Jenkins, really?
Jenkins is the OG CI/CD server. Open-source, plugin-based, self-hosted, and battle-tested in every Fortune 500 company. While modern teams are moving to GitHub Actions / GitLab CI, the reality is that 60%+ of enterprise jobs in Indian IT services still expect Jenkins skills.
At Cloudadhar we teach Jenkins the modern way — declarative pipelines in Jenkinsfile, agents-on-Kubernetes (no static slave VMs), shared libraries for reuse, and the security hardening you'll need to pass an audit.
What makes it special
- Self-hosted = full control over data, network, and cost
- 1,800+ plugins covering every tool, cloud, and notification system
- Declarative Jenkinsfile lives in Git alongside your code
- Dynamic agents on Kubernetes (kubernetes-plugin) — no idle VMs
- Massive enterprise install base — guaranteed job demand in India
When you should reach for it
- You work at an Indian IT services company (TCS, Infosys, Wipro, Capgemini, etc.)
- Your codebase is hybrid (GitHub + Bitbucket + on-prem GitLab)
- You need to integrate with legacy systems (mainframe builds, old artifact servers)
- You have strict on-prem / air-gapped requirements
- You're modernizing an existing Jenkins install (don't throw it out — fix it)
A real Jenkins story from production
“A client had 400 Jenkins jobs configured through the UI by an engineer who'd left 4 years prior. Nobody dared touch them. We did a 6-month modernization: migrated everything to declarative Jenkinsfiles in Git, moved agents to Kubernetes (saved $80k/yr in idle EC2 cost), and added a shared library so all 400 jobs share 80% of their logic. The CI infrastructure went from 'scary black box' to 'first-class citizen reviewable in PRs'.”
— Gangadhar, 12+ yrs in production cloud
How to actually learn Jenkins
- 1Install Jenkins on Docker / EC2 + run your first freestyle job (1 day)
- 2Switch everything to declarative Jenkinsfile in Git
- 3Set up agents on Kubernetes using the kubernetes-plugin
- 4Build a shared library for common pipeline steps
- 5Add credentials + role-based access (Folders + Matrix Auth)
- 6Backup + DR — JCasC (Configuration as Code) for the whole controller
Want to learn Jenkins production-style?
Live batches, 1:1 mentorship, hands-on labs in a real cloud account. No slideware. No fluff. Just the playbooks I use as a DevSecOps Lead.
