Managing Jenkins
After installing Jenkins, you need to know how to manage it – install plugins, secure it, and perform basic administration tasks.
Installing Plugins
Plugins add functionality. To install:
1. Go to "Manage Jenkins" → "Plugins" → "Available".
2. Search for a plugin (e.g., "Git" or "Docker").
3. Check the box and click "Install without restart".
Common plugins to install:
- Git – Integrate with Git repositories.
- Pipeline – Enables Pipeline jobs (Declarative/Scripted).
- Blue Ocean – Modern UI for pipelines.
- Docker – Build and use Docker containers.
Securing Jenkins
By default, Jenkins allows anyone to do anything. You should enable security:
1. "Manage Jenkins" → "Security" → "Configure Global Security".
2. Check "Enable security".
3. Choose "Jenkins’ own user database" and "Logged-in users can do anything".
4. Create a new admin user if you haven't already.
5. Also consider using HTTPS and role‑based access control (Role Strategy plugin).
Managing Nodes (Agents)
To add a new agent:
1. "Manage Jenkins" → "Nodes" → "New Node".
2. Give it a name, select "Permanent Agent".
3. Set the remote root directory (e.g.,
/home/jenkins/agent).4. Choose launch method (SSH or JNLP).
5. Provide host credentials.
Backup and Restore
The most important thing to back up is
JENKINS_HOME. You can copy the entire directory. There are also plugins like "ThinBackup" for scheduled backups.System Configuration
"Manage Jenkins" → "Configure System" contains global settings:
- Jenkins URL (must be correct for external triggers).
- Number of executors (parallel builds).
- Environment variables.
- Global tool configuration (JDK, Maven, Git).
Two Minute Drill
- Install plugins via "Manage Jenkins" → "Plugins".
- Enable security to control user access.
- Add agents under "Manage Jenkins" → "Nodes".
- Back up
JENKINS_HOMEregularly. - Configure global settings and tools in "Configure System".
Need more clarification?
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