Configuring Node and Agent Settings in Jenkins

1. Introduction

This lesson covers how to configure node and agent settings in Jenkins. This process is essential for setting up a scalable and efficient CI/CD pipeline.

2. Key Concepts

Key Definitions

Node: A machine that Jenkins uses to run builds. It can be the master or a slave agent.
Agent: A specific type of node dedicated to running builds for Jenkins.
Executor: A computational resource for executing jobs on a node.

3. Configuring Nodes

Follow these steps to configure nodes in Jenkins:

Log in to your Jenkins dashboard.
Click on Manage Jenkins.
Select Manage Nodes and Clouds.
Click on Create New Node.
Enter the node name and select the type (Permanent Agent or Cloud).
Configure the node settings such as Remote Root Directory and Labels.
Set the Launch Method according to your requirements.
Click on Save to apply the settings.

4. Agent Settings

After configuring nodes, you can set agent-specific settings:

For example, to configure a new agent, you might use the following settings in the node configuration:


            # Remote Root Directory
            /home/jenkins/agent

            # Usage
            Use this node as much as possible

            # Labels
            docker, linux

5. Best Practices

Important: Ensure nodes are properly secured and monitored to prevent unauthorized access.

Regularly update Jenkins and its plugins to the latest versions.
Use labels to categorize nodes for specific jobs.
Monitor node performance to optimize build times.

6. FAQ

How do I remove a node?

To remove a node, go to Manage Nodes, select the node, and click on Delete.

Can I configure multiple agents on a single node?

No, each node can have only one agent configured. However, you can configure multiple nodes on different machines.

Flowchart of Node Configuration Process


        graph TD;
            A[Start] --> B[Log in to Jenkins];
            B --> C[Manage Jenkins];
            C --> D[Manage Nodes and Clouds];
            D --> E[Create New Node];
            E --> F[Configure Node Settings];
            F --> G[Save Settings];
            G --> H[End];