master slave configuration

Jenkins Master and Slave configuration

🧰 Prerequisites

1. Jenkins server

2. Slave server with Java installation

Procedure

1

Go to Manage Nodes

Manage Jenkins --> Manage Nodes and Clouds --> New Node

2

Add node

Add the node name as Permanent Agent

3

Provide agent details

Provide the information below to add the Jenkins agent:

• Name: uniquely identifies an agent within this Jenkins installation

• Description:

• Number of executors: 2

• Remote root directory: /home/ec2-user/maven-agent

• Labels: Labels (or tags) are used to group multiple agents into one logical group.

• Usage:

  • Use this node as much as possible

  • Only build jobs with label expressions matching this node

• Launch method:

  • Launch agent by connecting it to the master

  • Launch agent via execution of command on the controller

• Custom WorkDir path: custom Remoting work directory will be used instead of the Agent Root Directory

• - Use WebSocket [x]

• Availability:

  • Keep this agent online as much as possible

  • Bring this agent online according to a schedule

  • Bring this agent online when in demand, and take offline when idle

4

Start the agent on the slave server

Once you save the above configuration you will get a command which should be executed on the agent. It contains agent.jar, a secret-file, and a jnlp file.

start-agent.sh

echo "secret_key" > secret-file
java -jar agent.jar -jnlpUrl http://<Jenkins_URL>/computer/abc/jenkins-agent.jnlp -secret @secret-file -workDir "/home/ec2-user"

5

Use the agent in a job

Once connected you can create or edit a job to choose this option in the "Restrict where this project can be run" setting.