Jenkin-Agent

### Step-by-Step Lab to Create an EC2 Instance and Configure it as a Jenkins Agent with the `test` Label

#### **Part 1: Create an EC2 Instance**

1. **Login to AWS Console**:
   - Go to the [AWS Management Console](https://aws.amazon.com/console/).
   - Navigate to the **EC2 Dashboard**.

2. **Launch a New Instance**:
   - Click **Launch Instances**.
   - Set the instance name as **Jenkins-Agent-Test**.

3. **Choose Amazon Machine Image (AMI)**:
   - Select **Ubuntu Server 24.04 LTS (HVM), SSD Volume Type**.

4. **Select Instance Type**:
   - Choose an instance type (e.g., `t2.micro` for testing or `t2.medium` for better performance).

5. **Configure Instance Settings**:
   - Keep the default settings for network.
   - Assign a public IP address.

6. **Add Storage**:
   - Modify the storage to **8 GiB**.

7. **Configure Security Group**:
   - Create a new security group with the name `jenkins-agent-sg`.
   - Add inbound rules to open **all ports** temporarily:
     - **Type**: All Traffic
     - **Protocol**: All
     - **Port Range**: 0-65535
     - **Source**: Anywhere (0.0.0.0/0, ::/0)

8. **Launch the Instance**:
   - Select an existing key pair or create a new one to SSH into the instance.
   - Launch the instance.

---

#### **Part 2: Configure the EC2 Instance**

1. **Connect to the EC2 Instance**:
   - SSH into the instance:
     ```bash
     ssh -i <your-key.pem> ubuntu@<instance-public-ip>
     ```

2. **Update the System**:
   ```bash
   sudo apt update && sudo apt upgrade -y
   ```

3. **Install Java (Required for Jenkins Agent)**:
   ```bash
   sudo apt install -y openjdk-11-jdk
   java -version
   ```


#### **Part 3: Configure Jenkins Master**

1. **Access Jenkins Dashboard**:
   - Login to your Jenkins server at `http://<jenkins-master-ip>:8080`.

2. **Add a New Node**:
   - Go to **Manage Jenkins** > **Manage Nodes and Clouds**.
   - Click **New Node**.

3. **Define the Node**:
   - Name: `test`
   - Select **Permanent Agent**.
   - Click **OK**.

4. **Configure Node Details**:
   - **Remote root directory**: `/home/jenkins`
   - **Labels**: `test`

5. **Save and Connect**:
   - Save the node configuration.
   - Jenkins will show the node is not sych click on nodes and copy the command and paste it on Master so that it will get connected to master as a slave.