Prerequisites for Jenkins Installation

Jenkins is one of the most popular Open Source Continuous Integration and Continuous Development (CI/CD) tool across the globe. It helps developers automate changes to their code and quickly deploy it to production. Jenkins can help organizations save time and resources by automating repetitive tasks and streamlining the software delivery process.

Before we dive into the installation process, there are a few prerequisites that need to be in place.

Java Development Kit (JDK) Installation

Jenkins, being a Java application, requires Java Development Kit (JDK) to be installed. As Jenkins is a Java Web Application, it needs the Java environment to be installed and set up properly on the machine before installing and configuring Jenkins.

The latest version of JDK can be downloaded from Oracle’s official website. It’s important to download the correct version depending on the Operating System (OS) installed on the machine. When downloading, make sure to select the correct version of JDK according to the installed OS (e.g. Windows, macOS, or Linux) and its architecture (64-bit or 32-bit).

If you’re using a Windows Operating System, you can follow these simple steps to install the JDK:

1. After downloading the JDK file, double click it to open the Java SE Development Kit Installer window.
2. Click Next to move on to the next step of the installation process.
3. Choose the installation path and click Next.
4. Select the installation type and click Next. You can choose between the standard installation or a custom installation, depending on your preference.
5. At this point, the installer will install the JDK. When finished, click Close to complete the installation process.
6. After the installation, open Command Prompt and type “java -version”. If you see information about the version of Java, it means that it has been correctly installed.

After installing JDK, we can proceed with the installation and configuration of Jenkins.

Downloading Jenkins

If you want to use Jenkins as a CI/CD tool for your software projects, the first step is to download it. Visit the official Jenkins download page at https://www.jenkins.io/download/ to start the process. This page provides links to different installation packages depending on your operating system and deployment environment.

The most common installation package is the generic Java package, which is available for Windows, macOS, and Linux. This package contains the Jenkins web application as a WAR file, which can run on any web container that supports Servlet 3.0 specification or later.

Before downloading Jenkins, make sure your system meets the minimum requirements to run it, which include:

• Java 8 or later version installed and added to the PATH environment variable.
• At least 1 GB of RAM available.
• At least 1 GB of free disk space for Jenkins and its plugins.
• Internet connectivity to download plugins and updates.

Once you have verified that your system meets these requirements, select the package that matches your operating system and click on the download link to start the download process. Most browsers will automatically save the package to your Downloads folder, but you can choose a different location if you prefer.

After the download completes, you should have a ZIP or TAR file containing the Jenkins WAR file and other files and folders. Extract the contents of the package to a directory of your choice, such as C:\Jenkins or /usr/local/jenkins. This directory will be the home directory of your Jenkins installation and will contain all the necessary files and configuration data.

At this point, you can start the Jenkins web server by running the command java -jar jenkins.war in a command prompt or terminal window. This will launch the Jenkins web application on a local server at http://localhost:8080/ by default.

However, before accessing the Jenkins web interface, you need to complete the initial setup by following the instructions on the screen. This involves selecting and installing plugins, creating an admin user, and configuring basic settings such as the system timezone and email notifications.

Once you have completed the setup, you can log in to the Jenkins web interface with the credentials you created and start creating and managing your pipelines, jobs, and nodes.

Installing Jenkins on Windows

If you are looking to set up Continuous Integration (CI) for your project, Jenkins is a great tool that can help you accomplish that. Jenkins is a popular open-source automation server that can assist you in automating your software development process. It is a Java-based application that runs on multiple platforms, including Windows. In this tutorial, we will guide you through the steps required to install Jenkins on Windows.

Before we dive into the installation process, it is important to ensure that your system meets the minimum requirements necessary to download and install Jenkins.

• Your system must have a 64-bit version of Windows 7 or newer installed
• The hardware requirements include at least 1GB of RAM and 10GB of available hard-disk space
• Java 8 or newer version must be installed on your system

Step 1: Navigate to the Jenkins official website and download the executable file for Windows. You can download the zip version or the installer version depending on your preference. The installer version is an executable file that will guide you through the installation process with a step by step guide. On the other hand, the zip version will require you to extract the files to a specific folder manually. Once the download is complete, extract the files from the zip archive or execute the installer.

Step 2: After executing the downloaded file, you will see a new window that will ask you to provide a destination folder for the installation. By default, the installer will propose the folder C:\Program Files (x86)\Jenkins. You can change this directory if needed. It is essential to mention that you have to choose a secure directory because the necessary files are going to be stored in this folder.

Step 3: The installation process might take a few minutes, depending on the speed of your computer. Once the installation is complete, you will see a screen asking you whether you want to launch Jenkins and configure it automatically or configure it later. Choose the option Run Jenkins, and it will start the configuration process automatically. Wait for a few minutes until the Jenkins server is up and running.

Step 4: After the installation process is finished, open your web browser and navigate to http://localhost:8080. You should be welcomed by the Jenkins interface. However, if you encounter any issues with connecting to the http://localhost:8080 URL, you may need to modify your firewall settings to allow access to the Jenkins server.

Step 5: To get started with Jenkins, create a new admin user account by filling out the registration form presented to you on the login screen. After registering your account, you will be redirected to the Jenkins dashboard, where you can manage your Jenkins server and create new jobs and pipelines.

Step 6: To create a new project or task in Jenkins, you will need to create a new job. It would help if you navigated to Jenkins’s web interface and select “New Item” from the list of options. Then, give your new job a suitable name and select the type of project you are going to be working on. Finally, configure the required fields, including the source code management system, build triggers, and other settings.

Step 7: Once you have created your job, you can start the build process by clicking the “Build Now” button. Jenkins will begin to execute the build script or task and display the output logs in real-time on the build page. You can also configure Jenkins to send notifications via email or other messaging services once the build process is complete.

In conclusion, installing Jenkins on Windows is a simple and straightforward process. After completing the installation, you will have access to a powerful automation tool that will help you streamline your software development process. With the flexibility and customization options provided by Jenkins, you can create automated builds, test scripts, and other essential tasks that can significantly improve your project’s efficiency.

Jenkins Installation Tutorial

Installing Jenkins on Linux

Jenkins is an open-source software tool that helps automate the software development process by providing continuous integration and continuous deployment (CI/CD) services. Jenkins is easy to install and can run on various operating systems such as Linux, Windows, and macOS, but in this tutorial, we will focus on how to install Jenkins on Linux, specifically Ubuntu 20.04.

Prerequisites

Before we begin installing Jenkins on Linux, we need to ensure that we meet the following prerequisites:

• A server running Ubuntu 20.04 with root privileges.
• Java installed on the server. Jenkins requires Java 8 or later, so we need to install Oracle Java or OpenJDK 8.

Step 1: Install Java

Jenkins requires Java to be installed on the server. We can check if Java is already installed on our system by running the following command:

java --version

If we do not have Java installed, we can install it by running the following command:

sudo apt update

sudo apt install default-jdk -y

After installation, we can verify the Java version by running the following command:

java -version

Step 2: Install Jenkins

The next step is to install Jenkins on our Ubuntu 20.04 server. We can do this by following these steps:

1. First, we need to add the Jenkins repository key to our system by running the following command:

wget -q -O - https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo apt-key add -

2. Next, we need to add the Jenkins repository to our system:

sudo sh -c 'echo deb http://pkg.jenkins.io/debian-stable binary/ > /etc/apt/sources.list.d/jenkins.list'

3. We need to update our package list:

sudo apt update

4. Now we can go ahead and install Jenkins:

sudo apt install jenkins -y

Step 3: Start and Enable Jenkins

After installing Jenkins, we need to start and enable the service using the following commands:

sudo systemctl start jenkins

sudo systemctl enable jenkins

Step 4: Configure Jenkins

Once Jenkins is installed and enabled, we can access the Jenkins web interface by opening our web browser and navigating to:

http://[Server-IP-Address]:8080

This will bring up the Jenkins login page. The initial password can be found at:

/var/lib/jenkins/secrets/initialAdminPassword

After entering the initial password and logging into the Jenkins dashboard, we can start configuring Jenkins according to our requirements.

Jenkins is now installed and ready to be used to automate our CI/CD pipeline on Linux.

Conclusion

In this tutorial, we have shown how easy it is to install Jenkins on Linux, specifically Ubuntu 20.04. With Jenkins, we can automate our CI/CD pipeline and improve our software development process by reducing time and effort involved in manual tasks. Jenkins is a powerful tool that every developer should have in their toolkit.

Jenkins Configuration and Setup

If you are new to Jenkins and want to learn about its installation process, this article will guide you through the necessary steps you need to take. Jenkins is an open-source automation tool widely used in the industry to perform continuous integration and continuous delivery tasks in a software development project. In this article, we will discuss how to configure and set up Jenkins for your specific needs.

Installation Pre-requisites

The installation process requires the following pre-requisites:

• Java Development Kit (JDK) should be installed in your system. Java 8 or newer version would suffice. If you don’t have Java installed, you can download it from their official website.
• Access to the command line console in your system.

Installation Steps

Following are the steps for Jenkins setup:

1. Download the latest version of Jenkins from its official website. You can download the .war file for Jenkins as it can be deployed on any application server.
2. Open the command line console and navigate to the directory where you downloaded the Jenkins .war file.
3. Type the command java -jar jenkins.war and press enter. This will start the Jenkins server.
4. The Jenkins server will now start, and you can access it through a web browser. Open your web browser and type localhost:8080 in the address bar. This will open the Jenkins web interface.
5. The first time you open the Jenkins web interface, it will ask you to enter a password. This password is necessary as it is used to secure your Jenkins installation. You can find the password in the location where the Jenkins server generates it.

Configuration Settings

Once you have successfully set up Jenkins, the next step is to configure it according to your requirements. You can configure Jenkins in many ways and can use different plugins to extend its functionality.

Managing Plugins

Jenkins provides many plugins to extend its functionality. To manage plugins in Jenkins, follow the steps below:

1. Open Jenkins web interface and click on the Manage Jenkins option from the dashboard.
2. In the next page, click on the Manage Plugins option.
3. You can install the plugins from the Available tab and update the plugins from the Updates tab.
4. After installing or updating the plugin, remember to restart the Jenkins server.

Creating Jobs

The primary functionality of Jenkins is to execute jobs, which can be automated scripts or tasks. To create a new job in Jenkins, follow these steps:

1. Open the Jenkins web interface and click on the New Item option from the dashboard.
2. Give your job a name and select the type of job that you want to create. Freestyle project is the most commonly used type of job in Jenkins.
3. Configure the job settings by specifying the build triggers, build steps, and post-build actions.
4. Save the job configuration, and Jenkins will automatically build the job based on the trigger you specified.

Integrating Jenkins with Other Tools

Jenkins provides integrations with many different tools like Git, GitHub, Docker, etc. You can integrate Jenkins with these tools by installing the respective plugins and configuring them. Follow the steps below to integrate Jenkins with Git:

1. Install the Git plugin from the Jenkins Manage Plugins option.
2. Configure the Git plugin with your Git credentials and repository URL.
3. Create a new job in Jenkins and configure the Git integration in the job settings.

Securing Jenkins

As Jenkins is an automation tool, it is essential to secure it from unauthorized access. Follow the steps below to secure your Jenkins installation:

1. Enable the Jenkins security by clicking on the Manage Jenkins option and selecting the Configure Global Security option.
2. Enable the Project-based Matrix Authorization Strategy and configure the users, groups, and permissions.
3. Create a new user and grant that user only the necessary permissions.
4. Configure the Jenkins CSRF Protection by enabling the relevant option.
5. Encrypt the Jenkins secrets to secure it.

That’s it! You have now learned how to set up Jenkins, configure it, and secure it from unauthorized access. With Jenkins, you can automate all the repetitive tasks in your software development process.