How To Install Jenkins on CentOS 7

深碍√TFBOYSˉ_ 2024-03-27 10:05 25阅读 0赞

[Jenkins][] is an open source, Java-based automation server that offers an easy way to set up a continuous integration and continuous delivery (CI/CD) pipeline.

Continuous integration (CI) is a DevOps practice in which team members regularly commits their code changes to the version control repository, after which automated builds and tests are run. Continuous delivery (CD) is a series of practices where code changes are automatically built, tested and deployed to production.

This tutorial will walk you through the steps of installing Jenkins on a CentOS 7 system using the official Jenkins repository.

### [Prerequisites][] ###

Before continuing with this tutorial, make sure you are logged in as a [user with sudo privileges][].

### [Installing Jenkins][] ###

To install Jenkins on your CentOS system, follow the steps below:

1.  Jenkins is a Java application, so the first step is to install Java. Run the following command to install the OpenJDK 8 package:
    
    \`\`\`
    
        ```console-bash
          sudo yum install java-1.8.0-openjdk-devel
          ```
          ```
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-001.png)
    
    \`\`\`
    
        ```console-bash
          curl --silent --location http://pkg.jenkins-ci.org/redhat-stable/jenkins.repo | sudo tee /etc/yum.repos.d/jenkins.repo
          ```
          ```
        
        
          ![](http://winjay.cn/wp-content/uploads/1012-002.png) And add the repository to your system with:
    
    \`\`\`
    
        ```console-bash
          sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key
          ```
          ```
        
        
          ![](http://winjay.cn/wp-content/uploads/1012-003.png)
    
    3. Once the repository is enabled, install the latest stable version of Jenkins by typing:
    
    \`\`\`
    
        ```console-bash
          sudo yum install jenkins
          ```
          ```
        
        
          ![](http://winjay.cn/wp-content/uploads/1012-004.png)
    
    After the installation process is completed, start the Jenkins service with:
    
    \`\`\`
    
        ```console-bash
          sudo systemctl start jenkins
          ```
          ```
    
    To check whether it started successfully run:
    
    \`\`\`
    
        ```console-bash
          systemctl status jenkins
          ```
          ```
    
    You should see something similar to this:
    
    \`\`\`
    
        ```output>
          " data-lang="output>" style="box-sizing: inherit; border: 0px solid #dae1e7; font-family: Menlo, Monaco, Consolas, 'Liberation Mono', 'Courier New', monospace; font-size: 0.875rem; min-width: 0px; background-color: #f1f5f8; padding: 0px;">● jenkins.service - LSB: Jenkins Automation Server
             Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)
             Active: active (running) since Fri 2018-11-02 13:37:46 CST; 34s ago
               Docs: man:systemd-sysv-generator(8)
             CGroup: /system.slice/jenkins.service
                     └─12688 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_HOME=/var/lib/jenkins -jar /usr/lib/jenkins/jenkins.war --.● jenkins.service - LSB: Jenkins Automation Server
        
          
        
          ```Finally enable the Jenkins service to start on system boot.
        
          ```
    
    \`\`\`
    
        ```console-bash
          sudo systemctl enable jenkins
          ```
          ```
    
    \`\`\`
    
        ```output
          jenkins.service is not a native service, redirecting to /sbin/chkconfig.
          Executing /sbin/chkconfig jenkins on
          ```
          ```
        
        
          ![](http://winjay.cn/wp-content/uploads/1012-005.png)
    
    \[Adjust the Firewall\](https://linuxize.com/post/how-to-install-jenkins-on-centos-7/\#adjust-the-firewall) -------------------------------------------------------------------------------------------------------- If you are installing Jenkins on a remote CentOS server that is \[protected by a firewall\](https://linuxize.com/post/how-to-setup-a-firewall-with-firewalld-on-centos-7/) you need to port \`8080\`. Use the following commands to open the necessary port:
    
    \`\`\`
    
        ```console-bash
        sudo firewall-cmd --permanent --zone=public --add-port=8080/tcp
        sudo firewall-cmd --reload
        ```
        ```
        
        
        ![](http://winjay.cn/wp-content/uploads/1012-006.png)
    
    \`\`\`
    
        ```url
        http://your_ip_or_domain:8080
        ```
        ```
    
    A screen similar to the following will appear, prompting you to enter the Administrator password that is created during the installation:
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-007.png)
    
    Use the following command to print the password on your terminal:
    
    \`\`\`
    
        [root@Jenkins ~]# cat /var/lib/jenkins/secrets/initialAdminPassword 
        4665d7d605744391a1712026cc3e636e
        ```
    
    Copy the password from your terminal, paste it into the Administrator password field and click \`Continue\`.
    
    !\[\](https://linuxize.com/post/how-to-install-jenkins-on-centos-7/customize-jenkins.jpg)
    
    On the next screen you will be asked whether you want to install the suggested plugins or to select specific plugins. Click on the \`Install suggested plugins\` box, and the installation process will start immediately.
    
    !\[\](https://linuxize.com/post/how-to-install-jenkins-on-centos-7/jenkins-getting-started.jpg)
    
    Once the installation is complete, you will be prompted to set up the first administrative user. Fill out all required information and click \`Save and Continue\`.
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-010.png)
    
    On the next page you will be asked to set the URL for the Jenkins instance. The URL filed will be populated with an automatically generated URL.
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-011.png)
    
    To complete the setup confirm the URL by clicking on the \`Save and Finish\` button.
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-012.png)
    
    Finally, click on the \`Start using Jenkins\` button and you will be redirected to the Jenkins dashboard logged in as the admin user you have created in one of the previous steps.
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-013.png)
    
    !\[\](http://winjay.cn/wp-content/uploads/1012-014.png)
    
    If you’ve reached this point, you’ve successfully installed Jenkins on your CentOS system. \[Conclusion\](https://linuxize.com/post/how-to-install-jenkins-on-centos-7/\#conclusion) -------------------------------------------------------------------------------------- In this tutorial, you have learned how to install and complete the initial configuration of Jenkins on CentOS/RHEL based systems. You can now visit the official \[Jenkins documentation\](https://jenkins.io/doc/) page and start exploring Jenkins’s workflow and plug-in model. If you have any question, please leave a comment below.

[Jenkins]: https://jenkins.io/
[Prerequisites]: https://linuxize.com/post/how-to-install-jenkins-on-centos-7/#prerequisites
[user with sudo privileges]: https://linuxize.com/post/create-a-sudo-user-on-centos/
[Installing Jenkins]: https://linuxize.com/post/how-to-install-jenkins-on-centos-7/#installing-jenkins