How to install/Configure Jenkins and Maven on CentOS 7 or RHEL 7

Install Jenkins

Step1: Before starting, Login to your Linux server and update it. Also install required utilities and JDK

sudo yum update -y

sudo yum install wget -y

sudo yum install java-1.8.0-openjdk.x86_64 -y

Step2: To install Jenkins, First you need to create Jenkins Repository as Jenkins package is not available in the default CentOS and RHEL repositories.

sudo wget -O /etc/yum.repos.d/jenkins.repo http://pkg.jenkins-ci.org/redhat/jenkins.repo

sudo rpm --import https://jenkins-ci.org/redhat/jenkins-ci.org.key

Step3: Once local repository is setup , you can install jenkins

sudo yum install jenkins

Step4: Start and Enable Jenkins Service

sudo service jenkins start

sudo chkconfig jenkins on

sudo service jenkins status

● jenkins.service - LSB: Jenkins Automation Server

   Loaded: loaded (/etc/rc.d/init.d/jenkins; bad; vendor preset: disabled)

   Active: active (running) since Sun 2020-03-22 11:28:21 UTC; 2 months 14 days ago

     Docs: man:systemd-sysv-generator(8)

   CGroup: /system.slice/jenkins.service

           └─6403 /etc/alternatives/java -Dcom.sun.akuma.Daemon=daemonized -Djava.awt.headless=true -DJENKINS_..

Step5: Open the ports 8080 in OS firewall.

sudo firewall-cmd --permanent --new-service=jenkins

sudo firewall-cmd --permanent --service=jenkins --set-short="Jenkins Service Ports"

sudo firewall-cmd --permanent --service=jenkins --set-description="Jenkins service firewalld port exceptions"

sudo firewall-cmd --permanent --service=jenkins --add-port=8080/tcp

sudo firewall-cmd --permanent --add-service=jenkins

sudo firewall-cmd --zone=public --add-service=http --permanent

sudo firewall-cmd --reload

Step6: Access the Jenkins Web portal

Access the URL: http://<Ip-Address-of-your-Server>:8080

Password location: /var/lib/jenkins/secrets/initialAdminPassword

In the next windows Select the option : Install suggested plugins

Once it is done with plugin installation. It will ask to create Admin User

Below command will stop the jenkins service, similarly if you face any issue you can also restart it.

sudo service jenkins stop/restart

Install Apache Maven

Step1: Download Apache Maven installer from its official website and extract it to /opt/maven

cd /opt

wget https://www-eu.apache.org/dist/maven/maven-3/3.6.3/binaries/apache-maven-3.6.3-bin.tar.gz

sudo tar xzf apache-maven-3.6.3-bin.tar.gz

sudo ln -s apache-maven-3.6.3 maven

Step2: As you have downloaded precompiled Apache Maven files on your system. Now set the environments variables by creating new file /etc/profile.d/maven.sh.

sudo vi /etc/profile.d/maven.sh

export M2_HOME=/opt/maven

export PATH=${M2_HOME}/bin:${PATH}

source /etc/profile.d/maven.sh

Step3: Apache Maven has been successfully configured on your system. Use the following command to check the version of installed Maven on your system.

mvn –version

Apache Maven 3.6.1 (d66c9c0b3152b2e69ee9bac180bb8fcc8e6af555; 2019-04-04T19:00:29Z)

Maven home: /opt/maven

Java version: 1.8.0_201, vendor: Oracle Corporation, runtime: /usr/java/jdk1.8.0_201-amd64/jre

Default locale: en_US, platform encoding: UTF-8

OS name: "linux", version: "3.10.0-1062.9.1.el7.x86_64", arch: "amd64", family: "unix"

Configuring Java and Maven in Jenkins

To configure Java, provide a Name and the JAVA_HOME path, or check Install automatically checkbox:

To configure Maven in the Global Tool Configuration section, provide the Name and MAVEN_HOME path, or check Install automatically checkbox if it is not installed already.

To install and configure nexus server you can refer here.