How to install SonarQube on CentOS 7

SONARQUBE

      SonarQube is an open source tool for quality system development. It is written in Java and supports multiple databases. It provides capabilities to continuously inspect the code, show the health of an application, and highlight newly introduced issues. It contains code analyzers which are equipped to detect tricky issues. It also integrates easily with DevOps.

PREREQUISITES

• User with sudo permission
• CentOS 7 server instance with at least 2 GB RAM

SYSTEM UPDATES

Before installing any packages in CentOS, it is recommended to update the system by running the following commands

• sudo yum -y install epel-release
• sudo yum -y update
• sudo shutdown -r now

Note: Make sure to get the latest version of Java, PostgreSQL, SonarQube and Sonar-Scanner

INSTALL JAVA

Make sure to get the latest JDK package. Download the SE JDK RPM package

wget --no-cookies --no-check-certificate --header "Cookie:oraclelicense=accept-securebackup-cookie" "http://download.oracle.com/otn-pub/java/jdk/8u131-b11/d54c1d3a095b4ff2b6607d096fa80163/jdk-8u131-linux-x64.rpm"

Install the downloaded package

sudo yum -y localinstall jdk-8u131-linux-x64.rpm

Check the version of Java

java -version

INSTALL AND CONFIGURE POSTGRESQL

Install PostgreSQL repo

sudo rpm -Uvh https://download.postgresql.org/pub/repos/yum/9.6/redhat/rhel-7-x86_64/pgdg- centos96-9.6-3.noarch.rpm

Install PostgreSQL db server

sudo yum -y install postgresql96-server postgresql96-contrib   

Initialize the database

sudo /usr/pgsql-9.6/bin/postgresql96-setup initdb

Edit the pg_hba.conf to enable MD5-based authentication

sudo nano /var/lib/pgsql/9.6/data/pg_hba.conf

In the pg_hba.conf  file, go to last section one table will be there, where you have to change the METHOD column from peer to trust and idnet to md5 respectively

After updating that file, the table configuration file looks like this

Start PostgreSQL server and enable it to start automatically at boot time

sudo systemctl start postgresql-9.6sudo systemctl enable postgresql-9.6

Change the password for the default PostgreSQL user

sudo passwd postgres

Switch to the Postgres user

su - postgres

Create a new user

createuser sonarqube

Switch to the PostgreSQL shell

psql

Set a password for the newly created user for SonarQube database

ALTER USER sonar WITH ENCRYPTED password ‘<New Password>’;

Create a new database for PostgreSQL database

CREATE DATABASE sonarqube OWNER sonarqube;

Exit from the psql shell

\q

Switch back to the sudo user by running the exit command

exit

DOWNLOAD AND CONFIGURE SONARQUBE SERVER

Click here and choose the latest sonarqube server

wget https://sonarsource.bintray.com/Distribution/sonarqube/sonarqube-6.4.zip

Unzip the SonarQube by (If you  don’t have zip package means, install it by sudo yum -y install unzip)

sudo unzip sonarqube-6.4.zip -d /opt

Rename the directory by

sudo mv /opt/sonarqube-6.4 /opt/sonarqube

Open the SonarQube configuration file using your nano text editor.

sudo nano /opt/sonarqube/conf/sonar.properties

Find the following lines

sonar.jdbc.username 

sonar.jdbc.password

Uncomment and give the PostgreSQL username and password of the database that we have created earlier

sonar.jdbc.username=sonarqube 

sonar.jdbc.password=<password>

And then find the

#sonar.jdbc.url      

Uncomment the line, save the file and exit from the editor.

CONFIGURE SYSTEMD SERVICE
Open the sonar.service file in your editor

 sudo nano /etc/systemd/system/sonar.service

Populate the file with

[Unit]

Description=SonarQube service

After=syslog.target network.target

[Service]

Type=forking

ExecStart=/opt/sonarqube/bin/linux-x86-64/sonar.sh start

ExecStop=/opt/sonarqube/bin/linux-x86-64/sonar.sh stop

User=root

Group=root

Restart=always

[Install]

WantedBy=multi-user.target

After updating that file, the file should  look like this

sonar.service

Start the application by

sudo systemctl start sonar

Enable the SonarQube service to automatically start at boot time

sudo systemctl enable sonar

Check the SonarQube service status

sudo systemctl status sonar

Likewise, you can stop or restart the service

sudo systemctl stop sonar 

sudo systemctl restart sonar

CONFIGURE FIREWALL
In order to allow the clients to access the SonarQube, you need to set inbound traffic on specified port

Syntax: sudo firewall-cmd --add-service=http --permanent <port number>/tcpeg: sudo firewall-cmd --zone=public --permanent --add-port=9000/tcp

After adding the port details in firewall, you must reload your firewall

sudo firewall-cmd –reload

Checking your port by

sudo firewall-cmd --list-ports

Start the sonar by

sudo systemctl start sonar

SonarQube is installed on your server, access the dashboard at the following address.

http://<your_ip:port_number>

Default port number of SonarQube is 9000

If you want to change the port number, change the sonar.web.port=9000 in sonar configuration file

Log in using the initial administrator account, admin and admin.

Reference: https://docs.sonarqube.org/display/SONAR/Installing+the+Server