See this page for more details about SonarQube: http://docs.sonarqube.org/display/SONAR/Documentation

Prerequisites:

• Install Apache Maven
• Install PostgreSQL Database
• Install Subversion

Download SonarQube (if the link is broken, please visit this page https://www.sonarqube.org/downloads/):
$ wget https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-7.9.1.zip
Extract the file "sonarqube-7.9.1.zip" in the folder you want to install SonarQube: /opt/sonarqube-7.9.1
$ unzip ~/Downloads/sonarqube-7.9.1.zip -d /opt/
Change the folder permissions:
$ sudo chmod -R 755 /opt/sonarqube-7.9.1/ $ sudo chown -R mtitek:mtitek /opt/sonarqube-7.9.1/
Create a symbolic link of the SonarQube installation folder:
$ sudo ln -s /opt/sonarqube-7.9.1/ /opt/sonarqube $ sudo chown -R mtitek:mtitek /opt/sonarqube

Add (or uncomment and modify) the following configuration in the "/opt/sonarqube/conf/sonar.properties" file:
$ vi /opt/sonarqube/conf/sonar.properties sonar.jdbc.username=sonar sonar.jdbc.password=sonar sonar.web.port=9000 sonar.search.port=9001 sonar.web.javaOpts=-Xmx512m -Xms128m -XX:+HeapDumpOnOutOfMemoryError sonar.log.rollingPolicy=time:yyyy-MM-dd sonar.log.maxFiles=7
SonarQube requires some settings to be configured properly. Please visit this page for more details https://docs.sonarqube.org/7.9/requirements/requirements/

Set JVM (Java 11) executable path:
$ vi /opt/sonarqube/conf/wrapper.conf wrapper.java.command=/opt/java11/bin/java
Edit "/etc/sysctl.conf" file:
$ sudo vi /etc/sysctl.conf vm.max_map_count=262144
Run "sysctl -p" to refresh the new configuration of the "/etc/sysctl.conf" file:
$ sudo sysctl -p
Increase the open files limit:
$ sudo vi /etc/security/limits.conf mtitek soft nofile 65536 mtitek hard nofile 65536
$ sudo vi /etc/systemd/user.conf DefaultLimitNOFILE=65536
$ sudo vi /etc/systemd/system.conf DefaultLimitNOFILE=65536
You might need to reboot your system so the open files limit configuration get applied.

Start SonarQube:
$ /opt/sonarqube/bin/linux-x86-64/sonar.sh start
Access the default page of SonarQube: http://localhost:9000/



To login to SonarQube, click the "Log in" file and enter:
Login: admin
Password: admin

Note that SonarQube is using an embedded database.

Other SonarQube commands:
Usage: /opt/sonarqube/bin/linux-x86-64/sonar.sh { console | start | stop | restart | status | dump }
Log directory: "/opt/sonarqube/logs/"

Please see this page for details on how to install and configure PostgreSQL: Install PostgreSQL Database

Stop SonarQube:
$ /opt/sonarqube/bin/linux-x86-64/sonar.sh stop
Create a PostgreSQL database named "sonar" and a user named "sonar":
CREATE ROLE sonar WITH LOGIN PASSWORD 'sonar'; CREATE DATABASE sonar OWNER sonar; GRANT ALL ON DATABASE sonar TO sonar;
Add or uncomment and modify the following configuration in the "/opt/sonarqube/conf/sonar.properties" file:
$ vi /opt/sonarqube/conf/sonar.properties sonar.jdbc.url=jdbc:postgresql://localhost/sonar
Start SonarQube:
$ /opt/sonarqube/bin/linux-x86-64/sonar.sh start
SonarQube will create the PostgreSQL schema:



Note that you might get an error, when starting SonarQube, complaining about a failure executing a migration step.
The issue is that SonarQube is failing to migrate an existing database so you might have to review the migration steps related to the version you want to upgrade.
But you can also see this error if you have already started SonarQube using the embedded database before configuring PostgreSQL, in this case, if you don't care about this embedded database, just delete the content of the folders "temp" and "data" (located under SonarQube installation home folder).
Make sure that SonarQube is not running before deleting the content of these folders.

Add the following configuration to the "~/.m2/settings.xml" file:
$ vi ~/.m2/settings.xml <profile> <id>sonar</id> <activation> <activeByDefault>true</activeByDefault> </activation> <properties> <sonar.host.url>http://localhost:9000</sonar.host.url> </properties> </profile>
Note that you might need to configure SonarQube and add SVN credentials needed when running Sonar analysis.
You can configure this by accessing this page on the SonarQube server: Administration -> Configuration -> SCM -> SVN
Enter the Username and Password (+ additional properties if required).
Please see this page for details on how to install and configure Subversion: Install Subversion

Create a local directory that will hold the maven project:
$ sudo mkdir /data/workspace $ sudo chmod -R 755 /data/workspace/ $ sudo chown -R mtitek:mtitek /data/workspace/
Run the following command "mvn archetype:generate" to create the maven project:
$ cd /data/workspace/ $ mvn archetype:generate \ -DarchetypeGroupId=org.apache.maven.archetypes \ -DarchetypeArtifactId=maven-archetype-quickstart \ -DarchetypeVersion=1.4 \ -DgroupId=mtitek.sonar.test \ -DartifactId=mtitek-sonar-test-a \ -Dpackage=mtitek.sonar.test \ -Dversion=1.0.0-SNAPSHOT \ -DinteractiveMode=false
Run SonarQube analysis:
$ cd /data/workspace/mtitek-sonar-test-a $ mvn sonar:sonar

Please note that the parameter "sonar.analysis.mode" was deprecated.
If you use this parameter you will get this error: The preview mode, along with the 'sonar.analysis.mode' parameter, is no more supported. You should stop using this parameter.

If you are using an old version of SonarQube (where the parameter "sonar.analysis.mode" is supported), you can run a local SonarQube analysis:
$ mvn sonar:sonar -Dsonar.analysis.mode=preview -Dsonar.issuesReport.html.enable=true ... [INFO] HTML Issues Report generated: /data/workspace/mtitek-svn-test-a/target/sonar/issues-report/issues-report.html [INFO] Light HTML Issues Report generated: /data/workspace/mtitek-svn-test-a/target/sonar/issues-report/issues-report-light.html ...
Open the two files "issues-report.html" and "issues-report-light.html" in a browser to see the SonarQube Issues Report.

Connect to the Administration page.
Click the "Log In" link and provide the login and password (login=admin, password=admin)

Click the "Administration" link.
Click the "Marketplace" link.



Select/search the plugin you want to install.
For example you may be interested in installing the following plugins:

• Checkstyle: Provide Checkstyle rules for Java projects
  
  
• Findbugs: Provide Findbugs rules for analysis of Java projects
  
  
• SonarXML: Enables scanning of XML files
  
  

Restart SonarQube to complete the installation of the plugins (you can restart it directly from the SonarQube UI).

You can find the installed plugins in this folder: "/opt/sonarqube/extensions/plugins/"