https://docs.sonarqube.org/display/SCAN/Analyzing+with+SonarQube+Scanner+for+Maven


-------------------
settings.xml in Maven

<settings>
    <pluginGroups>
        <pluginGroup>org.sonarsource.scanner.maven</pluginGroup>
    </pluginGroups>
    <profiles>
        <profile>
            <id>sonar</id>
            <activation>
                <activeByDefault>true</activeByDefault>
            </activation>
            <properties>
                <!-- Optional URL to server. Default value is http://localhost:9000 -->
                <sonar.host.url>
                  http://myserver:9000
                </sonar.host.url>
            </properties>
        </profile>
     </profiles>
</settings>


explicit call with maven:

->>
mvn clean verify sonar:sonar
 
# In some situation you may want to run sonar:sonar goal as a dedicated step. Be sure to use install as first step for multi-module projects
mvn clean install
mvn sonar:sonar