Do I need sonar and sonar runner for Jenkins?
If you want to analyse a project with SonarQube and Jenkins, here's what you need:
A SonarQube server up and running
A Jenkins server up and running with the SonarQube Scanner for Jenkins installed and configure to point to your SonarQube server
A job configured to run a SonarQube analysis on your project:
Using the default and standard SonarQube Scanner (suitable for most projects)
Using the SonarQube Scanner for MSBuild (for .NET solutions)
Using a post build action for Maven-based projects
Everything is described more in details on the SonarQube Scanner for Jenkins documentation page.