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Description / Features

This plugin allows the delegation of SonarQube authentication and authorization to Atlassian Crowd.

The main features are:

  • Password checking against the external authentication engine.
  • Automatic synchronization of usernames and emails.
  • Automatic synchronization of relationships between users and groups (authorization).
  • Ability to authenticate against both the external and the internal authentication systems (for instance, technical SonarQube user accounts do not need to be defined in Crowd as there is an automatic fallback on SonarQube engine if the user is not defined in Crowd or if the Crowd server is down).

During the first authentication trial, if the password is correct, the SonarQube database is automatically populated with the new user. Each time a user logs into SonarQube, the username, the email and the groups this user belongs to that are refreshed in the SonarQube database.










2.0.2 - 2.2.x

2.1.0 - 2.8.x


  1. Install the plugin through the Update Center or download it into the SONARQUBE_HOME/extensions/plugins directory
  2. Restart the SonarQube server


  1. Configure the Crowd plugin by editing the SONARQUBE_HOME/conf/ file (see table below)

  2. Restart the SonarQube server and check the log file for:

    INFO  web[org.sonar.INFO]  Security realm: Crowd
    INFO  web[o.s.p.c.CrowdRealm]  Crowd configuration is valid, connection test successful.
    INFO  web[org.sonar.INFO]  Security realm started
  3. Log in to SonarQube

General Configuration

Default value

To first try to authenticate against the external sytem. If the external system is not reachable or if the user is not defined in the external system, the authentication will be performed through the SonarQube internal system.

Available since SonarQube 3.6. It replaces the property sonar.authenticator.class usage.



Crowd (only possible value)
To save the user password in the SonarQube database. Then, users will be able to log into SonarQube even when the Crowd server is not reachable.

By default, the SonarQube database is automatically populated when a new user logs into SonarQube. Setting this value to false, makes it mandatory for a System administrator to first declare a user through the SonarQube web interface before allowing this user to log into SonarQube.


If set to true, at each login, user's attributes (name and email) are re-synchronized. If set to false, user's attributes are not re-synchronized.

Note that if set to false, user's attributes are synchronized just once, at the very first login.

Available since SonarQube 3.6.

sonar.authenticator.downcaseSet to true when connecting to a Crowd server using a case-insensitive setup.falseNo 
URL of the Crowd server. Note that if you are using https with a self certified certificate, then you should install the server certificate into the Java truststore. Since version 2.0 of the plugin the url must be the root URL of your crowd instance and not the /services/ endpoint like for previous versions of the plugin.None

Application name defined in Crowd to authenticate your sonar instance.NoneNosonar
Application password defined in Crowd to authenticate your sonar instance.NoneNo 

Example of CROWD Configuration



Advanced Configuration

Technical Users

Since SonarQube 4.2, technical users can be set. Technical users are authenticated against SonarQube's own database of users, rather than against any external tool (LDAP, Active Directory, Crowd, etc.).

Similarly, all accounts not flagged as local will be authenticated only against the external tool. By default admin is a technical account. Technical accounts are configured in SONARQUBE_HOME/conf/ in the (default value = admin) property as a comma-separated list.


to SonarQube 5.0

  • Only crowd plugin 2.0+ supports SonarQube 5.0+
  • must be used instead of sonar.authenticator.class (deprecated since SonarQube 3.6 and removed in SonarQube 5.0)

from Crowd plugin 1.0 to 2.0

  • Crowd plugin 2.0+ uses the REST API provided by Crowd. The crowd url used in the configuration (crowd.url) must be the main URL of your crowd instance and not its /services/ end point (used with the previous SOAP integration)
  • Crowd plugin 2.0+ synchronises groups from Crowd thus take care to create a group sonar-administrators in your Crowd directory and add in this group all users you'll want to use to administer SonarQube. You can also define some accounts to not synchronise with the property

Deprecated Crowd plugin 1.0 configuration

  1. Make sure that at least one user with System administration role exists in SonarQube as well as in the external system
  2. Update the SONARQUBE_HOME/conf/ file by adding the following lines:

  3. Restart the SonarQube server and check the log file for:

    INFO  org.sonar.INFO  Authentication plugin: class org.sonar.plugins.crowd.CrowdAuthenticator
    INFO  org.sonar.INFO  Authentication plugin started
  4. Log in to SonarQube



For versions prior to SonarQube 4.1, you can enable debug logging by adding the following to conf/logback.xml: