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    JNDI configuration and encryption

    JNDI DB Datasource

    JNDI datasource troubleshooting

    Encrypted JNDI
    JNDI DB datasource

    CloverDX Server can connect to a database using JNDI Datasource which is configured in an application server.

    Worker JNDI Configuration

    Note that the following configuration applies to Server Core only. Graphs running in Worker cannot use JNDI as defined in the application container of the Server Core, because Worker is a separate JVM process. Worker provides its own JNDI configuration.
    Example for Apache Tomcat and PostgreSQL database:

    • JNDI Datasource Definition

      First you need to define a JNDI Datasource in an application server. The following context resource configuration may be added to the [Tomcat_home]/conf/server.xml file to the <Host> element.

      Note: Do not put the code into the <GlobalNamingResources> element, since the resource would not be visible by the CloverDX webapp.

      <Context path="/clover">
  <Resource name="jdbc/clover_server"
            auth="Container"
            type="javax.sql.DataSource"
            factory="org.apache.tomcat.jdbc.pool.DataSourceFactory"
            driverClassName="org.postgresql.Driver"
            url="jdbc:postgresql://127.0.0.1:5432/clover_db"
            username="clover"
            password=""
            maxTotal="20"
            maxIdle="10"
            maxWaitMillis="-1"/>
</Context>

    • JNDI Connection Configuration

      Now that the Datasource is defined, you should configure the connection.

      The following parameters may be set in the same way as other parameters (in the properties file or the Tomcat context file). You can also set the parameters in the Database tab of the Setup GUI.

      # The type of Datasource; must be set, because the default value is JDBC. #
datasource.type=JNDI
# JNDI location of DB Datasource; the default value is java:comp/env/jdbc/clover_server #
datasource.jndiName=java:comp/env/jdbc/clover_server
# Set the dialect according to DB which DataSource is connected to. #
# The correct dialect can be found in the examples of DB configuration. #
jdbc.dialect=org.hibernate.dialect.PostgreSQLDialect

      Since the DB connection contains sensitive information (e.g. username, password, etc.), CloverDX provides the JNDI Encryption feature.

    The resource configuration may also be added to the context file [Tomcat_home]/conf/Catalina/localhost/clover.xml.

    Special characters typed in the context file have to be specified as XML entities, e.g. ampersand "&" as "&amp;", etc.

    For a detailed list of parameters which can be set up in the configuration file, see List of configuration properties.

    JNDI datasource troubleshooting
    JNDI and SQL query metadata on worker

    When using JNDI and SQL query metadata, JNDI must be configured on both Server Core and Worker. Otherwise, the Cannot open DB connection from JNDI data source error will occur.

    Apache Tomcat’s DBCP JNDI pool

    The default JNDI pool DBCP in Apache Tomcat does not handle connections efficiently. With the DBCP JNDI pool, low performance can be seen if DatabaseWriter with returning statement is used.

    Therefore, tomcat-jdbc-pool is used instead by adding the factory="org.apache.tomcat.jdbc.pool.DataSourceFactory" attribute to the definition of the JNDI resource. See The Tomcat JDBC Connection Pool

    Encrypted JNDI

    The encryption feature allows you to protect your sensitive data defined in the Datasource definition (e.g. username, password, etc.), which are by default stored in plain text. The configuration differs between particular application servers.

    Encrypted JNDI on Tomcat
    Encrypted JNDI on Tomcat

    You need secure-cfg-tool to encrypt the passwords. Use the version of secure-cfg-tool corresponding to the version of CloverDX Server. Usage of the tool is described in Secure Configuration Properties.

    Use encrypt.sh or encrypt.bat for password encryption. Place the encrypted password into a configuration file, and put cloverdx-secure-jndi-resource-{version}.jar and jasypt-1.9.0.jar files on the classpath of the application server. The .jar files can be found in the tomcat-secure-jndi-resource directory packed in secure-cfg-tool.

    The tomcat-secure-jndi-resource directory contains a useful README file with further details on encrypted JNDI.

    Example of encrypted JNDI connection for PostgreSQL

    Encrypt the password:

    1. ./encrypt.sh -a PBEWithSHA1AndDESede

    2. The configuration is placed in ${CATALINA_HOME}/conf/context.xml. Note that the encryption algorithm PBEWithSHA1AndDESede is not default.

      <Resource name="jdbc/clover_server"
          auth="Container"
          factory="com.cloveretl.secure.tomcatresource.Tomcat8SecureDataSourceFactory"
          secureAlgorithm="PBEWithSHA1AndDESede"
          type="javax.sql.DataSource"
          driverClassName="org.postgresql.Driver"
          url="jdbc:postgresql://127.0.0.1:5432/clover_db?charSet=UTF-8"
          username="conf#rPz5Foo7HPn4dFTRV5Ourg=="
          password="conf#4KlNp8/FVDR+rTWX0dEqWA=="
          maxTotal="20"
          maxIdle="10"
          maxWaitMillis="-1"/>

      If you use other JCE (e.g. Bouncy Castle), it has to be added to the classpath of the application server (${CATALINA_HOME}/lib). The encrypt command requires the path to directory with JCE, too.

      ./encrypt.sh -l ~/lib/ -c org.bouncycastle.jce.provider.BouncyCastleProvider -a PBEWITHSHA256AND256BITAES-CBC-BC

      <Resource name="jdbc/clover_server"
          auth="Container"
          factory="com.cloveretl.secure.tomcatresource.Tomcat8SecureDataSourceFactory"
          secureProvider="org.bouncycastle.jce.provider.BouncyCastleProvider"
          secureAlgorithm="PBEWITHSHA256AND256BITAES-CBC-BC"
          type="javax.sql.DataSource"
          driverClassName="org.postgresql.Driver"
          url="jdbc:postgresql://127.0.0.1:5432/clover_db?charSet=UTF-8"
          username="conf#Ws9IuHKo9h7hMjPllr31VxdI1A9LKIaYfGEUmLet9rA="
          password="conf#Cj1v59Z5nCBHaktn6Ubgst4Iz69JLQ/q6/32Xwr/IEE="
          maxTotal="20" maxIdle="10"
          maxWaitMillis="-1"/>

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