About the Cloudera Manager Wizard
After you have installed the Cloudera Manager Server and when you run it for the first time, you can use the Cloudera Manager wizard to do the following on the cluster hosts automatically.
- Using SSH, discover the cluster hosts you specify via IP address ranges or hostnames
- Configure the parcel or package repositories for Cloudera Manager, CDH, Impala, and the Oracle JDK
- Install the Cloudera Manager Agent, CDH, and Impala on the cluster hosts
- Install the Oracle JDK (1.6) if it is not already installed on the cluster hosts. Cloudera Manager also supports JDK 1.7 if it is already installed on the cluster hosts.
- Determine mapping of services to hosts
- Suggest a Hadoop configuration and start the Hadoop services

- If you will use external databases, you must install and configure those databases before you start the wizard. These are the databases that will be used by Cloudera Manager, Service Monitor, Activity Monitor, Host Monitor, Report Manager, Cloudera Navigator, and the Hive Metastore. See Installing and Configuring Databases for more information. If you will use the embedded PostgreSQL database, you do not have to prepare databases in advance.
- When you install or upgrade Cloudera Manager and/or CDH using parcels, only the Cloudera Manager server host needs access to a remote parcel repository. The other cluster hosts only need access to the local repository (by default /opt/cloudera/parcels) on the Cloudera Manager server.
- When you use the Cloudera Manager Wizard to install or upgrade Cloudera Manager and/or CDH on your cluster hosts using packages, all of those hosts need access to installation files.
- Installation files are available on the Internet at archive.cloudera.com or you can download installation files and create a local repository. For more information, see the individual installation and upgrade procedures, and the Cloudera Manager Frequently Asked Questions .
You can choose to abort the Cloudera Manager Agent and CDH installation process and Cloudera Manager wizard will automatically revert and completely rollback the installation process for any uninstalled components. (Installation that has completed successfully on a given host is not rolled back on that host.)