Before You Begin a Trial Installation

Before you begin a trial installation, you must disable SELinux if you want the Cloudera Manager installer to run. You can also optionally configure an HTTP proxy.

(Optional) Configure an HTTP Proxy

The Cloudera Manager installer accesses archive.cloudera.com by using yum on RHEL systems. If your hosts access the Internet through an HTTP proxy, you can configure yum system-wide, to access archive.cloudera.com through a proxy.

To do so, modify the system configuration on every cluster host as follows:


OS	File	Property
RHEL-compatible	`/etc/yum.conf`	`proxy=http://server:port/`
Ubuntu	`/etc/apt/apt.conf`	`Acquire::http::Proxy "http://server:port";`

Disable SELinux

Although Cloudera supports running Cloudera software with SELinux enabled, the Cloudera Manager installer will not proceed if SELinux is enabled. Disable SELinux or set it to permissive mode before running the installer.

After you have installed and deployed Cloudera Manager and Runtime, you can re-enable SELinux by changing SELINUX=permissive back to SELINUX=enforcing in /etc/selinux/config (or /etc/sysconfig/selinux), and then running the following command to immediately switch to enforcing mode:

setenforce 1

If you are having trouble getting Cloudera Software working with SELinux, contact your OS vendor for support. Cloudera is not responsible for developing or supporting SELinux policies.