(Optional) Configure an HTTP Proxy

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

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

Disable SELinux

  Note: Cloudera Enterprise, with the exception of Cloudera Navigator Encrypt, is supported on platforms with Security-Enhanced Linux (SELinux) enabled and in enforcing mode. Cloudera is not responsible for SELinux policy development, support, or enforcement. If you experience issues running Cloudera software with SELinux enabled, contact your OS provider for assistance.

If you are using SELinux in enforcing mode, Cloudera Support can request that you disable SELinux or change the mode to permissive to rule out SELinux as a factor when investigating reported issues.

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. For instructions, see Setting SELinux mode.

After you have installed and deployed Cloudera Manager and CDH, 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.