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Requirements for Guests
Sahara manages guests of various platforms (for example Ubuntu, Fedora, RHEL, and CentOS) with various versions of the Hadoop ecosystem projects installed. There are common requirements for all guests, and additional requirements based on the plugin that is used for cluster deployment.
Common Requirements
- The operating system must be Linux
- cloud-init must be installed
- ssh-server must be installed
- if a firewall is active it must allow connections on port 22 to enable ssh
Vanilla Plugin Requirements
If the Vanilla Plugin is used for cluster deployment the guest is required to have
- ssh-client installed
- Java (version >= 6)
- Apache Hadoop installed
- 'hadoop' user created
See hadoop-swift for
information on using Swift with your Sahara cluster (for EDP support
Swift integration is currently required).
To support EDP, the following components must also be installed on the guest:
- Oozie version 4 or higher
- mysql
- hive
See diskimagebuilder
for instructions on building images for this plugin.
HDP Plugin
This plugin does not have any additional requirements. Currently, only the CentOS Linux distribution is supported but other distributions will be supported in the future. To speed up provisioning, the HDP packages can be pre-installed on the image used. The packages' versions depend on the HDP version being used.
Cloudera Plugin Requirements
If the Cloudera Plugin is used for cluster deployment the guest is required to have
- Cloudera Express installed
See cdh_imagebuilder
for instructions on building images for this plugin.