Conga - Red Hat Cluster for Enterprise Linux 5 Configuration

In addition, information about using Conga and
sequent chapters of this document. Information about the command line tools is available in the
man pages for the tools.

2. Conga

Conga is an integrated set of software components that provides centralized configuration and
management of Red Hat clusters and storage. Conga provides the following major features:
• One Web interface for managing cluster and storage
• Automated Deployment of Cluster Data and Supporting Packages
• Easy Integration with Existing Clusters
• No Need to Re-Authenticate
• Integration of Cluster Status and Logs
• Fine-Grained Control over User Permissions
The primary components in Conga are luci and ricci, which are separately installable. luci is a
server that runs on one computer and communicates with multiple clusters and computers via
ricci. ricci is an agent that runs on each computer (either a cluster member or a standalone
computer) managed by Conga.
luci is accessible through a Web browser and provides three major functions that are access-
ible through the following tabs:
• homebase — Provides tools for adding and deleting computers, adding and deleting users,
and configuring user privileges. Only a system administrator is allowed to access this tab.
• cluster — Provides tools for creating and configuring clusters. Each instance of luci lists
clusters that have been set up with that luci. A system administrator can administer all
clusters listed on this tab. Other users can administer only clusters that the user has permis-
sion to manage (granted by an administrator).
• storage — Provides tools for remote administration of storage. With the tools on this tab,
you can manage storage on computers whether they belong to a cluster or not.
To administer a cluster or storage, an administrator adds (or registers) a cluster or a computer
to a luci server. When a cluster or a computer is registered with luci, the FQDN hostname or IP
address of each computer is stored in a luci database.
You can populate the database of one luci instance from another luciinstance. That capability
provides a means of replicating a luci server instance and provides an efficient upgrade and
testing path. When you install an instance of luci, its database is empty. However, you can im-
port part or all of a luci database from an existing luci server when deploying a new luci server.
Each luci instance has one user at initial installation — admin. Only the admin user may add
systems to a luci server. Also, the admin user can create additional user accounts and determ-
2. Conga
system-config-cluster
4
is provided in sub-