Lightbits Cluster Topology
The following is a basic diagram that shows the components and resources required to automatically install Lightbits software onto your servers in your data center.
Based on the numbers next to each component or resource, see the following table for a description of the components and resources in the Lightbits cluster topology diagram.
Lightbits Cluster Topology Components Table
| # | Component or Resource | Description |
|---|---|---|
| 1 | lightbitslabs.com | Lightbits supplied configuration files and installation tools via “FTP” from our website. |
| 2 | dl.lightbitslabs.com | The Lightbits software is maintained in a password-protected software repository, referred to as “The Lightbits Repo”. |
| 3 | Preferred Linux repo.org | There are many publicly-available Linux repositories that are already configured in your environment. Some standard tools might need to be downloaded from these repos or updated Linux kernel files to allow your clients to perform NVMe/TCP functions. These standard files are not available from Lightbits but are part of your core operating system. |
| 4 | Public Network Time Protocol Server | Lightbits cluster nodes remain in sync using NTP. This is automatically configured by the Ansible installation script. However a custom NTP configuration is possible. |
| 5 | Management Network | To connect and configure a given server, the standard Secure Shell (SSH) protocol is used. Each server must be reachable and is configured over this management network. This network is separate from the network that Lightbits will send and receive application data over. It is also possible to use the same network for both Management and Data Networks. |
| 6 | Data Network | Acts as the interconnection between the enterprise’s “Clients” or “Application Servers”. This is a separate network from the Management Network and carries all of the NVMe/TCP data traffic. |
| 7 | Cluster Installation Workstation | This is where you download the Lightbits installation software. This is composed of an Ansible script and must be outside of the planned cluster. It will automatically download the Lightbits cluster software files from the dl.lightbitslabs.com repo to each of the Lightbits cluster servers. Note: For information about the system requirements for the installation workstation, see General System Requirements in the Lightbits Installation Guide. |
| 8 | Lightbits Cluster Servers | The cluster servers store the application data. Each node is what essentially makes up the data storage portion of a Lightbits cluster. All of the RPM files (from dl.lightbitslabs.com) are installed on these servers. |
| 9 | Clients | These are the enterprise’s application servers and are where your applications live. The “client” part of the cluster is connected to the Lightbits cluster via the data network. It might be necessary for you to update the client “kernel” using a standard repo manager program such as “yum” in the case of CentOS or RHEL. |
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