System Requirements Guide

Cluster Sizing

The ESB3027 AgileTV CDN Manager requires a minimum of three machines for production deployment. While it’s possible to run the software on a single node in a lab environment, such an setup will not offer optimal performance or high availability.

A typical cluster comprises nodes assigned to either a Server or Agent role. Server nodes are responsible for running the control plane software, which manages the cluster, and they can also host application workloads if configured accordingly. Agent nodes, on the other hand, execute the application containers (workloads) but do not participate in the control plane or quorum. They serve to scale capacity as needed. See the Installation Guide for more information about the role types and responsibilities.

For high availability, it is essential to have an odd number of Server nodes. The minimum recommended is three, which allows the cluster to tolerate the loss of one server node. Increasing the Server nodes to five enhances resilience, enabling the cluster to withstand the loss of two server nodes. The critical factor is that more than half of the Server nodes are available; this quorum ensures the cluster remains operational. The loss of Agent nodes does not impact quorum, though workloads on failed nodes are automatically migrated if there is sufficient capacity.

Hardware Requirements

Single-Node Lab Cluster (Acceptance Testing)

For customer acceptance testing in a single-node lab environment, the following hardware is required. These requirements match the Lab Install Guide and are intended for non-production, single-node clusters only:

• Disk space should be available in the /var partition

Note: These requirements are for lab/acceptance testing only. For production workloads, see below.

Production Cluster (3 or More Nodes)

The following tables outline the minimum and recommended hardware specifications for different node roles within a production cluster. All disk space values refer to the available space on the /var/lib/longhorn partition. Additional capacity may be needed in other locations not specified here; it is advisable to follow the operating system vendor’s recommendations for those areas. For optimal performance, it is recommended to use SSDs or similar high-speed disks for Longhorn storage. Both virtual machines and bare-metal hardware are supported; however, hosting multiple nodes under a single hypervisor can impact performance.

Server Role - Control Plane only

• Disk space should be available in the /var partition

Agent Role

• Disk space should be available in the /var partition

Server Role - Control Plane + Workloads

• Disk space should be available in the /var partition

Operating System Requirements

We currently support RedHat Enterprise Linux or any compatible clone such as Oracle Linux, Alma Linux, etc., as long as the major version is listed as supported in the above table.

SELinux support will be installed if SELinux is “Enforcing” when installing the ESB3027 AgileTV CDN Manager cluster.

Networking Requirements

A minimum of 1 Network Interface Card must be present and configured as the default gateway on the node when the cluster is installed. If the node does not have an interface with the default route, a default route must be configured. See the Installation Guide for details.