Layer 4 ingress provides TCP-level load balancing for services that require direct TCP connections. SystemLink Enterprise uses Layer 4 ingress for the Salt Master service.

Salt Master TCP Communication

SystemLink Enterprise uses Salt to manage test systems. Salt is infrastructure management software that communicates with test systems using a TCP-based protocol on ports 4505 and 4506. These ports require Layer 4 (TCP) ingress to enable communication between the Salt Master running in the Kubernetes cluster and the managed test systems.

Note Ports 4505 and 4506 must be accessible externally to the cluster. The SystemLink Client expects to connect to these specific ports. The client does not support mapping other port ranges to ports 4505 and 4506 on the pods.

Platform-Specific Configuration

The configuration for Layer 4 ingress varies depending on your Kubernetes platform and load balancing solution. Refer to the platform-specific guides in this section for detailed configuration instructions.