patterns / 1 · normal setup

Baseline

One EC2, relay-pull from the IPort, clients on the NLB. Prove it streams before you add HA.

Next: Dual-AZ Patterns
Baseline relay IPort Baseline / relay_iport one caster / one AZ / normal setup Receiver IPort :8857 NtripCaster EC2 / :2101 relay pull NLB TCP :2101 NTRIP clients GET /MOUNT TCP raw

Destroy this stack before dual-AZ — separate state, double the bill if both stay up.

Deploy 

cd examples/relay_iport
cp terraform.tfvars.example terraform.tfvars
# vpc_id, private_subnet_id, nlb_subnet_ids, field_sources, passwords
terraform init && terraform apply
terraform output   # dial NLB :2101

If clients never get a mount, stop here. HA will not fix a bad baseline.

Explain

Same modules/caster the HA chapters reuse. One process — host loss means the stream is down until you replace it.

Teardown 

cd examples/relay_iport && terraform destroy

Leave field VPCs and hosted zones alone.

Dual-AZ Shared NLB HA