# Two machines: one is the substrate, the other carries a lavinmq PROVIDER and a consumer of it. # # lavinmq is the mesh's own control-plane broker (mesh-broker), and it is ALSO offered as a # user-facing capability: a module that needs a message queue gets its OWN broker — a scoped vhost and # user on a lavinmq PROVIDER — not an account on the control broker. That makes lavinmq the sharp # two-node case, for the same reason two-node-db is: the substrate's broker publishes 5672 on the node # it runs on, and a lavinmq provider must publish 5672 too for its consumers to reach it — so the two # cannot share a machine. The moment a real amqp provider must own a node's 5672, it collides with the # control broker already there, and the chain is blocked single-node. # # This is the split that unblocks it. `anchor` runs the substrate (store, broker, control) and NOTHING # else. `laptop` runs the whole chain: the lavinmq PROVIDER and the amqp-ping CONSUMER that requires # it. Provider and consumer are co-located on laptop, so the grant never crosses a node boundary; only # enrolment crosses to anchor, over the underlay both machines share. And because the substrate broker # is on the OTHER node, the provider owns laptop's 5672 uncontested. # # It needs a host binary and the substrate bundle: # # MESH_LAB_HOST_BINARY=.../mesh-host MESH_LAB_BUNDLE=.../examples/substrate-first-node.lock # # HELPER — stock the two runtimes into the local daemon before the run (some may already be there): # scripts/build-module-runtime.sh lavinmq /tmp/lavinmq.tar # scripts/build-module-runtime.sh amqp-ping /tmp/amqp-ping.tar # The service image cloudamqp/lavinmq:latest must be in the local daemon too — it is already stocked as # the substrate's own broker image; each node pulls what it runs from the scenario's own registry by # digest. scenario: lavinmq-bed segments: hosting: kind: public cidr: [192.0.2.0/24] machines: anchor: at: { segment: hosting, address: [192.0.2.10] } inbound: allow memory: 3GiB cpus: 2 laptop: at: { segment: hosting, address: [192.0.2.11] } inbound: allow memory: 3GiB cpus: 2 images: # The first-node substrate: store, broker (itself lavinmq), control. - postgres:17-alpine - cloudamqp/lavinmq:latest - mesh-control:development # The lavinmq provider's runtime (reused for its run-once bootstrap and its provisioner) and the # amqp-ping consumer's runtime, both built by scripts/build-module-runtime.sh into the local daemon # and stocked into the scenario's own registry, which is where the hosts pull them from by digest. # The lavinmq SERVICE image is cloudamqp/lavinmq:latest, already stocked above. - mesh-runtime-lavinmq:development - mesh-runtime-amqp-ping:development place: all: [host, runtime]