simpler check and deps messages

rig/ctrl/addons/metallb.sh

@@ -1,15 +1,7 @@
 #!/usr/bin/env bash
 # MetalLB — makes `Service type: LoadBalancer` actually get an address.
-#
-# Why it matters here: real manifests use LoadBalancer, because a real cluster
-# has one. On a bare kind cluster those Services sit at EXTERNAL-IP <pending>
-# forever with no error anywhere — the deployment looks fine and simply is not
-# reachable. Without this, every such Service has to be edited to NodePort,
-# which means the local manifests stop matching the ones being modelled.
-#
-# The address pool is derived from the kind Docker network at install time, not
-# hardcoded: Docker picks that subnet, it differs between machines, and a pool
-# outside it is silently unroutable.
+# The pool is derived from the kind Docker network at install time.
+# Notes: docs/notes/addons.md
 set -euo pipefail
 cd "$(dirname "$0")/.."
 
@@ -57,10 +49,7 @@ else
     $K apply -f "https://raw.githubusercontent.com/metallb/metallb/${METALLB_VERSION}/config/manifests/metallb-native.yaml"
 fi
 
-# `kubectl wait` on a selector errors out immediately when nothing matches yet,
-# and right after apply the ReplicaSet has not created the pod — so it loses a
-# race it looks like it should win. `rollout status` waits for the Deployment
-# itself and handles the not-yet-created case.
+# `rollout status`, not `kubectl wait`: wait errors out while the pod doesn't exist yet.
 echo "  waiting for the controller..."
 $K rollout status deployment/controller -n metallb-system --timeout=240s
 $K rollout status daemonset/speaker -n metallb-system --timeout=240s