added some comments and refactored idempotency

kind-with-registry.sh

@@ -5,37 +5,47 @@ export PATH=$PATH:$(go env GOPATH)/bin
 reg_name="kind-registry"
 reg_port="5001"
 
+# Build utility image if it doesn't already exist
+if [ "$(podman image list --format='{{.Repository}}:{{.Tag}}' 2>/dev/null | cut -d/ -f2 | tr '[:upper:]' '[:lower:]' | egrep 'utility:latest')" != 'utility:latest' ]; then
+       	podman build -t utility .
+fi
+
+# Deploy local registry container
 if [ "$(podman inspect -f '{{.State.Running}}' ${reg_name} 2>/dev/null || true)" != 'true' ]; then
 	podman run -d -p "127.0.0.1:${reg_port}:5000" --name "${reg_name}" registry:2
 fi
 
-kind get clusters -q | egrep '^ek-demo$' >/dev/null || cat <<EOF | kind create cluster -n ek-demo --image kindest/node:v1.24.15 --kubeconfig .kube/config --config=-
-kind: Cluster
-apiVersion: kind.x-k8s.io/v1alpha4
-containerdConfigPatches:
-- |-
-  [plugins."io.containerd.grpc.v1.cri".registry]
-    config_path = "/etc/containerd/certs.d"
-nodes:
-- role: control-plane
-  kubeadmConfigPatches:
-  - |
-    kind: InitConfiguration
-    nodeRegistration:
-      kubeletExtraArgs:
-        node-labels: "ingress-ready=true"
-  extraPortMappings:
-  - containerPort: 80
-    hostPort: 80
-    protocol: TCP
-  - containerPort: 443
-    hostPort: 443
-    protocol: TCP
-- role: worker
-- role: worker
-- role: worker
-EOF
+# Create cluster, with ingress and registry patches
+if [ ! "$(kind get clusters -q | egrep '^ek-demo$' >/dev/nulli)" ]; then
+	cat <<-EOF | kind create cluster -n ek-demo --image kindest/node:v1.24.15 --kubeconfig .kube/config --config=-
+	kind: Cluster
+	apiVersion: kind.x-k8s.io/v1alpha4
+	containerdConfigPatches:
+	- |-
+	  [plugins."io.containerd.grpc.v1.cri".registry]
+	    config_path = "/etc/containerd/certs.d"
+	nodes:
+	- role: control-plane
+	  kubeadmConfigPatches:
+	  - |
+	    kind: InitConfiguration
+	    nodeRegistration:
+	      kubeletExtraArgs:
+	        node-labels: "ingress-ready=true"
+	  extraPortMappings:
+	  - containerPort: 80
+	    hostPort: 80
+	    protocol: TCP
+	  - containerPort: 443
+	    hostPort: 443
+	    protocol: TCP
+	- role: worker
+	- role: worker
+	- role: worker
+	EOF
+fi
 
+# Add registry to each node
 REGISTRY_DIR="/etc/containerd/certs.d/localhost:${reg_port}"
 for node in $(kind get nodes -q --name staticweb); do
   podman exec "${node}" mkdir -p "${REGISTRY_DIR}"

kind.yaml

@@ -1,7 +0,0 @@
-kind: Cluster
-apiVersion: kind.x-k8s.io/v1alpha4
-nodes:
-- role: control-plane
-- role: worker
-- role: worker
-- role: worker