big update based on real wokr

rig/examples/data/addons/redis.sh

@@ -2,6 +2,7 @@
 # Redis for this overlay: cache and broker (Celery), no persistence.
 # Notes: ../README.md
 set -euo pipefail
+ADDON_DIR="$(cd "$(dirname "$0")" && pwd)"   # its manifest sits beside it
 cd "${RIG_CTRL:?run it through rig: bash ctrl/addons.sh install}"
 
 source ./lib/config.sh
@@ -13,43 +14,7 @@ NS="${DATA_NAMESPACE:-data}"
 $K get namespace "$NS" >/dev/null 2>&1 || $K create namespace "$NS"
 
 echo "  applying manifests"
-$K apply -n "$NS" -f - >/dev/null <<YAML
-apiVersion: v1
-kind: Service
-metadata:
-  name: redis
-spec:
-  selector:
-    app: redis
-  ports:
-    - port: 6379
-      targetPort: 6379
----
-apiVersion: apps/v1
-kind: Deployment
-metadata:
-  name: redis
-spec:
-  replicas: 1
-  selector:
-    matchLabels:
-      app: redis
-  template:
-    metadata:
-      labels:
-        app: redis
-    spec:
-      containers:
-        - name: redis
-          image: ${REDIS_IMAGE}
-          ports:
-            - containerPort: 6379
-          readinessProbe:
-            exec:
-              command: ["redis-cli", "ping"]
-            initialDelaySeconds: 3
-            periodSeconds: 5
-YAML
+render_manifest "$ADDON_DIR/redis.yaml" | $K apply -n "$NS" -f - >/dev/null
 
 echo "  waiting for redis..."
 $K rollout status deployment/redis -n "$NS" --timeout=180s