Use grafanalib to generate Grafana dashboards

hack/scripts/generate-dashboards-configmap.sh

@@ -1,13 +1,23 @@
 #!/bin/bash
+set -e
 
 cat <<-EOF
 apiVersion: v1
 kind: ConfigMap
 metadata:
-  name: grafana-dashboards
+  name: grafana-dashboards-0
 data:
 EOF
 
+virtualenv -p python3 .env
+source .env/bin/activate
+pip install -Ur requirements.txt
+for f in assets/grafana/*.dashboard.py
+do
+  JSON_FILENAME="$(pwd)/${f%%.*}-dashboard.json"
+  generate-dashboard $f -o $JSON_FILENAME 2>&1 > /dev/null
+done
+
 for f in assets/grafana/*-dashboard.json
 do
   echo "  $(basename $f): |+"