Automation Orchestrator install and tweaks

roles/sno_etcd_defrag/defaults/main.yml

@@ -0,0 +1,9 @@
+---
+# Defragment only when the in-use fraction of the etcd database drops below this
+# ratio and the database exceeds the minimum size (mirrors the thresholds of the
+# etcdDatabaseHighFragmentationRatio alert: < 50% in use and > 100 MiB).
+sno_etcd_defrag_max_in_use_ratio: 0.5
+sno_etcd_defrag_min_db_size_bytes: 104857600
+sno_etcd_defrag_command_timeout: 60
+# Set true to defragment regardless of the thresholds.
+sno_etcd_defrag_force: false