Actually set lookback delta

Author: jovial

etc/kayobe/kolla/globals.yml

@@ -26,7 +26,7 @@ kolla_image_tags:
 # Monitoring and alerting related settings
 
 opensearch_heap_size: 8g
-prometheus_cmdline_extras: "--storage.tsdb.retention.time=30d --query.lookback-delta=15m"
+prometheus_cmdline_extras: "--storage.tsdb.retention.time=30d --query.lookback-delta={{ stackhpc_prometheus_query_lookback_delta }}"
 
 # Additional command line flags for node exporter to enable texfile collector for disk metrics and create textfile docker volume
 prometheus_node_exporter_extra_volumes:

etc/kayobe/stackhpc-monitoring.yml

@@ -3,7 +3,7 @@
 ###############################################################################
 # Prometheus server configuration
 
-prometheus_query_lookback_delta: "{{ [redfish_exporter_scrape_interval, stackhpc_os_capacity_scrape_interval, 300] | max }}s"
+stackhpc_prometheus_query_lookback_delta: "{{ [redfish_exporter_scrape_interval, stackhpc_os_capacity_scrape_interval, 300] | max }}s"
 
 ###############################################################################
 # Alert configuration