ansible-scylla-monitoring: Always look for the prometheus_rules_file …

…in scylla_monitoring_role_config_path

This patch adds a 'scylla_monitoring_role_config_path' var which defaults to "{{ inventory_path }}"
and defines that the monitoring role should always look for the prometheus_rules_file in the path defined
in this var.

ansible-scylla-monitoring/defaults/main.yml

@@ -20,6 +20,9 @@ scylla_manager_ip: '127.0.0.1'
 # Download the scylla-monitoring from here
 scylla_monitoring_archive_url: 'https://github.com/scylladb/scylla-monitoring/archive/scylla-monitoring-3.10.1.tar.gz'
 
+# The path where the role will look for config files
+scylla_monitoring_role_config_path: "{{ inventory_dir }}"
+
 scylla_monitoring_deploy_path: /opt/scylla-monitoring
 scylla_monitoring_data_path: "{{ scylla_monitoring_deploy_path }}/data"
 scylla_monitoring_config_path:  "{{ scylla_monitoring_deploy_path }}/config"
@@ -49,6 +52,7 @@ use_nodetool_status_with_genconfig: false
 # is always installed.
 # If below value is different from 'default' a corresponding file is going to be installed as 'userdefined.rules.yml'
 # in scylla_monitoring_prom_rules_path folder.
+# The value should be a file path relative to 'scylla_monitoring_role_config_path'.
 prometheus_rules_file: default
 
 # Reject filter for alerts in the prometheus.rules.yml that comes as part of the Monitoring distribution.

ansible-scylla-monitoring/tasks/common.yml

@@ -125,7 +125,7 @@
 
 - name: set prometheus rules file from preset file
   copy:
-    src: "{{ prometheus_rules_file }}"
+    src: "{{ scylla_monitoring_role_config_path }}/{{ prometheus_rules_file }}"
     dest: "{{ scylla_monitoring_prom_rules_path }}/userdefined.rules.yml"
     mode: '0644'
   when: prometheus_rules_file is defined and prometheus_rules_file != 'default'