Fixed to write to file even if no PV's

Signed-off-by: Kalle Fagerberg <[email protected]>

textfile_collector.sh

@@ -36,9 +36,9 @@ function collect_pv_utilization_metrics(){
   done
 }
 
-collect_and_write_to_file() {
-  cap_metrics="$(collect_pv_capacity_metrics)"
-  util_metrics="$(collect_pv_utilization_metrics)"
+write_to_file() {
+  cap_metrics="${1:-""}"
+  util_metrics="${2:-""}"
 
   cat <<END > "${FILEPATH}"
 # Prometheus metrics generated by monitor-pv at $(date)
@@ -49,7 +49,6 @@ ${cap_metrics}
 # Utilization metrics
 ${util_metrics}
 END
-
 }
 
 while true
@@ -72,7 +71,11 @@ do
 
   if [[ ${#pv_list[@]} -ne 0 ]]; then
     echo "PV List: ${pv_list[@]}"
-    collect_and_write_to_file
+    cap_metrics="$(collect_pv_capacity_metrics)"
+    util_metrics="$(collect_pv_utilization_metrics)"
+    write_to_file "$cap_metrics" "$util_metrics"
+  else
+    write_to_file "" ""
   fi
 
   sleep ${INTERVAL}