Prometheus metrics are empty

[bundzmm]

Hello,

I am using a standalone installation of Spoolman and would like to configure a Grafana dashboard to monitor statistics.

I was surprised to find that the /metrics endpoint (e.g., IP:7912/metrics) is available and returns metric descriptions. However, most of the Spoolman-specific metrics appear to be empty. Here is an excerpt from my metrics page:

# HELP python_gc_objects_collected_total Objects collected during gc
# TYPE python_gc_objects_collected_total counter
python_gc_objects_collected_total{generation="0"} 15432.0
python_gc_objects_collected_total{generation="1"} 4697.0
python_gc_objects_collected_total{generation="2"} 987.0
# HELP python_gc_objects_uncollectable_total Uncollectable objects found during GC
# TYPE python_gc_objects_uncollectable_total counter
python_gc_objects_uncollectable_total{generation="0"} 0.0
python_gc_objects_uncollectable_total{generation="1"} 0.0
python_gc_objects_uncollectable_total{generation="2"} 0.0
# HELP python_gc_collections_total Number of times this generation was collected
# TYPE python_gc_collections_total counter
python_gc_collections_total{generation="0"} 312.0
python_gc_collections_total{generation="1"} 28.0
python_gc_collections_total{generation="2"} 2.0
# HELP python_info Python platform information
# TYPE python_info gauge
python_info{implementation="CPython",major="3",minor="12",patchlevel="3",version="3.12.3"} 1.0
# HELP process_virtual_memory_bytes Virtual memory size in bytes.
# TYPE process_virtual_memory_bytes gauge
process_virtual_memory_bytes 7.3836544e+08
# HELP process_resident_memory_bytes Resident memory size in bytes.
# TYPE process_resident_memory_bytes gauge
process_resident_memory_bytes 1.15740672e+08
# HELP process_start_time_seconds Start time of the process since unix epoch in seconds.
# TYPE process_start_time_seconds gauge
process_start_time_seconds 1.73822401183e+09
# HELP process_cpu_seconds_total Total user and system CPU time spent in seconds.
# TYPE process_cpu_seconds_total counter
process_cpu_seconds_total 10.8
# HELP process_open_fds Number of open file descriptors.
# TYPE process_open_fds gauge
process_open_fds 59.0
# HELP process_max_fds Maximum number of open file descriptors.
# TYPE process_max_fds gauge
process_max_fds 1024.0
# HELP spoolman_spool_price Total Spool price
# TYPE spoolman_spool_price gauge
# HELP spoolman_spool_weight_used Spool Used Weight
# TYPE spoolman_spool_weight_used gauge
# HELP spoolman_filament_info Filament information
# TYPE spoolman_filament_info gauge
# HELP spoolman_filament_density Density of filament
# TYPE spoolman_filament_density gauge
# HELP spoolman_filament_diameter Diameter of filament
# TYPE spoolman_filament_diameter gauge
# HELP spoolman_filament_weight Net weight of filament
# TYPE spoolman_filament_weight gauge

General system and Python-related metrics are populated correctly, but the Spoolman-related ones remain empty.

I am not very experienced in reading/debugging Spoolman’s code, so I was wondering if someone could help me troubleshoot this. Could this be a configuration issue? Do I need to adjust a setting or restart the service to populate these values?

Any guidance would be appreciated.