Too less data using prometheus exporter #1462

conf/glances.conf

@@ -450,20 +450,23 @@ prefix=G
 # https://prometheus.io
 # Create a Prometheus exporter listening on localhost:9091 (default configuration)
 # Metric are exporter using the following name:
-#   <prefix>_<plugin>_<stats> (all specials character are replaced by '_')
+#   <prefix>_<plugin>_<stats>{labelkey:labelvalue}
 # Note: You should add this exporter to your Prometheus server configuration:
 #   scrape_configs:
 #    - job_name: 'glances_exporter'
 #      scrape_interval: 5s
 #      static_configs:
 #        - targets: ['localhost:9091']
+#
+# Labels will be added for all measurements (default is src:glances)
+#  labels=foo:bar,spam:eggs
+# You can also use dynamic values
+#  labels=system:`uname -s`
+#
 host=localhost
 port=9091
-prefix=glances
-# Labels will be added for all measurements
-#labels=foo:bar,spam:eggs
-# You can also use dynamic values
-#labels=system:`uname -s`
+#prefix=glances
+#labels=src:glances
 
 [restful]
 # Configuration for the --export RESTful option

glances/exports/glances_prometheus.py

@@ -39,10 +39,6 @@ class Export(GlancesExport):
         """Init the Prometheus export IF."""
         super(Export, self).__init__(config=config, args=args)
 
-        # Optionals configuration keys
-        self.prefix = 'glances'
-        self.labels = None
-
         # Load the Prometheus configuration file section
         self.export_enable = self.load_conf('prometheus',
                                             mandatories=['host', 'port'],
@@ -50,6 +46,13 @@ class Export(GlancesExport):
         if not self.export_enable:
             sys.exit(2)
 
+        # Optionals configuration keys
+        if self.prefix is None:
+            self.prefix = 'glances'
+
+        if self.labels is None:
+            self.labels = 'src:glances'
+
         # Init the metric dict
         # Perhaps a better method is possible...
         self._metric_dict = {}
@@ -77,7 +80,7 @@ class Export(GlancesExport):
         # Write metrics to the Prometheus exporter
         for k, v in iteritems(data):
             # Prometheus metric name: prefix_<glances stats name>
-            metric_name = self.prefix + self.METRIC_SEPARATOR + name + self.METRIC_SEPARATOR + k
+            metric_name = self.prefix + self.METRIC_SEPARATOR + str(name) + self.METRIC_SEPARATOR + str(k)
             # Prometheus is very sensible to the metric name
             # See: https://prometheus.io/docs/practices/naming/
             for c in ['.', '-', '/', ' ']: