[prometheus] Do not put :9100 in instance name

monitoring.yml

@@ -4,12 +4,7 @@
   vars:
     # Prometheus targets.json
     prometheus_targets:
-      - labels: {job: node}
-        targets: |
-          {{ groups['server'] | map('replace', '.org', '.org:9100') |
-          list | sort }}
-      - labels: {job: prometheus}
-        targets: ['localhost:9090']
+      - targets: "{{ groups['server'] | list | sort }}"
     prometheus_ups_snmp_targets:
       - targets: [pulsar.adm.crans.org]
     prometheus_unifi_snmp_targets:

roles/prometheus/templates/prometheus/prometheus.yml.j2

@@ -27,10 +27,24 @@ rule_files:
 scrape_configs:
   # The .json in file_sd_configs is dynamically reloaded
 
-  - job_name: dummy
+  - job_name: prometheus
+    static_configs:
+      - targets:
+        - localhost:9090
+
+  - job_name: servers
     file_sd_configs:
       - files:
         - '/etc/prometheus/targets.json'
+    relabel_configs:
+      # Do not put :9100 in instance name, rather here
+      - source_labels: [__address__]
+        target_label: __param_target
+      - source_labels: [__param_target]
+        target_label: instance
+      - source_labels: [__param_target]
+        target_label: __address__
+        replacement: '$1:9100'
 
   - job_name: ups_snmp
     file_sd_configs: