Granular control for metric collection

README.md

@@ -16,6 +16,11 @@ groups:
   group1:
     username: group1_user
     password: group1_pass
+  flakey:
+    username: "Administrator"
+    password: "Password"
+    disabled_metrics:
+      - "ethernet_interfaces"
 ```
 Note that the ```default``` entry is useful as it avoids an error
 condition that is discussed in [this issue][2].
@@ -60,6 +65,35 @@ curl '127.0.0.1:9123/redfish?target=10.10.12.23&collectlogs=true'
 
 The `collectlogs` query parameter can be included in Prometheus config.
 
+## Disabling collection of specific groups of metrics
+
+Sometimes it isn't possible to gather all metrics from a BMC because
+it doesn't conform to the Redfish standard due to a bug. Or perhaps
+you don't need all the metrics. In either case, basic support exists
+for skipping specific metric groups at the `default`, `group` or
+`host` level:
+
+```yaml
+hosts:
+  10.36.48.24:
+    username: admin
+    password: pass
+    disabled_metrics:
+      - "ethernet_interfaces"
+  default:
+    username: admin
+    password: pass
+    disabled_metrics:
+      - "memory"
+      - "processor"
+      - "storage"
+      - "pcie_devices"
+      - "network_interfaces"
+      - "ethernet_interfaces"
+      - "simple_storage"
+      - "pcie_functions"
+```
+
 ## Building
 
 To build the redfish_exporter executable run the command:

collector/redfish_collector.go

@@ -40,15 +40,15 @@ type RedfishCollector struct {
 }
 
 // NewRedfishCollector return RedfishCollector
-func NewRedfishCollector(host string, username string, password string, collectLogs bool, logger *log.Entry) *RedfishCollector {
+func NewRedfishCollector(host string, username string, password string, collectLogs bool, disabledMetrics []string, logger *log.Entry) *RedfishCollector {
 	var collectors map[string]prometheus.Collector
 	collectorLogCtx := logger
 	redfishClient, err := newRedfishClient(host, username, password)
 	if err != nil {
 		collectorLogCtx.WithError(err).Error("error creating redfish client")
 	} else {
 		chassisCollector := NewChassisCollector(redfishClient, collectLogs, collectorLogCtx)
-		systemCollector := NewSystemCollector(redfishClient, collectLogs, collectorLogCtx)
+		systemCollector := NewSystemCollector(redfishClient, collectLogs, disabledMetrics, collectorLogCtx)
 		managerCollector := NewManagerCollector(redfishClient, collectLogs, collectorLogCtx)
 
 		collectors = map[string]prometheus.Collector{"chassis": chassisCollector, "system": systemCollector, "manager": managerCollector}