Allow global configuration for redfish devices username, password and endpoint.

receivers/redfishReceiver.go

@@ -6,6 +6,7 @@ import (
 	"fmt"
 	"net/http"
 	"strconv"
+	"strings"
 	"sync"
 	"time"
 
@@ -615,6 +616,11 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 		// Time limit for requests made by this HTTP client (default: 10 s)
 		HttpTimeoutString string `json:"http_timeout,omitempty"`
 
+		// Default client username, password and endpoint
+		Username *string `json:"username"` // User name to authenticate with
+		Password *string `json:"password"` // Password to use for authentication
+		Endpoint *string `json:"endpoint"` // URL of the redfish service
+
 		// Globally disable collection of power, processor or thermal metrics
 		DisablePowerMetrics     bool `json:"disable_power_metrics"`
 		DisableProcessorMetrics bool `json:"disable_processor_metrics"`
@@ -719,26 +725,37 @@ func NewRedfishReceiver(name string, config json.RawMessage) (Receiver, error) {
 		}
 		clientConfig.Hostname = *clientConfigJSON.Hostname
 
-		if clientConfigJSON.Endpoint == nil {
+		var endpoint string
+		if clientConfigJSON.Endpoint != nil {
+			endpoint = *clientConfigJSON.Endpoint
+		} else if configJSON.Endpoint != nil {
+			endpoint = *configJSON.Endpoint
+		} else {
 			err := fmt.Errorf("client config number %v requires endpoint", i)
 			cclog.ComponentError(r.name, err)
 			return nil, err
 		}
-		gofishConfig.Endpoint = *clientConfigJSON.Endpoint
+		gofishConfig.Endpoint = strings.Replace(endpoint, "%h", clientConfig.Hostname, -1)
 
-		if clientConfigJSON.Username == nil {
+		if clientConfigJSON.Username != nil {
+			gofishConfig.Username = *clientConfigJSON.Username
+		} else if configJSON.Username != nil {
+			gofishConfig.Username = *configJSON.Username
+		} else {
 			err := fmt.Errorf("client config number %v requires username", i)
 			cclog.ComponentError(r.name, err)
 			return nil, err
 		}
-		gofishConfig.Username = *clientConfigJSON.Username
 
-		if clientConfigJSON.Password == nil {
+		if clientConfigJSON.Password != nil {
+			gofishConfig.Password = *clientConfigJSON.Password
+		} else if configJSON.Password != nil {
+			gofishConfig.Password = *configJSON.Password
+		} else {
 			err := fmt.Errorf("client config number %v requires password", i)
 			cclog.ComponentError(r.name, err)
 			return nil, err
 		}
-		gofishConfig.Password = *clientConfigJSON.Password
 
 		// Reuse existing http client
 		gofishConfig.HTTPClient = httpClient

receivers/redfishReceiver.md

@@ -8,26 +8,23 @@ The Redfish receiver uses the [Redfish (specification)](https://www.dmtf.org/sta
 {
     "<redfish receiver name>": {
         "type": "redfish",
+        "username": "<user A>",
+        "password": "<password A>",
+        "endpoint": "https://%h-bmc",
         "exclude_metrics": [ "min_consumed_watts" ],
         "client_config": [
             {
-                "hostname": "<host 1>",
+                "hostname": "<host 1>"
-                "username": "<user 1>",
-                "password": "<password 1>",
-                "endpoint": "https://<endpoint 1>"
             },
             {
                 "hostname": "<host 2>",
-                "username": "<user 2>",
-                "password": "<password 2>",
-                "endpoint": "https://<endpoint 2>",
                 "disable_power_metrics": true
             },
             {
                 "hostname": "<host 3>",
-                "username": "<user 3>",
+                "username": "<user B>",
-                "password": "<password 3>",
+                "password": "<password B>",
-                "endpoint": "https://<endpoint 3>",
+                "endpoint": "https://%h-BMC",
                 "disable_thermal_metrics": true
             }
         ]
@@ -42,15 +39,15 @@ Global settings:
 - `http_insecure`: Control whether a client verifies the server's certificate (default: true == do not verify server's certificate)
 - `http_timeout`: Time limit for requests made by this HTTP client (default: 10 s)
 
-Global and per redfish device settings:
+Global and per redfish device settings (per redfish device settings overwrite the global settings):
 
 - `disable_power_metrics`: disable collection of power metrics
 - `disable_thermal_metrics`: disable collection of thermal metrics
 - `exclude_metrics`: list of excluded metrics
+- `username`: User name to authenticate with
+- `password`: Password to use for authentication
+- `endpoint`: URL of the redfish service (placeholder `%h` gets replaced by the hostname)
 
 Per redfish device settings:
 
 - `hostname`: hostname the redfish service belongs to
-- `username`: User name to authenticate with
-- `password`: Password to use for authentication
-- `endpoint`: URL of the redfish service