doc: update grafana datasource docs

cmd/tools/grafana/grafana.go

@@ -1048,7 +1048,7 @@ func addFlags(commands ...*cobra.Command) {
 		cmd.PersistentFlags().StringVarP(&opts.token, "token", "t", "", "API token issued by Grafana server for authentication")
 		cmd.PersistentFlags().StringVar(&opts.svmRegex, "svm-variable-regex", "", "SVM variable regex to filter SVM query results")
 		cmd.PersistentFlags().StringVarP(&opts.prefix, "prefix", "p", "", "Use global metric prefix in queries")
-		cmd.PersistentFlags().StringVarP(&opts.datasource, "datasource", "s", grafanaDataSource, "Grafana datasource for the dashboards")
+		cmd.PersistentFlags().StringVarP(&opts.datasource, "datasource", "s", grafanaDataSource, "Name of your Grafana datasource of type Prometheus that should be used for the dashboards")
 		cmd.PersistentFlags().BoolVarP(&opts.variable, "variable", "v", false, "Use datasource as variable, overrides: --datasource")
 		cmd.PersistentFlags().BoolVarP(&opts.useHTTPS, "https", "S", false, "Use HTTPS")
 		cmd.PersistentFlags().BoolVarP(&opts.overwrite, "overwrite", "o", false, "Overwrite existing dashboard with same title")

docs/dashboards.md

@@ -27,9 +27,7 @@ Similarly, to export:
 $ bin/harvest grafana export --addr my.grafana.server:3000 --directory /path/to/export/directory --serverfolder grafanaFolderName
 ```
 
-By default, the dashboards are connected to the `Prometheus` datasource defined in Grafana. If your datasource has a
-different name, use the `--datasource` flag during import/export.
-
+By default, the dashboards are connected to a datasource named `Prometheus`. This is a datasource of the Prometheus type, defined in Grafana. However, despite the type, the datasource can have any name. If you have a Prometheus type datasource with a name different from `Prometheus`, you can specify this name using the `--datasource` flag during import/export.
 ### CLI
 
 The `bin/harvest grafana` tool includes CLI help when passing the `--help` command line argument flag like so: