add multitenancy examples to the docs (#463)

Author: arturminchukov

provisioning/datasources/datasources.yml

@@ -10,4 +10,10 @@ datasources:
     access: proxy
     # <string> Sets URL for sending queries to VictoriaLogs server.
     # see https://docs.victoriametrics.com/victorialogs/querying/
-    url: http://victorialogs:9428
+    url: http://victorialogs:9428
+    jsonData:
+      # Multitenancy settings, see https://docs.victoriametrics.com/victorialogs/#multitenancy
+      # to use the multitenancy uncomment lines below: AccountID and ProjectID
+      multitenancyHeaders:
+        #AccountID: 0
+        #ProjectID: 0

src/README.md

@@ -21,6 +21,13 @@ Try it at [VictoriaMetrics playground](https://play-grafana.victoriametrics.com/
 For detailed instructions on how to install the plugin on Grafana Cloud or locally, please checkout the [Plugin installation docs](https://grafana.com/docs/grafana/latest/plugins/installation/).
 For installation options in Docker or Kubernetes refer to [these docs](https://github.com/VictoriaMetrics/victorialogs-datasource?tab=readme-ov-file#installation).
 
+## Multitenancy configuration
+
+VictoriaLogs datasource supports [multitenancy](https://docs.victoriametrics.com/victorialogs/#multitenancy) via `multitenancyHeaders` datasource configuration option. 
+To configure it, set AccountID and ProjectID in the `multitenancyHeaders` section.
+
+<img alt="Multitenancy configuration" src="https://github.com/VictoriaMetrics/victorialogs-datasource/blob/main/src/img/multitenancy_configuration.png?raw=true">
+
 ### Manual configuration via UI
 
 Once the plugin is installed on your Grafana instance, follow [these instructions](https://grafana.com/docs/grafana/latest/datasources/add-a-data-source/)
@@ -38,6 +45,12 @@ datasources:
     access: proxy
     url: http://victorialogs:9428
     isDefault: true
+    jsonData:
+      # Multitenancy settings, see https://docs.victoriametrics.com/victorialogs/#multitenancy
+      # to use the multitenancy, uncomment lines below: AccountID and ProjectID
+      multitenancyHeaders:
+        #AccountID: 0
+        #ProjectID: 0
 ```
 
 ## Building queries