doc: smart-agent_system-diskio: add otel collector example

modules/smart-agent_system-diskio/README.md

@@ -106,9 +106,32 @@ Check the [Related documentation](#related-documentation) section for more detai
 
 System disk weighted io usage detector is disabled by default. It may be useful in some specific cases where system disk io usage detector show usage above 100% because of multi-queued IOs due to device or driver, please enable it only if you understand what it implies. See [Linux kernel documentation](https://docs.kernel.org/admin-guide/iostats.html).
 
-You must explicitely enable collection of those metrics on Agent:
-- system.disk.io_time
-- system.disk.weighted_io_time
+You must explicitely enable collection of those metrics on your agent:
+- disk io_time (when using IO usage detector)
+- disk weighted_io_time (when using weighted IO usage detector which is disabled by default)
+
+Otel Collector example: edit agent_config.yaml such as:
+```
+receivers:
+[...]
+  # <hostmetrics> is the receiver producing system.disk.io_time and system.disk.weighted_io_time metrics
+  hostmetrics:
+  collection_interval: 10s
+  scrapers:
+    disk:
+[...]
+exporters:
+  [...]
+  include_metrics:
+    - metric_name: system.disk.io_time
+    - metric_name: system.disk.weighted_io_time
+[...]
+service:
+pipelines:
+  metrics:
+    receivers: [hostmetrics, ...]
+    [...]
+```
 
 
 ### Metrics

modules/smart-agent_system-diskio/conf/readme.yaml

@@ -1,6 +1,29 @@
 source_doc: |
   System disk weighted io usage detector is disabled by default. It may be useful in some specific cases where system disk io usage detector show usage above 100% because of multi-queued IOs due to device or driver, please enable it only if you understand what it implies. See [Linux kernel documentation](https://docs.kernel.org/admin-guide/iostats.html).
 
-  You must explicitely enable collection of those metrics on Agent:
-  - system.disk.io_time
-  - system.disk.weighted_io_time
+  You must explicitely enable collection of those metrics on your agent:
+  - disk io_time (when using IO usage detector)
+  - disk weighted_io_time (when using weighted IO usage detector which is disabled by default)
+
+  Otel Collector example: edit agent_config.yaml such as:
+  ```
+  receivers:
+  [...]
+    # <hostmetrics> is the receiver producing system.disk.io_time and system.disk.weighted_io_time metrics
+    hostmetrics:
+    collection_interval: 10s
+    scrapers:
+      disk:
+  [...]
+  exporters:
+    [...]
+    include_metrics:
+      - metric_name: system.disk.io_time
+      - metric_name: system.disk.weighted_io_time
+  [...]
+  service:
+  pipelines:
+    metrics:
+      receivers: [hostmetrics, ...]
+      [...]
+  ```