[DOCS-10461] Add uninstall instructions and troubleshooting section (#28385)

* add uninstall instructions and to troubleshooting

* small edits

* Update content/en/observability_pipelines/install_the_worker.md

Co-authored-by: Janine Chan <[email protected]>

* upgrade instructions

* small edit

* Update content/en/observability_pipelines/install_the_worker.md

---------

Co-authored-by: Janine Chan <[email protected]>

Author: maycmlee

Diff for: content/en/observability_pipelines/install_the_worker.md

@@ -160,11 +160,59 @@ See [Update Existing Pipelines][1] if you want to make changes to your pipeline'
 {{% /tab %}}
 {{< /tabs >}}
 
-[1]: /observability_pipelines/advanced_configurations/#bootstrap-options
-[2]: /observability_pipelines/sources/
-[3]: /observability_pipelines/destinations/
-[4]: /observability_pipelines/processors/
+## Upgrade the Worker
+
+To upgrade the Worker to the latest version, run the following command:
+
+{{< tabs >}}
+{{% tab "APT" %}}
+
+```
+sudo apt-get install --only-upgrade observability-pipelines-worker
+```
+
+{{% /tab %}}
+{{% tab "RPM" %}}
+
+```
+sudo yum install --only-upgrade observability-pipelines-worker
+```
+
+{{% /tab %}}
+{{< /tabs >}}
+
+
+## Uninstall the Worker
+
+If you want to uninstall the Worker, run the following commands:
+
+{{< tabs >}}
+{{% tab "APT" %}}
+
+```
+sudo apt-get remove --purge observability-pipelines-worker
+```
+
+{{% /tab %}}
+{{% tab "RPM" %}}
+
+1.
+    ```
+    yum remove observability-pipelines-worker
+    ```
+1.
+    ```
+    rpm -q --configfiles observability-pipelines-worker
+    ```
+
+{{% /tab %}}
+{{< /tabs >}}
 
 ## Further reading
 
-{{< partial name="whats-next/whats-next.html" >}}
+{{< partial name="whats-next/whats-next.html" >}}
+
+[1]: /observability_pipelines/advanced_configurations/#bootstrap-options
+[2]: /observability_pipelines/sources/
+[3]: /observability_pipelines/destinations/
+[4]: /observability_pipelines/processors/

Diff for: content/en/observability_pipelines/troubleshooting.md

@@ -53,9 +53,14 @@ These are the batch parameters for each destination:
 
 See [event batching][6] for more information.
 
+## Getting an error when installing a new version of the Worker
+
+If you try to install a new version of the Worker in an instance that is running an older version of the Worker, you get an error. You need to [uninstall][7] the older version before you can install the new version of the Worker.
+
 [1]: /help/
 [2]: https://app.datadoghq.com/observability-pipelines
 [3]: /logs/explorer/search_syntax/
 [4]: /observability_pipelines/set_up_pipelines/#set-up-a-pipeline
 [5]: /observability_pipelines/advanced_configurations/#bootstrap-options
 [6]: /observability_pipelines/destinations/#event-batching-intro
+[7]: /observability_pipelines/install_the_worker#uninstall-the-worker